SS-SVX11K-EN
123
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
Pints
CSHD 110 thru 183 7.0
CSHN 176 thru 250 14.2
Table 41. Torque requirements for rotolock fittings
Compressor Torque (ft-lbs)
CSHD*
64 +/- 12
CSHN*
100 +/- 10
NNoottee:: 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.
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 Table 42, p. 123. When
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
Compressor
Suction
Suction
Tube
Suction Restrictor
Table 42. Suction restrictor location
Unit Size Circuit
Compressor
25 Ton 1A CSHD125
50 Ton
1A, 2A
CSHD142
80 Ton
1C, 2C
CSHN176
100 Ton
1A, 1B, 2A, 2B
CSHN184
120 Ton
1C, 2C
CSHN250
Compressor Circuit Breakers
Table 43. Compressor circuit breakers (200-230 volts)
Must Hold
Must Trip
Unit
Voltage
1A / 2A 1B / 2B 1C / 2C 1A / 2A 1B / 2B 1C / 2C
20 Ton
200 50.4 50.4 - 58 58 -
230 43.2 43.2 - 49.7 49.7 -
25 Ton
200 50.4 63.1 - 58 72.5 -
230 43.2 57.1 - 49.7 65.7 -
30 Ton
200 69.3 69.3 - 79.7 79.7 -
230 59.4 59.4 - 68.3 68.3 -
40 Ton
200 50.4 50.4 - 58 58 -
230 43.2 43.2 - 49.7 49.7 -
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