37
ROUTINE SYSTEM MAINTENANCE
These items should be part of a routine maintenance
program, to be checked every monthor two, until a specific
schedule for each can be identifiedfor this installation:
Quarterly Inspection (and 30 days after initial start) —
Indoor section
SCondenser coil cleanliness checked.
SReturnair filter replacement
SOutdoorhood inlet filters cleaned
SBelt tensionchecked
SBelt conditionchecked
SPulleyalignment checked
SFan shaft bearing locking collar tightness checked
SCondensate 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
SCondenser fan motor mounting bolts tightness
SCompressormounting bolts
SCondenserfan blade positioning
SControlbox cleanliness and wiring condition
SWireterminal tightness
SRefrigerant charge level
SEvaporatorcoil cleaning
SEvaporator blower motor amperage
Heating
SPower wire connections
SFusesready
SManual-resetlimit switch is closed
Economizeror Outside Air Damper
SInlet filters condition
SCheckdamper travel (economizer)
SCheckgear and dampers for debris and dirt
SERVICE

Refrigeration System

EQUIPMENT DAMAGE HAZARD
Failure to followthis caution may result in damage to
equipment.
This system uses PuronRrefrigerant which has higher
pressures than R-22 and other refrigerants. No other
refrigerant may be used in this system. Gage set,
hoses, and recovery system must be designed to
handle Puron. If you are unsure consult the equipment
manufacturer.
CAUTION
!
Compressor Oil —
EQUIPMENT DAMAGE HAZARD
Failure to followthis caution may result in damage to
equipment.
The compressor in a Puron system uses a polyolester
(POE) oil. This oil is extremely hygroscopic, meaning
it absorbs waterreadily. POE oils can absorb 15 times
as much water as other oils designed for HCFC and
CFC refrigerants. Take all necessary precautions to
avoid exposure of the oil to the atmosphere.
CAUTION
!
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 Proce dure:
1. Cover extended roof working area with an imper-
meable 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 immediatelyun-
der 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 mat erial
per local codes.
569J