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Compressors

Lubrication

Compressors are charged with the correct amount of oil at

the factory.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in damage to

compone nts.

The compressor is in a PuronR refrigerant system and

uses a polyolester (POE) oil. This oil is extremely

hygroscopic, me aning it absorbs water readily. POE

oils can absorb 15 times a s much water as other oils

designed for HCFC and CFC refrigerants. Avoid

exposure of the oil to the atmosphere.

CAUTION

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could result in personal

injury or death.

Relieve pressure and recover all refrigerant before

system repair or final unit disposal.

Wear safety glasses and gloves when handling

refrigerants.

Keep torches and other ignition sources away from

refrigerants and oils.

WARNING

Replacing Compressor

The compressor used with Puron refrigera nt c ontains a

POE oil. This oil has a high affinity for moisture. Do not

remove the compressor’s tube plugs until ready to i nser t

the unit suction and discharge tube ends.

Compressor mounting bolt torque is 65--75 in-lbs

(7.3--8.5 N-m).

Compressor

Rotation

1. Connect service gauges to suction and discharge pres-

sure fittings.

2. Energize the compressor.

3. The suction pressure should drop and the discha rge

pressure should rise, as i s normal on any start--up.

NOTE: If the suction pressure does not drop and the

discharge pressure does not rise to normal levels:

1. Note that the e vaporator fan is probably also rotating

in the wrong direction.

2. Turn off power to the unit.

3. Reverse any two of the unit power leads.

4. Reapply power to the compressor.

The suction and discharge pressure leve ls should now

move to their normal start --up levels.

NOTE: When the compressor is rotating i n the wrong

direction, the unit makes an elevated level of noise and

does not provide cooling.

Filter Drier

Replace whenever refrigerant system is exposed t o

atmosphere. Only use factory specified liquid--line filter

driers with working pressures no less than 650 psig. Do

not install a suction--line filter drier in liquid line. A

liquid--line filter drier designed for use with Puron

refrigerant is required on every unit.

Condenser -- Fan Adjustment (08D--12D,F size)

1. Shut off unit power supply. Instal l lockout tag.

2. Remove condenser-fan assembly (grille, motor, and

fan).

3. Loosen fan hub setscrews.

4. Adjust fan height as shown in Fig. 14.

5. Tighten setscrews to 84 in-lbs (9.5 N-m).

6. Replace condenser-fan assembly.

CONDUIT

0.14 in +0.0/-0.03

C08448

Fig. 14 -- Condenser Fan Adjustment (08D--12D,F)

Condenser -- Fan Adjustment (14D,F size)

1. Shut off unit power supply. Instal l lockout tag.

2. Remove condenser fan grille.

3. Loosen fan hub setscrews.

4. Adjust fan height as shown in Fig. 15.

5. Tighten setscrews to 84 in-lbs (9.5 N-m).

6. Replace fan grille.

C09094

Fig. 15 -- Condenser Fan Adjustment (14D,F)

Troubleshooting Cooling System

Refer t o Table 1 for additiona l troubleshooting topics.

580J

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 84 85

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Bryant F Manuel d'utilisateur Page 15

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