PRE-START-UP
Evacuate and Dehydrate the entire refrigerant sys- tem by either of the methods described in Carrier Standard Service Techniques Manual, Chapter 1.
Leak Test the entire refrigerant system by the pres- sure method described in Carrier Standard Service Tech- niques Manual, Chapter 1. Use
Turn on Crankcase Heaters for 24 hours before start- ing the unit to be sure all the refrigerant is out of the oil. To energize the crankcase heaters, proceed as follows.
1.Set the space thermostat set point above the space tem- perature so there is no demand for cooling.
2.Close the ®eld disconnect.
3.Turn the fan circuit breaker on. Leave the compressor cir- cuit breakers off. The crankcase heaters are now energized.
Add Preliminary Charge to the refrigerant system ac- cordingly to Carrier Standard Service Techniques Manual, Chapter 1. By the liquid charging method and charging by weight procedure, charge the units with approximately the amounts of
Table 6 Ð Charging Data (R-22)
| REFRIGERANT CHARGE - lb (kg) | CONDENSING | |
UNIT | Required Charge | Outdoor Unit | TEMP |
| Above Clear | Total Charge | DURING |
| Sight Glass | (Approx) | CHARGING - F (C) |
38AE012 | 3.0 (1.4) | 22 (10) | 125 (51.7) |
38AE014 | 4.8 (2.2) | 23 (10.5) | 123 (50.6) |
38AE016 | 3.4 (1.5) | 23 (10.5) | 130 (54.4) |
38AKS024 | 3.4 (1.5) | 28 (12.7) | 131 (54.8) |
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Before Starting Unit ensure the following:
1.Compressor oil level must be at least within sight in the compressor sight glass. Add oil if necessary (see Tables
2.Compressor holddown bolts must be snug, but not tight. Refer to Compressor Mounting section and tag on com- pressor foot.
3.All internal wiring connections must be tight; all barriers and covers must be in place.
4.Electrical power source must agree with unit nameplate rating.
5.All service valves must be open.
6.Crankcase heater must be ®rmly locked into the com- pressor crankcase.
START-UP
To Start Unit Ð Set thermostat set point below the space temperature. After starting unit, there is a delay of at least 3 seconds before compressor starts.
Oil Charge (see Tables
Witco Chemical Corp. . . . . . . . . . . . . . . . . Suniso 3GS Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . WF32 Petroleum Specialties Co. . . . . . . . . . . . . . . . Cryol 150
Do not reuse drained oil or use any oil that has been ex- posed to atmosphere. Procedures for adding or removing oil are given in Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants.
If oil is added, run unit for additional 10 minutes. Stop unit and check oil level. If level is still low, add oil only after determining that piping system is designed for proper oil re- turn and that the system is not leaking oil.
38AKS024 | 38AE012,014,016 |
(06E COMPRESSOR) | (06D COMPRESSOR) |
Fig. 8 Ð Operating Oil Levels
Refrigerant Charge Ð Actual
See Fig.
Never charge liquid into the
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