Pilot Light Ignition
Agricultural Animal Confinement Building Heaters
Installation and Service Guide
150-22003 Foreword
The purpose of this Service Guide is to provide detailed instructions and information for the installation, maintenance, troubleshooting and repair of L.B. White pilot ignition agricultural heaters. By consulting specific sections within the guide, you will become acquainted with components and operation of the equipment as well as proper procedures to use during trouble analysis and repair. Parts illustrations and information for all L.B. White pilot ignition heaters is included. Illustrations in the various sections may not necessarily depict the actual heater model and are intended for reference only.
It is very important when using the guide to pay particular attention to any Warning or Caution statements printed throughout the guide, identifying areas where care must be exercised.
This Service Guide covers the majority of problems which may arise. However, as with any product, certain problems may be encountered which have not been covered. If such problems arise, please call Technical Service at 1-800-345-7200 from 7:00 a.m. to 5:00 p.m. Central Standard Time to address these problem areas.
It is L.B. White’s policy to continually upgrade our service network, therefore, new ideas and comments are welcomed for incorporation into this guide. GENERAL HAZARD WARNING ■ Failure to comply with the precautions and instructions provided within this guide, can result in: — Death — Serious bodily injury or burns — Property damage or loss from fire or explosion — Asphyxiation due to lack of adequate air supply or carbon monoxide poisoning — Electrical shock ■ Read this Service Guide before installing or servicing this heater. ■ Only properly-trained service people should repair or install L.B. White heaters. ■ Replacement labels are available at no charge. For assistance, contact L.B. White at 1-800-345-7200.
WARNING ■ Proper gas supply pressure must be provided to the inlet of the heater. ■ Refer to dataplate for proper gas supply pressure. ■ Gas pressure in excess of the maximum inlet pressure specified at the heater inlet can cause fires or explosions. ■ Fires or explosions can lead to serious injury, death, building damage or loss of livestock. ■ Gas pressure below the minimum inlet pressure specified at the heater inlet may cause improper combustion. ■ Improper combustion can lead to asphyxiation or carbon monoxide poisoning and therefore serious injury or death to humans and livestock.
WARNING Fire and Explosion Hazard WARNING Fire and Explosion Hazard ■ Not for home or recreational vehicle use. ■ Keep solid combustibles a safe distance ■ Installation of this heater in a home or away from the heater. recreational vehicle may result in a fire or explosion. ■ Solid combustibles include wood or paper ■ Fire or explosions can cause property products, feathers, straw, and dust. damage or loss of life. ■ Do not use the heater in spaces which contain or may contain volatile or airborne FOR YOUR SAFETY combustibles. Do not store or use gasoline or other flammable vapors and liquids in the vicinity ■ Volatile or airborne combustibles include of this or any other appliance. gasoline, solvents, paint thinner, dust particles or unknown chemicals. FOR YOUR SAFETY If you smell gas: ■ Failure to follow these instructions may result in a fire or explosion. ■ Open windows. ■ Don't touch electrical switches. ■ Fire or explosions can lead to property ■ Extinguish any open flame. damage, personal injury or loss of life. ■ Immediately call your gas supplier. Table of Contents
Section 1 General Information Section/Page Basic Unit Description and Application ...... 1.1 Key Markings; Purpose and Location ...... 1.1 Heater Specifications ...... 1.2 Safety Precautions ...... 1.3 Section 2 Installation Instructions General ...... 2.1 Gas Supply - Pipe Sizing ...... 2.2 - Tank Sizing ...... 2.3 - Tank Location and Installation ...... 2.4 - LP Gas Tank Manifolding ...... 2.5 - Manual Shut-Off Valve, Hose and Regulator Assembly ...... 2.6 - Sediment Trap ...... 2.7 Electrical Supply - Requirements ...... 2.8 - Thermostat Wiring Models: 346/348, 377/379, 408/410 ...... 2.9-1 AS040 ...... 2.9-2 AB200 and AB250 ...... 2.9-3 Indoor Installation - Hanging Instructions ...... 2.10 - Air Diverters Two-Piece ...... 2.11-1 One-Piece ...... 2.11-2 Section 3 Operation Instructions Start-Up and Shut-Down ...... 3.1 Variable Heat Output ...... 3.2 Section 4 Preventative Maintenance Periodic Inspection ...... 4.1 Cleaning Instructions ...... 4.2 Section 5 Troubleshooting Instructions Troubleshooting Guide ...... 5.1 Section 6 Component Testing Voltage Checks ...... 6.1 Continuity Checks ...... 6.2 Thermocouple and Power Unit Tests ...... 6.3 High Limit Switch Tests ...... 6.4 Section 7 Wiring Diagrams Electrical Connection and Ladder Diagram ...... 7.1
General Information
Basic Unit Description and Application
Pilot ignition agricultural building heaters are direct-fired, As a non-vented heater, adequate ventilation must be non-vented heaters used in the heating of animal provided to ensure fresh air for combustion and removal of confinement buildings (examples: swine, chicken, and combustion by-products from the building. turkey). These heaters utilize a system that ignites the gas by a conventional pilot flame rather than by direct spark or a This style of heater is offered in a wide range of input ratings, hot surface igniter. L.B. White offers you the most some with variable heat control, to help manage heating dependable pilot system in the industry. Tested and proven needs efficiently. over time, these heaters provide simple yet reliable operation. All heaters referred to in this guide are to be mounted inside the building at appropriate locations to help provide proper warm air flow in the room being heated.
Key Markings; Purpose and Location
Markings constitute safety related information such as the Familiarize yourself with the location and content of all dataplate, start-up/shut-down instructions, warnings, etc. markings. Location may vary depending on model. If any that are applied on the heater to allow the qualified service markings are damaged or unreadable, replace the markings person or end user to operate the heater in a safe manner. immediately. Contact the L.B. White Company. A. Dataplate DESI GN MERI CA MODEL AB250 AW060 A N Purpose: GS CONFIGURATION NO. AHPD210000 A A S N SOCI ATI O Used for identification of model number, and SERIAL NO.: C ERTI FI ED configuration number and also critical information MAXIMUM INPUT: 250,00060,000 BTUH TYPE FUEL: PROPANE VAPOR WITHDRAWAL such as safe clearances to combustibles, burner BURNER MANIFOLD PRESSURE 10.0 IN W.C. AT MAXIMUM INPUT manifold pressure, maximum and minimum ELECTRICAL: 115 VOLTS A.C. 60 HZ SINGLE PHASE 1.5 AMPS MIN. CLEARANCES FROM HEATER TO ADJACENT COMBUSTIBLE MATERIALS: REAR 1 FT SIDES 1 FT allowable inlet pressures, etc. TOP TO CEILING 1 FT BLOWER OUTLET 6 FT AND FUEL CONTAINER 6 FT VENTILATION: 240 CFM OF AIR REQUIRED TO SUPPORT COMBUSTION. MAXIMUM 13.5 INCHES W.C. AND MINIMUM 11.5 INCHES W.C. GAS SUPPLY PRESSURE Typical Location: ACCEPTABLE AT INLET 0F HEATER FOR PURPOSE OF INPUT ADJUSTMENT. POSITION HEATER AWAY FROM LIVESTOCK Interior or exterior of burner end access panel. AGRICULTURAL BUILDING HEATER
Part No.: L. B. WHITE CO., INC. W6636 L.B. WHITE ROAD ONALASKA, WI 54650 608/783-5691 Varies with design sequence and model number. Contact L.B. White Co.
B. Start Up and Shut Down Procedures Purpose: Provides the basic information to safely start up and shut down the heater and also provides cautionary information relative to various safety aspects of installation and application. Typical Location: Next to dataplate. Part No.: 150-20158
August 1999 1.1-11 General Information
Heater Specifications Model SPECIFICATIONS 346 348 377 379 408 410 AS040 L.P. Natural L.P. Natural L.P. Natural L.P. Natural Gas Gas Gas Gas Gas Gas Gas Gas Maximum Input (BTUH) 60,000 115,000 170,000 40,000 Minimum Input (BTUH) N/A N/A N/A 15,000 Ventilation Air Required to Support Combustion 250 CFM 600 CFM 760 CFM 220 CFM
MAX. 13.5 in. W.C. N/A Heaters Using Inlet Gas Control Valves Supply Pressure With Internal MIN. 10.5 in. 7.0 in. 11.0 in. 7.0 in. 11.0 in. 7.0 in. N/A N/A Low Pressure W.C. W.C. W.C. W.C. W.C. W.C. Regulator and Gas Shut Off Burner Manifold 10.0 in. W.C. 4.0 in. W.C. 10.0 in. W.C. 4.0 in. W.C. 10.0 in. W.C. 4.0 in. W.C. N/A N/A Pressure
11.5 in. 3.6 in. 11.5 in. 4.5 in. 11.5 in. 4.5 in. 11.5 in. 3.6 in. Heaters Using MAX. Control Valves Inlet Gas W.C. W.C. W.C. W.C. W.C. W.C. W.C. W.C. Less Internal Supply Low Pressure Pressure 11.5 in. 3.6 in. 11.5 in. 4.5 in. 11.5 in. 4.5 in. 11.5 in. 3.6 in. Regulator and MIN. Gas Shut Off W.C. W.C. W.C. W.C. W.C. W.C. W.C. W.C. (Control Valve Burner Part #500- Manifold 11 in. W.C. 3.4 in. W.C. 11 in. W.C. 4 in. W.C. 11 in. W.C. 4 in. W.C. 11 in. W.C. 3.5 in. W.C. 02309) Pressure
Fuel Consumption MAX. 2.78 lbs. 60 cu. ft. 5.32 lbs. 115 cu. ft. 7.87 lbs. 170 cu. ft. 1.85 lbs. 40 cu. ft. Per Hour MIN. N/A N/A N/A N/A N/A N/A .69 lbs. 15 cu. ft.
Sleeve Bearing Ball Bearing Motor Characteristics 1/12 H.P. 1/5 H.P. 1/3 H.P. 1/30 H.P. 1700 RPM 1100 RPM 1100 RPM 1725 RPM Electrical Supply 115/60/1 (Volts/Hz/Phase) STARTING 3.0 6.0 6.5 4.5 Amp Draw CONTINUOUS OPERATION 1.0 1.6 2.2 1.5 Dimensions (Inches) 21 1/4 x 11 1/4 x 24 23 x 16 1/2 x 24 24 x 19 x 30 21 1/4 x 14 1/2 x 16 3/4 L x W x H TOP 6 in. 1 ft. 6 in. Minimum Safe SIDES 6 in. 1 ft. 6 in. Distances From BACK 6 in. 1 ft. 6 in. Nearest BLOWER Combustible OUTLET 4 ft. 6 ft. Materials GAS L.P. Gas Supply — 6 ft. (1.83 m) SUPPLY Natural Gas Supply — N/A Net Weight (lbs.) 55 90 110 39 Shipping Weight (lbs.) 61 100 129 43
1.2-11 August 1999 General Information
Heater Specifications Model
SPECIFICATIONS AB200 AB250 L.P. Natural L.P. Natural Gas Gas Gas Gas Maximum Input (BTUH) 200,000 250,000 Minimum Input (BTUH) N/A 160,000 Ventilation Air Required 760 CFM 1100 CFM to Support Combustion
MAX. N/A 13.5 in. W.C. Heaters Using Inlet Gas Control Valves Supply With Internal Pressure MIN. N/A N/A 11.5 in. 7.0 in. Low Pressure W.C. W.C. Regulator and Burner Gas Shut Off Manifold N/A N/A 10.0 in. 4.0 in. Pressure W.C. W.C. Heaters Using 11.5 in. 4.5 in. N/A N/A Control Valves Inlet Gas MAX. W.C. W.C. Less Internal Supply Low Pressure Pressure MIN. 11.5 in. 4.5 in. N/A N/A Regulator and W.C. W.C. Gas Shut Off Burner (Control Valve 11 in. 4.0 in. Part #500- Manifold N/A N/A 02309) Pressure W.C. W.C. 9.26 200 11.57 250 Fuel Consumption MAX. lbs. cu. ft. lbs. cu. ft. Per Hour N/A N/A 7.41 160 MIN. lbs. cu. ft. Ball Bearing Motor Characteristics 1/5 H.P. 1/3 H.P. 1100 RPM 1075 RPM Electrical Supply 115/60/1 (Volts/Hz/Phase)
STARTING 12 14.5 Amp Draw CONTINUOUS 4.0 4.8 OPERATION Dimensions (Inches) 24 3/4 x 20 x 30 30 3/4 x 18 1/4 x 28 1/4 L x W x H TOP 1 ft. Minimum Safe SIDES 1 ft. Distances From BACK 1 ft. Nearest BLOWER 6 ft. Combustible OUTLET Materials GAS L.P. Gas Supply — 6 ft. (1.83 m) SUPPLY Natural Gas Supply — N/A Net Weight (lbs.) 98 109 Shipping Weight (lbs.) 120 126
August 1999 1.2-22 General Information
Safety Precautions WARNING Asphyxiation Hazard ■ Do not use this heater for heating human living quarters. the L.B. White Company to determine combustion air ventilation requirements of the heater. ■ Do not use in unventilated areas. ■ Lack of proper ventilation air will lead to improper ■ The flow of combustion and ventilation air must not be combustion. obstructed. ■ Improper combustion can lead to carbon monoxide ■ Proper ventilation air must be provided to support the poisoning in humans leading to serious injury or death. combustion air requirements of the heater being used. Symptoms of carbon monoxide poisoning can include headaches, dizziness and difficulty in breathing. ■ Refer to the specification section of this guide, the heater’s Owner’s Manual, heater dataplate, or contact ■ Symptoms of improper combustion affecting livestock can be disease, lower feed conversion, or death. FUEL GAS ODOR LP gas and natural gas have man-mmade odorants added specifically for detection of fuel gas leaks. If a gas leak occurs, you should be able to smell the fuel gas. THAT’S YOUR SIGNAL TO GO INTO IMMEDIATE ACTION! ■ Do not take any action that could ignite the fuel gas. Do ■ Natural gas is lighter than air and can collect around not operate any electrical switches. Do not pull any rafters or ceilings. power supply or extension cords. Do not light matches or any other source of flame. Do not use your telephone. ■ Use your neighbor’s phone and call your fuel gas supplier and your fire department. Do not re-enter the ■ Get everyone out of the building and away from the area building or area. immediately. ■ Stay out of the building and away from area until ■ Close all propane (LP) gas tank or cylinder fuel supply declared safe by the firefighters and fuel gas supplier. valves, or the main fuel supply valve located at the meter if you use natural gas. ■ FINALLY, let the fuel gas service person and the firefighters check for escaped gas. Have them air out ■ Propane (LP) gas is heavier than air and may settle in low the building and area before you return. Properly trained areas. When you have reason to suspect a propane service people must repair the leak, check for further leak, keep out of all low areas. leakages, and then relight the appliance for you. ODOR FADING -- NO ODOR DETECTED ■ Some people cannot smell well. Some people cannot ■ The odorant in propane (LP) gas and natural gas is smell the odor of the man-mmade chemical added to colorless and the intensity of its odor can fade under propane (LP) or natural gas. You must determine if you some circumstances. can smell the odorant in these fuel gases. ■ If there is an underground leak, the movement of gas ■ Learn to recognize the odor of propane (LP) gas and through the soil can filter the odorant. natural gas. Local propane (LP) gas dealers and your local natural gas supplier (utility) will be more than ■ Propane (LP) gas odor may differ in intensity at different happy to give you a scratch and sniff pamphlet. Use it to levels. Since propane (LP) gas is heavier than air, there become familiar with the fuel gas odor. may be more odor at lower levels. ■ Smoking can decrease your ability to smell. Being ■ Always be sensitive to the slightest gas odor. If you around an odor for a period of time can affect your continue to detect any gas odor, no matter how small, sensitivity to that particular odor. Odors present in treat it as a serious leak. Immediately go into action as animal confinement buildings can mask fuel gas odor. discussed previously. ATTENTION -- CRITICAL POINTS TO REMEMBER! ■ Propane (LP) gas and natural gas have a distinctive odor. ■ Even if you are not properly trained in the service and Learn to recognize these odors. (Reference Fuel Gas repair of the heater, ALWAYS be consciously aware of the Odor and Odor Fading sections above. odors of propane (LP) gas and natural gas. ■ If you have not been properly trained in repair and service ■ A periodic “sniff test” around the heater or at the of propane (LP) gas and natural gas fueled heaters, then heater’s joints; i.e. hose, connections, etc., is a good do not attempt to light heater, perform service or repairs, safety practice under any conditions. If you smell even a or make any adjustments to the heater on propane (LP) small amount of gas, CONTACT YOUR FUEL GAS gas or natural gas fuel system. SUPPLIER IMMEDIATELY. DO NOT WAIT! 1.3-11 August 1999 General Information
Safety Precautions
1. Do not attempt to install, repair, or service this heater 3. Do not move, handle, or service heater while in or the gas supply line unless you have continuing operation or connected to a power or fuel supply. expert training and knowledge of gas heaters. 4. Observe and obey all instructional warnings pertaining Qualifications for service and installation of this to cleaning procedures located on each heater. equipment are as follows: 5. For safety, this heater is equipped with a manual reset a. To be a qualified gas heater service person, you high-limit switch and where applicable, an air proving must have sufficient training and experience to switch. Never operate this heater with any safety handle all aspects of gas-fired heater installation, device that has been bypassed. Do not operate this service and repair. This includes the task of heater unless all of these features are fully installation, troubleshooting, replacement of functioning. defective parts and testing of the heater. You must be able to place the heater into a continuing safe 6. Do not operate the heater with its door open or panel and normal operating condition. You must removed. completely familiarize yourself with each model heater by reading and complying with the safety 7. Do not locate fuel gas containers or fuel supply hoses instructions, labels, Owner’s Manual, etc., that is anywhere near the blower outlet of the heater. provided with each heater. 8. Do not block air intakes or discharge outlets of the b. To be a qualified gas installation person, you must heater. Doing so may cause improper combustion or have sufficient training and experience to handle damage to heater components leading to property all aspects of installing, repairing and altering gas damage or animal loss. lines, including selecting and installing the proper equipment, and selecting proper pipe and tank 9. The hose assembly shall be visually inspected on an size to be used. This must be done in accordance annual basis. If it is evident there is excessive with all local, state and national codes as well as abrasion or wear, or if the hose is cut, it must be the manufacturer’s requirements. replaced prior to the heater being put into operation. The hose assembly shall be protected from animals, 2. All installations and applications of L.B. White heaters building materials, and contact with hot surfaces must meet all relevant local, state and national codes. during use. The hose assembly shall be that specified Included are L.P. gas, natural gas, electrical, and by the manufacturer. See parts list. safety codes. Your local fuel gas supplier, a local licensed electrician, the local fire department or 10. Check for gas leaks and proper function upon heater similar government agencies, or your insurance agent installation, before building repopulation or when can help you determine code requirements. relocating.
a. For U.S.A. installations and applications: 11. This heater should be inspected for proper operation by a qualified service person before building -- ANSI/NFPA 58, latest edition, Standard for repopulation and at least annually. Storage and Handling of Liquefied Petroleum Gas and/or 12. Inform the customer to always turn off the gas supply to the heater if the heater is not going to be used in -- ANSI Z223.1/NFPA 54, National Fuel Gas Code the heating of livestock.
-- ANSI/NFPA 70, National Electrical Code. 13. This heater is equipped with a three-prong (grounding) plug for your protection against shock hazard and b. For Canadian Installations and Applications: must be plugged directly into a properly grounded
-- CAN1-B149.1 or CAN1-B149.2 Installation Codes
-- CSA C22.1 Part 1 Standard Canadian Electrical Code. CSA C22.2 No. 3, Electrical Features of Fuel-Burning Equipment.
August 1999 1.3-22 General Information
Safety Precautions
three-prong receptacle. Failure to use a properly 15. Non-hanging heater installations that do not use an grounded receptacle can result in electrical shock, approved gas hose assembly must conform to local personal injury, or death. gas code requirements. In absence of local codes, follow ANSI/NFPA58, Standard for Storage and 14. If gas flow is interrupted and flame goes out, do not Handling of Liquefied Petroleum Gas. relight the heater until you are sure that all gas that may have accumulated has cleared away. In any event, do not relight the heater for at least 5 minutes.
1.4-33 August 1999 Installation Instructions
General Information
end or motor end access door, for the gas WARNING configuration of the specific heater. Do not use the Fire or explosion hazard. heater in an L.P. gas liquid withdrawal system or Can cause property damage, severe injury or death. application. If you are in doubt, contact the L.B. White ■ Disconnect power supply before wiring to prevent Co., Inc. electrical shock or equipment damage. ■ To avoid dangerous accumulation of fuel gas, turn off 5. Eventually, like all electrical/mechanical devices, the gas supply at the appliance service valve before thermostat can fail. Thermostat failure may result in starting installation, and perform gas leak test after either an underheating or overheating condition which completion of installation. may damage critical products and/or cause animal ■ injury or death. Critical products and/or animals Do not force the gas control knob. Use only your hand should be protected by a separate back-up control to turn the gas control knob. Never use any tools. If system that limits high and low temperatures and also the knob will not operate by hand, the control should activates appropriate alarms. be replaced by a qualified service technician. Force or attempted repair may result in fire or explosion. 6. Take time to explain to your customer how to operate and maintain the heater by using this Service Guide. Make sure your customer knows how to shut off the 1. Read all safety precautions and follow L. B. White gas supply to the building and also to the individual recommendations when installing this heater. If heater. In the event of an emergency, have your during the installation or relocating of heater, you customer contact you or the fuel gas supplier if you suspect that a part is damaged or defective, call a have any questions. qualified service agency for repair or replacement. 7. Any defects found in performing any of the service or 2. Insure that all accessories that ship within the heater maintenance procedures must be eliminated and have been removed from inside of heater and defective parts replaced immediately. The heater installed. This pertains to air diverters, hose, must be retested by properly qualified service regulators, etc. personnel before placing the heater back into use.
3. A qualified service agency must check for proper 8. Do not exceed input rating stamped on the dataplate operating gas pressure upon installation of the heater. of the heater. Do not exceed the burner manifold pressure stated on the dataplate. Do not use an 4. L.B. White heaters can be configured for use with orifice size different than specified for the specific either L.P. gas vapor withdrawal or natural gas. input rating of this heater, fuel type, configuration and Consult the dataplate, located on interior of the burner altitude.
August 1999 2.1-11 Installation Instructions
Pipe Sizing
GENERAL INFORMATION
Pipe sizing is critical to the proper operation of any gas c. The information in the pipe sizing tables was obtained heating system. However, piping is dependent on several from Engineered Control International, Inc., L.P. Gas factors: Serviceman’s Manual L545.
1. Total gas load expressed in BTUH. d. Do not attempt gas supply line selection or installation unless you are properly trained and qualified. 2. The gas pressure to be supplied through the piping system. This pressure may be expressed in pounds of e. All gas supply lines must be leak checked after pressure per square inch (psi) or inches of water installation and when pressurized to provide a safe column (W.C.). installation. Use only certified, approved leak detectors. 3. Distance that the gas must travel to feed the heater furthest from the regulator. f. This is one example showing how to size piping for a building. Installation layouts differ as do the This section provides a basic explanation of how to size pressures being supplied to piping, whether you are piping for the heaters through the use of pipe sizing tables using for LP gas or natural gas and the material (pipe and a typical example. In all cases with this example, we will or copper tubing) being used. be using only pounds of pressure, expressed as 5 psi and not inches of water column. INSTRUCTIONS
a. Black iron pipe only was used in this example as it is a. Determine total gas demand for entire system, by less expensive per foot than copper tubing and, adding up BTUH input from heater dataplates and therefore, more commonly used. However, the same adding demand for any other gas-fired appliances and selection process using copper tubing may be done if any future heaters. so desired. Refer to appropriate pipe sizing tables for copper tubing. All pipe diameters given are measured b. Measure the length of piping required from outlet of in inner diameter (I.D.). Piping planning and first-stage regulator to the appliance furthest away. installation must be done by an experienced, qualified No other length is necessary to do the sizing. In this LP gas installation agency. example the distance from first-stage regulator to appliance furthest away is 230 ft. b. The minimum pipe size normally used in many situations is 1/2 in. nominal. c. Make a sketch of the piping system and installation. See Fig. 1. Fig. 1
First Stage Regulator (Tank Pressure Reduced to 5 psig) LP Tank A 50'
20' 50' 50' 50' 30' 30' 50' 20'
F E D C B G H
Heater 40' Second Stage Regulator, 5 psig Inlet
300'
2.2-11 August 1999 Installation Instructions
Pipe Sizing
EXAMPLE (Refer to Fig 2)
IMPORTANT: If exact length is not on chart, use next longer c. Section C to D must supply a load of 750,000 BTUH. length. Select the size of pipe that shows at least as much Select 3/4 inch pipe for Section C to D. capacity as needed for each piping section. d. Section D to E must supply a load of 500,000 BTUH. a. Section A to B of pipe must supply the complete gas Select 1/2 inch pipe. load of 1,500,000 BTUH for the entire building. Looking at the 5 PSIG sizing chart, the size of pipe e. Sections E to F must supply 250,000 BTUH. Select used in conveying gas would need to be sized at 1 1/2 inch pipe. inch diameter pipe. Note that even though furthest distance from first stage regulator to appliance is 230 f. Sections B to C must supply 500,000 BTUH. Use 1/2 ft., we use the 250 ft. length. inch pipe.
b. Section B to C must supply the load of 1,000,000 g. The final section, G to H, needs only 250,000 BTUH BTUH. Select 3/4 inch pipe for Section B to C. for gas usage. This section would use 1/2 inch pipe. Fig. 2 EXAMPLE Perform pipe sizing for building. Total heat load is 1,500,000 BTUH. Quantity 6 - 250,000 BTUH heaters. Building is 300 ft. long x 40 ft. wide. Section BTUH LP Gas Pipe Size Gas Load @ 5 PSIG A - B 1,500,000 1 in. B - C 1,000,000 3/4 in. C - D 750,000 3/4 in. D - E 500,000 1/2 in. E - F 250,000 1/2 in. B - G 500,000 1/2 in. G - H 250,000 1/2 in. First Stage Pipe Sizing 5 PSIG Inlet with a 1 PSIG Pressure Drop Maximum capacity of pipe or tubing, in thousands of BTU/hr. of LP Gas
IMPORTANT: If exact length is not on chart, use next longer length. Select the size of pipe that shows at least as much capacity as needed for each piping section. Pipe Size Length of Pipe or Tubing (In Inches) (In Feet)* 10 20 30 40 50 60 70 80 90 100 1/2 2946 2025 1626 1392 1233 1118 1028 957 897 848 3/4 6161 4234 3400 2910 2579 2337 2150 2000 1877 1773 1 11605 7976 6405 5482 4859 4402 4050 3768 3535 3339 125 150 175 200 225 250 275 300 350 400 1/2 751 681 626 583 547 516 490 468 430 400 3/4 1571 1424 1310 1218 1143 1080 1026 978 900 837 1 2956 2682 2467 2295 2153 2034 1932 1843 1696 1577 * Total length of piping from outlet of first stage regulator to inlet of second stage regulator (or to inlet of second stage regulator furthest away).
August 1999 2.2-22 Installation Instructions
Tank Sizing
pressure washers, water heaters, etc., that will be ATTENTION drawing vapor from the tanks. ■ The following is supplied for informational purposes --- The heat input rating is located on the dataplate. only. ■ The coldest outside air temperature at night that the ■ Consult your LP gas supplier for specific requirements. tank(s) will be exposed to. A tank is propane storage container ranging in size from 150 ■ Percentage of propane remaining in the tank prior to gallons to 10,000 gallons or larger. For agricultural heating refill. Your fuel gas supplier will inform you at what applications, the tank sizes typically used are either 500 level a refill will normally occur. gallons or 1,000 gallons with 1,000 gallons being the most common. The size and quantity of tanks will vary and is IMPORTANT dependent on the total heating load at the site. ■ Minimum vaporization of propane from liquid to vapor In determining tank size and quantity, several factors apply: occurs when temperatures are coldest and liquid level of propane in the tank is lowest. ■ Total heat load of the building ■ Size the quantity of tanks for the lowest temperature --- To determine total load, add up the heat input you can expect in your area. (expressed in BTUH) for all gas-fired heaters, Refer to the following table to identify the heat output of tanks at various temperatures and levels of fullness. Tank Size Outside Percentage of Liquid Propane (Gallons) Temps. Remaining Prior to Refill (Heat Input Expressed in BTUH) º F. 80% 70% 60% 50% 40% 30% 20% 10% 0 532,800 488,400 444,000 400,000 355,000 311,000 266,000 200,000 500 -5 399,600 366,300 333,000 300,000 262,500 233,250 199,500 150,000 -10 266,400 244,200 222,000 200,000 177,500 155,500 133,000 100,000 -15 132,200 122,100 111,000 100,000 88,750 77,750 66,500 50,000 0 949,000 870,100 791,000 712,000 633,000 553,000 474,000 356,000 1,000 -5 711,900 652,575 593,250 534,000 474,750 414,750 355,500 267,000 -10 474,600 435,050 395,500 356,000 316,500 276,500 237,000 178,000 -15 237,300 217,525 197,750 178,000 158,250 138,250 118,500 89,000
NOTE: For above table, multiply the results obtained by one of the following factors if nighttime temperatures will not reach 0º F. : Temperature Multiplier +5º F. 1.25 +10º F. 1.50 +15º F. 1.75 +20º F. 2.00 EXAMPLE --- Select 1,000 gallon tank. D. To determine the total number of tanks required: --- Total heat load is 1,500,000 BTUH (6-AB250 Total Heat Load of Building Heaters). Heat Output of 1,000 Gallon Tank --- Coldest nighttime temperature is -10º F. --- Tanks to be refilled by LP gas supplier when liquid or propane level is 30%. 1,500,000 BTUH/Building = 5.4 Tanks A. In the 1,000 gallon tank sizing chart, locate -10º F. 276,500 BTUH/Tanks (6 Tanks) outside temperature. NOTE: B. Locate the column which identifies 30% of propane Always round up fractions or decimals. See example. remaining in the tank prior to refill. (Example: 5.4 tanks = 6 tanks). This will give you some extra capacity especially in cold weather, in the event your LP gas C. The intersection of these two variables identifies the supplier cannot refill your tanks immediately. heat input. In this example, a 1,000 gallon tank can supply 276,500 BTUH. (See shaded area in table.) 2.3-11 August 1999 Installation Instructions
Tank Location and Installation
Tanks should be placed in a location pleasing to the ATTENTION customer that does not conflict with state or local regulations or NFPA 58 (Storage and Handling of Liquefied ■ The following is supplied for informational purposes Petroleum Gases). only. Generally, LP gas tanks should be placed in an accessible ■ Tank installation shall only be accomplished by a location for filling, supported by concrete of appropriate size qualified LP gas installation person. and reinforcement, and located away from vehicular traffic. Where the tank may be subjected to abrasive action or ■ State and local codes must be observed at all times. physical damage due to vehicular traffic or other causes, it must be placed not less than two feet below grade, or ■ In absence of state and local codes, follow otherwise protected against such physical damage. ANSI/NFPA58 Standard for Storage and Handling of Liquefied Petroleum Gases. Regardless of its size, attention must be paid to the tank distance from building openings, external sources of ignition, intakes to any outdoor mounted heaters, or mechanical Once the proper size of the LP gas supply tank(s) has been ventilation systems. Refer to NFPA58 and the following determined, attention must now be given to the most illustration for the minimum distances that the LP gas tanks convenient, yet safe, location of the tanks on the customer’s must be placed from the building or other objects. property.
INLET / EXHAUST FANS
25' MIN (SEE NOTE 2) 10' MIN 501-2,000 VENTILATION FANS GALLON TANK CAPACITY 10' MIN 125-500 GALLON 25' MIN TANK CAPACITY NEAREST LINE OF ADJOINING PROPERTY WHICH MAY BE BUILT UPON
NOTE: 1. REGARDLESS OF SIZE, ALL TANKS FILLED ON SITE MUST BE LOCATED AT LEAST 10 FEET FROM NEAREST SOURCE OF IGNITION (FANS, HEATERS, ETC.) 2. THIS DISTANCE MAY BE REDUCED TO NO LESS THAN 10' FOR A SINGLE CONTAINER OF 1200 GALLON CAPACITY OR LESS, PROVIDED THAT THE CONTAINER IS AT LEAST 25' FROM ANY OTHER L.P. GAS CONTAINER OF MORE THAN 125 GALLON CAPACITY. 3. DISTANCE FROM TANK TO BUILDING FOR TANKS OF 2,001-30,000 GALLON CAPACITY IS 50 FEET. August 1999 2.4-11 Installation Instructions
LP Gas Tank Manifolding
ATTENTION
■ The following is supplied for informational purposes However, when tanks are manifolded together, never use a only. first-stage regulator at each tank. If this is done, the total required capacity for the installation may not be obtained. It ■ Tank manifolding shall only be accomplished by a is almost impossible to set all regulators at the identical qualified LP gas installation person. pressure. Therefore, the regulator delivering the highest outlet pressure will backpressure the other regulators, in ■ Local and state codes must be observed at all times. turn keeping them from operating. In effect, only one tank would be supplying gas to the building. In this situation, ■ In absence of state and local codes, follow especially on large capacity installations, ignition failures ANSI/NFPA58 Standard for Storage and Handling of would occur due to poor gas volume and pressure. Liquefied Petroleum Gases. To eliminate this problem, run high pressure piping from the It has been a long-standing industry practice to manifold two LP gas tanks into a common line, then install one first-stage or more LP gas storage tanks together in order to increase regulator that can handle the required capacity of the gas system vaporization capacity. installation. Refer to the following illustrations.
CORRECT INSTALLATION INCORRECT INSTALLATION
1,000 GALLON 1,000 GALLON TANKS TANKS
FIRST STAGE REGULATORS (ONE FOR EACH TANK)
FIRST STAGE REGULATOR
TO BUILDING'S TO BUILDING'S SECOND STAGE SECOND STAGE REGULATOR(S) REGULATOR(S)
2.5-11 August 1999 Installation Instructions
Manual Shut-Off Valve, Hose and Regulator Assembly
1. Always use approved pipe thread compound suitable 6. The heater’s gas regulator (with pressure relief valve) for use with L.P. gas or natural gas on the threaded should be installed outside of building. Any regulators connections. inside the buildings must be properly vented to the outside. Local, state and national codes always apply 2. Assemble the components together according to the to regulator installation. Natural gas regulators with figure. This view is to show general assembly of the vent limiting device may be mounted indoors without components only. venting to outdoors.
3. Tighten all connections securely. 7. All gas pressure regulators must be installed in strict accordance with the manufacturer’s safety 4. Check all connections for gas leaks using approved instructions. These instructions accompany each gas leak detectors. regulator.
5. The heater must have the proper gas regulator 8. Any heater connected to a piping system must have an installed for the application. A regulator must be accessible, approved manual shut off valve installed connected to the gas supply so that gas pressure at within six feet (6 ft.) of the appliance it serves. The the inlet to the gas valve is regulated within the range manual shut-off valve can be installed before the specified on the dataplate at all times. Contact the regulator, under the eave of the building, or after the L.B. White Co., Inc. if you have any questions. regulator inside the building.
REGULATOR
REGULATOR VENT NIPPLE
VALVE, MANUAL SHUT-OFF
GAS FLOW
GAS HOSE
ADAPTER
TO CONTROL SEDIMENT TRAP VALVE INLET
August 1999 2.6-11 Installation Instructions
Sediment Trap
Assemble the tee, nipples and cap together and tighten Make certain that a sediment trap is installed at the gas securely. The sediment trap assembly must always be valve inlet to prevent foreign materials (pipe compound, pipe mounted in a vertical position. Make sure pipe thread chips and scale) from entering the gas valve. Debris blown compound that is resistant to both L.P. gas and natural gas into the gas valve may cause a malfunction resulting in a is used in making all connections. Check all connections for serious gas leak that could result in a possible fire or gas leaks using approved gas leak detectors. explosion causing loss of products, building or even life. A properly installed sediment trap will keep foreign materials from entering the gas valve and protect the safe functioning of that important safety component.
Tee
5 in. Nipple 3 in. Nipple Gas Control Valve Inlet Cap
2.7-11 August 1999 Installation Instructions
Electrical Requirements
Strict attention must be given to the following areas before ATTENTION connecting the heater to its electrical supply.
■ The following is supplied for informational purposes ■ A properly installed three-wire electrical supply only. consisting of separate hot, neutral, and ground leads shall be connected to each electrical outlet that ■ All electrical wiring shall be accomplished by a supplies each heater. qualified electrician. ■ Proper voltage must be supplied to each heater. ■ Local and state codes must be observed at all times. -- Proper voltage is 115 V.A.C. ■ In absence of local or state codes, follow +10% (127 volts maximum) ANSI/NFPA70 National Electrical Code. - 15% (98 volts minimum)
-- Under voltage may cause:
* Low motor speed * High limit switch tripping * Burner flame cycling on/off * Control valve solenoid hums or does not open.
-- Over voltage may cause:
* Motor thermal overload tripping
■ A three-wire cord set (consisting of hot, neutral and ground leads) of proper wire gauge and desired length, must be obtained through local sources when connecting a remote mount thermostat to the heater.
August 1999 2.8-11 Installation Instructions
Remote Thermostat
Models 346/348, 377/379, 408/410 1. Disconnect the heater from its electrical supply and close all fuel supply valves to the inlet of the heater. 2. Locate the two wires labeled “power supply to thermostat” and “power return from the thermostat” within the heater’s electrical junction box.
Black Lead
7. Connect the white lead of the thermostat cord to the lead labeled “power return from thermostat”. Twist a wire nut onto the exposed lead conductors until tight. Pull the wire nut to make sure it is secure.
3. Remove the wire nuts from these two wires. Keep the wire nuts. White Lead 4. Remove the strain relief at the top of the junction box. Strain Relief
8. Attach the terminal on the end of ground wire to the ground screw located within the junction box.
Ground 5. Run the thermostat cord through the strain relief along Screw with the other wires that feed into the junction box. You will need a pliers to squeeze the strain relief and wire bundle together to allow installation of the strain relief back into the junction box.
6. Connect the black thermostat cord lead to the lead labeled “power supply to thermostat”. Twist a wire nut onto the exposed lead conductors until tight. Pull the wire nut to make sure it is secure.
2.9-11 August 1999 Installation Instructions
Remote Thermostat
Models 346/348, 377/379, 408/410 (Cont.) 4. Remove the electrical knock-out hole located directly above the bushing that the power cord is routed through. 9. Reconnect the heater to its electrical supply and open Install a two-screw squeeze connector into this hole and the fuel supply valves to the inlet of the heater. route the cord through the connector. Tighten the connector screws after allowing sufficient lead length to 10. Light the pilot. Turn the thermostat up above room reach the terminal strip. temperature so the motor starts and main burner ignites. Check the heater for proper operation.
11. Install the junction box cover plate. Tighten the plate screws securely. Knockout 12. Set the thermostat to desired temperature. Model AS040 1. Disconnect the heater from its electrical supply and close all fuel supply valves to the inlet of the heater. 2. Remove the motor access panel located on the back of the case assembly.
5. Route the thermostat cord leads through the bushing near the enclosure’s base.
Bushing
3. Remove the electrical enclosure cover. 6. Loosen the screws on the terminal strip that hold the jumper in place. Remove the jumper. (continued on following page)
Jumper
August 1999 2.9-22 Installation Instructions
Remote Thermostat
Model AS040 (Cont.) Model AB200 and AB250
7. Attach the ground lead terminal to the ground screw in 1. Disconnect the heater from its electrical supply and the enclosure. close all fuel gas valves to the inlet of the heater.
2. Open the burner access door to locate the heater’s electrical enclosure. Remove the cover from the enclosure.
Ground Lead
8. Push the exposed conductors of the power supply and return leads beneath the terminal strip screw plates previously occupied by the jumper. Tighten the screw 3. Remove the hole plug from the thermostat cord entry plates and tug on the leads to make sure the leads are hole near the power cord at the front of the case securely attached. assembly.
4. Run the thermostat cord through this hole and through the bushing in the base of the enclosure. 9. Reconnect the heater to its electrical supply and open the fuel supply valves to the heater.
10. Check the heater for proper operation. Light the pilot and set the thermostat so the fan motor starts and the main burner ignites.
11. Disconnect the heater from its electrical supply. Reinstall the electrical enclosure cover and the fan access panel. Reconnect the heater to its electrical supply. Set the thermostat to desired temperature.
2.9-33 August 1999 Installation Instructions
Remote Thermostat
Model AB200 and AB250
5. Secure the cord in place at the entry hole on the case 7. Push the exposed conductors of the power supply and front with the strain relief provided in the thermostat kit. power return leads beneath the terminal strip screw plates previously occupied by the jumper. Tighten the screw plates and tug on the leads to make sure the leads are securely attached.
6. Loosen the terminal strip screws that hold the jumper in place. Remove the jumper. 8. Attach the ground lead terminal to the ground screw in the enclosure.
9. Reconnect the heater to its electrical supply and open the fuel supply valves to the heater.
10. Light the pilot. Set the thermostat so the fan motor starts and the burner lights. Check the heater for proper operation.
11. Set the thermostat to the desired temperature. Reinstall the electrical enclosure cover.
August 1999 2.9-44 Installation Instructions
Hanging Instructions
1. Assemble according to the illustration and tighten all 2. Make sure the heater is properly positioned before eyebolts securely. use and is hung level. Observe and obey all minimum safe distances of the heater to the nearest combustible materials. Minimum safe distances are given on the heater dataplate.
3. See figure for typical indoor installation. In any animal confinement building, consideration must be given to making sure the heater is located away from the livestock so that livestock cannot knock the heater, tear it loose from its mounting, or damage the heater, its power supply cord, or its gas supply line in any way. Make sure you observe and obey minimum clearance distances to combustible materials as stated in the specification section of this owner’s manual and on Cage Nut the heater itself.
CHAIN OR CABLE
OPTIONAL INDOOR REGULATOR MOUNTING LOCATION
BLACK PIPE GAS HOSE THROUGH WALL
THERMOSTAT VENT LINE CORD
WALL OUTLET
HEATER WALL
YOKE POWER CORD
SEDIMENT 30.5CM12 IN. See THERMOSTAT Spec. TRAP 30.5CMTables
2.10-11 August 1999 Installation Instructions
Air Diverters
Depending on model number, two designs of air diverters a. The air diverter’s notched tabs on each half will may be available for your heater. The air diverters allow the pop into the blower outlet between the inside of hot discharge air to be blown out either in two 45 degree the case assembly and the blower housing outlet. paths or in one direction only (two-piece diverter kit only). If the notched tabs do not pop into the blower Either way promotes good air movement and circulation. outlet, loosen (do not remove) the blower outlet screws. Doing this provides a gap into which you Two-PPiece Air Diverter can insert the tabs.
1. Install the air diverter as follows. This is a typical b. The air diverter halves are installed so the notches procedure for all heaters. Appearance of the outlet on in the tabs are up against the formed guard of the heater may vary from model to model. blower outlet.
c. Tighten blower outlet screws.
Diverters Pointed Both Left and Right Diverters Pointed in One Direction
August 1999 2.11-11 Installation Instructions
Air Diverters
One-PPiece Air Diverter
1. Loosen the four blower outlet screws. 3. Push down on the diverter to lock it into position. Tighten the outlet screws.
2. Align the keyhole slots in the mounting flanges with each outlet screw. ATTENTION
Larger design air diverters for Models 377/379, 408/410, and AB200 heaters incorporate holes in the “Y” of the Keyhole Slots assembly to allow ease of mounting to the heater outlet.
2.11-22 August 1999 Operation Instructions
Start-Up and Shut-Down Instructions
Start-UUp Instructions Determine the pilot control valve type supplied on the heater. 8. Connect the heater’s power cord to an approved For heater with gas control valves with an internal low electrical supply. pressure regulator and gas shut off, refer to Section A. 9. Set the thermostat above room temperature. The For heaters with gas control valves without an internal low heater will light. pressure regulator and gas shut-off, refer to Section B. 10. Reset the thermostat to desired room temperature. Follow all procedures within the appropriate section on initial start-up after heater installation by qualified gas heater SECTION B Control Valves without Internal service person. For normal start-up simply turn the Low Pressure Regulator and thermostat above room temperature. The heater will start. Gas Shut-OOff (Part 500-002309)
ATTENTION ■ On new installations it may take about a minute for the gas to purge out any air in the pilot line before the pilot stays lit. Pilot SECTION A Control Valves with Internal Button Low Pressure Regulator and Gas Shut-OOff
Knob
Pilot Button 1. Open all manual fuel supply valves to the heater and check for gas leaks using approved leak detectors. 2. Fully depress the pilot button while applying flame to the pilot burner. 3. Keep the button depressed for about 30 seconds to allow the thermocouple to warm so the pilot stays lit 1. Open all manual fuel supply valves and check for gas after the pilot button is released. leaks using approved leak detectors. 2. Remove the metal cover from the control enclosure (if ATTENTION applicable). ■ The red cap protecting the pilot control may become 3. Position the indicator arrow on the control valve’s stiff in colder temperatures. shut-off knob to “pilot”. ■ Remove the cap and fully depress the pilot button to 4. Fully depress the pilot button while applying flame to light the pilot. Reinstall the cap. the pilot burner.
5. Keep the button depressed for about 30 seconds to 4. Connect the heater’s power cord to an approved allow the thermocouple to warm up so the pilot stays electrical supply. lit after the pilot button is released. 5. Set the thermostat above room temperature. The 6. Position the knob to “on”. heater will light. 7. Reinstall the metal cover (if applicable). 6. Reset the thermostat to desired room temperature.
August 1999 3.1-11 Operation Instructions
Start-Up and Shut-Down Instructions
Shut-DDown Instructions
If the heater is to be shut down for cleaning, maintenance, or 3. If applicable, turn the control valve knob to “Off”. repair, follow steps 1 through 5. Otherwise, simply turn the thermostat to “Off” or “No Heat” for standard shut down. 4. Turn thermostat to “Off” or “No Heat” position.
1. Close all manual fuel supply valves. 5. Disconnect the heater from its electrical supply.
2. With heater lit, allow heater to burn off remaining fuel in gas supply hose.
3.1-22 August 1999 Operation Instructions
Variable Heat Output
1. Some models of propane (LP) gas or natural gas 2. The throttle valve can be adjusted to deliver either heaters have a throttle valve for varying heat output minimum heat or maximum heat. Become located between the gas control valve and gas familiarized with the design of the throttle valve in your manifold assemblies. THIS IS NOT A MANUAL GAS heater. Refer to the illustrations below to determine SHUT OFF VALVE. valve location and how to adjust the heat output.
MAXIMUM HEAT
Handle 90% OF MAXIMUM Parallel Handle 75% OF MAXIMUM Turned 90º HEAT MINIMUM
MANIFOLD EC D RE AS E I N C R E A SE
August 1999 3.2-11
Preventative Maintenance
Periodic Inspection
1. The area surrounding the heater shall be kept clear regulators installed and check delivery pressures to and free from combustible materials, gasoline, and the appliance to make sure that the regulator is other flammable vapors and liquids. reliable.
2. Have your gas supplier check all gas piping annually 5. Check all wiring associated terminals and electrical for leaks or restrictions in gas lines. Also, at this time components within the heater for corrosion, frayed or have your gas supplier clean out the sediment trap of cut insulation, tight connections, etc. Repair or any debris that may have accumulated. replace as necessary.
3. Regulators must be periodically inspected to make 6. Review all heater markings (i.e. wiring diagrams, sure the regulator vents are not blocked. Debris, warnings, start-up, shut-down, troubleshooting, etc.) insects, insect nests, snow, or ice on a regulator can at the time of maintenance for legibility. Make sure block vents and cause excess pressure at the none are cut, torn, or otherwise damaged. Any appliance. damaged markings must be replaced immediately by contacting the L.B. White Co., Inc. Dataplates, start- 4. Regulators can wear out and function improperly. up and shut-down instructions and warnings are Have your gas supplier check the date codes on all available at no cost. A nominal charge will be applied for wiring diagrams, and troubleshooting markings.
August 1999 4.1-11 Preventative Maintenance
Cleaning Instructions
WARNING Fire, Burn, and Explosion Hazard ■ This heater contains electrical and mechanical components in the gas management, safety and airflow systems. ■ Such components may become inoperative or fail due to dust, dirt, wear, aging, or the corrosive atmosphere of an animal confinement building. ■ Periodic cleaning and inspection as well as proper maintenance are essential to avoid serious injury or property damage.
1. Before cleaning, shut off all gas supply valves and b. At least once a year, give the heater a thorough disconnect electrical supply. cleaning. At this time, remove the fan and motor assembly and brush or blow off the fan wheel, 2. The heater should have dirt or dust removed giving attention to the individual fan blades. periodically: Additionally, make sure the burner air inlet venturi ports and the throat of the casting are free of dust a. After each flock or between building re-population, accumulation and the area between the heat give the heater a general cleaning using chamber top and inside case is also free of dust. compressed air or a soft brush on its interior and exterior. At this time, dust off the motor case to c. Observe and obey all instructional warnings prevent the motor from over-heating and shutting pertaining to cleaning procedures located on each the heater down. heater.
4.2-11 August 1999 Troubleshooting Instructions
Troubleshooting Guide
READ THIS ENTIRE SECTION BEFORE To effectively use these flow charts, you must first identify BEGINNING TO TROUBLESHOOT PROBLEMS. the problem. The problems are numbered sequentially, along with a brief explanation of each problem. Start at the “diamond” closest to the identified problem and proceed WARNING with each step, performing the suggested tests. After each Electrical Shock and Burn Hazard step or test, the guide will direct the service person to the ■ next logical step based on the outcome of the previous Do not attempt to service or repair this heater unless check. you are a properly trained and qualified gas heater service person. The problems are listed below along with the page number ■ Troubleshooting this system may require operating the on which you may find the flow chart for the specific unit with line voltage present and gas on. Use extreme problem. caution when working on the heater. Problem Description Page ■ Failure to follow this warning may result in property 1 Pilot will not light 5.1-3 damage, personal injury or death. 2 Pilot will not stay lit when pilot control The troubleshooting flow charts in this section provide button is released 5.1-4 systematic procedures for isolating heater problems. Refer to the Component Testing section of this Service Guide for 3 Motor runs. Burner does not light with general instructions on performing voltage and continuity pilot light lit. 5.1-5 checks as well as evaluation of specific components as indicated by these charts. Refer to the appropriate wiring 4 Motor does not run, heater does not light diagram for assistance in performing voltage and continuity with pilot light lit. 5.1-6 checks. Refer to the Service section for gas pressure checks and adjustments as indicated by the flow charts. 5 Main burner cycles on and off repetitively. Pilot stays lit. 5.1-7 TEST EQUIPMENT REQUIRED 6 Pilot will not stay lit when main burner The following pieces of test equipment will be required to and blower are operating. 5.1-7 troubleshoot this system with minimal time and effort. 7 High limit switch is open. 5.1-8 • Digital Multimeter - for measuring voltage and resistance. 8 Burner does not shut off. 5.1-9 • Thermocouple Test Kit - (L. B. White Part No. 500-08506) When used with a standard digital multimeter, this kit 9 Flame “lifting” off of burner. 5.1-9 allows testing of the power unit of the pilot safety control and thermocouple on pilot ignition systems. 10 Burner flame drops out after 10 - 15 minutes of operation. 5.1-9 • Low Pressure Gauge - (L.B. White Part No. 550-00764) for checking inlet and manifold pressures of the gas control 11 Gas control valve “chatters”. 5.1-10 valve against dataplate rating. 12 Motor “hums”. 5.1-10 INITIAL PREPARATION 13 Heater is not delivering proper air flow 5.1-11 ■ Visually inspect heater for apparent damage. 14 Heater is not delivering proper heat output 5.1-11 ■ Check all hoses for abrasion and wear. Replace any that are suspect. Components should be replaced only after each step has been completed and replacement is suggested in the flow ■ Make sure heater is properly installed and meets chart. Refer to the Servicing sections as necessary to obtain minimum clearances to nearest combustible materials. information on disassembly and replacement procedures of (Refer to dataplate on heater.) the component once the problem is identified by the flow chart. ■ Check all wiring for loose connections and worn insulation. Additionally, a series of illustrations has been provided on the following page to identify typical problems based upon pilot flame appearances. August 1999 5.1-11 Troubleshooting Instructions
Troubleshooting Pilot Flame
ATTENTION
■ These illustrations are intended to provide a means to ■ With any pilot light assembly, always make sure the assist you in troubleshooting a pilot problem. They thermocouple is completely installed within the pilot must be used in conjunction with proper cleaning, bracket by either its mounting clip or nut. checking for proper gas pressures, etc. 1. Correct Flame 4. Wavy Blue Flame
Check for: * Excessive drafts 3/8 in. to 1/2 in. * Pilot shield loose
Pilot flame Thermocouple spreader head
2. Noisy, Lifting Flame 5. Hard, Sharp Flame
Check for: Check for: * High gas pressure * High gas pressure * Improper orifice * Improper pilot * Partially plugged orifice pilot orifice or dirty pilot assembly
3. Lazy, Yellow Flame 6. Small, Blue Flame
Check for: Check for: * Partially plugged * Improper pilot orifice pilot orifice or pilot * Low gas pressure tubing * Partially plugged pilot * Low gas pressure orifice or * Dirty pilot assembly pilot tubing
5.1-22 August 1999 Depress pilot to bleed button off the air until pilot lights. (Normally 30 - 45 seconds.) Ye s No the gas line? Is there air in heater. Adjust as pressure to inlet of Check for proper fuel for Check Ye s No Is the used? Replace pilot correct pilot orifice installed blow out with blow for the fuel being for Remove these Remove compressed air. components and Ye s Ye s No No Is Is the there a orifice? pilot button. button fully button pilot control depressed? tube or pilot Fully depress the restriction in gas supply hose, pilot supply hose, Ye s No open? Are all fuel supply valves Open all supply valves. Ye s No Is or tank full? LP gas cylinder Fill container if low. lem 1 ob Pilot will not light. Pr August 1999 5.1-33 Problem 2 5 . 1 -4
4 Pilot will Did Is Did you Is not stay lit you allow Is Is LP thermocouple check for dirt or thermocouple when pilot gas supply Ye s sufficient time to Ye s Ye s debris between Ye s properly positioned Ye s pilot assembly, Ye s allow thermocouple contact nut thermocouple contact including orifice, control cylinder tank warm up? and electromagnet in pilot button is full? tight? of valve? bracket? clean? released.
No No No No No No
Fill container if low. Allow 30 - 60 seconds Snug nut in place. (Do Check for debris Pilot flame should Disassemble and warm up before releasing not overtighten.) between contact of impinge on 3/8 - 1/2 in. clean with pilot button. thermocouple and of thermocouple tip. compressed air. Do electromagnet of valve. not use pointed instruments. Replace pilot orifice if
Are pilot line or gas supply Ye s Remove and clean hose partially with compressed air. plugged?
No
Is Has Has drop proper gas Ye s Is proper pilot Ye s thermocouple Ye s out of safety magnet strength been pressure supplied orifice installed? on pilot control been to heater? checked with tester? checked?
No No No
No Check for proper Replace with proper Check millivolt output. 10 August 1999 pressure to heater pilot orifice. MV or greater is acceptable. Check millivolt dropout. 4 MV or less inlet. Refer to Replace thermocouple if is proper. Over 4 MV is weak valve. heater nameplate. less than 10 MV (with Replace entire valve. burner off). Ye s No Is shaft? fan tightened fan to motor shaft. properly to motor Tighten set screws Repair or replace flapper. Ye s Ye s No No Is binding? Is flapper flapper arm arm properly? (if applicable) (if applicable) (if applicable) engaging switch Adjust flapper arm to flapper or air flow switch. flapper or air flow out any debrisout any from around engage switch arm or clean engage switch Ye s If proper gas pressure is supplied to the burner but inlet of the gas control valve, pressure is not apparent, then manifold replace the control valve. Ye s No check.) Are air proving Are air proving No switch or centrifugal switch (Perform a continuity (Perform switch, replace motor. switch, and closing properly? switch contacts opening switch Have Replace air proving switch Replace air proving or for units with centrifugal or for you checked checked you for proper inlet and for at gas control valve? burner manifold pressure burner manifold Check for proper pressure for Check Refer to heater nameplate. Refer using low pressure gas gauge. using low Ye s Reset switch. (See Problem 7.) (See Problem high limit tripping. Determine cause of Ye s Clean out debris. Ye s Ye s No switch? necessary. No No No delivered to the delivered Are switch and wires for and wires for switch switch continuity. Repair as valve? burner Check voltage supply, supply, voltage Check tripped? is proper voltage being is proper voltage electrical connections to plugged? For units with air proving units with air proving For Is high limit switch or centrifugal switch, or centrifugal switch, switch from high limit orifice, burner supplied to and switch to control switch Is proper voltage casting or manifold Check electrical connections Check and check wires for continuity. wires for and check to high limit switch and to control valve to high limit switch lem 3 ob Motor runs. Burner does not light with pilot light lit. Pr
August 1999 5.1-55 5 . 1 -6 6
Problem 4
Motor does Do Is not run, Is Is Is thermostat heater proper voltage Ye s thermostat set Ye s proper voltage Ye s contacts “open and Ye s proper voltage Ye s Is fan Ye s supplied to above room supplied to close”? (Perform supplied to wheel binding? does not heater power temperature? thermostat? continuity motor? light with cord? check.) pilot light lit. No No No No No No
Defective motor. Provide proper voltage. Set thermostat above Check electrical Defective thermostat. Are Replace. See heater nameplate. room temperature. connections to thermostat Replace. electrical Check circuit breaker and power cord. connections to in electrical system. motor installed properly?
No Repair, condition or replace fan Repair or replace wheel. wires and connections. August 1999 August 1999
Problem 5 Main burner cycles on Is Air proving Readjust flapper arm. and off outlet of heater Ye s switch arm is repetitively. free from out of Bend arm up slightly with Pilot stays blockages? adjustment. needle nose pliers. lit.
No
Remove blockages.
Problem 6
Pilot light will not Is pilot shield (and Have you checked for stay lit Ye s gasket, if applicable) in proper fuel use and inlet when main proper position and tight gas pressure? burner and against burner? blower are operating.
No No
Check for proper Tighten pilot shield pressure. Make sure screws to close gap proper fuel is being used between shield and for appliance installed. orifice. Make sure gasket (if applicable) is positioned properly. 5 . 1 -7 7 5
. Problem 7 1 -8 8 Tighten fan wheel set High limit screw(s) to motor switch is Ye s Is fan loose shaft. Blow fan with open. or dirty? compressed air or clean with soft brush.
No
Are there restrictions Is heater at air inlet or reasonably Ye s Ye s outlets (such as Remove restriction. clean? unapproved ductwork)? No
Give heater a No thorough cleaning with a soft brush or compressed air. DO NOT USE WATER Is On heaters without OR ANY LIQUID proper voltage Ye s air proving switch, is Ye s Ye s CLEANING AGENTS. being supplied motor overheating Is motor dirty? Clean motor housing. to motor? and shutting down?
No No
No Check building electrical Motor is defective. system. Repair as Replace. necessary. See heater nameplate for correct voltage. Have you checked for proper gas type being used, pressure or for liquid propane in line? August 1999
No
Check for proper fuel and pressure on nameplate of heater. Correct as necessary. August 1999 Problem 8 Burner does not shut Does Debris is lodged thermostat shut in seat of gas off when Ye s control valve. temperature off within ± 3° F. of set point? Replace entire requirement valve. is satisfied.
No
Replace thermostat.
Problem 9 Flame “lifting” Has gas Are there blockages in off of Ye s Ye s pressure been burner casting, burner orifice or Clean with compressed air. burner. checked? primary air inlets of casting?
No
Check for proper pressure to inlet of heater and also for proper burner manifold pressure.
Problem 10
Burner Is flame drops gas supply out after line and tank Ye s See problem 3 and 6. 10 - 15 properly minutes of sized?
No 5
. Resize line and reselect 1 -9
9 larger tank size if necessary. 5
. Problem 11 1 -1 1
0 Gas control Is proper voltage Defective gas control valve to gas control Ye s Has proper gas Ye s valve solenoid. pressure been “chatters”. valve being Replace entire valve. supplied? verified?
No No
Check for proper voltage. Check for proper inlet and See heater nameplate. burner manifold pressure. Have qualified electrician correct if necessary.
Problem 12 Are Motor wires Reconnect wires. “hums”. disconnected Ye s between motor Test for proper and capacitor? operation.
No
Defective motor or capacitor. Replace. August 1999 August 1999 Problem 13
Heater is Ye s Remove blockage(s). Is blower outlet not blocked? Clean heater as necessary. delivering proper air flow. No
Is heater receiving proper Ye s voltage from power supply? Defective motor or capacitor. Replace motor. (check heater dataplate.)
Problem 14
Heater Is the gas control valve Is burner is not receiving proper inlet Ye s orifice or casting Ye s Clean with soft brush, dry delivering pressure and delivering plugged with dust cloth or compressed air. proper outlet pressure? or debris? proper heat output.
(1) Some thermocouples use a retainer clip to secure the thermocouple into the pilot bracket. Make sure the thermocouple is pushed up completely into the hole so clip on thermocouple holds it securely within the bracket. Other thermocouples use a retainer nut to hold the thermocouple in place. Make sure the nut is securely tightened. 5 . 1 -1
1 (2) With any electrical problem, all wiring should be checked for good connections and proper voltage and repaired if a problem is found. 1
Voltage Checks
Procedure Checking for voltage supply to high limit switch.
Testing for voltage at any of the components is a relatively Apply the probe to the power input side of the limit switch easy procedure. The following illustrates how to check and the other to ground. Voltage will appear after the air voltage at some of the components used in the heater. proving switch makes.
Warning Electrical Shock Hazard ■ Troubleshooting may require the heater to be connected to its electrical supply.
■ Do not directly touch exposed terminal connections when checking voltage. Use only the insulated probes of the voltage tester.
■ Failure to follow this warning may result in electrical shock leading to personal injury.
First, set the function selector switch of the tester to “AC” (alternating current). Check for voltage at either the ignition module or the individual component. To test, place one of your tester probes at the “hot” power supply terminal of the component being tested and the other probe to a grounded portion of the heater’s cabinet. (Normally, a sheet metal Checking for voltage supply to gas control valve screw on the cabinet will serve this purpose.) Or, place your from the high-llimit switch. probes across the terminals of component being tested. The following are some examples showing both procedures: Apply one probe to female terminal at end of gas control valve wire and the other to ground. You will see voltage Checking for voltage supply to motor. appear, proving the air proving switch, high-limit switch, and respective wires are in order. Apply a tester probe to the end of the black motor wire and the other probe to ground. When the thermostat calls for heat, you will see approximately 120 volts readout on the meter display. This verifies the thermostat is supplying voltage and the wiring between the thermostat and the motor is in good condition.
Motor Wire
August 1999 6.1-11 Component Testing
Continuity Checks
Continuity Checks High Limit Switch
Equipment required:
Digital Volt/Ohm Meter
Explanation:
In a continuity test, you simply want to determine whether or not an electrical pathway exists through a component. For these tests, it is important that the probes of the multimeter make good contact with the part being tested. They should touch bare metal or wire, not insulation, paint, or dirt. Typically, components which show an open circuit and are Alligator clips make firmer contact than needle probes, use not in proper working order will exhibit an “overload” readout them where possible. on the display of the multimeter. These components should be replaced. However, some components such as an air Also, manipulate wires to see if they are loose to help proving switch have a set of normally open contacts. To uncover loose connections. verify proper operation, the switch arm needs to be pushed upward or the flapper lifted so the contacts are engaged. At The components which exhibit good continuity within the this point an ohm reading should appear. electrical circuit also provide a resistance to the flow of electricity. The resistance is measured in ohms and will be Air-PProving Switch displayed on the meter. You do not need to remove the components to check for continuity. The following illustrates how to check for continuity for some of the components used in the heater. Attention
Make sure that the heater is disconnected from its electrical source before conducting this procedure. Failure to do so will result in damage to your meter. Procedure
First, set your meter to the continuity scale (if provided) or the ohm(s) scale. Place the tester probes on the terminals of the component being tested. If your meter has an audible To check for proper thermostat operation, connect the continuity feature you will hear a “ringing” sound in addition testing probe to the thermostat terminals as shown. When to seeing a read out in ohms. Examples of checking for the thermostat contacts are open, the meter will show an continuity on several components are shown. open circuit. When the thermostat is adjusted to call for heat, the contacts should close and you will see an ohm readout appear on the tester indicating that there is a completely closed electrical circuit through the thermostat.
6.2-11 August 1999 Component Testing
Continuity Checks
Thermostat Attention
■ Many thermostats can be wired to open or close on an increase in temperature.
■ Make sure the thermostat is wired properly so the contacts close when the thermostat is set to a point above room temperature and open when the temperature is achieved. This will allow the heater to cycle accordingly.
■ Refer to the heater wiring diagram or the wiring diagram applied to the inside of the thermostat cover for proper connection.
August 1999 6.2-22 Component Testing
Thermocouple and Power Unit Tests
PILOT Equipment Required: BURNER THERMOCOUPLE Volt / Ohm Meter with DC Scale
Thermocouple Test Kit, Part Number 500-08506 POWER UNIT THERMOCOUPLE COIL The thermocouple is used in conjunction with the pilot safety LEAD control valve in supplying pilot gas to the pilot orifice. Here is How it Works: SAFETY VALVE A thermocouple converts heat energy into electrical energy. PLUNGER When the tip of the thermocouple is properly positioned in the pilot flame, the temperature difference between the hot and cold junction generates a small amount of electrical If the pilot flame is extinguished, or is too small to reliably energy in the form of direct current (DC) which is fed into the heat the thermocouple, the DC output being generated spring-loaded power unit within the control valve. The drops below the minimum level required to hold the power current holds the power unit open to allow gas to be fed to unit open. The spring within the power unit pushes down the the pilot orifice. safety valve plunger, thereby discontinuing the flow of gas to the pilot and main burner.
MOUNTING If pilot outage problems are occurring, there are several COLD CLIP OPTIONAL JUNCTION ATTACHMENT steps that you must complete before assuming the NUT thermocouple, or the pilot safety control valve are defective. These are as follows:
HOT JUNCTION ■ Check inlet pressures to the control valve to make sure CURRENT CONDUCTORS THERMOCOUPLE INSULATED WIRE the pressure is within parameters specified on the CONNECTOR NUT COPPER TUBING heater’s dataplate. POWER UNIT CONNECTOR CONTACT ■ Clean the pilot assembly components, or if necessary, replace the pilot orifice if it is plugged.
■ Insure that dirt is not located between the As long as the pilot gas stays lit and the pilot flame is thermocouple’s power unit contact and power unit directed to the thermocouple, the thermocouple will within the safety control valve. continue to create the small amount of electrical energy ■ necessary to keep the power unit open. The following Insure that the thermocouple is properly positioned illustration shows the electrical circuit of the thermocouple within the pilot burner bracket, that the pilot flame with its relationship to the pilot safety control valve. envelopes the thermocouple’s tip and the thermocouple’s contact is snugged at the gas control valve. (Tighten finger tight plus 1/4 turn.)
■ The pilot shield must be tight against the burner casting.
■ The pilot gasket (if applicable) is properly installed between pilot shield and casting.
■ If these items are satisfactory, then proceed to check both the DC output strength of the thermocouple and drop-out strength of the electromagnet within the power unit of the pilot safety control valve.
6.3-11 August 1999 Component Testing
Thermocouple and Power Unit Tests
Testing Procedures: C. THERMOCOUPLE CHECK (Applies to all thermocouples and gas control valves.) 1. Light the pilot. A. INITIAL PREPARATION 2. Set your voltage tester to the DC scale, and if the tester 1. Disconnect the heater from its electrical supply. is so equipped, set the scale to MV (millivolts). Connect the probes of multimeter to the millivolt tester. 2. Close the fuel supply valves to the inlet of the heater. B. TEST KIT INSTALLATION
1. Remove the thermocouple contact from the control valve.
Thermocouple Contact 3. Observe the DC voltage reading. The reading should rise to at least 10 millivolts DC before leveling off. If the reading never reaches 10 millivolts, discontinue the test at this point and replace the thermocouple. Start the test over. If the reading is 10 millivolts or greater, 2. Thread the contact nut of the tester into the control and the pilot stays lit, discontinue the test and remove valve and tighten finger tight plus 1/4 turn. the test kit. Reinstall the thermocouple. 4. Reconnect the heater to its electrical supply. D. POWER UNIT CHECK
1. Close the fuel supply valve to the heater and allow the pilot flame to be extinguished. Tester 2. Monitor your meter reading. The millivolt reading will drop slowly as the thermocouple cools.
3. Thread the heater’s thermocouple into the tester and tighten finger tight plus 1/4 turn.
Heater Thermocouple to Tester 3. Listen for the “snap” as the power unit within the control valve drops out (releases) normally within 30 - 60 seconds after pilot flame is extinguished. 4. If the millivolt reading is 4 millivolts DC or greater when the valve drops out, the power unit within the control valve is weak. The control valve must be replaced in its 4. Open the fuel supply valves to the heater. entirety. August 1999 6.3-22 Component Testing
High Limit Switch Tests
Method of Test:
Disconnect the heater from its electrical supply before conducting this test.
Remove the switch from its location. Hold the switch by one of its legs with a pliers and apply a small flame only to the sensing portion on the back side of the switch. Be careful not to melt the plastic housing of the switch when conducting this test. Within 1 minute, you should hear a “pop” coming from the switch which indicates the electrical contacts have opened.
Let the switch cool down for about 10 - 20 seconds before firmly pressing the reset button on the switch. Check for continuity across the terminals of the switch to make sure the contacts are closed.
Reinstall the switch into the heater and reconnect heater to its electrical supply.
ATTENTION
Model AB200 heaters incorporate a high limit switch with a sensing capillary. To test this switch, run a small flame back and forth along a 6 inch section of the capillary. Within 1 minute the electrical contacts of the switch should open. You may leave the switch in mounted position to perform the test.
6.4-11 August 1999 Wiring Diagrams
Electrical Connection and Ladder Diagram
The wiring diagram on the following page is provided to give the qualified service person information on the CAUTION interconnection and sequence of operation of the electrical Refer to the heater’s electrical connection diagram when components of various models of L.B. White pilot ignition servicing to avoid wiring errors and heater malfunction. heaters. Check for proper operation after servicing.
The wiring diagram is generic in its design and is suitable for all models and designs of L.B. White pilot ignition heaters. Its The part number of the wiring diagram is 150-20994. purpose is to show the flow of electricity through electrical components, whether or not the particular model which is ATTENTION being serviced utilizes a terminal block, terminal strip, or wire nuts in making the connections. If any of the original wire as supplied with the heater must be replaced, it must be replaced with wiring material having a temperature rating of at least 302° F. (150° C.)
August 1999 7.1-11 Electrical Connection and Ladder Diagram
Wiring Diagrams
Used on: Model Design Sequence All All
WARNING: THIS HEATER MAY START AT ANY TIME
AIR PROVING SWITCH (NOT SUPPLIED ON SOME MODELS) BLACK OR RED BLACK
BLACK OR RED BLACK BLACK GAS CONTROL WHITE VALVE
THERMOSTAT (OPTIONAL)
HIGH LIMIT SWITCH JUMPER
BLACK BLACK (REMOVE TO ADD THERMOSTAT) BLACK BLACK MOTOR WHITE POWER WHITE GREEN CORD
GROUND NOTE: IF AIR PROVING SWITCH IS NOT SUPPLIED, POWER IS SENT DIRECTLY TO HIGH LIMIT SWITCH. SEE "DASHED" LINE. ELECTRICAL CONNECTION DIAGRAM NEUTRAL GROUND
THERMOSTAT
MOTOR
HIGH LIMIT SOLENOID SWITCH AIR PROVING SWITCH ELECTRICAL LADDER DIAGRAM IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 302O F (150O C).
7.1-22 August 1999 Servicing Instructions
Component Identification and Function
All components must work together for proper heater determine what malfunction has occurred. Before you start operation. However, as with anything electrical or troubleshooting, it’s a good idea to understand the mechanical, problems may arise which will require you to components in their appearance and purpose.
Main Operational Components
A. Air Proving A stainless steel flapper (sail) located Flapper in the blower outlet that upon an increase in air pressure generated by the fan and motor, lifts and pivots upward and engages the air proving switch arm, thereby closing the switch contacts, establishing that the motor is up to full speed and sufficient airflow is present.
B. Air Proving Safety device that proves that proper Switch motor speed and airflow is being achieved before the gas control valve is opened.
C. Burner A device designed for the burning of gas or a gas/air mixture in the combustion zone.
D. Burner Orifice Metering device which is drilled to a specific diameter to allow a volume of gas to be fed through the burner at the stated manifold pressure (see dataplate) to achieve proper heat output.
August 1999 8.1-11 Servicing Instructions
Component Identification and Function
E. Fan Housing An assembly composed of the motor, fan wheel and housing for purposes of pulling air through the heater and discharging heated air into the room.
F. Fan May be of blade or wheel designs depending on heater model. Used in conjunction with the motor and fan housing to pull hot air from the heater and blow it into the room for heating purposes.
G. Gas Hose Flexible connector used to convey gas from gas supply line on building to heater.
H. Heat Chamber Metal “fire box” which is used to support the burner and fan assemblies while at the same time providing an area where combustion of gas occurs.
8.1-22 August 1999 Servicing Instructions
Component Identification and Function
I. High Limit Switch A manually resetable temperature activated switch. Its purpose is as a safety device wired into the control system to sense when an overheat condition occurs, either at the heat chamber or blower outlet. The switch “opens” the electrical circuit to the gas control thereby shutting off gas flow. The switch has a button located in its center that will need to be pushed in to reset the contacts if the contacts open due to an overheat condition.
J. Manifold Series of nipples or elbows that convey the gas from the outlet of the gas control valve to the burner orifice.
K. Motor An electrically powered device, located in the air housing, in conjunction with the fan wheel to circulate air in the confinement area.
L. Pilot Burner Bracket A small gas burner used to direct flame for igniting gas at the main burner and to heat the thermocouple.
M. Pilot Orifice Metering device used to supply gas for the dual purpose of igniting the main burner and heating the thermocouple.
August 1999 8.1-33 Servicing Instructions
Component Identification and Function
N. Pilot Safety A gas control valve which is held Control Valve open by electrical power supplied by a pilot generator and which closes automatically to shut off the flow of gas to the main burner when the pilot flame is extinguished or becomes too small to light the main burner. Additionally, it consists of electrical solenoids which are used for the control of gas flow to the main burner. Features of some gas controls are an internal low pressure regulator and gas shut off.
O. Shield A formed piece of metal that surrounds the pilot bracket to protect the pilot flame against drafts.
P. Regulator Mechanical devices used in gas distribution systems. Its purpose is to reduce a higher inlet pressure to a preset lower pressure. The regulator is responsible to supply a steady outlet pressure to the heater(s) despite changes in inlet pressure, heater demand, and weather conditions.
Q. Thermostat Electrical control which is basically used as an on/off switch that responds to changes in room temperature.
R. Thermocouple Thermoelectric device that converts heat energy into electrical energy. Works in conjunction with the power unit electromagnet within the gas control valve to provide gas to the pilot light.
8.1-44 August 1999 Servicing Instructions
Model AS040 Fan and Motor Cleaning the Fan:
1. Disconnect the heater from its electrical supply and 5. Clean the fan with a soft brush, rag, or compressed air. close all fuel supply valves to the heater.
2. Remove the motor access panel on the case back.
3. Disconnect the motor wires from the terminal strip.
4. Remove the screws that hold the motor mount to the heat chamber. Pull the fan and motor assembly from the heater.
Motor and Fan Replacement:
Follow steps 1 - 4 above and then proceed as follows: 3. To reassemble, reverse the procedures.
1. Using the appropriate allen wrench, loosen the set screw on the fan hub.
Hub
2. Remove the nuts that hold the motor to its mounting bracket.
IMPORTANT ■ Install the fan so its hub and set screw are pointed toward shaft end, away from motor. ■ Fan hub must be flush with end of motor shaft.
■ Position set screw of fan to flat of motor shaft Nut before tightening.
August 1999 8.2-11 Servicing Instructions
Model 377/379 Fan and Motor Cleaning and Replacing the Fan: 1. Disconnect the heater from its electrical supply and 5. Pull the fan wheel from the motor shaft. Use a wheel close all fuel supply valves to the inlet of the heater. puller if necessary. All L.B. White fan wheels incorporate a wheel puller groove on the fan hub to 2. Remove the access panel at the end of the heater assist in fan removal. opposite burner. 3. Remove the air inlet ring screws.
6. Clean the fan wheel using a soft brush, rag, or compressed air paying particular attention to individual fan blades to remove dirt build up.
4. Using the appropriate wrench, loosen the fan wheels set screw. Set Screw
Replacing the Motor Follow steps 1 - 5 above and then proceed as follows: 2. Pull the motor from the housing. To allow easier motor removal you may need to remove the thermostat or 1. Remove the four nuts that hold the motor to the junction box from the heater’s base. housing panel. 3. Disconnect the motor leads 4. To reassemble, reverse all procedures. IMPORTANT ■ Make sure that the fan does not rub on the inlet ring of the fan housing.
■ Make sure set screw(s) of fan are on flats of motor shaft when tightening. ■ Fan wheel to inlet ring spacing must be 1/8 in. before tightening fan to shaft. Nut
8.2-22 August 1999 Servicing Instructions
Models 346/348, 408/410, AB200, AB250 Fan and Motor Cleaning the Fan:
1. Shut off the gas supply to the heater and disconnect 4. Remove the screws that secure the motor mount plate the heater from its electrical supply. to the fan housing.
2. Open or remove the access panel on the end of heater 5. Lift and pull the motor and fan assembly from housing. opposite burner. 6. Clean the fan wheel using a soft brush, rag, or 3. Disconnect the motor leads. compressed air, paying particular attention to individual fan blades to remove dirt build up.
Motor and Fan Replacement: 4. To reinstall motor and wheel, reverse these procedures. Follow steps 1 - 5 above and then proceed as follows: 1. Loosen the set screw(s) on the fan wheel. IMPORTANT 2. Pull the fan wheel from the motor shaft. Use a wheel ■ Make sure that the fan does not rub on the inlet ring puller, if necessary. All L.B. White fan wheels of the fan housing. incorporate a wheel puller groove on the fan hub to assist in fan removal. ■ Make sure set screw(s) of fan are on flats of motor shaft when tightening. ■ Fan wheel to motor mount plate spacing must be at proper clearance before tightening fan to shaft. Refer to the following table and illustration. Model Clearance 346/348 1/4 in.
408/410 1/8 in. AB200, AB250 3. Remove the nuts that hold the mounting plate to the motor.
Nuts CLEARANCE
August 1999 8.2-33 Servicing Instructions
Air-Proving Flapper (Sail)
The flapper is located in the blower outlet. As discussed in gas valve opens. However, over a period of time, the flapper Section 9.1, Component Identification and Function, its may accumulate deposits of dust or dirt affecting its ability to purpose is to assist the air-flow switch in establishing proper pivot, thereby creating system failures. It then will be air pressure and, therefore, fan speed is achieved before the necessary to check this mechanism for operation.
Cleaning/Adjusting Procedure:
1. Disconnect the electrical supply and shut off gas to the 5. Using a needle nose pliers, gently bend up the arm of heater. the flapper (NOT THE SWITCH ARM) in increments until the sail arm engages the switch arm, closing the 2. Make sure the sail moves up and down freely. Check contacts of the switch when the sail body trailing edge for debris, burrs or housing alignment that would is 1 in. up off of housing bottom or rivet. cause the pivot points of the flapper to bind. Clean with a soft brush or compressed air if necessary.
3. The arm of the flapper should engage the arm of the switch when the trailing edge of the flapper body is lifted approximately 1 1/4 in. to 1 3/8 in. off the housing bottom or rivet (if supplied). At this distance you should hear an audible click which are the contacts closing within the switch.
4. If the switch contacts do not close within this distance, then manually push in the switch arm to make sure the switch is not defective. If a “click” is heard, normally the switch is good and the sail arm then needs to be Trailing Edge adjusted. (If in doubt, check for continuity.) Rivet
Replacing the Flapper:
If the flapper ever needs replacement, you will need to remove the fan and motor assembly from the housing. (See Section 6.2) You can now pull up on the main body of the flapper, thereby popping it from its mounting holes. To replace the flapper, bend the pivot point (opposite air-proving switch) down just enough so it allows the flapper to mount in the support holes. Once installed, push down with enough force nearest this pivot point to realign the pivot and the flapper body. Test the flapper to make sure that its arm engages the air-flow switch arm properly and that the contacts of the switch close within the prescribed distance.
8.3-11 August 1999 Servicing Instructions
Air-Proving Switch
For Units With Flapper: Make sure on reassembly that two nuts per screw are used as spacers between the switch and housing side 1. Shut off gas supply and disconnect heater from panel. These nuts are tightened securely against the electrical source. housing side panel. Slide the switch onto the screws and secure the switch in place using the two 2. Disconnect air-proving switch leads. remaining nuts.
3. Some models may have the air-proving switch mounting nuts located on the inside of the fan Two Spacer Nuts housing. Remove the motor and fan assembly from per Screw the housing. Remove the nuts and pull the switch and screws from the housing.
4. The replacement switch will ship with appropriate quantity of nuts and two screws. Mount the Flapper replacement switch so each mounting screw head is Arm located inside the fan housing with threads exposed to the switch side of the housing.
Screw Heads NOTE: When replacing the switch, make sure the arm of the switch is located above the flapper arm.
ATTENTION Flapper ■ Model 346 heaters do not include air proving devices.
■ Model AS040 heaters incorporate a centrifugal switch within the motor to prove that the motor as turning at proper speed before supplying power to the gas control valve. The centrifugal switch cannot be replaced. If it fails, replace the motor.
August 1999 8.4-11 Servicing Instructions
Pilot Assembly
4. Clean the pilot assembly using a soft brush or CAUTION compressed air. Allow the pilot assembly to cool before servicing.
1. Disconnect the heater from its electrical supply and close all fuel supply valves to the heater.
2. Open the burner end access door or remove the access panel.
3. Remove the screw(s) that secure the pilot assembly to the burner.
5. If necessary, use the appropriate wrench to loosen the pilot line’s compression nut at the orifice inlet and to remove the orifice from the pilot bracket. You may need to remove the pilot bracket from the burner to accomplish this.
Pilot Line Nut ATTENTION
Some models may require removal of a single wing screw which holds the pilot assembly to the burner.
Wing Screw
Orifice
8.5-11 August 1999 Servicing Instructions
Pilot Assembly
6. Pilot orifices may incorporate one or two holes, 8. Reverse these procedures to reinstall the orifice, pilot depending on design. Hold the orifice up to light to line and shield. make sure the orifice is clear of blockages. ATTENTION For Heaters so Equipped: Holes ■ Use care when servicing the pilot assembly to prevent damage to the pilot gasket.
■ Make sure the pilot gasket is properly positioned around the two vertical ribs on the face of the burner before reassembly. Failure to properly install the gasket will result in pilot outages.
■ Use the pilot assemblies’ threaded stud to assist in holding the pilot in position during reassembly.
7. If the orifice is plugged, blow out the orifice with compressed air or replace the pilot orifice if the blockage cannot be removed. IMPORTANT
■ The hole(s) in the pilot orifice are drilled to a specific size to match the fuel and gas pressure. Gasket Stud ■ Do not poke or push sharp instruments into the orifice hole(s). This may create pilot light outages or sooting. Burner Ribs ■ Do not use a pliers to remove the pilot orifice. Pliers will round off the hex nut on the base of orifice, creating difficulty in servicing later. Use only the appropriate size wrench.
■ Do not “kink” the pilot line when servicing. Doing so may reduce gas flow to the pilot orifice resulting in pilot outages.
August 1999 8.5-22 Servicing Instructions
Thermocouple
4. Remove the connector nut at the power unit on the gas CAUTION control valve. Allow the pilot assembly to cool before servicing.
1. Disconnect the heater from its electrical supply and close all fuel supply valves to the heater.
2. Remove the screw(s) that secure the pilot assembly to the burner. Nut
5. To reassemble, reverse these procedures.
6. Reconnect the heater to its electrical supply and open 3. Pull down on the thermocouple to disengage its the fuel supply valves to the heater. retaining clip from the pilot bracket, or loosen the attachment nut (if so equipped). 7. Light the pilot.
8. Start the heater and check for proper operation.
ATTENTION
■ The thermocouple is an important safety device which works directly with the pilot safety control valve. It should only be replaced with a thermocouple that has proper tip length to prevent pilot outages. See parts lists to order the appropriate thermocouple.
■ When threading the thermocouple’s connector nut back into the power unit on the pilot control valve, thread the nut in finger tight and then snug it in place with the appropriate wrench. DO NOT USE UNNECESSARY FORCE WHEN TIGHTENING, otherwise the power unit in the control valve may be destroyed.
8.6-11 August 1999 Servicing Instructions
Thermocouple
■ Do not use pliers when removing or tightening the ■ Insure the thermocouple is fully and firmly attachment nut or connector nut. Doing so will positioned in the pilot bracket by either its round off the nuts creating service problems. attaching nut or clip.
■ Insure dirt or debris has not fallen into the power ■ Do not make sharp kinks or bends in the unit prior to thermocouple installation. Dirt and thermocouple’s copper tube. Doing so may debris will block the electrical pathway of the damage the thermocouple. thermocouple, creating pilot outages.
August 1999 8.6-22 Servicing Instructions
High-Limit Switch Replacement
Very little actual servicing of the high-limit switch is required. thickness may vary with model and design. Refer to However, it is good to know the location of the switch when appropriate parts list. working on the heater. Typically, the switch is located on the heat chamber face or at another similar location at the Spacer burner end of the heater. Some models may have the switch located on a bracket near the burner.
Other heater designs may have the switch mounted directly to the flat of the heat chamber face. Familiarize yourself with switch mounting characteristics.
Without Spacer
Depending upon model, and design sequence, some heaters used a spacer between the legs of the high limit switch and the heat chamber. These allowed the switch to open at the proper temperature. If your heater is so equipped, insure the spacers are reinstalled prior to mounting the switch. Spacer
8.7-11 August 1999 Servicing Instructions
High-Limit Switch Replacement
Specifically relating to the AB200 heater, the high limit is a ATTENTION capillary and switch mounted to a bracket near the burner. If switch replacement is necessary you will need to route the ■ Four spacer clips are required per switch (spacer capillary behind the burner, and then across the heat part #130-09051). chamber face, allowing 12 inches of capillary to be in contact with the heat chamber. The capillary is held in ■ Install and position the spacers as illustrated. position by tabs that are formed from the heat chamber. Insure you have also installed the spacer clips on the ■ Do not kink the capillary tube, or pinch it between capillary to prevent premature high limit tripping. the formed tabs and the heat chamber by using unnecessary force. Capillary damage with subsequent switch failure will occur.
Dashed Line Indicates Capillary Routed Capillary Routing Over Spacer Behind Burner
High Limit Switch Capillary Beneath Spacer
12”
Formed Tabs Spacer
August 1999 8.7-22 Servicing Instructions
Burner and Burner Orifice
Over a period of time, the burner and orifice may start to blockages cannot be removed by general cleaning. If become blocked if cleaning is not provided. This can create removal is necessary, refer to the following instructions. poor burning of the fuel gas, resulting in nuisance heater Familiarize yourself with these procedures before problems. Removal of burner and orifice may be required if disassembly.
1. Shut off the gas supply to the heater and disconnect the heater’s electrical supply. Allow heater to cool.
2. Remove the hose and sediment trap from the inlet of the gas control valve.
3. Remove the burner retaining bolt or screws from the underside of the heater.
Bracket Bolt
4. Open the burner end access panel (if applicable).
5. Remove the protective cover from over the control valve (if applicable). Bracket 6. The gas control valve with manifold can now be readied for removal from the heater. This procedure varies slightly depending on model and age of the heater. Some models allow the removal of two screws Others may also require removal of a bolt that secures that can be accessed at the control valve inlet. the control valve to the heater base.
Some may require removal of a bracket at the control valve inlet, or beneath the throttle valve on the manifold.
8.8-11 August 1999 Servicing Instructions
Burner and Burner Orifice
7. Remove the two screws and spacers located at the right and left hand top of the burner casting (if applicable).
Orifice Screw
8. Disconnect the electrical leads, pilot line, and thermocouple from the gas control valve. 11. Check the orifice for external build up of dust. Brush or blow off as necessary. If it still appears plugged, 9. Remove the burner and valve/manifold assembly from remove and inspect the burner orifice. Blow out the the heater. Some larger models may require you to orifice hole with compressed air until the hole is open. pivot the valve and manifold assembly to remove the Also, inspect the manifold area into which the orifice orifice from beneath the burner. was threaded to make sure there aren’t any blockages. If necessary, remove that portion of the 10. Hold the burner casting up to a light. If it appears manifold and clean it also. plugged, then use compressed air to try and remove the blockage. If this is not successful, straighten a 12. Reassemble all components. Use pipe thread wire coat hanger and push it up from the gas inlet end compound on threaded connections. of the casting, moving it around vigorously to dislodge dust, dirt, insect nests, etc. Blow out with compressed 13. Restart the heater. Check for proper burner flame air. characteristics and for gas leaks.
August 1999 8.8-22 Servicing Instructions
Leak and Gas Pressure Checks
Equipment Required: A. Preparation
Certified Leak Detectors 1. Make sure all threaded connections to the inlet of the control valve are tightened securely. Obtain two 1 - 3/16 Hex Head Allen Key pressure gauges capable of reading up to 35 in. W.C.
2 - Low Pressure Gauge Kits, 2. Disconnect the heater from the electrical supply and Part Number 550-00764 close the fuel supply valve to the heater inlet.
3. Open or remove the burner access panel. Remove the ATTENTION protective cover from over the control valve, if applicable. This procedure is to be done once a year prior to the heating season, any time the appliance is moved from one location 4. Brush or blow off any dust or dirt on or in the vicinity to the other, or after servicing the heater. of the gas control valve.
B. Gauge Installation WARNING Fire and Explosion Hazard 1. Locate the inlet and outlet pressure taps. ■ Do not disassemble the gas control valve. ■ Do not attempt to replace any components on the gas control valve. ■ The gas control valve must be replaced if any physical damage occurs to the control valve assembly. Inlet Outlet Pressure ■ Pressure Failure to follow this warning will result in fire or Tap Tap explosions, leading to injury or death to humans and livestock, and building damage.
ATTENTION
■ The following explains a typical procedure to be followed in checking gas pressures on control valves. ■ The gas pressures will vary depending upon heater 2. Using a 3/16 in. allen key, remove the taps at the inlet model and fuel type. and outlet of the control valve and install a threaded ■ gauge adapter and a low pressure gauge at these Consult the dataplate or the heater specification on points. Since some heaters used control valves from pages 4 and 5 in this guide for specific pressures to be different manufacturers, the location of the pressure used in conjunction with this procedure. taps may vary slightly. ■ Gas pressure measured at the inlet to the gas valve is Inlet Pressure and gas pressure measured at the outlet of the gas valve is Burner Manifold Pressure.
8.9-11 August 1999 Servicing Instructions
Leak and Gas Pressure Checks
a. Check all pipe connections, hose connections, Gauge fittings and adapters upstream of the gas control Adapter with approved gas leak detectors. In the event a gas leak is detected, check the components involved for cleanliness and proper application of pipe compound before further tightening.
b. Tighten the gas connections as necessary to stop the leak.
c. After all connections are checked and any leaks are stopped, start the heater so the main burner ignites.
d. Stand clear while the main burner ignites to prevent injury caused from hidden leaks that could cause flashback.
e. With the main burner in operation, check all connections, hose connections, fittings and joints as well as the gas control valve inlet and outlet connections with approved gas leak detectors.
f. If a leak is detected, disconnect the heater from its electrical supply and close the fuel supply valve to the heater.
Valve shown is outside of heater for clarity of view.
C. Leak Check
WARNING Fire and Explosion Hazard ■ Do not use open flame (matches, torches, candles, etc.) in checking for gas leaks. g. Check the components involved for cleanliness in ■ the thread areas and proper application of pipe Use only approved leak detectors. compound. ■ Failure to follow this warning can lead to fires or explosions. h. Tighten the gas connection as necessary to stop the leak. If necessary, replace the parts or ■ Fires or explosions can lead to property damage, components involved if the leak cannot be personal injury or loss of life. stopped. Ensure all gas leaks have been identified and repaired before proceeding. 1. Check all connections for gas leaks using approved gas leak detectors. Gas leak testing is performed as follows:
August 1999 8.9-22 Servicing Instructions
Leak and Gas Pressure Checks
D. Reading Pressures b. Using a standard screwdriver, turn the plastic adjusting screw until the gauge reads proper 1. With the heater operating, the pressure gauges manifold pressure. Clockwise increases outlet should read the pressures specified on the dataplate, pressure. Counterclockwise will decrease or in the specification section of this guide. pressure.
2. Do the readings at the inlet and outlet pressure gauges agree with that specified on the dataplate? If so, then no further checking or adjustment is required. Proceed to Section F.
3. If the inlet pressures do not agree with that specified on the dataplate, then the building system regulator controlling gas pressure to the heaters requires adjustment.
4. If the inlet pressures are correct but the burner manifold pressure does not agree with that specified on the dataplate, then the gas control valve’s internal pressure regulator requires adjustment. Proceed to Section E.
E. Burner Manifold Pressure Adjustment c. Reinstall regulator cap on valve. Refer to the following instructions, after proper inlet pressure has been established. NOTE: 1. Light the heater. Once the heater has lit, observe at Procedures for adjusting outlet pressure on control valves the manifold (outlet) pressure gauge. Burner manifold used on earlier models are the same. However, the internal pressure must be the same pressure as given on the regulator on the valve is at a slightly different location. dataplate.
2. If the manifold pressure does not correspond to the 3. Close the fuel valves and disconnect the electrical manifold pressure given on the dataplate, the outlet supply to the heater. pressure must be adjusted at the valve by following these instructions. (This procedure must be 4. Remove gauges and adapters and reinstall the accomplished with the burner on.) pressure tap plugs, tightening both securely.
a. Remove the regulator cap on the control valve to 5. Open the fuel supply valves and reconnect heater to expose the output pressure adjusting screw. electrical supply. Test heater for proper operation.
(Valve shown outside of heater for clarity of viewing.) F. Completion
1. Once inlet and burner manifold pressures have been confirmed and/or properly set, close the fuel supply valve to the heater and allow the heater to burn off any as remaining in the gas supply line.
2. Disconnect the heater from its electrical supply.
3. Remove the gauges and connecting hoses. Regulator Cap 4. Reinstall the pressure tap plugs and tighten securely. Check for gas leaks to insure the tap screws have seated properly.
8.9-33 August 1999 Servicing Instructions
Leak and Gas Pressure Checks
The preceding instructions dealing with inlet and manifold pressure checks and leak testing generally apply to all control valves. However, due to model and age variations of heaters, there are several differences between control Pilot valves with which you must be familiar. Button ■ Part number 500-02309 has burner manifold pressure taps located on either side of the control valve’s main solenoid. Inlet Pilot Line Pressure ■ The inlet pressure tap is located near the pilot button Connection Tap and pilot line connection. Manifold ■ This control valve does not incorporate an internal gas Pressure shut off nor low pressure regulator. All pressure adjustments must be made at the second-stage Tap regulator supplying gas to the heater. Additionally, the gas supply will need to be shut off at the supply line to isolate the heater.
August 1999 8.9-44
Service Parts, Kits and Accessories
Parts Identification Guide
The parts identification guides on the following pages have In many cases you will find components are common been designed to give a quick reference to component parts between different designs of the model number. Parts lists used on pilot ignition agricultural building heaters. The and schematics are shown on the following pages for the guides identify components not only used on current respective heaters. production, but also on equipment that is of earlier design. To use the guides properly, you should know the model The parts guides also identify part numbers for the most numbers of the heater and its design sequence. This commonly requested components, wires, and hardware information is identified on the dataplate. Some models items used on the heaters. If a wire, nut, or screw, etc. is not may have the design sequence shown as the 4th digit of the identified, please contact the L. B. White Co. for parts model number. For other models, the dataplate will identify ordering information. a configuration number. The design sequence is the first digit of the configuration number.
Dataplate Comparison Without Configuration Number With Configuration Number
DESI GN DESI GN RI C MODEL AW075EHP3 ME AN ERI CA 346K A M N MODEL AW060AB250 A GSA GS SERIAL NO.: CONFIGURATION NO. AHPD210000APPD110004 A A A SS ON S N OCI ATI SERIAL NO.: SOCI ATI O Design CE D C RTI FI E Design ERTI FI ED MAXIMUM INPUT: 75,00060,000 BTUHBTUH Sequence MAXIMUM INPUT: 60,000250,000 BTUH TYPE FUEL: PROPANE VAPOR WITHDRAWAL TYPE FUEL: PROPANE VAPOR WITHDRAWAL Sequence BURNER MANIFOLD PRESSURE 1011 IN W.C. AT MAXIMUM INPUT BURNER MANIFOLD PRESSURE 10.0 IN W.C. AT MAXIMUM INPUT ELECTRICAL: 115 VOLTS A.C. 60 HZ SINGLE PHASE 1.4 AMPS ELECTRICAL: 115 VOLTS A.C. 60 HZ SINGLE PHASE 1.5 AMPS MIN. CLEARANCES FROM HEATER TO ADJACENT COMBUSTIBLE MATERIALS: REAR 16 FTIN. SIDES 16 FT IN. MIN. CLEARANCES FROM HEATER TO ADJACENT COMBUSTIBLE MATERIALS: REAR 1 FT SIDES 1 FT TOP TO CEILING 16 FT IN. BLOWER OUTLET 6 FT AND FUEL CONTAINER 6 FT TOP TO CEILING 1 FT BLOWER OUTLET 6 FT AND FUEL CONTAINER 6 FT VENTILATION: 450250 CFM OF AIR REQUIRED TO SUPPORT COMBUSTION. VENTILATION: 1050240 CFM OF AIR REQUIRED TO SUPPORT COMBUSTION. MAXIMUM 13.5 INCHES W.C. AND MINIMUM 11.5 INCHES W.C. GAS SUPPLY PRESSURE MAXIMUM 13.5 INCHES W.C. AND MINIMUM 11.5 INCHES W.C. GAS SUPPLY PRESSURE ACCEPTABLE AT INLET 0F HEATER FOR PURPOSE OF INPUT ADJUSTMENT. ACCEPTABLE AT INLET 0F HEATER FOR PURPOSE OF INPUT ADJUSTMENT. POSITION HEATER AWAY FROM LIVESTOCK POSITION HEATER AWAY FROM LIVESTOCK AGRICULTURAL BUILDING HEATER AGRICULTURAL BUILDING HEATER
L. B. WHITE CO., INC. W6636 L.B. WHITE ROAD ONALASKA, WI 54650 608/783-5691 L. B. WHITE CO., INC. W6636 L.B. WHITE ROAD ONALASKA, WI 54650 608/783-5691
August 1999 9.1-11 Service Parts, Kits and Accessories
Parts Identification Guide Model AS040 Item Description Design Sequence Part Number 1 Regulator, Second Stage, Vent Over Side (LP Gas) A 550-006665 Regulator, Single Stage (Natural Gas) A 550-001326 2 Nipple, 1/2 x 3 1/2 A 130-007148 3 Valve, Manual Shut-OOff A 130-005548 4 Hose, 1/2 x 10 ft. A 550-220543 5 Sediment Trap A 500-000815 6 Adapter, 1/2 NPT x 1/2 NPS A 310-002894 7 Nipple, 3/8 x 1 1/2 A 130-002421 8 Bushing A 130-001195 9 Bolt A 130-005576 10 Valve, Gas Control (LP Gas or Natural Gas) A 500-002309 11 Cap, Pilot A 130-006844 12 Bracket, Terminal Strip A 225-008245 13 Terminal Strip A 120-008253 14 Cover, Terminal Strip A 225-008246 15 Manifold (LP Gas) A 400-008774 Manifold (Natural Gas) A 400-008780 16 Orifice, Burner (LP Gas) A 310-008666 Orifice, Burner (Natural Gas) A 310-008667 17 Burner A 110-008766 18 Thermocouple, 18 in. A 120-001090 19 Tube, Pilot A 410-008769 20 Orifice (LP Gas) A 130-002689 Orifice (Natural Gas) A 130-002740 21 Screw, Pilot A 130-008048 22 Pilot Assembly with Orifice (LP Gas) A 130-002729 Pilot Assembly with Orifice (Natural Gas) A 130-002741 23 Shield, Pilot (LP Gas) A 220-003408 Shield, Pilot (Natural Gas) A 220-006534 24 Switch, High Limit A 120-005566 25 Spacer A 130-008375 26 Clip A 130-001759 27 Door, Burner End (1) A 271-008759 28 Handle A 410-009297 29 Panel, Air Inlet A 271-008760 30 Panel, Motor Access A 271-009071 31 Case Assembly (1) A 400-008775 32 Housing, Fan A 400-008988 33 Fan Blade A 130-008746 34 Mount, Motor A 220-008764 35 Spacer A 130-008375 36 Motor A 120-008745 37 Chamber, Heat A 400-008772 38 Holder, Burner A 260-008757 39 Bracket, Manifold A 220-009012 40 Base A 220-008765 41 Cord, Power A 120-008285
(1) Specify fuel gas type and model number when ordering.
WIRE SELECTION TABLE DESCRIPTION COLOR LENGTH PART NO. FASTENER SELECTION TABLE Wire, Harness, DESCRIPTION APPLICATION PART NO. High Limit Switch Black 20 in. 430-08768 Screw Case 130-02330
9.1-22 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide 28 Model AS040
31
29
30
27
37 25
24 32 26
33 23 38 34 22 16 17 35 21 11 36 20 14
40 19 13 18 15 12 6 41 39 42 10
9 5 1
INSTALLATION OF GAS TRAIN ASSEMBLY 2 FOR NATURAL GAS ONLY 1 3 7 4 8 8 7 August 1999 9.1-33 Service Parts, Kits and Accessories
Parts Identification Guide Models 346 and 348 Design Sequence Item Description E F G H J K Part Number 1 Regulator, Single Stage (LP Gas) X X X X X X 550-006772 Regulator, Second Stage (LP Gas) X X X X X X 550-006665 Regulator, Single Stage (Natural Gas) X X X X X X 550-001326 Regulator, Second Stage (Natural Gas) X X X X X X 500-006408 2 Hose, 1/4 in. ID x 10 ft. X X X X X X 550-220543 Hose, 1/2 in. ID x 10 ft. X X X X X X 400-220504 3 Adapter, 1/4 NPT x 9/16-118 X X X X X X 310-001098 4 Valve, Manual Shut-OOff X X X X X X 130-005548 5 Bushing, 3/8 NPT x 1/4 X X X X X X 130-001544 6 Bushing, 1/2 x 1/4 X X X X X X 130-001519 7 Nipple, 1/2 x 1 1/2 X X X X X X 130-002420 8 Bushing, 1/2 x 3/8 X X X X X X 130-001195 9 Nipple, 3/8 x 1 1/2 X X X X X X 130-002421 10 Adapter, 1/2 NPT x 1/2 NPS X X X X X X 310-002894 11 Thermostat with Bracket X X X X X X 500-005568 12 Junction Box X X X X X X 120-003230 13 Cover, Junction Box X X X X X X 120-003231 14 Cord, Power, 5 ft. X X X X X X 120-001220 15 Bracket, Thermostat X X X X X X 220-005493 16 Valve, Pilot Gas Control (LP Gas or Natural Gas) (1) (1) X X X N/A 500-002309 Valve, Pilot Gas Control (LP Gas) N/A N/A N/A N/A N/A X F120-886302 Valve, Pilot Gas Control (Natural Gas) N/A N/A N/A N/A N/A X 410-221410 17 Cap, Pilot, Gas Control Valve N/A N/A X X X N/A 130-006844 18 Orifice, Burner (LP Gas) X X X X X X 310-003418 Orifice, Burner (Natural Gas) X X X X X X 310-001297 19 Burner Casting N/A N/A X X X X 320-008026 Burner Casting X X N/A N/A N/A N/A 320-003410 20 Pilot Assembly with Orifice (LP Gas) X X X X X X 130-002729 Pilot Assembly with Orifice (Natural Gas) X X X X X X 400-002741 21 Orifice, Pilot (LP Gas) X X X X X X 130-002689 Orifice, Pilot (Natural Gas) X X X X X X 130-002740 22 Shield, Pilot X X X X X X 220-008205 23 Tube, Pilot with Nuts X X X X X N/A 550-003032 Tube, Pilot with Nuts N/A N/A N/A N/A N/A X 550-221380 24 Thermocouple, 21 in. X X X X X X 120-003497 25 Base X X X X X 220-221412 Base N/A N/A N/A N/A N/A X 220-221412 26 Motor X X X X X X 500-007487 27 Mount, Motor (2) (2) X X X x 220-005490 28 Wheel, Fan X X X X X X 130-002808 29 Housing, Fan X X X X X X 500-005579 30 Switch, High Limit X X X X X X 120-005566 31 Cover, High Limit X X X X X X 220-005567 32 Case, Assembly X X X X X X 500-001212(3) 33 Handle X X X X X X 410-009297 34 Chamber, Heat X X X X X N/A 410-009297 Chamber, Heat N/A N/A N/A N/A N/A X 420-007767 35 Bracket, Gas Control Valve N/A N/A N/A N/A N/A X 225-222095 36 Cover N/A N/A N/A N/A N/A X 225-222096 37 Sediment Trap X X X X X X 500-000815 (1) For replacement control valve, order conversion kit part 500-03398. FASTENER SELECTION TABLE (2) Not used on E and F designs. DESCRIPTION APPLICATION DESIGN PART NO. (3) Specify fuel gas type and model number when ordering. Screw, 8 x 3/4 Sheet Metal High Limit Switch, Mounting All 130-02330 N/A Not Applicable. Screw, 10-24 x 1/4 Machine Burner Mounting E-J 130-08028 Bolt, 3/8 - 16 x 5/8 Gas Control Valve to Base E-J 130-05576 WIRE SELECTION TABLE Spacer Gas Control Valve to Base E-J 130-05489 DESCRIPTION COLOR LENGTH DESIGN PART NO. Screw All Other Applications All 130-07289 Wire, High Limit Black 25 in. All 430-06373 Washer Burner Mounting K 130-01589 Screw Burner Mounting K 130-03068
9.1-44 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide
Models 346 and 348
33
32
34 31
30
29
28
27 19
26 17 20 16 22
24 1 25 36 8 21 9 1 18 9 35 16 23 8 4 14 TO NATURAL 15 GAS SUPPLY 13 5 2 11 3 12 6 2 37 10 4 SEDIMENT TRAP KIT OPTIONAL ACCESSORY
August 1999 9.1-55 Service Parts, Kits and Accessories
Parts Identification Guide
Models 377 and 379 Design Sequence Item Description E F G H J K Part Number 1 Regulator, Single Stage (LP Gas) X X X X X N/A 550-006772 Regulator, Single Stage (LP Gas) N/A N/A N/A N/A N/A X 410-221408 Regulator, Second Stage (LP Gas) X X X X X X 550-006665 Regulator, Single Stage (Natural Gas) X X X X X X 550-002736 2 Adapter, Hose, 3/8 NPT x 1/2 NPS X X X X X N/A 310-003536 Adapter, Hose, 1/2 NPT x 1/2 NPS N/A N/A N/A N/A N/A X 310-002894 3 Hose, 1/2 in. ID x 10 ft. X X X X X X 400-220504 4 Junction Box X X X X X X 120-003230 5 Cover, Junction Box X X X X X X 120-003231 6 Thermostat with Bracket X X X X X X 500-005568 7 Bracket X X X X X X 220-005493 8 Cord, Power, 5 ft. X X X X X X 120-003438 Cord, Power, 10 ft. X X X X X X 120-003015 9 Base, Terminal Board X X X X X N/A 120-220171 10 Cover, Terminal Board X X X X X N/A 500-002686 11 Valve, Manual Shut Off X X X X X X 130-005548 12 Nipple, 1/2 x 1 1/2 X X X X X N/A 130-002420 13 Valve, Gas Control (LP Gas or Natural Gas) (1) (1) X X X N/A 500-002309 Valve, Gas Control (LP Gas) N/A N/A N/A N/A N/A X 120-221839 Valve, Gas Control (Natural Gas) N/A N/A N/A N/A N/A X 120-221840 14 Cap, Pilot X X X X X N/A 130-006844 15 Bushing, Reducing X X X X X N/A 130-001519 16 Tube, Pilot with Nuts X X X X X N/A 130-003580 Tube, Pilot with Nuts N/A N/A N/A N/A N/A X 410-221526 17 Orifice, Pilot (LP Gas) X X X X X X 130-002689 Orifice, Pilot (Natural Gas) X X X X X X 130-002740 18 Pilot Assembly with Orifice (LP Gas) X X X X X X 130-002729 Pilot Assembly with Orifice (Natural Gas) X X X X X X 130-002741 19 Thermocouple, 21 in. X X X X X X 120-003497 20 Shield, Pilot X X X X X N/A 220-003509 Shield, Pilot N/A N/A N/A N/A N/A X 220-220264 21 Holder, Orifice X X X X X N/A 310-002690 22 Orifice, Burner (LP Gas) X X X X X N/A 310-003518 Orifice, Burner (Natural Gas) X X X X X N/A 310-003519 Orifice, Burner (LP Gas) N/A N/A N/A N/A N/A X 310-221525 Orifice, Burner (Natural Gas) N/A N/A N/A N/A N/A X 310-221528 23 Manifold, U-SShape X X X X X N/A 410-007061 Manifold, Welded N/A N/A N/A N/A N/A X 420-007826 24 Burner, Casting X X X X X X 320-003453 25 Gasket N/A N/A N/A N/A N/A X 130-006974 26 Screw, Burner Mounting X X X X X X 130-002688 27 Stud, Pilot N/A N/A N/A N/A N/A X 130-007827 28 Screw, Pilot X X X X X X 130-003070 29 Spacer, Burner X X X X X X 130-002687 30 Switch, High Limit X X X X X X 120-005566 31 Washer X X X X X N/A 130-002686 32 Chamber, Heat X X X X X X 400-221522 33 Case, Assembly X X X X X X 500-005628(2) 34 Panel, Case, Burner End X X X X X X 271-007334(2) 35 Panel, Case, Opposite Burner X X X X X X 271-007335 36 Ring, Inlet N/A N/A X X X X 220-005507 37 Fan, Wheel X X X X X X 130-003531 38 Flapper N/A N/A X X X X 410-002941 39 Housing, Fan with Air Proving Switch and Flapper X X X X X X 500-005572 40 Switch, Air Proving N/A N/A X X X X 500-002680 41 Motor X X X X X X 550-006008 42 Base X X X X X X 220-220145 43 Washer X X X X X X 130-001589 44 Bolt, Burner X X X X X N/A 130-002692 Bolt, Burner N/A N/A N/A N/A N/A X 130-007908 45 Bracket, Gas Control Valve N/A N/A N/A N/A N/A X 220-221043 46 Screw N/A N/A N/A N/A N/A X 130-009425 47 Spacer, Nylon N/A N/A N/A N/A N/A X 130-007905 48 Sediment Trap X X X X X X 500-000815 (1) For replacement control valve, order conversion kit part 500-03398. (2) Specify fuel gas type and model number when ordering. N/A Not Applicable. WIRE SELECTION TABLE DESCRIPTION COLOR LENGTH DESIGN PART NO. Wire, Thermostat to Black 16 in. All 430-07227 FASTENER SELECTION TABLE Terminal Board DESCRIPTION APPLICATION PART NO. Wire, High Limit Switch Black 25 1/4 in. All 430-03105 Screw, # 8 x 3/8 Case Assembly 130-07288 Wire, Air Flow Switch Black 14 in. All 430-05557 9.1-66 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide
Models 377 and 379
34 35
33
36 37 32 31
30
29 24 18 25 20
17 28 39 26 1 16 27 1 38 19 14 23 41 13 22 21 10 40 15 9 42 NATURAL 12 12 GAS SUPPLY 4 11 8 5 2 22 6 3 23 7
43 47 48 44 13 46 SEDIMENT TRAP KIT 45 OPTIONAL ACCESSORY
August 1999 9.1-77 Service Parts, Kits and Accessories
Parts Identification Guide
Models 408 and 410 Design Sequence Item Description E F G H J K Part Number 1 Regulator, Single Stage (LP Gas) X X X X X X 400-009911 Regulator, Second Stage (LP Gas) X X X X X X 550-006665 Regulator, Single Stage (Natural Gas) X X X X X X 550-002736 Regulator, Second Stage (Natural Gas) X X X X X X 500-006408 2 Hose, 1/2 in. x 10 ft. X X X X X X 400-220504 3 Adapter, 1/2 NPT x 1/2 NPS X X X X X X 310-002894 4 Valve, Manual Shut Off X X X X X X 130-005548 5 Nipple, 1/2 in. x 3 1/2 in. X X X X X X 130-007148 6 Elbow X X X X X X 130-001359 7 Valve, Gas Control (LP Gas and Natural Gas) (1) (1) X X X N/A 500-002309 Valve, Gas Control (LP Gas) N/A N/A N/A N/A N/A X 120-221839 Valve, Gas Control (Natural Gas) N/A N/A N/A N/A N/A X 120-221840 8 Cap, Pilot Safety X X X X X N/A 130-006844 9 Bushing X X X X X N/A 130-001519 10 Nipple, 1/4 in. x 3 in. X X X X X N/A 130-003114 11 Holder, Orifice X X X X X N/A 310-002690 12 Orifice, Burner (LP Gas) X X X X X N/A 310-002691 Orifice, Burner (Natural Gas) X X X X X N/A 310-002740 Orifice, Burner (LP Gas) N/A N/A N/A N/A N/A X 310-221573 Orifice, Burner (Natural Gas) N/A N/A N/A N/A N/A X 310-221574 13 Screw N/A N/A N/A N/A N/A X 130-009425 14 Spacer, Nylon N/A N/A N/A N/A N/A X 130-007905 15 Manifold N/A N/A N/A N/A N/A X 420-007826 16 Bracket N/A N/A N/A N/A N/A X 230-009290 17 Thermocouple, 21 in. X X X X X X 120-003497 18 Tube, Pilot with Nuts X X X X X N/A 550-003032 Tube, Pilot with Nuts N/A N/A N/A N/A N/A X 550-221380 19 Orifice, Pilot (LP Gas) X X X X X X 130-002689 Orifice, Pilot (Natural Gas) X X X X X X 130-002740 20 Pilot Assembly with Orifice (LP Gas) X X X X X X 130-002729 Pilot Assembly with Orifice (Natural Gas) X X X X X X 130-002741 21 Gasket, Pilot N/A N/A X X X X 130-006974 22 Shield, Pilot (LP Gas) X X X X X N/A 220-003408 Shield, Pilot (Natural Gas) X X X X X N/A 420-003455 Shield, Pilot (LP and Natural Gas) N/A N/A N/A N/A N/A X 220-220264 23 Burner (LP Gas) X X X X X (2) 320-003453 Burner (Natural Gas) X X X X X N/A 320-003454 24 Spacer, Burner X X X X X X 130-002687 25 Cord, Power, 5 ft. X X X X X X 120-003438 Cord, Power, 10 ft. X X X X X X 120-003015 26 Bracket, Thermostat X X X X X X 220-005493 27 Stud, Pilot N/A N/A N/A N/A N/A X 130-007827 28 Screw, Pilot X X X X X X 130-003070 29 Washer X X X X X X 130-001589 30 Bolt X X X X X N/A 130-002692 Bolt N/A N/A N/A N/A N/A X 130-007908 31 Thermostat with Bracket X X X X X X 500-005568 32 Cover, Junction Box X X X X X X 120-003231 33 Junction Box X X X X X X 120-003230 34 Cover, Terminal Board X X X X X N/A 500-002686 35 Base, Terminal Board X X X X X N/A 120-220171 36 Screw, Burner X X X X X X 130-002688 37 Switch, High Limit X X X X X X 120-005566 38 Washer X X X X X N/A 130-002686 39 Chamber, Heat X X X X X X 400-009241 40 Case Assembly X X X X X X 500-002673(3) 41 Panel, Case, Burner End X X X X X X 271-007333(3) 42 Panel, Case, Motor End X X X X X X 271-007332 43 Motor X X X X X X 550-006008 44 Mount, Motor N/A N/A X X X X 220-003764 45 Switch, Air Proving N/A N/A X X X X 500-002680 46 Flapper N/A N/A X X X X 240-002441 47 Fan, Wheel X X X X X X 130-002684 48 Housing with Air Proving Switch and Flapper N/A N/A X X X X 500-005570 49 Base X X X X X X 220-005570 50 Sediment Trap X X X X X X 500-000815 (1) For replacement control valve, order conversion kit part #500-03398. (2) Part #320-03453 is used for LP and Natural Gas on K design heaters. (3) Specify fuel gas type when ordering. WIRE SELECTION TABLE N/A Not Applicable. DESCRIPTION COLOR LENGTH DESIGN PART NO. Wire, Thermostat to Black 12 1/2 in. All 430-02723 FASTENER SELECTION TABLE Terminal Board DESCRIPTION APPLICATION PART NO. Wire, Air Flow Switch Black 42 in. All 430-02724 Screw, # 8 x 3/8 Case Assembly 130-07288 Wire, High Limit Switch Black 25 1/4 in. All 430-03105 9.1-88 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide
Models 408 and 410
41 42
40
39
43 38 47 37
44 33 36 45 22 32 24 46 48 31 49 20 12 34 23 11 27 10 8 35 1 21 15 26 28 7
19 9 6 25 5 16 17 18 14 13 4 7 5 29 NATURAL GAS SUPPLY 1 30 2 50 3
SEDIMENT TRAP KIT OPTIONAL ACCESSORY August 1999 9.1-99 Service Parts, Kits and Accessories
Parts Identification Guide Model AB200 Design Sequence Item Description A B Part Number 1 Regulator, Second Stage (LP Gas) X X 550-006553 Regulator (Natural Gas) X X 550-002736 2 Nipple, 1/2 x 3 1/2 X X 130-007148 3 Valve, Manual Shut-OOff X X 130-005548 4 Hose, 1/2 in. ID x 10 ft. X X 400-220504 5 Adapter, Hose X X 310-002894 6 Kit, Sediment Trap X X 500-000815 7 Nipple, 1/2 x 1 1/2 X X 130-002420 8 Valve, Pilot Gas Control (LP Gas or Natural Gas) X X 500-002309 9 Cap, Pilot X X 130-006844 10 Manifold, Welded X X 130-007826 11 Orifice, Burner (LP Gas) X X 310-008056 Orifice, Burner (Natural Gas) X X 310-008057 12 Thermocouple, 18 in. X X 120-001090 13 Tube, Pilot, with Nuts X X 550-003012 14 Orifice, Pilot (LP Gas) X X 130-007829 Orifice, Pilot (Natural Gas) X X 130-006968 15 Screw, Wing X X 130-007484 16 Bracket, Pilot X X 130-007831 17 Screw, Burner Mounting X X 130-002688 18 Spacer, Burner X X 130-002687 19 Shield, Pilot with Pilot Stack X X 500-007864 20 Casting, Burner X X 320-003453 21 Stud, Pilot Mounting X X 130-007827 22 Cover, Terminal Strip N/A X 220-008246 23 Bracket, Terminal Strip N/A X 225-008245 24 Strip, Terminal N/A X 120-008253 25 Cover, Terminal Board X N/A 400-005970 26 Board, Terminal X N/A 120-220171 27 Switch, High Limit X X 500-007887 28 Chamber, Heat X X 400-007763 29 Bracket, Flame Lift Off X X 220-008231 30 Case Assembly X X 400-008299(1) 31 Door, Access, Right X X 500-008297(1) 32 Door, Access, Left X X 500-008125 33 Hinge X X 130-005868 34 Latch X X 130-009073 35 Motor X X 550-220554 36 Mount, Motor X X 220-003764 37 Wheel, Fan X X 130-002684 38 Flapper X X 240-002441 39 Switch, Air Proving X X 500-002680 40 Housing with Air Proving Switch and Flapper X X 400-005569 41 Base X X 225-007837 42 Bolt X X 130-002692 43 Washer X X 130-001589 44 Cord, Power X X 120-003438 (1) Specify fuel gas type and model number when ordering.
WIRE SELECTION TABLE DESCRIPTION COLOR LENGTH DESIGN PART NO. Wire, Air Proving Switch to Terminal Board Black 42 in. All 430-02724 FASTENER SELECTION TABLE wire, High Limit Switch Black 25 1/4 in. All 430-03105 DESCRIPTION APPLICATION PART NO. Wire, Thermostat to Screw, #8 x 3/8 Case Assembly 130-007288 Terminal Board Black 12 1/2 in. All 430-05263 9.1-110 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide
Model AB200
33 32 31
30
34 35 37
36
44
39
38 40 1
29 28 27 18 25
17 41 26 19 21 NATURAL GAS SUPPLY 20 16 11 2
15 9 3 22 14 4 8 24 23 13 10 5 12 43 42
6 7
1
August 1999 9.1-111 Service Parts, Kits and Accessories
Parts Identification Guide Model AB250 Design Sequence Item Description A Part Number 1 Regulator, Second Stage, Vent Over Side (LP Gas) X 550-006553 Regulator, Second Stage (Natural Gas) X 500-007087 2 Nipple, 3 1/2 in. X 130-007148 3 Valve, Manual Shut-OOff X 130-005548 4 Adapter, Hose, 1/2 NPT x 1/2 NPS X 510-002894 5 Hose, 1/2 in. ID x 10 ft. X 550-220704 6 Kit, Sediment Trap X 500-000815 7 Base X 225-220431 8 Bracket, Gas Control Valve X 225-009506 9 Bolt X 130-002692 10 Valve, Gas Control (LP Gas) X 410-220439 Valve, Gas Control (Natural Gas) X 410-220440 11 Nipple, 1/2 in. x 1 1/2 in. X 130-002420 12 Valve, Throttle (LP Gas) X 410-220143 Valve, Throttle (Natural Gas) X 410-220144 13 Ell, Street X 130-001359 14 Manifold X 420-009291 15 Orifice, Burner (LP Gas) X 310-220141 Orifice, Burner (Natural Gas) X 310-220142 16 Gasket, Pilot X 130-006974 17 Thermocouple, 21 in. X 120-003497 18 Tubing, Pilot X 410-220436 19 Orifice, Pilot (LP Gas) X 130-007829 Orifice, Pilot (Natural Gas) X 130-006968 20 Cover, Pilot (Bottom) X 225-220265 21 Screw, Wing X 130-007484 22 Stud X 130-007827 23 Pilot, Bracket X 130-007831 24 Shield, with Pilot Barrel X 500-220264 25 Terminal Strip X 120-008253 26 Enclosure, Electrical X 225-220028 27 Cover, Electrical X 225-220027 28 Screw X 130-002688 29 Burner X 320-003453 30 Spacer X 130-002687 31 Switch, High Limit X 120-005566 32 Chamber, Heat X 400-220024 33 Door, Left or Right X 225-008629 34 Cord, Power X 120-220426 35 Latch X 130-009467 36 Hinge X 430-005868 37 Case Assembly X 500-220434(1) 38 Motor X 120-220169 39 Mount, Motor X 225-008647 40 Wheel, Fan X 130-009050 41 Switch, Air Proving X 500-002680 42 Flapper (Sail) X 240-009076 43 Housing, Fan, with Flapper, Air Proving, and Motor Mount X 500-220250 (1) Specify fuel gas type and model number when ordering. NOTE: For fixed rate heater, replace items 11, 12 and 13 with a 1/2 in. elbow, part number 130-01426 and nipple, 1/2 in. x 3 1/2 in., part number 130-07148. WIRE SELECTION TABLE DESCRIPTION COLOR LENGTH PART NO. Wire, Gas Control to Terminal Strip White 24 in. 120-20423 Wire, Air Flow Switch to Terminal Strip Black 45 in. 120-20424 FASTENER SELECTION TABLE Wire, High Limit Switch DESCRIPTION APPLICATION PART NO. to Air Flow Switch Black 60 in. 120-20425 Bolt Burner Mounting 130-02692 9.1-112 August 1999 Service Parts, Kits and Accessories
Parts Identification Guide
Model AB250
33 37
36
38
34 40
35
33 39
41
32 42
43
31 30 29 7 27
26 1 24 16 28 23 15 22 21 14 20 25 2 10 3 19 13 12 5 18 11 17 45 4 9 8 6
August 1999 9.1-113 Service Parts, Kits and Accessories
Kits and Accessories
This section provides part numbers for many of the more commonly requested kits and accessories used on pilot light ignition heaters.
GAS CONVERSION KITS Control Valves without Internal Low Pressure Regulators and Gas Shut Offs (Control Valve Part #500-002309) PART PROPANE TO NATURAL GAS NUMBER MODEL NUMBER DESIGN(S) 500-09358 346 G, H and J 500-09360 377 G, H and J 500-09362 408 G, H and J 500-09364 AB200 A 500-09366 AS040 A NATURAL GAS TO PROPANE 500-09359 348 G, H and J 500-09361 379 G, H and J 500-09363 410 G, H and J 500-09365 AB200 A 500-09367 AS040 A
GAS CONVERSION KITS Control Valves with Internal Low Pressure Regulators and Gas Shut Offs PART PROPANE TO NATURAL GAS NUMBER MODEL NUMBER DESIGN(S) 500-21619 346 K 500-21620 377 K 500-21621 408 K 500-20650 AB250 A NATURAL GAS TO PROPANE 500-21622 348 K 500-21623 379 K 500-21624 410 K 500-20652 AB250 A
9.2-11 August 1999 Service Parts, Kits and Accessories
Kits and Accessories
TEST KITS PART DESCRIPTION NUMBER
550-00764 Low Gas Pressure Test Kit
550-08506 Thermocouple Test Kit
MISCELLANEOUS KITS PART DESCRIPTION NUMBER
500-07802 Indoor Chain Hanging Kit
AIR DIVERTERS PART DESCRIPTION MODELS NUMBER
346, 348 550-07742 Two Piece (Snap-In) AB200, 377, 379, 408, 410 550-07434 AB250 550-20048
346, 348 500-00810 One Piece AB200, 377, 379, 408, 410 500-00808
THERMOSTATS PART DESCRIPTION NUMBER Remote Thermostat - Penn Stainless Steel 500-06537 (Less Wiring) Remote Thermostat - Penn Stainless Steel 500-00831 w/20' Series Tap Cord Remote Thermostat - Nema 4X 500-09454 w/20' Series Tap Cord Remote Thermostat - Nema 4X 500-09381 Meets NEC Article 547 (Less Wiring)
August 1999 9.2-22
Warranty Guidelines
Equipment and Parts
EQUIPMENT
L.B. White Co., Inc. warrants that the component parts of its or heater, with a new part or heater, F.O.B., Onalaska, heater are free from defects in material and workmanship, Wisconsin. when properly installed, operated, and maintained in accordance with the Installation and Maintenance A warranty card on file at L.B. White will automatically qualify Instructions, safety guides and labels contained with each a unit and its component parts for warranty consideration. If unit. If, within 12 months from the date of purchase by the a warranty card is not on file, a copy of the bill of sale will be end user, any component is found to be defective, L.B. White required to establish warranty qualification. If neither is Co., Inc. will at its option, repair or replace the defective part available, the warranty period will be 12 months from date of shipment from L B. White.
PARTS
L.B. White Co., Inc. warrants that replacement parts duration to the duration of the applicable warranty stated purchased from the company and used on the appropriate above. The remedies set forth above are the sole and L.B. White heaters are free from defects both in material and exclusive remedies available hereunder. L.B. White will not workmanship for 12 months from the date of purchase by be liable for any incidental or consequential damages the end user. Warranty is automatic if a component is found directly or indirectly related to the sale, handling or use of defective within 12 months of the date code marked on the the heater, and in any event L.B. White's liability in part. If the defect occurs more than 12 months later than connection with the heater, including for claims based on the date code but within 12 months from the date of negligence or strict liability, is limited to the purchase price. purchase by the end user, a copy of a bill of sale will be required to establish warranty qualification. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. Some states do not allow the exclusion or limitation of The warranty set forth above is the exclusive warranty incidental or consequential damages, so the above provided by L.B. White, and all other warranties, including limitation or exclusion may not apply to you. This warranty any implied warranties or merchantability or fitness for a gives you specific legal rights, and you may also have other particular purpose, are expressly disclaimed. In the event rights which vary from state to state. any implied warranty is not hereby effectively disclaimed due to operation of law, such implied warranty is limited in
REPLACEMENT PARTS AND SERVICE
Contact your local L.B. White dealer for replacement parts heater model number and configuration number when and service or call the L.B. White Co., Inc. at calling. 1-800-345-7200 for assistance. Be sure that you have your
August 1999 10.1-11 Warranty Guidelines
Warranty Returns
Warranty Returns
To complement L.B. White’s warranty, the following has been 2. Parts written to simplify the warranty return policy. Our goal is to Authorized L.B. White service dealers can return process warranty returns and issue the appropriate credit to defective service parts, qualified for warranty under you as promptly as possible. Your cooperation in following the L.B. White Warranty Policy, as follows: the procedures listed below will help us achieve our goal. A. By using L.B. White Material Return Tags. Prior 1. Units and Sub-Assemblies factory approval is not required in this case. A A. Defective heaters and sub-assemblies may be Material Return Tag must be filled out completely returned to L.B. White by authorized L. B. White and attached to each defective part being service dealers by obtaining factory approval and a returned. Material Return Tags are available from Return Authorization Number prior to any return L. B. White upon request. shipment. The following information must be supplied when requesting a Return Authorization B. By using the Return Authorization Number Number: procedure described in A. above. 1. Complete heater model and serial number 2. Customer's name and address All items must be returned freight PREPAID. Out of 3. Date sold warranty parts require factory approval and a 4. Date installed Return Authorization Number prior to being 5. Date failed returned. 6. Probable cause of equipment failure 3. Credit B. The Return Authorization Number must be shown Credit will be issued if inspection indicates: on all transmitting paperwork and marked on the A. The item is defective outside of the merchandise return carton. A B. The item is within the warranty period warranty card on file at L.B. White will C. Failure is due to normal use automatically qualify the unit, sub-assembly, or component for a 12-month warranty from date of L.B. White is not responsible for the labor cost of removal of purchase if the material being returned is found a defective product or part, or damages due to removal, or defective. Items must be returned freight expenses incurred in shipping the product or part to or from PREPAID. L.B. White's plant, or the installation of the repaired or replaced product or part. Return of New Items for Credit
1. Factory Approval 4. Item Shipped Incorrectly Factory approval and a Return Authorization Number If the item was shipped in error, L.B. White will must be obtained before any new product or part is authorize shipping freight collect and rescind the 15% returned to L. B. White or credit may not be issued. restocking charge if Step 1 above is followed.
2. Freight 5. Materials Return Tag All items returned for credit must be shipped freight All parts returned to L.B. White must be accompanied prepaid. by a Materials Return Tag with the Return Authorization Number. A separate tag is required for 3. Restocking Charge each part. A 15% restocking charge will apply provided the item is new and in unused condition. Additional charges will be made if reconditioning or new packaging is required. Shipping Damage
1. Parcel Post 2. Truck or United Parcel Service All Parcel Post claims for damages or shortages must Damage claims should be made by the customer be made to L.B. White within 20 days of date of directly to the carrier or UPS. shipment.
10.2-11 August 1999