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SS-SVX09A-EN 93
System Start-Up
14. Turn the 115-volt control circuit switch 1S2 to the “OFF” position and open the field provided
or optional factory mounted disconnect switch.
15. After shutting the system off, check the compressor oil appearance. Discoloration of the oil
indicates that an abnormal condition has occurred. If the oil is dark and smells burnt, it has
overheated because of: compressor is operating at extremely high condensing temperatures;
high superheat; a compressor mechanical failure; or, occurrence of a motor burnout.
If the oil is black and contains metal flakes, a mechanical failure has occurred. This symptom
is often accompanied by a high compressor amperage draw.
If a motor burnout is suspected, use an acid test kit to check the condition of the oil. Test results
will indicate an acid level exceeding 0.05 mg KOH/g if a burnout occurred.
Compressor Oil
The scroll compressor uses Trane OIL-42 without substitution. The appropriate oil charge for
a 9 and 10 Ton scroll compressor is 8.5 pints. For a 14 and 15 Ton scroll compressor, use 13.8 pints.
Compressor Crankcase Heaters
9 and 10 ton scroll compressors have a 100-watt heater installed. 14 and 15 ton scroll compressors
have two 80-watt heaters installed per compressor.
Table 13. Pressure Control Switch Settings
Pressure Switch Make Break
Hi Pressure 350 psi 405 psi
Lo Pressure
EVPB
All others
60 psi 45 psi
40 psi 30 psi
Condenser Fan Cycling switch 275 psi 155 psi
(EVP only w/HGB - wo/HGB) std.
Lo Ambient Thermostat 33 F 30 F
Compressor Winding T-Stat 181F 221 F
Note: Pack Stock units will have both low pressure switches shipped and the user should use the above valves that apply
Table 14. Recommended Refrigerant Capacities
Capacity
Total Interconnecting Line Length
50 100 150
Approximate Total System Refrigerant Charge (Lbs. Per Circuit)
20 Ton495664
25 Ton587387
30 Ton718599
40 Ton465361
50 Ton567085
60 Ton688297
Table 15. Minimum starting Ambient Temperature
Minimum Starting Ambient (1)
Standard Units Low Ambient Units