507390-01
Page 5 of 5
Issue 1733
Maintenance
Cooling Chassis
The refrigeration system contained in the cooling chassis
normally requires no maintenance since it is a closed self-
contained system. Periodic maintenance is limited to:
Cooling Chassis is charged with R410A refrigerant.
•
Cleaning the evaporator air filter. Follow the directions
noted on the filter and label attached to the access
panel.
• Cleaning the condenser coil if covered with foreign
material such as lint, leaves, or other obstructions.
• Motors are permanently lubricated and do not normally
require re-oiling.
If servicing or major repairs are required, the complete
cooling chassis can be removed from the unit. Proceed as
follows:
1. Shut off the main power supply.
2.
Remove the filter access panel and the panel covering
the cooling controls.
3. Remove the drain hose from the drain pan.
4. Disconnect the plug-in electrical connectors. Do
not separate the connector by pulling on the wires;
instead, grasp the connector handle.
5. Disconnect the two power leads from the contactor.
(Leads come from the Grommet in the unit partition.)
6. Remove the screws from the panel directly in front of
the blower and remove the panel. Also remove the
additional screws located near the top edge of the
control panel.
7. Slide out the chassis being careful not to damage any
seals or parts.
To re-install the chassis, reverse the procedure outlined
above. Be sure that the chassis is inserted as far back as
it will go before replacing the screws. Side flanges on the
chassis must be engaged with the sealing strips on the
unit sides to prevent water and air leakage. Reconnect the
plug-in connector, reconnect the power and four leads,
and replace both access panels before turning on the main
electric power supply.
Heating Section
No maintenance is necessary on the electric heating
elements.
