Vent-Free Natural Gas Mini-Hearth® Heater Owner’S Operation and Installation Manual

¨ VENT-FREE NATURAL GAS MINI-HEARTH® HEATER OWNER’S OPERATION AND INSTALLATION MANUAL

VMH3000TNA

15,000 to 30,000 Btu/Hr with Thermostat Shown with Optional Mantel Which Features a Built-In Base

WARNING: If the information in this manual is not WARNING: Improper installa- followed exactly, a fire or explosion may result tion, adjustment, alteration, causing property damage, personal injury, or service, or maintenance can loss of life. cause injury or property damage. Refer to this manual for — Do not store or use gasoline or other correct installation and op- flammable vapors and liquids in the vicinity erational procedures. For as- of this or any other appliance. sistance or additional infor- — WHAT TO DO IF YOU SMELL GAS mation consult a qualified installer, service agency, or the • Do not try to light any appliance. gas supplier. • Do not touch any electrical switch; do not use any phone in your building. WARNING: This is an unvented • Immediately call your gas supplier from a gas-fired heater. It uses air neighbor’s phone. Follow the gas supplier’s (oxygen) from the room in instructions. which it is installed. Provisions • If you cannot reach your gas supplier, call for adequate combustion and the fire department. ventilation air must be pro- — Installation and service must be performed vided. Refer to Air For Com- by a qualified installer, service agency, or the bustion and Ventilation sec- gas supplier. tion on page 5 of this manual.

This appliance may be installed in an aftermarket*, permanently located, manufactured (mobile) home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. *Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer Save this manual for future reference. ¨ NATURAL GAS RESIDENTIAL HEATERS

SAFETY 3. This heater shall not be installed in a WARNING: Do not use a bedroom or bathroom. INFORMATION blower insert, heat exchanger 4. This heater needs fresh, outside air ven- insert, or other accessory not tilation to run properly. This heater has WARNINGS approved for use with this heater. an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts IMPORTANT: Read this owner’s Due to high temperatures, the down the heater if not enough fresh air manual carefully and completely appliance should be located out is available. See Air For Combustion before trying to assemble, oper- of traffic and away from furniture and Ventilation, pages 5 through 7. ate, or service this heater. Im- and draperies. proper use of this heater can cause 5. Before using furniture polish, wax, car- serious injury or death from burns, pet cleaner, or similar products, turn fire, explosion, electrical shock, Do not place clothing or other heater off. If heated, the vapors from and carbon monoxide poisoning. flammable material on or near these products may create a white pow- the appliance. Never place any der residue within burner box or on objects on the heater. adjacent walls or furniture. DANGER: Carbon monoxide poisoning may lead to death! 6. If heater shuts off, do not relight until Surface of heater becomes very you provide fresh, outside air. If heater Carbon Monoxide Poisoning: Early signs of hot when running heater. Keep keeps shutting off, have it serviced. carbon monoxide poisoning resemble the flu, children and adults away from 7. Do not run heater with headaches, dizziness, or nausea. If you hot surfaces to avoid burns or • where flammable liquids or vapors have these signs, the heater may not be work- clothing ignition. Fireplace will are used or stored. ing properly. Get fresh air at once! Have remain hot for a time after shut- • under dusty conditions. heater serviced. Some people are more af- down. Allow surfaces to cool be- 8. Do not use heater if any part has been fected by carbon monoxide than others. These fore touching. under water. Immediately call a quali- include pregnant women, people with heart or fied service technician to inspect the lung disease or anemia, those under the influ- Carefully supervise young chil- room heater and to replace any part of ence of alcohol, and those at high altitudes. dren when they are in same room the control system and any gas control Natural Gas: Natural gas is odorless. An with heater. which has been under water. odor-making agent is added to natural gas. 9. To prevent the creation of soot, follow The odor helps you detect a natural gas leak. Make sure screen is in place be- the instructions in Cleaning and Main- However, the odor added to natural gas can fore running heater. tenance, page 19. fade. Natural gas may be present even though no odor exists. 10. Turn off and unplug heater and let cool Keep the appliance area clear and before servicing. Only a qualified service Make certain you read and understand all free from combustible materials, person should service and repair heater. warnings. Keep this manual for reference. It gasoline, and other flammable 11. Operating heater above elevations of is your guide to safe and proper operation of vapors and liquids. 4,500 feet could cause pilot outage. this heater. 1. This appliance is only for use with the LOCAL CODES WARNING: Any change to type of gas indicated on the rating plate. this heater or its controls can be This appliance is not convertible for use Install and use heater with care. Follow all dangerous. with other gases. local codes. In the absence of local codes, use 2. If you smell gas the latest edition of The National Fuel Gas Code, ANS Z223.1, also known as NFPA 54*. WARNING: Do not allow fans • shut off gas supply to blow directly into the heater. • do not try to light any appliance *Available from: • do not touch any electrical switch; do Avoid any drafts that alter burner American National Standards Institute, Inc. flame patterns. Ceiling fans can not use any phone in your building. • immediately call your gas supplier 1430 Broadway create drafts that alter burner New York, NY 10018 flame patterns. Altered burner from a neighbor’s phone. Follow the patterns can cause sooting. gas supplier’s instructions National Fire Protection Association, Inc. • if you cannot reach your gas supplier, Batterymarch Park call the fire department Quincy, MA 02269

For more information, visit www.desatech.com 2 107097 OWNER’S MANUAL

PRODUCT Note: Do not remove ASSEMBLY Lighting and Warning IDENTIFICATION Plates from heater ASSEMBLING HEATER Control Knob Ignitor Button Tools Required: • Phillips screwdriver

ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJIASDFKIGLFJI alskdidkoemkgo alskdidkoemdkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJIASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgoASDFKIGLFJI dkirlnfgpd'fASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgoASDFKIGLFJI dkirlnfgpd'fASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgoASDFKIGLFJI dkirlnfgpd'fASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoem ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f • 5/16" hex wrench ASDFKIGLFJI alskdidkoemkgoASDFKIGLFJI dkirlnfgpd'fASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f Lighting and ASDFKIGLFJI alskdidkoem SDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJIASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'ASDFKIGLFJIASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIG ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJIASDFKIGLFJI alskdidkoem alskdidkoemkgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIG ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJIASDFKIGLFJI alskdidkoemkgo alskdidkoem dkirlnfgpd'f SDFKIGLFJI alskdidkoem kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f ASDFKIGLFJI alskdidkoem kgo dkirlnfgpd'fASDFKIG ASDFKIGLFJI alskdidkoem kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem ASDFKIGLFJI alskdidkoem kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem ASDFKIG kgo dkirlnfgpd'ASDFKIG LFJI alskdidkoem ASDFKIGLFJI alskdidkoem kgo dkirlnfgpd'fASDFKIG kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem LFJI alskdidkoem LFJI alskdidkoem kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem Warning Plates kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f LFJI alskdidkoem kgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem kgo dkirlnfgpd'f • slotted screwdriver kgo dkirlnfgpd'ASDFKIG kgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIG LFJI alskdidkoem kgo dkirlnfgpd'f kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoem LFJI alskdidkoem kgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f kgo dkirlnfgpd'f kgo dkirlnfgpd'f kgo dkirlnfgpd'f kgo dkirlnfgpd'f LFJI alskdidkoem kgo dkirlnfgpd'f LFJI alskdidkoem kgo dkirlnfgpd'f kgo dkirlnfgpd'f

kgo dkirlnfgpd'f kgo dkirlnfgpd'f kgo dkirlnfgpd'f kgo dkirlnfgpd'f Removing Front Panel Of Heater 1. Remove two screws near bottom cor- ners of front panel with Phillips screw- Heater driver. Cabinet Screen 2. Pull bottom of front panel forward, then down (see Figure 2) .

Front Panel Log

Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater Figure 2 - Removing Front Panel of Heater PRODUCT UNPACKING FEATURES Installing Hood CAUTION: Do not remove the 1. Remove hood from protective tray. SAFETY DEVICE metal data plates attached to the 2. Locate 4 black sheet metal screws in- heater base assembly. The data side hardware pack. This heater has a pilot with an Oxygen plates contain important warranty 3. Place hood on deflector and line up Depletion Sensing (ODS) safety shutoff information. holes (see Figure 3, page 4). system. The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot 1. Remove heater from carton. 4. Secure hood to deflector with 4 black sheet metal screws. shuts off the heater if there is not enough 2. Remove all protective packaging ap- fresh air. plied to heater for shipment. Note: Side of hood should be on the outside PIEZO IGNITION SYSTEM 3. Make sure your heater includes two flange of deflector. hardware packets. This heater has a piezo ignitor. This system Installing Log 4. Check heater for any shipping damage. requires no matches, batteries, or other Note: For easier installation, lay heater on If heater is damaged, promptly inform sources to light heater. its back. dealer where you bought heater. 1. With Phillips screwdriver, remove two THERMOSTATIC HEAT screws holding screen in place. Remove CONTROL screen. This heater has a thermostat sensing bulb 2. Remove log from inside of deflector. and a control valve. This results in the great- Discard protective packaging. est heater comfort. This can also result in 3. Gently slide log between log retaining lower gas bills. brackets on deflector assembly (see Fig- ure 3, page 4). The log should fit firmly against bottom of log retaining brackets. 4. Reattach screen using two screws removed in step 1.

Continued

107097 3 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

ASSEMBLY 5. Slide other end of adjusting plate/shim in slot on mitered edge of side brass Continued trim (see Figure 5). 6. While firmly holding edges of brass Deflector trim together, tighten both set screws Log Heater on the adjusting plate with slotted Cabinet screwdriver. Hood 7. Repeat steps 1 through 6 for other side. 8. Place the assembled trim on front of Front Panel heater cabinet. Attach on top and sides Sheet Metal Log Screw with four brass screws included in hard- Retaining ware package (see Figure 6). Brackets 9. Reattach front panel to heater if you are going to mount the heater to the base. Truss- Do not reattach front panel at this time Head if you are going to mount heater to wall. Screw Top Brass Nut Burner Shield Adjusting Trim Side Brass Plate Trim Screw Set Screws Brass Front Trim Screen

Screw Shim Figure 3 - Assembling Heater Slot

Brass Front Front Panel Slot Mitered Edge WARNING: Always have Trim Figure 5 - Assembling Brass Trim burner shield and screen in place before operating heater. This pre- Screws vents excessive temperatures on heater surfaces. Assembled Failure to position the parts in Brass Trim accordance with these diagrams or failure to use only parts spe- Nut cifically approved with this heater Truss-Head may result in property damage or Screw personal injury. Figure 4 - Attaching Brass Front Trim to Front Panel Attaching Brass Front Trim to Assembling and Attaching Front Panel Brass Trim 1. Locate brass front trim in brass trim package. 1. Remove packaging from remaining three pieces of brass trim. 2. Slide the head of two truss-head screws from hardware packet into each end of 2. Locate four brass screws, two adjust- brass front trim (see Figure 4). ing plates with set screws, and two Figure 6 - Attaching Brass Trim to Heater shims in the hardware packet. 3. Line up screws with holes in front panel (see Figure 3). Insert screws in holes. 3. Align shim under adjusting plate as Attach nuts from inside of front panel. shown in Figure 4. Tighten with wrench. 4. Slide one end of adjusting plate/shim in slot on mitered edge of top brass trim (see Figure 5).

For more information, visit www.desatech.com 4 107097 OWNER’S MANUAL

AIR FOR PROVIDING ADEQUATE Confined and Unconfined Space COMBUSTION AND VENTILATION The National Fuel Gas Code, ANS Z223.1 The following are excerpts from National defines a confined space as a space whose VENTILATION Fuel Gas Code, NFPA 54/ANS Z223.1, Sec- volume is less than 50 cubic feet per 1,000 3 tion 5.3, Air for Combustion and Ventilation. Btu per hour (4.8 m per kw) of the aggregate input rating of all appliances installed WARNING: This heater shall All spaces in homes fall into one of the three in that space and an unconfined space as a not be installed in a confined space following ventilation classifications: space whose volume is not less than 50 or unusually tight construction 1. Unusually Tight Construction cubic feet per 1,000 Btu per hour (4.8 m3 per unless provisions are provided 2. Unconfined Space kw) of the aggregate input rating of all for adequate combustion and ven- appliances installed in that space. Rooms 3. Confined Space tilation air. Read the following in- communicating directly with the space in structions to insure proper fresh The information on pages 5 through 7 will which the appliances are installed*, through air for this and other fuel-burning help you classify your space and provide openings not furnished with doors, are con- appliances in your home. adequate ventilation. sidered a part of the unconfined space. This heater shall not be installed in a con- Today’s homes are built more energy effi- Unusually Tight Construction fined space or unusually tight construction cient than ever. New materials, increased The air that leaks around doors and win- unless provisions are provided for adequate insulation, and new construction methods dows may provide enough fresh air for combustion and ventilation air. help reduce heat loss in homes. Home owners combustion and ventilation. However, in weather strip and caulk around windows and buildings of unusually tight construction, * Adjoining rooms are communicating only doors to keep the cold air out and the warm air you must provide additional fresh air. if there are doorless passageways or ventila- in. During heating months, home owners tion grills between them. want their homes as airtight as possible. Unusually tight construction is defined as construction where: While it is good to make your home energy a. walls and ceilings exposed to the efficient, your home needs to breathe. Fresh outside atmosphere have a con- air must enter your home. All fuel-burning tinuous water vapor retarder with appliances need fresh air for proper com- a rating of one perm (6x10-11 kg bustion and ventilation. per pa-sec-m2) or less with open- Exhaust fans, fireplaces, clothes dryers, and ings gasketed or sealed and fuel burning appliances draw air from the b. weather stripping has been house to operate. You must provide ad- added on openable windows and equate fresh air for these appliances. This doors and will insure proper venting of vented fuel- c. caulking or sealants are applied burning appliances. to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetra- tions for plumbing, electrical, and gas lines, and at other openings. If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 7. If your home does not meet all of the three criteria above, proceed to Deter- mining Fresh-Air Flow For Heater Lo- cation, page 6.

Continued

107097 5 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

AIR FOR COMBUSTION AND VENTILATION Continued

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this worksheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. 1. Determine the volume of the space (length x width x height). Length x Width x Height = ______cu. ft. (volume of space) Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space) If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space. 2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support. ______(volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support) Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support) 3. Add the Btu/Hr of all fuel burning appliances in the space. Vent-free heater ______Btu/Hr Example: Gas water heater* ______Btu/Hr Gas water heater 30,000 Btu/Hr Gas furnace ______Btu/Hr Vent-free heater + 30,000 Btu/Hr Vented gas heater ______Btu/Hr Total = 60,000 Btu/Hr Gas fireplace logs ______Btu/Hr Other gas appliances* + ______Btu/Hr Total = ______Btu/Hr * Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors. 4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used. ______Btu/Hr (maximum the space can support) ______Btu/Hr (actual amount of Btu/Hr used) Example: 51,200 Btu/Hr (maximum the space can support) 60,000 Btu/Hr (actual amount of Btu/Hr used) The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows: A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7. B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7. C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined. If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.

For more information, visit www.desatech.com 6 107097 OWNER’S MANUAL

AIR FOR COMBUSTION AND 12" VENTILATION Continued

VENTILATION AIR Ventilation Grills Into Adjoining Room, Ventilation Air From Inside Ventilation Option 2 Grills Or Building into Adjoining Remove Room, Door into This fresh air would come from an adjoining Option 1 Adjoining unconfined space. When ventilating to an Room, adjoining unconfined space, you must pro- Option 3 vide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 7). You can also remove door into adjoining room (see option 3, Figure 7). Follow the National Fuel 12" Gas Code, NFPA 54/ANS Z223.1, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

WARNING: Rework worksheet, adding the space of the adjoining unconfined space. The Figure 7 - Ventilation Air from Inside Building combined spaces must have enough fresh air to supply all appliances in both spaces.

Ventilation Air From Outdoors Ventilated Outlet Attic Provide extra fresh air by using ventilation Air grills or ducts. You must provide two permanent openings: one within 12" of the Outlet Air ceiling and one within 12" of the floor. To Attic Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, NFPA 54/ANS To Z223.1, Section 5.3, Air for Combustion and Crawl Ventilation for required size of ventilation Space Inlet grills or ducts. Air IMPORTANT: Do not provide openings for Inlet Air Ventilated inlet or outlet air into attic if attic has a Crawl Space thermostat-controlled power vent. Heated air entering the attic will activate the power vent. Figure 8 - Ventilation Air from Outdoors

107097 7 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

LOCATING HEATER INSTALLATION CAUTION: This heater cre- ates warm air currents. These NOTICE: This heater is intended WARNING: Maintain the mini- currents move heat to wall sur- for use as supplemental heat. Use mum clearances shown in Figure faces next to heater. Installing this heater along with your pri- 9. If you can, provide greater clear- heater next to vinyl or cloth wall mary heating system. Do not in- ances from floor, ceiling, and join- coverings or operating heater stall this heater as your primary ing wall. where impurities (such as to- heat source. If you have a central You can locate heater on floor. The op- bacco smoke, aromatic candles, heating system, you may run tional hearth base is needed. You can also cleaning fluids, oil or kerosene system’s circulating blower while install optional decorative mantels on the lamps, etc.) in the air exist, may using heater. This will help circu- heater (some mantels require the hearth discolor walls. late the heat throughout the base). IMPORTANT: Only use optional house. In the event of a power mantels and hearth base specified in this IMPORTANT: Vent-free heaters add mois- outage, you can use this heater manual. Purchase the optional mantel and ture to the air. Although this is beneficial, as your primary heat source. hearth base from your dealer. See Accesso- installing heater in rooms without enough ries, page 23. ventilation air may cause mildew to form from too much moisture. See Air for Com- WARNING: A qualified ser- The heater may also be mounted on a wall. bustion and Ventilation, pages 5 through 7. vice person must install heater. You cannot use optional mantel if mounting Follow all local codes. heater on a wall. CAUTION: If you install the heater in a home garage CHECK GAS TYPE WARNING: Never install the • heater pilot and burner must be Use only natural gas. If your gas supply is heater at least 18 inches above floor. not natural gas, do not install heater. Call • in a bedroom or bathroom • locate heater where moving ve- dealer where you bought heater for proper • in a recreational vehicle hicle will not hit it. type heater. • where curtains, furniture, clothing, or other flammable For convenience and efficiency, install heater INSTALLATION ITEMS objects are less than 42 inches • where there is easy access for operation, from the front, top, or sides of inspection, and service. Before installing heater, make sure you have the heater • in coldest part of room. the items listed below. • as a fireplace insert • piping (check local codes) • in high traffic areas An optional fan kit is available from your • sealant (resistant to propane/LP gas) • in windy or drafty areas dealer. See Accessories, page 23. If plan- ning to use fan, locate heater near an electri- • equipment shutoff valve * cal outlet. • ground joint union CEILING • test gauge connection *

• sediment trap 36" 6" Minimum • tee joint Minimum From • pipe wrench Sides Of Heater * A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable Left Right alternative to test gauge connection. Pur- Side Side chase the optional CSA design-certified Minimum to equipment shutoff valve from your dealer. Top Surface See Accessories, page 23. 3" of Carpeting, FLOOR Tile, or Other Combustible Material Figure 9 - Mounting Clearances As Viewed From Front of Heater

For more information, visit www.desatech.com 8 107097 OWNER’S MANUAL

INSTALLATION INSTALLATION OPTIONS Marking Screw Locations Continued There are three options for mounting this 1. Tape mounting bracket to wall where heater. heater will be located. Make sure mounting bracket is level. THERMOSTAT SENSING A. Mounting heater to wall BULB B. Mounting heater to optional hearth base WARNING: Maintain minimum The thermostat sensing bulb has been placed C. Mounting heater to optional mantel inside the heater for protection during shipping. clearances shown in Figure 11. If (some mantels require the hearth base) you can, provide greater clear- Locating Thermostat Sensing A. MOUNTING HEATER TO ances from floor and joining wall. Bulb WALL 2. Mark screw locations on wall (see Fig- 1. Remove front panel of heater (see Fig- ure 11). ure 2, page 3). Mounting Bracket Note: Only mark last hole on each end 2. Locate thermostat sensing bulb just The mounting bracket is located in the pack- of mounting bracket. Insert mounting under burner assembly. age tray. Remove mounting bracket from screws through these holes only. IMPORTANT: Attach thermostat sensing tray. 3. Remove tape and mounting bracket bulb to back of heater for proper operation. Methods For Attaching from wall. Mounting Bracket To Wall Attaching Thermostat Sensing 11" 16" Bulb Only use last hole on each end of mounting Min. 1. Remove thermostat sensing bulb from bracket to attach bracket to wall. These two holes are 16 inches apart from their centers. holders inside heater. Route through Only Insert Mounting Attach mounting bracket to wall in one of 18 3/4" slot opening in bottom of heater. Screws Through Last Min. Hole On Each End 2. Place clamp on thermostat sensing bulb two ways. as shown in Figure 10. Clamp is pro- 1. Attaching to wall stud Adjoining Wall vided in hardware package. 2. Attaching to wall anchor Floor 3. Snap clamp into upper mounting hole Attaching To Wall Stud: This method pro- as shown in Figure 10. Mounting hole vides the strongest hold. Insert mounting is located on lower left edge on back screws through mounting bracket and into Figure 11 - Mounting Bracket Clearances of heater. Make sure the thermostat wall studs. sensing bulb is pointing up. Attaching Mounting Bracket To Attaching To Wall Anchor: This method Wall Thermostat allows you to attach mounting bracket to Sensing Bulb hollow walls (wall areas between studs) or Note: Wall anchors, mounting screws, and to solid walls (concrete or masonry). spacers are in hardware package. The hardware package is provided with heater. Decide which method better suits your needs. Clamp Either method will provide a secure hold for Attaching To Wall Stud Method the mounting bracket. For attaching mounting bracket to wall studs. 1. Drill holes at marked locations using 9/64" drill bit. Figure 10 - Attaching Thermostat Sens- 2. Place mounting bracket onto wall. Line ing Bulb up last hole on each end of bracket with holes drilled in wall. 3. Insert mounting screws through bracket and into wall studs. 4. Tighten screws until mounting bracket is firmly fastened to wall studs.

Continued

107097 9 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

INSTALLATION Placing Heater On Mounting Installing Bottom Mounting Continued Bracket Screws 1. Locate two horizontal slots on back 1. Locate two bottom mounting holes. Attaching To Wall Anchor Method panel of heater. These holes are near bottom on back For attaching mounting bracket to hollow 2. Place heater onto mounting bracket. panel of heater (see Figure 15). walls (wall areas between studs) or solid Slide horizontal slots onto stand-out 2. Mark screw locations on wall. walls (concrete or masonry). tabs on mounting bracket. 3. Remove heater from mounting bracket. 1. Drill holes at marked locations using Horizontal Slots 4. If installing bottom mounting screws 5/16" drill bit. For solid walls (concrete into hollow or solid wall, install wall or masonry), drill at least 1" deep. anchors. Follow steps 1 through 4 un- 2. Fold wall anchor as shown in Figure 12. der Attaching To Wall Anchor Method. Stand-Out 3. Insert wall anchor (wings first) into Tab If installing bottom mounting screw hole. Tap anchor flush to wall. into wall stud, drill holes at marked lo- 4. For thin walls (1/2" or less), insert red cations using 9/64" drill bit. key into wall anchor. Push red key to 5. Replace heater onto mounting bracket. “pop” open anchor wings. 6. Place spacers between bottom mount- IMPORTANT: Do not hammer key! ing holes and wall anchor or drilled hole. For thick walls (over 1/2" thick) or solid Mounting Bracket 7. Hold spacer in place with one hand. walls, do not pop open wings. (attached to wall) With other hand, insert mounting screw 5. Place mounting bracket onto wall. Line Figure 14 - Mounting Heater Onto Mount- through bottom mounting hole and up last hole on each end of bracket with ing Bracket spacer. Place tip of screw in opening wall anchors. of wall anchor or drilled hole. 6. Insert mounting screws through bracket 8. Tighten both screws until heater is and into wall anchors. firmly secured to wall. Do not over 7. Tighten screws until mounting bracket tighten. is firmly fastened to wall. Note: Do not replace front panel at this time. Replace front panel after making gas connections and checking for leaks (see pages 12 and 13).

Figure 12 - Folding Anchor

Figure 15 - Installing Bottom Mounting Screws Figure 13 - Popping Open Anchor Wings For Thin Walls

For more information, visit www.desatech.com 10 107097 OWNER’S MANUAL

INSTALLATION Mounting Heater to Optional Securing Hearth Base to Floor Continued Hearth Base 1. Position hearth base in desired location. 1. Lay heater on its back on a table with Mark holes for drilling (See Figure 16). B. MOUNTING HEATER ON the bottom of heater overhanging the Remove hearth base. OPTIONAL HEARTH BASE edge of the table. 2. For carpeted floor, make a small cut Tools needed: 2. Remove 2 shipping screws in bottom with a sharp knife at marked locations of heater. Discard shipping screws. before drilling. • #2 Phillips screwdriver 3. Line up mounting holes on top of hearth If securing to a wood floor, drill a 3/4" • slotted screwdriver base with holes in bottom of heater (see deep hole using a 1/8" diameter drill • electric drill (if securing base to floor) Figure 16). bit. Do not use anchors in wood floors. The optional hearth base kit includes the 4. Using a Phillips screwdriver, secure If securing to a concrete floor, drill a 1 following: hearth base to heater with four sheet 3/8" deep hole using a 1/4" diameter • Hearth Base metal screws (see Figure 16). concrete drill bit. Completely insert anchors into each hole. • 4 Wood Screws 5. Stand heater up on base. 3. Mount heater to hearth base following • 4 Sheet Metal Screws 6. Place hearth insert in hearth base as shown in Figure 17. steps under Mounting Heater to Op- • Brass Base Trim tional Hearth Base. After mounting 7. Assemble brass trim (see steps 1 • Hearth Insert heater, position heater and hearth base through 7 under Assembling and At- • 4 Anchors over drilled holes. With slotted screw- taching Brass Trim, page 4). driver, secure hearth base to floor with • 2 Brass Screws 8. Slide base trim on heater base. Attach four wood screws. Note: It is an option to secure “A” model brass trim to base with two brass screws hearth base to floor. You must secure the “B” included as shown in Figure 17. and “C” model hearth bases to floor. To Bottom of Heater secure hearth base to floor, follow instruc- Shipping Screw Hearth Insert tions under Securing Hearth Base to Floor. If Base not securing hearth base to floor, proceed to Mounting Heater to Optional Hearth Base.

Screw

Mounting Holes Brass Base Trim Sheet Metal Holes for Securing Screw Figure 17- Placing Hearth Insert on Heater Heater to Floor Base and Attaching Brass Base Trim Figure 16 - Attaching Heater to Hearth Base

Continued

107097 11 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

INSTALLATION CAUTION: Use only new, CAUTION: Use pipe joint seal- Continued black iron or steel pipe. Inter- ant that is resistant to liquid pe- C. MOUNTING HEATER TO nally-tinned copper tubing may troleum (LP) gas. be used in certain areas. Check OPTIONAL MANTEL your local codes. Use pipe of 1/2" We recommend that you install a sediment See Instructions Included or greater diameter to allow trap in supply line as shown in Figure 18. With Mantel Kit. proper gas volume to heater. If Locate sediment trap where it is within pipe is too small, undue loss of reach for cleaning. Install in piping system Assembling Mantel pressure will occur. between fuel supply and heater. Locate sediment trap where trapped matter is not likely IMPORTANT: Only use the optional man- Installation must include an equipment to freeze. A sediment trap traps moisture tels specified in this manual. See Accesso- shutoff valve, union, and plugged 1/8" NPT and contaminants. This keeps them from ries, page 23 for proper mantel kits. This tap. Locate NPT tap within reach for test going into heater controls. If sediment trap heater is only approved for use with models gauge hook up. NPT tap must be upstream is not installed or is installed wrong, heater GMF800/GMU801 series, GM900F/ from heater (see Figure 18). may not run properly. GM901U series, GM902F/GM903U series, IMPORTANT: Install an equipment shutoff GM700F/GM701U series, and GM702F/ IMPORTANT: Hold pressure regulator with valve in an accessible location. The equip- GM703U series mantel kits. Using any other wrench when connecting it to gas piping ment shutoff valve is for turning on or mantel will void the CSA approval for this and/or fittings. shutting off the gas to the appliance. heater. Only use models GMF800/GMU801 series, GM900F/GM901U series, GM902F/ Apply pipe joint sealant lightly to male GM903U series, GM700F/GM701U series, threads. This will prevent excess sealant and GM702F/GM703U series mantels with from going into pipe. Excess sealant in pipe this heater. Do not use these mantels with could result in clogged heater valves. any other product. Note: Burner bracket not CONNECTING TO GAS Pressure shown for clarity Regulator SUPPLY

WARNING: This appliance re- 3/8" NPT Pipe Nipple quires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator. Ground Tee Joint Union Heater Cabinet WARNING: A qualified service Joint person must connect heater to gas Reducer supply. Follow all local codes. Bushing to Equipment Shutoff Test Gauge Valve * Connection * 1/8" NPT From Gas Meter WARNING: Never connect 1/8" NPT (5" W.C. to 10.5" Plug Tap heater to private (non-utility) gas W.C. Pressure) wells. This gas is commonly known as wellhead gas. Tee Joint

IMPORTANT: Check gas line pressure be- Sediment Pipe 3" Minimum fore connecting heater to gas line. Gas line Trap Nipple pressure must be no greater than 14 inches Cap of water. If gas line pressure is higher, heater regulator damage could occur. Figure 18 - Gas Connection * A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 23.

For more information, visit www.desatech.com 12 107097 OWNER’S MANUAL

INSTALLATION Test Pressures Equal To or Less Than Pressure Testing Heater Gas 1/2 PSIG (3.5 kPa) Continued Connections 1. Close equipment shutoff valve (see Fig- 1. Open equipment shutoff valve (see Fig- CHECKING GAS ure 19). ure 19). CONNECTIONS 2. Pressurize supply piping system by 2. Open main gas valve located on or near either using compressed air or open- gas meter. WARNING: Test all gas piping main gas valve located on or near gas meter. 3. Make sure control knob of heater is in ing and connections for leaks the OFF position. after installing or servicing. Cor- 3. Check all joints from gas meter to rect all leaks at once. equipment shutoff valve (see Figure 4. Check all joints from equipment shutoff 20). Apply mixture of liquid soap and valve to thermostat gas valve (see Fig- ure 20). Apply mixture of liquid soap WARNING: Never use an open water to gas joints. Bubbles forming show a leak. and water to gas joints. Bubbles form- flame to check for a leak. Apply a ing show a leak. mixture of liquid soap and water 4. Correct all leaks at once. 5. Correct all leaks at once. to all joints. Bubbles forming show a leak. Correct all leaks at once. Equipment 6. Light heater (see Operating Heater, OpenON Shutoff POSITION pages 14 and 15). Check all other in- Pressure Testing Gas Supply Valve ternal joints for leaks. Piping System 7. Turn off heater (see To Turn Off Gas to Test Pressures In Excess Of 1/2 PSIG Appliance, page 14). (3.5 kPa) 8. Replace front panel.

OFF 1. Disconnect appliance with its appliance POSITIONClosed main gas valve (control valve) and equipment shutoff valve from gas supply pip- Figure 19 - Equipment Shutoff Valve ing system. Pressures in excess of 1/2 psig Thermostat Gas will damage heater regulator. Valve Location 2. Cap off open end of gas pipe where equipment shutoff valve was connected. 3. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter. 4. Check all joints of gas supply piping Gas Meter system. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak. Equipment 5. Correct all leaks at once. Shutoff 6. Reconnect heater and equipment Valve shutoff valve to gas supply. Check re- connected fittings for leaks.

Figure 20 - Checking Gas Joints

107097 13 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

OPERATING LIGHTING 7. Keep control knob pressed in for 30 INSTRUCTIONS seconds after lighting pilot. After 30 HEATER seconds, release control knob. 1. STOP! Read the safety information • If control knob does not pop up FOR YOUR SAFETY in column 1. when released, contact a qualified READ BEFORE 2. Make sure equipment shutoff valve service person or gas supplier for LIGHTING is fully open. repairs. 3. Turn control knob clockwise Note: If pilot goes out, repeat steps 3 through 7. This heater has a safety WARNING: If you do not fol- to the OFF position. interlock system. Wait one (1) minute low these instructions exactly, a 4. Wait five (5) minutes to clear out any before lighting pilot again. fire or explosion may result caus- gas. Then smell for gas, including ing property damage, personal near the floor. If you smell gas, 8. Turn control knob counterclockwise injury or loss of life. STOP! Follow “B” in the safety in- to desired heating level. The formation, column 1. If you don’t main burner should light. Set control A. This appliance has a pilot which must smell gas, go to the next step. knob to any heat level between HI and LO. be lighted by hand. When lighting the 5. Turn control knob counterclockwise pilot, follow these instructions exactly. to PILOT position. Press in B. BEFORE LIGHTING smell all control knob for five (5) seconds (see CAUTION: Do not try to adjust around the appliance area for gas. Be Figure 21). heating levels by using the equip- sure to smell next to the floor because Note: You may be running this ment shutoff valve. some gas is heavier than air and will heater for the first time after hook- settle on the floor. ing up to gas supply. If so, the con- Thermocouple WHAT TO DO IF YOU SMELL trol knob may need to be pressed in Ignitor Electrode GAS for 30 seconds. This will allow air to Pilot Burner • Do not try to light any appliance. bleed from the gas system. • Do not touch any electric switch; do 6. With control knob pressed in, push not use any phone in your building. down and release ignitor button. • Immediately call your gas supplier This will light pilot. The pilot is at- from a neighbor’s phone. Follow tached to the front of burner. If the gas supplier’s instructions. needed, keep pressing ignitor but- • If you cannot reach your gas sup- ton until pilot lights. plier, call the fire department. Note: If pilot does not stay lit, refer Figure 22 - Pilot C. Use only your hand to push in or turn to Troubleshooting, pages 16 through TO TURN OFF GAS the gas control knob. Never use tools. 18. Also contact a qualified service If the knob will not push in or turn person or gas supplier for repairs. TO APPLIANCE by hand, don’t try to repair it, call a Until repairs are made, light pilot with Shutting Off Heater qualified service technician or gas match. To light pilot with match, see supplier. Force or attempted repair Manual Lighting Procedure, page 15. 1. Turn control knob clockwise may result in a fire or explosion. to the OFF position. D. Do not use this appliance if any part Ignitor Button 2. Turn off all electric power to the ap- has been under water. Immediately Control Knob pliance if service is to be performed. call a qualified service technician to inspect the appliance and to replace Shutting Off Burner Only (pilot

PILOT stays lit) any part of the control system and OFF HI any gas control which has been un- Turn control knob clockwise to der water. IGNITOR the PILOT position.

Figure 21 - Control Knob In The OFF Position

For more information, visit www.desatech.com 14 107097 OWNER’S MANUAL

OPERATING INSPECTING BURNER FLAME PATTERN HEATER BURNER Figure 25 shows a correct burner flame pattern. Figure 26 shows an incorrect burner Continued Check pilot flame pattern and burner flame flame pattern. The incorrect burner flame THERMOSTAT pattern often. pattern shows yellow tipping of the flame. It also shows the flame higher than one CONTROL OPERATION PILOT FLAME PATTERN inch above the log. The thermostatic control used on this Figure 23 shows a correct pilot flame pattern. Note: When using the heater the first time, heater differs from standard thermostats. Figure 24 shows an incorrect pilot flame the flame will be yellow for approximately Standard thermostats simply turn on and pattern. The incorrect pilot flame is not touch- one hour until the log cures. off the burner. The thermostat used on ing the thermocouple. This will cause the this heater senses the room temperature. thermocouple to cool. When the thermo- The thermostat adjusts the amount of gas couple cools, the heater will shut down. WARNING: If yellow tipping flow to the burner. This increases or de- occurs, your heater could pro- creases the burner flame height. At times If pilot flame pattern is incorrect, as shown duce increased levels of carbon the room may exceed the set temperature. in Figure 24 monoxide. If burner flame pat- If so, the burner will shut off. The burner • turn heater off (see To Turn Off Gas to tern shows yellow tipping, follow will cycle back on when room temperature Appliance, page 14) instructions, bottom of this page. drops below the set temperature. • see Troubleshooting, pages 16 through 18 NOTICE: Do not mistake orange The control knob can be set to any heat Thermocouple level between HI and LO. flames with yellow tipping. Dirt Pilot Burner or other fine particles enter the Note: The thermostat sensing bulb mea- heater and burn causing brief sures the temperature of air near the patches of orange flame. heater cabinet. This may not always agree with room temperature (depending on If burner flame pattern is incorrect, as shown housing construction, installation loca- in Figure 26 tion, room size, open air temperatures, • turn heater off (see To Turn Off Gas to etc.). Frequent use of your heater will let Appliance, page 14) you determine your own comfort levels. Figure 23 - Correct Pilot Flame Pattern • see Troubleshooting, pages 16 through 18 MANUAL LIGHTING PROCEDURE Thermocouple Top of Flame Even With Top of Log Pilot Burner 1. Remove front panel (see Figure 2, page 3). 2. Follow steps 1 through 5 under Light- ing Instructions, page 14. 3. With control knob pressed in, strike match. Hold match to pilot until pilot lights. Figure 24 - Incorrect Pilot Flame Pattern Figure 25 - Correct Burner Flame Pattern 4. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 Yellow Tipping seconds, release control knob. Now follow step 8 under Lighting Instruc- tions, page 14. 5. Replace front panel.

Figure 26 - Incorrect Burner Flame Pattern

107097 15 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug heater and let cool before needle, or similar object to clean Note: For additional help, visit DESA servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ International’s technical service web site vice person should service and pilot unit. at www.desatech.com. repair heater. Note: All troubleshooting items are listed in order of operation.

OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no 1. Ignitor electrode positioned wrong 1. Replace ignitor spark at ODS/pilot 2. Ignitor electrode broken 2. Replace ignitor 3. Ignitor electrode not connected to igni- 3. Reconnect ignitor cable tor cable 4. Ignitor cable pinched or wet 4. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry 5. Piezo ignitor nut is loose 5. Tighten nut holding piezo ignitor to heater cabinet. Nut is located inside heater cabinet at top 6. Broken ignitor cable 6. Replace ignitor cable 7. Bad piezo ignitor 7. Replace piezo ignitor

When ignitor button is pressed, there is 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment spark at ODS/pilot but no ignition shutoff valve closed shutoff valve 2. Control knob not in PILOT position 2. Turn control knob to PILOT position 3. Control knob not pressed in while in 3. Press in control knob while in PILOT PILOT position position 4. Air in gas lines when installed 4. Continue holding down control knob. Repeat igniting operation until air is removed 5. ODS/pilot is clogged 5. Clean ODS/pilot (see Cleaning and Maintenance, page 19) or replace ODS/ pilot assembly 6. Gas regulator setting is not correct 6. Replace gas regulator

ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in 1. Press in control knob fully control knob is released 2. Control knob not pressed in long enough 2. After ODS/pilot lights, keep control knob pressed in 30 seconds 3. Safety interlock system has been triggered 3. Wait one minute for safety interlock system to reset. Repeat ignition operation 4. Equipment shutoff valve not fully open 4. Fully open equipment shutoff valve 5. Thermocouple connection loose at con- 5. Hand tighten until snug, then tighten 1/4 trol valve turn more 6. Pilot flame not touching thermocouple, 6. A) Contact local natural gas company which allows thermocouple to cool, causing pilot flame to go out. This prob- B) Clean ODS/pilot (see Cleaning and lem could be caused by one or both of Maintenance, page 19) or replace ODS/ the following: pilot assembly A) Low gas pressure B) Dirty or partially clogged ODS/pilot 7. Thermocouple damaged 7. Replace thermocouple 8. Control valve damaged 8. Replace control valve

www.desatech.com

For more information, visit www.desatech.com 16 107097 OWNER’S MANUAL

TROUBLESHOOTING Continued

OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean burner (see Cleaning and Mainte- nance, page 19) or replace burner orifice 2. Burner orifice diameter is too small 2. Replace burner orifice 3. Inlet gas pressure is too low 3. Contact local natural gas company

Delayed ignition of burner 1. Manifold pressure is too low 1. Contact local natural gas company 2. Burner orifice is clogged 2. Clean burner (see Cleaning and Mainte- nance, page 19) or replace burner orifice

Burner backfiring during combustion 1. Burner orifice is clogged or damaged 1. Clean burner (see Cleaning and Mainte- nance, page 19) or replace burner orifice 2. Burner damaged 2. Replace burner 3. Gas regulator defective 3. Replace gas regulator

Yellow flame during burner combustion 1. Not enough air 1. Check burner for dirt and debris. If found, clean burner (see Cleaning and Maintenance, page 19) 2. Gas regulator defective 2. Replace gas regulator

Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of operation

Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO position and burner is lit when burner is cold let warm up for a minute 2. Air in gas line 2. Operate burner until air is removed from line. Have gas line checked by local natural gas company 3. Air passageways on heater blocked 3. Observe minimum installation clearances (see Figure 9, page 8) 4. Dirty or partially clogged burner orifice 4. Clean burner (see Cleaning and Mainte- nance, page 19) or replace burner orifice

White powder residue forming within burner 1. When heated, vapors from furniture pol- 1. Turn heater off when using furniture box or on adjacent walls or furniture ish, wax, carpet cleaners, etc. turn into polish, wax, carpet cleaners, or similar white powder residue products

www.desatech.com Continued

107097 17 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

TROUBLESHOOTING Continued

WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department.

IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors.

OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces a clicking/ticking noise 1. Metal expanding while heating or con- 1. This is common with most heaters. If just after burner is lit or shut off tracting while cooling noise is excessive, contact qualified service person

Heater produces unwanted odors 1. Heater burning vapors from paint, hair 1. Ventilate room. Stop using odor caus- spray, glues, etc. (see IMPORTANT ing products while heater is running statement above) 2. Gas leak. See Warning statement at 2. Locate and correct all leaks (see Check- top of page ing Gas Connections, page 13)

Heater shuts off in use (ODS operates) 1. Not enough fresh air is available 1. Open window and/or door for ventilation 2. Low line pressure 2. Contact local natural gas company 3. ODS/pilot is partially clogged 3. Clean ODS/pilot (see Cleaning and Maintenance, page 19)

Gas odor even when control knob is in OFF 1. Gas leak. See Warning statement at 1. Locate and correct all leaks (see Check- position top of page ing Gas Connections, page 13) 2. Control valve defective 2. Replace control valve

Gas odor during combustion 1. Foreign matter between control valve 1. Take apart gas tubing and remove for- and burner eign matter 2. Gas leak. See Warning statement at 2. Locate and correct all leaks (see Check- top of page ing Gas Connections, page 13)

www.desatech.com

For more information, visit www.desatech.com 18 107097 OWNER’S MANUAL

CLEANING AND 4. Check the injector holder located at the REPLACEMENT end of the burner tube again. Remove MAINTENANCE any large particles of dust, dirt, lint, or PARTS pet hairs with a soft cloth or vacuum cleaner nozzle. Note: Use only original replacement parts. WARNING: Turn off heater This will protect your warranty coverage for and let cool before cleaning. 5. Blow air into the primary air holes on parts replaced under warranty. the injector holder. CAUTION: You must keep 6. In case any large clumps of dust have PARTS UNDER WARRANTY now been pushed into the burner repeat control areas, burner, and circu- Contact authorized dealers of this product. steps 3 and 4. lating air passageways of heater If they can’t supply original replacement clean. Inspect these areas of Clean the pilot assembly also. A yellow tip part(s), call DESA International’s Techni- heater before each use. Have on the pilot flame indicates dust and dirt in cal Service Department at 1-800-323-5190 heater inspected yearly by a quali- the pilot assembly. There is a small pilot air for referral information. fied service person. Heater may inlet hole about two inches from where the When calling DESA International, have ready need more frequent cleaning due pilot flame comes out of the pilot assembly to excessive lint from carpeting, (see Figure 28). With the unit off, lightly • your name pet hair, bedding material, etc. blow air through the air inlet hole. You may • your address blow through a drinking straw if compressed • model and serial numbers of your heater air is not available. CLEANING BURNER • how heater was malfunctioning INJECTOR HOLDER AND Ports/Slots • type of gas used (propane/LP or natural gas) Injector PILOT AIR INLET HOLE Holder • purchase date The primary air inlet holes allow the proper Primary Air Inlet Hole Usually, we will ask you to return the defec- amount of air to mix with the gas. This tive part to the factory. provides a clean burning flame. Keep these holes clear of dust, dirt, lint, and pet hair. PARTS NOT UNDER Clean these air inlet holes prior to each Burner WARRANTY heating season. Blocked air holes will cre- Tube ate soot. We recommend that you clean the Contact authorized dealers of this product. unit every three months during operation If they can’t supply original replacement and have heater inspected yearly by a quali- part(s), call DESA International’s Parts fied service person. Department at 1-800-972-7879 for referral Figure 27 - Injector Holder On Outlet information. We also recommend that you keep the burner Burner Tube tube and pilot assembly clean and free of When calling DESA International, have ready dust and dirt. To clean these parts we recom- Pilot Air Inlet Hole • model number of your heater mend using compressed air no greater than • the replacement part number 30 PSI. Your local computer store, hardware store, or home center may carry compressed air in a can. You can use a vacuum SERVICE HINTS cleaner in the blow position. If using compressed air in a can, please follow the direc- When Gas Pressure Is Too Low tions on the can. If you don't follow direc- Pilot Assembly • pilot will not stay lit tions on the can, you could damage the pilot • burner(s) will have delayed ignition assembly. Figure 28 - Pilot Inlet Air Hole • heater will not produce specified heat 1. Shut off the unit, including the pilot. Allow the unit to cool for at least thirty CABINET When Gas Quality Is Bad minutes. Air Passageways • pilot will not stay lit 2. Inspect burner, pilot, and primary air • burner(s) will produce flames and soot inlet holes on injector holder for dust • Use a vacuum cleaner or pressurized air and dirt (see Figure 27). to clean. • heater will backfire when lit 3. Blow air through the ports/slots and Exterior You may feel your gas pressure is too low or holes in the burner. gas quality is bad. If so, contact your local • Use a soft cloth dampened with a mild natural gas supplier. soap and water mixture. Wipe the cabinet to remove dust.

107097 19 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

ILLUSTRATED PARTS 27 BREAKDOWN 24 8

VMH3000TNA 25 23 7

26 10 20 6 16 13 18 12 14 6 5 10 17 9 11

21 1 15 1 1 28 22

3 1 19 4

2 1

For more information, visit www.desatech.com 20 107097 OWNER’S MANUAL

PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. VMH3000TNA

KEY VMH3000TNA NO. PART NO. DESCRIPTION QTY.

1 098304-01 Screw, #10 x 3/8" 19 2 100566-01CK Front Panel 1 3 100573-01BR Screen Assembly 1 4 100568-02 Burner Shield 1 5 107122-01 Log, Service Kit 1 6 098303-02 Screw, #8 x 3/8" 4 7 099066-01 Mounting Bracket 1 8 M11084-26 Screw, #10 x 3/8" 3 9 107058-01 Deflector Unit 1 10 098271-03 Ignitor Cable 1 11 098249-01 Nut, M5 2 12 107485-01 ODS/Pilot Assembly 1 13 103447-01 Burner 1 14 099387-03 3/16" Pilot Tubing 1 15 103845-12 Injector 1 16 NJF-8C Nut, Hex 1 17 099415-11 Pressure Regulator 1 18 103408-01 Burner Bracket 2 19 103255-01 3/8" Outlet (Burner) Tubing 1 20 103256-01 3/8" Inlet Tubing 1 21 107218-01 Deflector Baffle 1 22 107060-01 Log Strap 2 23 098522-12 Thermostat Gas Valve 1 24 105556-01 Cabinet 1 25 097159-04 Piezo Ignitor 1 26 099211-01 Screw, #10 x 2.5" 2 27 104373-02 Baffle 1 28 107061-01 Hood 1

PARTS AVAILABLE — NOT SHOWN

100562-01 Lighting Instructions Plate 1 100563-01 Warning Plate 1 101899-01 Brass Trim Assembly 1 100769-02 Brass Trim Hardware 1 100642-01 Hardware Package 1 100565-01 Warning Plate Fastener Kit 1 101416-44 Instructional Video 1

107097 21 For more information, visit www.desatech.com ¨ NATURAL GAS RESIDENTIAL HEATERS

SPECIFICATIONS TECHNICAL Btu (Variable) 15,000/30,000 SERVICE Type Gas Natural Only You may have further questions about in- Ignition Piezo stallation, operation, or Trouble Shooting. Pressure Regulator Setting 3" W.C. If so, contact DESA International’s Techni- Inlet Gas Pressure (in. of water) * cal Service Department at 1-800-323-5190. Maximum 10.5" Minimum 5" You can also visit DESA International’s technical service web site at Dimensions, Inches (H x W x D) www.desatech.com. Heater 23.75 x 25.9 x 8.5 Carton 25.8 x 28.7 x 10.1 Weight (pounds) Heater 29 Shipping 35 * For purposes of input adjustment

For more information, visit www.desatech.com 22 107097 OWNER’S MANUAL

ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories call DESA International’s Sales Department at 1-800-458-2472 for information. You can also write to the address listed on the back page of this manual.

HEARTH BASE - GHB802 Series PREMIER MANTEL Unfinished - GM903U Series For locating heater on the floor. Includes brass trim. Complete installation instruc- Finished - GM902F Series tions included. White Lacquer Finish - GM904W EQUIPMENT SHUTOFF (differs slightly from illustration) VALVE - GA5010 For use with heater. Features a built-in base. Equipment shutoff valve with 1/8" NPT tap. Sturdy hardwood construction with classic styling and attractive molding. Available in a walnut finish or an unfinished hardwood, ready to stain or paint. Complete assembly and installation instructions included.

FAN KITS CORNER MANTEL GA3100A - Manually- Unfinished - GM703U Series Controlled Finished - GM702F Series GA3200TA - Thermostatically- For use with heater. Features a built-in base. Controlled Space-saving corner design featuring clean, Provides better heat distribution. Makes classic lines. Available in a walnut finish or heater more efficient. Complete installation an unfinished hardwood, ready to stain or and operating instructions included. paint. Complete assembly and installation instructions included. CLEANING KIT - GCK (Not Shown) Your vent-free gas appliance requires regu- lar cleaning and maintenance to prevent performance problems. This kit gives you the tools and instructions to make it easy to clean all critical areas of your appliance.

107097 23 For more information, visit www.desatech.com WARRANTY INFORMATION

KEEP THIS WARRANTY

Model ______

Serial No. ______

Date Purchased ______

Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied.

LIMITED WARRANTY VENT-FREE NATURAL GAS LOG HEATERS

DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented. This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA International who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit. This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner. TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTA- BILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSO- EVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights that vary from state to state. For information about this warranty write:

INTERNATIONAL 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com

107097 01 107097-01 Rev. A NOT A UPC 05/00