20 TON
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Custom HVAC & Filtration 726 Seneca Place Madison, WI 53711 608-334-5999 [email protected] Jan 2016
Maintenance Guidelines
The motor and blower bearings are permanently lubricated and should not require
maintenance. The evaporator fans are belt driven. The drive belts should be rou-
tinely examined for wear and correct tension. An incorrectly tensioned belt can
cause bearing or wear damage.
The belts can be tensioned by loosening the 4 bolts holding the motor to the
motor mount. Once the motor mount bolts are loose, adjust the belts by tightening
or loosening the two 3/4 in. adjusting bolts on the bottom of the motor mount
bracket. Retighten the 4 bolts holding the motor to the motor mount.
A properly tensioned belt has approximately 1 in. to 1 1/2 in. movement when both
legs of the belt are pressed in midway between the pulley and the sheave.
Each unit is provided with replaceable filters that are installed in the evaporator
return air section. The return air grill must be removed to gain access to the
filters. Check filters periodically to verify that the filters are clean. Dirty filters will
severely reduce the performance of the machine.
Motor Mount Bolt
3/4 in. adjusting bolt
Filters are behind the return air grille
Hazardous Voltage!
Disconnect all electrical power before servicing. Follow proper procedures to
ensure that the power cannot be inadvertently turned on. Failure to disconnect
power before servicing can result in serious injury or death.
