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AIR HANDLER INSTALLATION INSTRUCTIONS

AIR HANDLER SAFETY

INSTALLATION REQUIREMENTS

These instructions are intended as a general guide only 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.

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.

Table of Contents

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

INSTALLATION REQUIREMENTS ................................................1

Tools and Parts ............................................................................2
Location Requirements ................................................................2
Installation Configurations ...........................................................3
Electrical Requirements ...............................................................3
Ductwork Requirements ..............................................................4

INSTALLATION INSTRUCTIONS ..................................................4

Inspect Shipment .........................................................................4

Install Ductwork............................................................................4
Install Filter....................................................................................4
Make Electrical Connections .......................................................5
Complete Installation....................................................................7

SEQUENCE OF OPERATION ......................................................10

AIR HANDLER MAINTENANCE ..................................................10

ASSISTANCE OR SERVICE .........................................................10

Accessories ................................................................................10

WARRANTY ..................................................................................11

Whirlpool

©

 Model WMB

0650329-60

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

You

 

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

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 Contents for WMB

Page 1: ...ANDLER SAFETY 1 INSTALLATION REQUIREMENTS 1 Tools and Parts 2 Location Requirements 2 Installation Configurations 3 Electrical Requirements 3 Ductwork Requirements 4 INSTALLATION INSTRUCTIONS 4 Inspect Shipment 4 Install Ductwork 4 Install Filter 4 Make Electrical Connections 5 Complete Installation 7 SEQUENCE OF OPERATION 10 AIR HANDLER MAINTENANCE 10 ASSISTANCE OR SERVICE 10 Accessories 10 WARRA...

Page 2: ... very humid space If installed in an unconditioned space sealant should be applied around the electrical wires refrigerant tubing and condensate lines where they enter the cabinet Electrical wires should be sealed on the inside where they exit the conduit opening Sealant is required to prevent air leakage into and condensate from forming inside the air handler control box and on electrical control...

Page 3: ...of major components such as the blower assembly Provide enough clearance between the suspension rods and the air handler to allow removal of the blower access panel Installation Configuration Options NOTE Typical installations with optional WEM modular evaporator coil are shown ElectricalRequirements NOTES Use copper conductors only All field wiring must be done in accordance with National Electri...

Page 4: ...o not install the unit as your claim may be denied InstallDuctwork IMPORTANT Install ductwork in accordance with NFPA 90B Standard for the Installation of Warm Air eating and Air Conditioning Sytems latest edition and any local codes Connect supply air duct to the flange on top of the unit If an isolation connector is used it must be non flammable A return air duct system is recommended If the uni...

Page 5: ... transformer to the 208 Volt terminal on the transformer See the appropriate wiring diagram for your model WARNING 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 WARNING Electrical Shock Hazard Electrically ground air handler Connect ground wire to ground terminal marked G...

Page 6: ...t N E C Class 2 Plug Pin Location Amp 350781 1 6 Pin Cap TD Time Delay Optional TR Transformer BWR Blower Relay MTR Blower Motor CAP Motor Capacitor GND Ground Connection BK Black W White R Red G Green BU Blue Y Yellow BWR 3 6 4 1 5 2 18 BK 12 BK 12 BK 12 BK 12 BK 12 BK 12 BK 12 BK 12 BK 12 Y 12 Y LS3 LS4 12 Y 12 Y SEQ2 2nd Stage 1st Stage LS1 LS2 SEQ1 CB2 L1B L2B L2A L1A GND CB1 GND 14 BK 14 Y 14...

Page 7: ...an outdoor condensing unit or heat pump that matches the maximum cooling capacity rating of the air handler If the outdoor condensing unit is smaller than the maximum cooling capacity rating for the air handler the cooling blower speed may need to be changed Refer to Blower Performance Chart PSC Motor IMPORTANT The cooling blower speed must be set to provide a minimum of 350 CFM airflow per ton 12...

Page 8: ...nce Chart Variable Speed Motor NOTE If using a humidistat the dehumidify resistor located on the bottom right of the control board must be removed to enable it See Control Board Taps and Dehumidify Resistor The HUM terminal on the board must be connected to the Normally Closed contact of the humidistat so that the board senses an open circuit on high humidity If a humidistat is used the dehumidify...

Page 9: ...556 551 562 545 523 517 C 514 502 490 484 465 458 437 426 D 466 445 437 412 403 392 386 382 WMB48VB 1A Y1 A 1 134 1 123 1 123 1 113 1 102 1 091 1 079 1 074 B 991 972 956 949 937 923 909 909 C 847 826 807 793 778 753 736 712 D 687 664 646 619 612 581 557 531 Y1 Y2 A 1 676 1 656 1 635 1 624 1 613 1 608 1 608 1 598 B 1 435 1 404 1 398 1 398 1 392 1 380 1 375 1 362 C 1 234 1 220 1 212 1 205 1 197 1 18...

Page 10: ...occurs at 50 of the normal airflow rate 350 CFM minimum Reduced Airflow Operation For situations where humidity control is a problem the variable speed motor can be enabled to operate at a 10 reduction in the normal airflow rate under the control of a humidistat This can be achieved by connecting to a standard humidity control that is normally closed and opens on humidity rise The Control Board Th...

Page 11: ...11 ...

Page 12: ...late Dealer name____________________________________________________ Address ________________________________________________________ Phone number__________________________________________________ Model number __________________________________________________ Serial number __________________________________________________ Installation date ________________________________________________ 0650329...

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