Carrier 38AU Routine System Maintenance, Service, Refrigeration System, Equipment Damage Hazard

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

S Condenser coil cleanliness checked. S Return air filter replacement

S Outdoor hood inlet filters cleaned S Belt tension checked

S Belt condition checked S Pulley alignment checked

S Fan shaft bearing locking collar tightness checked S 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

S Condenser fan motor mounting bolts tightness S Compressor mounting bolts

S Condenser fan blade positioning

S Control box cleanliness and wiring condition S Wire terminal tightness

S Refrigerant charge level S Evaporator coil cleaning

S Evaporator blower motor amperage

Heating

S Power wire connections

S Fuses ready

SManual-reset limit switch is closed

Economizer or Outside Air Damper

S Inlet filters condition

S Check damper travel (economizer)

S Check gear and dampers for debris and dirt

SERVICE

Refrigeration System

!CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in damage to equipment.

This system uses PuronR refrigerant 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.

Compressor Oil —

!CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this 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 water readily. 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.

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 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 immediately un- 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 material per local codes.

38AU

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