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

60 psi

45 psi

All others

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

 

 

 

Total Interconnecting Line Length

 

Capacity

 

50

100

150

 

 

 

 

 

Approximate Total System Refrigerant Charge (Lbs. Per Circuit)

 

20Ton

25Ton

30Ton

40Ton

50Ton

60Ton

49

56

64

58

73

87

71

85

99

46

53

61

56

70

85

68

82

97

Table 15. Minimum starting Ambient Temperature

Minimum Starting Ambient (1)

Standard Units

Low Ambient Units

 

 

SS-SVX09A-EN

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Trane RAUC-C20, RAUC-C50, RAUC-C30 Compressor Oil, Pressure Control Switch Settings, Recommended Refrigerant Capacities

RAUC-C20, RAUC-C40, RAUC-C25, RAUC-C30, RAUC-C60 specifications

Trane, a leader in HVAC solutions, offers innovative air conditioning units designed for superior performance and energy efficiency. Among their advanced products are the Trane RAUC-C30, RAUC-C20, RAUC-C40, RAUC-C60, and RAUC-C50, which cater to various cooling and heating needs in residential and commercial applications.

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