Page 67 of 84
Table 11: Maintenance Guidelines
17.1 General
Quarterly
Follow the entire start-up procedure at this time and check settings (controls, operating
temperatures, operating pressures, power and control voltages) and operation.
17.2 Unit Exterior
Cabinet Exterior
After installation, touch up scratches. Periodic painting should be done thereafter
as required. The caulk should be inspected annually. Re-apply caulk as needed to
maintain integrity.
Unit Location
Verify that no flammable objects, liquids or vapors are present near the unit. If unit
includes gas furnace, clearances to combustibles around the vent must be adhered to.
Do not hang anything from or place anything on the unit.
Keep the area around the unit free of all objects.
17.3 Direct-Drive Supply and Exhaust Fans
Motors
Inspection:
1. Inspect motor every 3 months. Keep the motor clean and vent openings clear.
17.4 Condensing Fans
Assemblies
Manually rotate to ensure free movement. Check that all fan mounting hardware
is tight. Check motor bearings for wear.
17.5 Refrigeration Circuit Components
Evaporator Coil
Check for dirt and bent fins. Clean with water from blower side towards filter side.
Condenser Coil
Check for dirt and bent fins. Clean by brushing off with broom.
Compressors
Compressors are factory-supplied with a charge of oil (POE for Copeland, and PVE
for Bitzer) and should not require additional maintenance.
17.6 Condensate Drain Pan and Drain
Assembly
Check for blockages. Clean as necessary with mixture of Algae Guard if signs of mold
or algae are present.
17.7 Dampers
Dampers
Check and clean blades.
Damper Motor/Linkages
Verify that all damper linkages move freely. Lubricate if necessary.
17.8 Electric Heater Wiring and Wiring Connections
Assembly
Check all wiring connections. Tighten as necessary.
Check internal wiring. Replace as necessary with type THHN 221°F (105°C), 600V, 16
gauge wire or equivalent.
Control Panel
Check heater control panel for dust/dirt and moisture. Clean as necessary.
Heating Elements
Check heating elements for dust/dirt build-up and/or broken elements. Replace
elements and /or clean elements with low pressure air as necessary.
Check element male/female chassis insulators for breaks and/or cracks. Replace
as necessary.
Check element support frame insulators. Replace missing or broken insulators
as necessary.
17.9 Filters
Assemblies
Filters should be checked for dirt restriction on a monthly basis (or as required).
Replace filters with filters of equal specification when they appear dirty.
PR Series Installation, Operation, and Maintenance Manual
