Whirlpool WMB, Installation Instructions Manual

3

Installation Configurations

For ease in installation, it is best to make any necessary coil 
configuration changes before setting the air handler in place. See 
“Installation Configuration Options” later in this section.

Vertical Installations

Upflow/Counterflow

The air handler must be supported on the bottom only and set on 
a field-supplied supporting frame with an air return opening. 
Securely attach the air handler to the supporting frame.

Horizontal Installations

Horizontal installations can be left-hand or right-hand air supply. 
The cabinet must be supported by the building structure to 
ensure cabinet integrity. Ensure that there is adequate room to 
remove the blower access panel if installing in the horizontal 
position. 

Suspended Cabinet Installation

NOTE: Air handlers cannot be installed in such a way that the 
blower access panel is facing up or down.

■

The suspending means must be field fabricated, and should 
consist of two “cradles” made by attaching two rods to a 
length of angle iron or equivalent structural steel.

■

Locate the cradles so that they are as close as possible to the 
ends of the air handler (this will provide access for removal 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.

Electrical Requirements

NOTES: 

■

Use copper conductors only.

■

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 over-current 
protection are to be supplied by the installer. Refer to the air 
handler rating plate for maximum overcurrent protection, 
minimum circuit ampacity, as well as operating voltage.

■

The power supply must be sized and protected according to 
the specifications supplied on the product.

■

This air handler is factory-configured for 240 Volt, single 
phase, 60 cycles. For 208 Volt applications, see “208 Volt 
Conversion” in the “Make Electrical Connections” section.

■

For optional electric heater applications, see “Accessories.” 
Refer to the instructions provided with the accessory for 
proper installation.

Left to Right

Airflow

Right to Left

Airflow

Upflow

Counterflow

Horizontal

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.