20 Ton - Trane RAUJ-C20 Installation, Operation And Maintenance Manual

Charge the new oil into the Schrader valve or oil drain
valve on the shell of the compressor. Due to the
moisture absorption properties of POE oil, do not use
POE oil from a previously opened container. Also
discard any excess oil from the container that is not
used.
Table 40. Oil charge per compressor
Compressor
CSHD 110 thru 183
CSHN 176 thru 250
Table 41. Torque requirements for rotolock fittings
Compressor
CSHD*
CSHN*
N N o o t t e e : : Always replace gasket when reassembling oil
equalizer lines.
Electrical Phasing
It is very important to review and follow the Electrical
Phasing procedure described in the startup procedure
of this document.
If the compressors are allowed to run backward for
even a very short period of time, internal compressor
damage could occur and compressor life could be
reduced.
If a scroll compressor is rotating backwards, it will not
pump, make a loud rattling sound, low side shell gets
hot, and draw ½ expected amps. Immediately shut off
the unit. Ensure that unit phasing is correct. If the
incorrect phasing is determined to be at one
compressor, interchange any two compressor leads to
correct the motor phasing.
Compressor Circuit Breakers
Table 43. Compressor circuit breakers (200-230 volts)
Voltage
Unit
200

20 Ton

230
200
25 Ton
230
200
30 Ton
230
200
40 Ton
230
SS-SVX11K-EN
Pints
7.0
14.2
Torque (ft-lbs)
64 +/- 12
100 +/- 10
Must Hold
1A / 2A 1B / 2B
50.4 50.4
43.2 43.2
50.4 63.1
43.2 57.1
69.3 69.3
59.4 59.4
50.4 50.4
43.2 43.2
Precision Suction Restrictor
RAUJ tandems with unequal compressors and all
RAUJ trios use precision suction restrictors to balance
the oil levels in the compressors. For manifolded
compressors in RA units, this restrictor is placed in the
compressor indicated in
replacing this compressor, it is imperative that the
proper restrictor is selected from those provided with
the replacement compressor.
When the compressors are restarted verify that correct
oil levels are obtained when all compressors are
running in a manifold set.
Figure 86. Precision suction restrictor
Table 42. Suction restrictor location
Unit Size Circuit
25 Ton 1A
1A, 2A
50 Ton
1C, 2C
80 Ton
1A, 1B, 2A, 2B
100 Ton
120 Ton 1C, 2C
1C / 2C 1A / 2A
- 58
- 49.7
- 58
- 49.7
- 79.7
- 68.3
- 58
- 49.7
M M a a i i n n t t e e n n a a n n c c e e
Table 42, p. 123. When
Compressor
CSHD125
CSHD142
CSHN176
CSHN184
CSHN250
Must Trip
1B / 2B 1C / 2C
58 -
49.7 -
72.5 -
65.7 -
79.7 -
68.3 -
58 -
49.7 -
123