Instruction manual

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AIR HANDLER INSTALLATION INSTRUCTIONS

AIR HANDLER SAFETY

Table of Contents

AIR HANDLER SAFETY .................................................................1

INSTALLATION REQUIREMENTS................................................2

Tools and Parts ............................................................................2

System Requirements..................................................................2

Location Requirements................................................................2

Installation Configurations ...........................................................3

Drain Pan Connections ................................................................4

Electrical Requirements—

Models Without Factory-Installed Electric Heat..........................5

Electrical Requirements—

Models With Factory-Installed Electric Heat ...............................6

Ductwork Requirements ..............................................................6

INSTALLATION INSTRUCTIONS..................................................6

Inspect Shipment .........................................................................6

Install Condensate Drain..............................................................7

Install Ductwork............................................................................8

Verify Orifice Size .........................................................................8

Connect Refrigerant Lines ...........................................................8

Make Electrical Connections—

Models Without Factory-Installed Electric Heat ..........................9

Make Electrical Connections—

Models with Factory-Installed Electric Heat..............................10

Complete Installation..................................................................14

SEQUENCE OF OPERATION ......................................................21

Cooling (Cooling Only or Heat Pump)........................................21

Heating (Electric Heat Only) .......................................................21

Heating (Heat Pump)..................................................................21

Variable Speed Features............................................................21

AIR HANDLER MAINTENANCE ..................................................22

ASSISTANCE OR SERVICE.........................................................22

Accessories ................................................................................22

WARRANTY ..................................................................................23

Whirlpool

Models WAHMS, WAHMV

065937402

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

You

can be killed or seriously injured if you don't

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.

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:

follow instructions.

instructions.

DANGER

WARNING

Summary of content (24 pages)

PAGE 1
AIR HANDLER INSTALLATION INSTRUCTIONS Table of Contents AIR HANDLER SAFETY .................................................................1 INSTALLATION REQUIREMENTS ................................................2 Tools and Parts ............................................................................2 System Requirements..................................................................2 Location Requirements ................................................................
PAGE 2
INSTALLATION REQUIREMENTS These instructions are intended as a general guide only for use by qualified persons and do not supersede any national or local codes in any way. Compliance with all local, state, or national codes pertaining to 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. All models are designed for indoor installation only.
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18" and 24" models 320 sq. in. Non-Ducted Return Closet Installation 30" and 36" models 360 sq. in. The air handler can be installed in a closet with a false bottom to form a return air plenum or be installed with a return air plenum under the air handler. Louvers or return air grilles are field supplied. Local codes may limit application of systems without a ducted return to singlestory buildings.
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. Horizontal Right Horizontal Left Left to Right Airflow: Requires drain pan location change. Factory ready (on some models) Drains Drains A C B A A. Drain connections B. Coil access cover C. Blower access cover A. Drain connections Drain Pan Connections Horizontal Installations can be either “Right” or “Left.” For Horizontal Right Installations, a drain pan location change is required. Use drain connections marked “A” below.
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3. Remove screws from the coil support bracket and lift off of the air handler. Set aside. 7. Install the coil support bracket on the opposite side of the air handler. NOTE: For models 2.5 tons to 5 tons, the bracket attached to the top cap will need to be switched to the opposite side of the coil. This is to prevent blowoff in the horizontal position when the airflow is changed from left-hand to right-hand. After Conversion A B C A D E G A. Coil support bracket screws 4.
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Electrical Requirements—Models With Factory-Installed Electric Heat NOTES: ■ Use copper conductors only. WARNING Electrical Shock Hazard ■ All field wiring must be done in accordance with National Electrical Code, applicable requirements of UL and local codes where applicable. ■ Electrical wiring, disconnect means and overcurrent protection are to be supplied by the installer.
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NOTE: If any damages are discovered and reported to the carrier, do not install the air handler because your claim may be denied. 3. Connect primary drain line connection to the primary drain pan connection. The primary drain connection is flush with the bottom of the inside of the pan. Secondary connection is raised above the bottom of the inside of the pan. NOTE: When making drain fitting connections to the drain pan, hand tighten. Using a sealant is recommended.
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Install Ductwork IMPORTANT: ■ Install ductwork in accordance with NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition) and any local codes. ■ Connect supply air duct to the flange on top of the air handler. If an isolation connector is used, it must be nonflammable. ■ A return air duct system is recommended. If the air handler is installed in a confined space or closet, the entire duct cross sectional area must meet minimum return air free area.
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Make Electrical Connections—Models Without Factory-Installed Electric Heat 240-Volt Installations A B WARNING C GND 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 blower access panel. 3. Route the field supply wires to the air handler electrical connection box. 4.
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Make Electrical Connections—Models with Factory-Installed Electric Heat WARNING Connect to Circuit Breaker 60 OFF GND 60 Electrical Shock Hazard 208/230 Volt Field Supply Wires OFF Field Supply Ground Wires ON NOTE: There are 2 ground terminals marked “GND” shown here. There may be 1, 2 or 3 ground terminals depending on the number of circuit breakers. L1 Disconnect all power supplies before servicing. Circuit 1 ON L2 Replace all parts and panels before operating.
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Low Voltage Connections Thermostat Air Handler Thermostat Air Handler Heat Pump Unit R R G G BU BU W BK Condensing Unit Cooling Only Application Thermostat Air Handler R G Connect common wire only if required. See thermostat installation instructions.
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Wiring Diagram—Blower (PSC Motor) 4 5 6 14 Y L2 18 BK 208V 240V BK W1 W C BU G G R R 18 R 24V COM W2 18 BU (H) 3 5 (H) TR C 2 TD ** 1 6 5 4 5 6 Wiring Diagram - No Heat ++ 14 BU (MED) 14 R (LO) BWR 14 BK (HI) 14 Y (COM) GND BR / W BU R BK MTR BR CAP Y+ 4 3 2 1 2 ++ 3 Wire Nuts by Others 3 4 2 ** TD = Time Delay (Optional) TR = Transformer BWR = Blower Relay MTR = Blower Motor CAP = Motor Capacitor GND = Ground Connection 18 G 14 R 18 BU 1 1 1 6-Pin Plug Mod
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Wiring Diagram—Blower (Variable Speed Motor) 6-Pin Plug 3 4 Power (Factory Wired) Control (Factory Wired Transformer Blower Motor Ground Connection Blower Relay 18 W 18 BK 5 6 18 BU L2 14 Y 14 R L1 2 14 BK 1 TR MTR GND BWR Control Board TR R 24V R 18 BU C1 18 BU EM 18 BK C1 18 W W1 O 18 OR Y2 18 BU/W Y1 18 Y G 18 G 16-Pin Plug & Cap 18 W 240 BWR 18 G GND W2 O Y2 Y1 G W1 18 BR (16) 18 BK 240V R Thermostat 208V 24V BU 24V R 18 Y COM Hum 18 R 18 R 5-Pin Plug 18 BK 5 18 Y
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Complete Installation NOTE: Refer to outdoor unit installation instructions for system start-up instructions and refrigerant charging instructions.
PAGE 15
Blower Performance Chart Air Handler Blower Model Speed 18 24 CFM @ ESP. - in. W.C. 0.1 0.2 0.3 0.4 0.
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Control Board Taps and Dehumidify Resistor 4. If desired, adjust ADJUST tap from NORM: (+) will increase airflow by 10% or (-) will decrease airflow by 12% 5. Reconnect all power supplies. . ADJUST NORM (+) (–) TEST HEAT COOL A B C D A B C D D1 A DEHUMIDIFY B CUT TO ENABLE A. Dehumidify LED B.
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Application Table—Variable Speed Motor Model Mode Control Board Taps Energized Thermostat Terminal Cool HUM EM A B C D A B C D CFM CFM CFM CFM CFM CFM CFM CFM 700 600 500 400 X 1,400 1,200 1,000 800 X 1,400 1,200 1,000 800 X *** *** *** *** 1,400 1,400 1,000 1,000 *** *** *** *** 1,400 1,400 1,000 1,000 800 700 600 500 X 1,600 1,400 1,200 1,000 X 1,600 1,400 1,200 1,000 X *** *** *** *** 1,600 1,600 1,200 1,200 *** *** *** ***
PAGE 18
Blower Performance Chart—Variable Speed Motor The versatility of the variable speed motor enables the air handler to tailor its performance to the different modes of operation encountered in heating and cooling. All variable speed air handlers are capable of operation at more than one nominal airflow rate. The operation of a variable speed air handler blower at different airflow rates is determined by the control board taps and the thermostat. See the Blower Performance Chart—Variable Speed Motor.
PAGE 19
Blower Performance Chart—Variable Speed Motor CFM @ E.S.P. - inches W.C. Air Handler Model Energized Thermostat Terminal Control Board Tap 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
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Blower Performance Chart—Variable Speed Motor CFM @ E.S.P. - inches W.C. Air Handler Model Energized Thermostat Terminal Control Board Tap 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
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SEQUENCE OF OPERATION Cooling (Cooling Only or Heat Pump) When the thermostat calls for cooling, the circuit between R and G is completed, and the blower relay is energized. The Normally Open contacts close, causing the indoor blower motor to operate. The circuit between R and Y is also completed; this circuit closes the contactor in the outdoor unit starting the compressor and outdoor fan motor. Circuit R and O energizes the reversing valve, switching it to the cooling position.
PAGE 22
AIR HANDLER MAINTENANCE IMPORTANT: Do not operate system without a filter. A filter is required to protect the coil, blower, and internal parts from excessive dirt and dust. See “Installation Configurations” for the location of the filter in the unit cabinet and the service panel giving access to unit filter. The filter is placed in the supply air return duct by the installer. ■ Inspect air filters at least once a month and replace or clean as required.
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PAGE 24
Keep this book and your sales slip together for future reference. You must provide proof of purchase or installation date for in-warranty service. Write down the following information about your air handler to better help you obtain assistance or service if you ever need it. You will need to know the complete model and serial number. You can find this information on the air handler rating plate.