AIR HANDLER INSTALLATION INSTRUCTIONS Table of Contents AIR HANDLER SAFETY

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AIR HANDLER INSTALLATION INSTRUCTIONS Table of Contents AIR HANDLER SAFETY ...... 1 INSTALLATION INSTRUCTIONS ...... 5 INSTALLATION REQUIREMENTS ...... 2 Inspect Shipment ...... 5 Tools and Parts ...... 2 Install Condensate Drain Pan...... 6 Outdoor System Requirements ...... 2 Install Duct Work ...... 7 Location Requirements...... 2 Filter Specifications ...... 7 Installation Configurations ...... 3 Verify Orifice Size ...... 7 Airflow Conversion ...... 3 Connect Refrigerant Lines ...... 7 Drain Pan Connections ...... 4 Make Electrical Connections ...... 8 Electrical Requirements ...... 5 Complete Installation...... 12 Duct Work Requirements...... 5 SEQUENCE OF OPERATION ...... 14 AIR HANDLER MAINTENANCE ...... 14 ASSISTANCE OR SERVICE...... 14 Accessories ...... 14 AIR HANDLER SAFETY

Your safety and the safety of others are very important. We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages. This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety alert symbol and either the word “DANGER” or “WARNING.” These words mean:

You can be killed or seriously injured if you don't immediately follow instructions.

You can be killed or seriously injured if you don't follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can happen if the instructions are not followed.

065682400 Outdoor System Requirements INSTALLATION The air handler is designed to match, and must be used with, outdoor units as rated. The indoor sections are manufactured REQUIREMENTS with an interchangeable refrigerant metering orifice to provide optimum refrigerant control and system performance with a These instructions are intended as a general guide only and do variety of different capacities of outdoor units. not supersede any national or local codes in any way. In some cases, the outdoor unit may require a refrigerant Compliance with all local, state, or national codes pertaining to metering orifice change to obtain rated performance. this type of equipment should be determined prior to installation. Read this entire instruction manual, as well as the instructions supplied in separate equipment, before starting the installation. Location Requirements All models are designed for indoor installation only. The installation of the air handler, field wiring, warm air ducts, etc. must conform to the requirements of the National Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States, and any state laws, and local ordinances (including plumbing or wastewater codes). Local authorities having jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence over the general instructions in this manual. Install the conditioned air plenum, ducts and air filters (not provided) in accordance with NFPA 90B Standard for the Explosion Hazard Installation of Warm Air Heating and Air-Conditioning Systems (latest edition). Keep flammable materials and vapors, such as gasoline, away from air handler. The air handler is provided with flanges for the connection of the plenum and ducts. Place air handler so that heating elements are at least Air Filters must be listed as Class 2 furnace air filters. 18 inches (46 cm) above the floor for a garage installation. The air handler is shipped from the factory completely assembled, configured for upflow or horizontal right-hand Failure to follow these instructions can result in death, discharge. For downflow (counterflow) or horizontal left-hand explosion, or fire. discharge, some field modifications and/or kits may be required. See the “Accessories” section. NOTE: When used on cooling applications, excessive sweating Do not remove the cabinet knockouts until it has been may occur when the air handler is installed in a very humid determined which knockouts will need to be removed for the space. installation. ■ If installed in an unconditioned space, sealant should be Select the final installation position which best suits the site applied around the electrical wires, refrigerant tubing, and conditions. Consider required clearances, space, routing condensate lines where they enter the cabinet. requirements for refrigerant line, condensate disposal, filters, duct work, wiring, and accessibility for service. Refer to the air ■ Electrical wires should be sealed on the inside where they exit handler rating plate on the air handler for specific information. the conduit opening. Sealant is required to prevent air leakage into and condensate from forming inside the air handler, control box, and on electrical controls. Tools and Parts ■ The air handler must be installed in such a way as to allow Assemble the required tools and parts before starting installation. free access to the coil/filter compartment and blower/control Read and follow the instructions provided with any tools listed compartment. here. ■ The air handler must be installed in a level position to ensure Tools Needed: proper condensate drainage. ■ ¹⁄₄ in. Nut driver ■ Tape measure ■ Level ■ Hammer ■ Screwdriver ■ Sealant ■ Adjustable wrench

Parts Supplied: ■ Replacement orifice package Parts Needed: Check local codes, check existing electrical supply, and read “Duct Work Requirements,” and “Electrical Requirements,” before purchasing parts. ■ U.L. listed wire nuts

2 Suspended Cabinet Installation Installation Clearances NOTE: Air handler cannot be installed horizontally lying on or suspended from either the front or back of the air handler. They Non-Ducted Return Closet Installation must be positioned with one side parallel to the floor (the side The air handler can be installed in a closet with a false bottom to closest to the floor) when in the horizontal position. form a return air plenum or be installed with a return air plenum The suspending means must be field fabricated, and should under the air handler. consist of two “cradles” made by attaching two rods to a length Louvers or return air grilles are field supplied. Local codes may of angle iron or suitable gauge steel. limit application of systems without a ducted return to single- Installation Configuration Options story buildings. ■ Install louvers in a closet. Use the “Filter Requirements Chart” Shading indicates proper line connections to determine the opening size that will provide the amount of Upflow Counterflow As shipped from the factory Field converted with kit free air you will require. If using louvers or grilles, match the (return in bottom) (return in top) free area rating of the louver or grille to the Minimum Return Air Free Area you determined to be necessary by consulting 4 the “Filter Requirements Chart.” ■ If the free area is not known, assume a 25% free area for wood or a 75% free area for metal louvers or grilles. Suction ■ If the return air plenum is used, the return air grille should be 1 Liquid 1 immediately in front of the opening in the plenum to allow for 2 3 the free flow of return air. Either drain set may be used ■ When not installed in front of the opening, there must be adequate clearance around the air handler to allow for the free flow of return air.

Suction 1 Liquid 1 Installation Configurations 2 3 4 For ease in installation, it is best to make any necessary coil Either drain set may be used configuration changes before setting air handler in place. See “Installation Configuration Options.”

1. Optional drain connections 3. Right hand drain Vertical Installations (for horizontal installations) connections 2. Left hand drain 4.Bottom/Filter frame Upflow connections The air handler must be supported on the bottom only and set on solid floor or field supplied supporting frame. Securely attach the . air handler to the floor or supporting frame. Horizontal Right Counterflow Factory ready A vertical upflow air handler may be converted to vertical downflow (counterflow). A kit is required for this conversion. See “Airflow Conversion” section. Suction Liquid Horizontal Installations Drains Horizontal installations can be left-hand or right-hand air supply. Adequate support must be provided to insure cabinet integrity. Ensure that there is adequate room to remove service and access A panels if installing in the horizontal position. For correct horizontal coil installation, see “Installation Configuration Options.” . IMPORTANT: Horizontal Left Right to Left Airflow - Requires drain pan location change ■ When an evaporator coil is installed in an attic or above a finished ceiling, an auxiliary drain pan should be provided under the air handler as specified by most local building codes. This coil is provided with a secondary drain that should be trapped and piped to a location that will give the Liquid Suction occupant a visual warning that the primary drain is clogged. See “Connect Condensate Drain.” Drains Conversion from Vertical to Horizontal A vertical upflow or vertical downflow air handler may be B converted to horizontal by removing the indoor coil and installing a horizontal drain pan on the coil for right-hand or left-hand air supply. Airflow Conversion Accessory kit ADKTM is required to convert this air handler to counterflow. See “Accessory “section. Refer to the instructions provided with the accessory kit for proper installation.

3 Before Conversion Drain Pan Connections 4 All models come from the factory with center refrigerant connections and left or right drain connections in the vertical position. See “Installation Configuration Options.” 3 Horizontal Installations can be either “Right” as pictured, or “Left”. 2 5 IMPORTANT: Counterflow Converted Air Handlers should not be 1 installed horizontally. For Horizontal Right Installations, use drain connections marked “A”, as shown.

Horizontal Right Factory ready

1. Top cap 4. Side drain pan

Suction 2. Blower 5. Bottom drain pan Liquid 3. Support bracket

Drains 1. Remove and set aside front panels. 2. Carefully remove coil assembly and bottom drain pan as one assembly from the air handler. A 3. Remove the 4 screws that attach the top cap and support For Horizontal Left Installations, a drain pan location change is bracket. required. Use drain pan connections “B” as shown. 4. Rotate the support bracket to other side. Horizontal Left 5. Using the 4 screws removed in Step 3, reinstall the top cap. Right to Left Airflow - Requires drain pan location change 6. Move side drain pan to the opposite side. 7. Install modified coil assembly back into air handler in the same orientation that it was in previously. After Conversion Liquid Suction 4 Drains

3 B

Follow the steps below to modify your drain pan for Horizontal 2 5 Left configuration. 1

1. Top cap 4. Side drain pan 2. Blower 5. Bottom drain pan 3. Support bracket 8. Determine knockouts required for drain line connections, knock out and install drain lines. 9. Replace the front panels.

4 Electrical Requirements INSTALLATION WARNING INSTRUCTIONS

Inspect Shipment WARNING Electrical Shock Hazard Electrically ground air handler. Excessive Weight Hazard Use two or more people to move and install air handler. Connect ground wire to ground terminal marked “GND”. Failure to do so can result in back or other injury. Failure to do so can result in death or electrical shock.

NOTE: Use copper conductors only. These air handlers are completely factory assembled, and all components are performance tested. Each unit consists of a ■ All field wiring must be done in accordance with National blower assembly, refrigerant coil, and controls, in an insulated Electrical Code, applicable requirements of UL and local galvanized factory finished enclosure. Knockouts are provided for codes, where applicable. electrical wiring entrance ■ Electrical wiring, disconnect means and over-current 1. Check the unit rating plate to confirm specifications are as protection are to be supplied by the installer. Refer to the air ordered. handler rating plate for maximum over-current protection, 2. Upon receipt of equipment, carefully inspect it for possible minimum circuit ampacity, as well as operating voltage. shipping damage. Take special care to examine the unit ■ The power supply must be sized and protected according to inside the carton if the carton is damaged. the specifications supplied on the product. If damage is found, it should be noted on the carrier’s freight bill. ■ This air handler is factory configured for 240 Volt, single Damage claims should be filed with the carrier immediately. phase, 60 cycles. For 208 Volt applications, see “208 Volt Claims of shortages should be filed with the seller within 5 days. Conversion” in the “Make Electrical Connections” section. NOTE: If any damages are discovered and reported to the carrier, do not install the unit as your claim may be denied. ■ For optional Electric Heater applications, see “Accessories.” Refer to the instructions provided with the accessory for proper installation. Duct Work Requirements ■ Install the conditioned air plenum, ducts and air filters (not provided) in accordance with NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition). ■ The air handler is provided with flanges for the connection of the plenum and ducts. ■ Air Filters must be listed as Class 2 furnace air filters. ■ Supply and return duct work must be adequately sized to meet the system’s air requirements and static pressure capabilities. Duct work should be insulated with a minimum of 1 in. thick insulation with a vapor barrier in conditioned areas or 2 in. minimum in unconditioned areas. ■ Supply plenum should be the same size as the flanged opening provided around the blower outlet and should extend ideally at least 3 ft from the air handler before turning or branching off plenum into duct runs.The plenum forms an extension of the blower housing and minimizes air expansion losses from the blower.

5 Typical Condensate Drain Connection Install Condensate Drain Pan (secondary drain not shown) The air handler is provided with ³⁄₄ in. NPT condensate drain connections. A field-fabricated auxiliary drain pan, with a drain pipe to the 2 outside of the building, is required in all installations over a 1 finished living space or in any area that may be damaged by 3 overflow from the main drain pan. In some localities, local codes 1.00" Min. 4 may require an auxiliary drain pan for any horizontal installation. 12.00" Make sure unit is level so that the drain pan will empty completely 3.00" Min. without water standing in the pan. Max. 1. Remove the appropriate drain knockouts. See “Drain Pan 5 Connections” section. You may need to remove the indoor coil assembly from the cabinet. 1. Air Handler 4. Anti-siphon air vent (for horizontal runs 2. Drain connection of 15’ or longer) 2. Remove any web from inside any threaded drain pan hole to 3. Drain line 5. Drain trap which a drain line is to be connected. Use care when removing the web so as not to damage the coil. NOTE: Do not operate air handler without a drain trap. The 3. Connect primary drain line connection to the primary drain condensate drain is on the negative pressure side of the blower; pan connection. The primary drain connection is flush with therefore, air being pulled through the condensate line will the bottom of the inside of the pan. Secondary connection is prevent positive drainage without a proper trap. raised above the bottom of the inside of the pan. 6. Route the drain line to the outside or to an appropriate drain. NOTE: When making drain fitting connections to the drain Drain lines must be installed so they do not block service pan, hand tighten. Using a sealant is recommended. access to the front of the air handler. A 24 in. clearance is Overtightening the fittings can split connections on the drain required for filter, coil, or blower removal and service access. pan. NOTE: Check local codes before connecting the drain line to 4. Secondary drain connections, if used, should be connected an existing drainage system. to a separate drainage system. Run the auxiliary drain line to 7. Insulate the drain lines where sweating could cause water a place where the occupant would notice if water started damage. coming from the auxiliary drain. Test condensate drain pan and drain line after installation: 5. Install a 3 in. trap in both the primary and secondary drain lines as close to the unit as practical. Make sure the top of the 1. Pour several quarts of water into drain pan, enough to fill trap is below the connection to the drain pan to allow drain trap and line. complete drainage of the pan. 2. Check to make sure the drain pan is draining completely, no NOTE: Horizontal runs over 15 ft long must also have an anti- leaks are found in drain line fittings, and water is draining siphon air vent (stand pipe) installed ahead of the horizontal from the end of the primary drain line. run. See “Typical Condensate Drain Connection.” An 3. Correct any leaks found. extremely long horizontal run may require an oversized drain line to eliminate air trapping.

6 Install Duct Work Verify Orifice Size IMPORTANT: IMPORTANT: The proper orifice size is dependent on indoor coil/ ■ Install duct work in accordance with NFPA 90B and any local outdoor unit combination and application. codes. 1. Consult the outdoor unit information to determine if the indoor unit has the correct orifice installed. ■ Connect supply air duct to the flange on top of the air handler. If an isolation connector is used, it must be non- 2. If a change of the orifice is required, loosen the retainer nut flammable. and separate the retainer tube assembly. ■ A return air duct system is recommended. If the unit is 2 1 installed in a confined space or closet, a return connection 3 must be run, full size, to a location outside the closet. Filter Specifications

Minimum Filter Requirements Chart 4 1.0.75 in. Brass hex fitting 3. Piston with orifice Nominal Tons Square Inch Surface Area 2. Supplied gasket 4. 0.812 in. Brass hex nut Air Conditioning &Nominal Size Minimum & Return Air 3. Remove the orifice with an orifice extractor tool from the Nominal Airflow Disposable Cleanable Free Area replacement orifice package provided. Filters Filters 4. Insert the proper orifice into the fitting, seal end first. Make sure the orifice is free to move in the fitting. Up to 2 Tons 432 sq. in. 260 sq. in. 260 sq. in. 5. Replace the retainer nut. 800 - 900 CFM 20 in. x 25 in. 15 in. x 20 in. NOTE: Overtightening the retainer nut will crush the gasket and may result in a system leak or stuck piston. 2¹⁄₂ Tons 480 sq. in. 288 sq. in. 288 sq. in. 6. Dispose of all packaging and unused parts. 900-1000 CFM 20 in. x 30 in. 14 in. x 25 in. 3 Tons 576 sq. in. 346 sq. in. 346 sq. in Connect Refrigerant Lines 1300 - 1500 CFM *14 in. x 25 in. 16 in. x 25 in. IMPORTANT: Refrigerant lines must be connected by a licensed, EPA certified refrigerant technician in accordance with 3¹⁄₂ Tons 672 sq. in. 404 sq. in. 404 sq. in. established procedures. 1300 - 1500 CFM *16 in. x 25 in. 20 in. x 25 in. ■ To avoid damaging the rubber grommets in the cabinet while brazing, slide the rubber grommets over the refrigerant lines 4 Tons 768 sq. in. 461 sq. in. 461 sq. in. until they are away from the heat source. 1500 - 1700 CFM *20 in. x 25 in. 20 in. x 25 in. ■ Use a braze compound suitable for refrigeration lines, such as an alloy of silver or copper and phosphorus with a melting 5 Tons 960 sq. in. 576 sq. in. 576 sq. in. point of not more than 1100°F. Braze the copper refrigerant 1900 - 2100 CFM *20 in. x 30 in. 24 in. x 25 in. lines to the copper stubs at the coil and at the condensing unit and let cool. * 2 disposable filters required for these units NOTE: Do not use soft solder. ■ Reinstall the rubber grommets after brazing is finished.

7 Make Electrical Connections NOTE: The constant air terminal is to be connected to a low speed motor tap only. If a motor is wired for a higher speed, the 3 increased amp draw could cause the board control to fail and 1 void the warranty. 2

240 Volt Installations WARNING

1. Connect black to black 2. Connect yellow to yellow 3. Connect ground wire to ground terminal marked “GND”

6. Replace the air handler access panels. Electrical Shock Hazard Disconnect all power supplies before servicing. 208 Volt Conversion Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. WARNING

1. Disconnect all power supplies. 2. Remove the air handler access panels. 3. Route the field supply wires to the air handler electrical connection box. 4. Using UL listed wire nuts, connect the field supply wires to the furnace (black to black and yellow to yellow). Electrical Shock Hazard Disconnect all power supplies before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

1. Disconnect all power supplies. 2. Remove the control compartment access panel. 3. Move the 2 connected black transformer leads from the 240 Volt terminal on the transformer to the 208 Volt terminal on the transformer. See “Wiring Diagram - Blower”.

WARNING

Electrical Shock Hazard Electrically ground air handler. Connect ground wire to ground terminal marked “GND”. Failure to do so can result in death or electrical shock.

5. Connect ground wire to ground terminal marked “GND.”

8 Low Voltage Connections

9 Wiring Diagram - Electric Heat

DWG .NO. 065463300 WIRING DIAGRAM -ELECTRIC HEA T

SEQ3 3rdSTAGE CB3 L1C LS5 12 BK 5412 BK

L2C

31 HE5 BLK 18 GND. 18 BLU 12 YEL

SEQ2 2nd STAGE CB2 18 BLK LS3 L1B 12 BK 5 4 12 BK L2B 3 1 HE3 HE4

12 YEL LS4 18 BLU

GND. 12 YEL

SEQ1 1stSTAGE CB1

LS1 L1A 12 BK 5412 BK 12 BK L2A 3 1 12 BK HE2 HE1

12 YEL LS2

12 YEL

GND 14 GRN 14 BLK 14 YEL 14 RED 18 BLU 18 WHT

TO BLOWER

1 2 GROUND LUG 3 4 5 6 6-PIN PLUG

HEATERS USED TB = TERMINAL BLOCK (OPT.) POWER (FACTORY WIRED) POWER (FIELD WIRED) 5 KW = HE1 PD = PULL DISCONNECT (OPT.) CONTROL (FACTORY WIRED) CB = CIRCUIT BREAKER (OPT.) 7.5 & 10 KW = HE1 & HE2 CONTROL (FIELD WIRED) 12.5 & 15 KW = HE1,HE2 & HE3 SEQ = SEQUENCER 17.5 & 20 KW = HE1,HE2,HE3 & HE4 GND = GROUND LUG 22.5 & 25 KW = HE1,HE2,HE3,HE4 & HE5 LS = LIMIT SWITCH PLUG PIN HE = HEATER ELEMENT LOCATION 1 2 3

4 5 6 CONTROL CIRCUIT WIRING TO BE 24 VOLT, N.E.C. CLASS 2 AMP 350781-1 6-PIN CAP

10 Wiring Diagram - Blower

WIRING DIAGRAM: BLOWER DIAGRAM OPTIONAL TIME DELAY 1 25463 TD = TIME DELAY (OPT.) ** GND TR = TRANSFORMER 4

BR = BLOWER RELAY TRANS. MTR = BLOWER MOTOR TD 18 BLU

FROM 18 GRN CAP = MOTOR CAPACITOR HH 14 RED 18 BLU 18 WHT 18 BLK 14 BLK L1 14 YEL L2 GND = GROUND CONNECTION

18 BLK DS = DOOR SWITCH (OPTIONAL) 18 RED DS TRANS 18 BLU 18 GRN W2 BLK 18 BLU R FROM 1 COM 18 RED 18 WHT W1 WHT 3 AT

24V 18 BLU 208V C 6 5 BLU

240V TO C 120V TR 18 GRN G GRN 4 2 OR BY OTHERS THERMOST 220V 18 RED R RED 18 BLU 18 BLU WIRING DIAGRAM: NO HEAT ** 1 14 BLK 3 GND WIRE NUTS BY OTHERS 6 5 L1 14 BLU(MED) BLU 4 BRN/WHT 4 2 14 RED(LO) RED 3 MTR Y BR 14 BLK(HI) BLK BRN L2 OR 2 NEUT. 14 YEL(COM) YEL 15 AMP CAP SUPPL 1 VOLTAGE WHT(120V) WHT (IF 120V) YEL(240V) 14 14 BLK 14 14 GRN

1 2

6-PIN TO BLOWER PLUG GROUND LUG

WIRING DIAGRAM: HOT WATER WITH BLOWER DELAY SEQUENCER, W/REMOTE PUMP

WIRE NUTS SEQ 120/240 BY OTHERS VOLT 3 1

L1 14 BLK 14 BLK AQUASTAT 5 4 SUPPLIED L2 OR 14 YEL (240 V) SPLICE BY OTHERS IF REQUIRED

NEUT. 14 WHT (120 V) 15 AMP SUPPLY VOLTAGE TO REMOTE PUMP OR BY OTHERS PUMP RELAY BY OTHERS 10 AMPS AT 120 VOLTS OR 240 VOLTS AC. USE 14 AWG MIN. WIRE GND. PER NEC AND LOCAL CODES. 14 RED 14 BLK 14 YEL 14 GRN 18 BLU 18 WHT

GND = GROUND TO BLOWER 6-PIN PLUG SEQ = SEQUENCER GROUND LUG 1 2 3 4 5

11 Complete Installation Check Airflow NOTE: Refer to outdoor unit installation instructions for system Cooling blower speed start-up instructions and refrigerant charging instructions. ■ For proper cooling operation, the airflow through the indoor coil should be between 350 – 450 CFM per ton of cooling Pre-Start Check capacity (or 350 -450 CFM per 12,000 BTU/HR) based on the rating of the outdoor unit. ■ Is unit properly located, level, secure, and serviceable? ■ The cooling blower speed is factory configured to provide ■ Has an auxiliary pan been provided under the unit with correct airflow for an outdoor unit that matches the maximum separate drain for units installed above a finished ceiling or in cooling capacity rating of the air handler. any installation where condensate overflow could cause ■ If the outdoor unit is smaller than the maximum cooling damage? capacity rating for the air handler, the cooling blower speed ■ Have all webs been carefully removed from the drain may need to be changed. Refer to “Blower Performance connections that are being used? Have all drain pan plugs Chart.” not used been properly plugged? IMPORTANT: The cooling blower speed must be set to provide a ■ Has the condensate line been properly sized, run, trapped, minimum of 350 CFM airflow per ton (12,000 BTU/HR) of outdoor pitched, and tested? cooling capacity. ■ Is the duct work correctly sized, run, taped, and insulated? Heating blower speed (If Electric Heat or Hydronic Heat is installed) ■ Have all cabinet openings and wiring been sealed? ■ The heating blower speed is factory configured for the same ■ Is the indoor coil orifice size correct? setting as the cooling blower speed. ■ Have all unused orifice replacement parts and packaging ■ It may be necessary to change the heating blower speed to been disposed of? obtain optimum comfort and performance. ■ Is the filter clean, in place, and of adequate size? ■ Is the wiring neat, correct, and in accordance with the wiring WARNING diagram? ■ Is the unit properly grounded and protected (fused)? ■ Is the thermostat correctly wired and in a good location? ■ Are all access panels in place and secure?

Check Blower Operation Electrical Shock Hazard Disconnect all power supplies before servicing. 1. Set thermostat to FAN ON. Replace all parts and panels before operating. 2. The indoor blower should come on. Failure to do so can result in death or electrical shock. Check Electric Heater (if used) To change cooling blower speed: (Refer to “Wiring 1. Set thermostat to call for auxiliary heat (approximately 5°F Diagram - Blower”) above ambient temperature).The indoor blower and auxiliary heat should come on together. Allow a minimum of 3 minutes 1. Disconnect all power supplies. for all sequencers to cycle on. 2. Remove the control compartment access panel. 2. Set the thermostat so it does not call for heat. Allow up to 5 3. Remove the factory installed motor lead (Blue or Red) from minutes for all sequencers to cycle off. pin #2 on the blower relay. 4. Remove the insulator from the desired motor speed tap. Check Hydronic Coil Heat (if used) 5. Install the new motor speed tap onto pin #2 of the motor relay. 1. Set thermostat to call for heat (approximately 5°F above 6. Install the insulator you removed unto the unused motor ambient temperature). The hydronic heat pump or valve will speed tap. come on followed by the indoor blower. 7. Replace all panels. 2. Set the thermostat so it does not call for heat. Allow up to 5 minutes for the pump or valve and the blower to cycle off. To change heating blower speed: (Refer to “Wiring Diagram – Blower”) 1. Disconnect all power supplies. 2. Remove the control compartment access panel. 3. Remove and discard the black jumper wire between pin #2 and pin #5 of the blower relay. 4. Remove and discard the insulator from the desired motor speed tap. 5. Install the new motor speed tap onto pin #5 of the motor relay. 6. Replace all panels.

12 Blower Performance Chart

External Static Pressure in W.C. Air Handler Blower Speed With Electric Heat With Hydronic Coil Model .10 .20 .30 .40 .50 .10 .20 .30 .40 .50

Low (Red) 664 641 623 605 574 638 602 564 551 538

24 Medium (Blue)* 906 855 802 783 764 816 769 721 705 688

High (Black) 940 927 914 884 854 846 834 823 796 769

Low (Red) 1226 1156 1086 1061 1036 1092 1030 928 907 886

36 Medium (Blue)* 1465 1382 1245 1217 1188 1319 1244 1121 1096 1070

High (Black) 1467 1447 1427 1381 1334 1320 1302 1284 1243 1201

Low (Red) 1410 1329 1248 1219 1189 1287 1214 1137 1112 1086

42 Medium (Blue)* 1726 1628 1526 1491 1456 1554 1466 1374 1343 1312

High (Black) 1733 1709 1685 1630 1574 1560 1538 1517 1467 1417

Low (Red)* 1745 1645 1545 1509 1473 1570 1481 1381 1358 1326

48 Medium (Blue) 2107 2078 2048 1981 1913 1896 1870 1844 1783 1722

High (Black) 2163 2133 2103 2034 1964 1947 1920 1893 1831 1768

Low (Red) 1745 1645 1545 1509 1473 1570 1481 1381 1358 1326

60 Medium (Blue)* 2107 2078 2048 1981 1913 1896 1870 1844 1783 1722

High (Black) 2163 2133 2103 2034 1964 1947 1920 1893 1831 1768

* Factory setting for both heating and cooling. All data given while air handler is operating with a wet DX coil and air filter installed. When no heat accessory is installed, use the airflow from Electric Heat section.

13 SEQUENCE OF OPERATION AIR HANDLER Cooling (cooling only or heat pump) MAINTENANCE When the thermostat calls for cooling, the circuit between R and G is completed, and the blower relay is energized. The Normally IMPORTANT: Do not operate system without a filter. A filter is Open contacts close, causing the indoor blower motor to required to protect the coil, blower, and internal parts from operate. The circuit between R and Y is also completed; this excessive dirt and dust. See “Installation Configurations” for the circuit closes the contactor in the outdoor unit starting the location of the filter in the unit cabinet and the service panel compressor and outdoor fan motor. Circuit R and O energizes the giving access to unit filter. The filter is placed in the supply air reversing valve, switching it to the cooling position. (The return duct by the installer. reversing valve remains energized as long as selector switch is in ■ Inspect air filters at least once a month and replace or clean the COOL position.) as required. Dirty filters are the most common cause of Heating (electric heat only) inadequate heating or cooling performance. When the thermostat calls for heat, the circuit between R and W ■ Replace disposable filters. Cleanable filters can be cleaned is completed, and the heater sequencer is energized. A time by soaking in mild detergent and rinsing with cold water. delay follows before the heating elements and the indoor blower motor come on. Units with a second heat sequencer can be ■ Install new/clean filters with the arrows on the side pointing in connected with the first sequencer to W on the thermostat sub- the direction of airflow. base or connected to a second stage on the sub-base. ■ Never replace a cleanable (high velocity) filter with a Heating (heat pump) disposable (low velocity) filter unless return air system is When the thermostat calls for heat, the circuits between R and Y properly sized for it. and R and G are completed. Circuit R-Y energizes the contactor ■ If water should start coming from the auxiliary drain line, a starting the outdoor fan motor and the compressor. Circuit R and problem exists which should be investigated and corrected. G energizes the blower relay starting the indoor blower motor. Contact a qualified person. If the room temperature should continue to fall, the circuit between R and W 1 is completed by the second stage heat room thermostat. Circuit R-W 1 energizes a heat sequencer. The completed circuit will energize supplemental electric heat (if ASSISTANCE OR SERVICE applicable). Units with a second heater sequencer can be connected with the first sequencer to W 1 on the thermostat or If you need further assistance, you can write to the below connected to a second heating stage W 2 on the thermostat sub- address with any questions or concerns: base. Whirlpool® Home Cooling and Heating Emergency Heat (heating heat pump) 7901 S.W. 6th Court If selector switch on thermostat is set to the emergency heat Plantation, Florida 33324 position, the heat pump will be locked out of the heating circuit, Please include a daytime phone number in your correspondence. and all heating will be electric heat (if applicable). A jumper should be placed between W 2 and E on the thermostat sub- base so that the electric heat control will transfer to the first stage Accessories heat on the thermostat. This will allow the indoor blower to cycle To order accessories ask for the appropriate part number listed on and off with the electric heat when the fan switch is in the below or contact your Whirlpool® Home Cooling and Heating AUTO position. dealer. Heating (hydronic heat) ADKT2-3 Downflow Adapter Model WM024 When the thermostat calls for heat, the circuit between R and W is completed, and the heater sequencer is energized. The ADKT3-3 Downflow Adapter Model WM036 external circulating pump or control valve to supply hot water to ADKTM-2 Downflow Adapter Model WM042 the hydronic coil comes on, then a second set of contacts close ADKTL-2 Downflow Adapter Model WM048, WM060 which are used to bring on the indoor blower. Electric Heat Kits and Hydronic Heater Coil Accessories Refer to the Accessory Kit Label on the front panel of the air handler for electric heat kit and hydronic heater coil accessory options and applications.

14 15 Keep this book and your sales slip together for future Dealer name______reference. You must provide proof of purchase or installation date for in-warranty service. Address ______Write down the following information about your furnace to better help you obtain assistance or service if you ever need it. You will Phone number______need to know the complete model and serial number. You can find this information on the front panel. Model number ______Serial number ______

Installation date ______