ROUTINE SYSTEM MAINTENANCE
These items should be part of a routine maintenance program, to be checked every month or two, until a specific
schedule for each can be identified for this installation:
Quarterly Inspection (and 30 days after initial start) — Indoor section
• Condenser coil cleanliness checked.
• Return air filter replacement
• Outdoor hood inlet filters cleaned
• Belt condition and tension checked
• Pulley alignment checked
• Fan shaft bearing locking collar tightness checked
• Condensate drain checked
Seasonal Maintenance — These items should be checked at the beginning of each season (or more often if local
conditions and usage patterns dictate):
Air Conditioning
• Condenser fan motor mounting bolts tightness
• Compressor mounting bolts
• Condenser fan blade positioning
• Control box cleanliness and wiring condition
• Wire terminal tightness
• Refrigerant charge level
• Evaporator coil cleaning
• Evaporator blower motor amperage
Heating
• Power wire connections
• Fuses ready
• Manual-reset limit switch is closed
Economizer or Outside Air Damper
• Inlet filters condition
• Check damper travel (economizer)
• Check gear and dampers for debris and dirt
SERVICE
Servicing Systems on Roofs With Synthetic Materials — POE (polyolester) compressor lubricants are known to
cause long term damage to some synthetic roofing materials. Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year or more. When performing any service which may risk
exposure of compressor oil to the roof, take appropriate precautions to protect roofing. Procedures which risk oil
leakage include but are not limited to compressor replacement, repairing refrigerants leaks, replacing refrigerant
components such as filter drier, pressure switch, metering device, coil, accumulator, or reversing valve.
Synthetic Roof Precautionary Procedure:
1. Cover extended roof working area with an impermeable polyethylene (plastic) drop cloth or tarp. Cover an
approximate 10 x 10 ft (3.3 x 3.3 m) area.
2. Cover area in front of the unit service panel with a terry cloth shop towel to absorb lubricant spills and prevent run-
offs, and protect drop cloth from tears caused by tools or components.
3. Place terry cloth shop towel inside unit immediately under component(s) to be serviced and prevent lubricant
run-offs through the louvered openings in the base pan.
4. Perform required service.
5. Remove and dispose of any oil contaminated material per local codes.
Liquid Line Filter Drier — The factory-provided filter drier is specifically designed to operate with Puron®. Replace
the filter drier with factory-authorized components only with a filter drier with desiccant made from 100% molecular
sieve grade XH-11. Filter drier must be replaced whenever the refrigerant system is opened.
When removing a filter drier, use a tubing cutter to cut the drier from the system. Do not unsweat a filter drier from
the system. Heat from unsweating will release moisture and contaminants from drier into system.
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