Cshd And Cshn Compressors - Trane IntelliPak 1 Installation, Operation And Maintenance Manual

S S e e r r v v i i c c e e a a n n d d M M a a i i n n t t e e n n a a n n c c e e
I I m m p p o o r r t t a a n n t t : : Do Not release refrigerant to the
atmosphere! If adding or removing
refrigerant is required, the service
technician must comply with all federal,
state, and local laws.
• To prevent cross contamination of
refrigerants and oils, use only dedicated
R-410A service equipment.
• Disconnect unit power before
evacuation and do not apply voltage to
compressor while under vacuum.
Failure to follow these instructions will
result in compressor failure.
• Due to the presence of POE oil,
minimize system open time. Do not
exceed 1 hour.
• When recharging R-410A refrigerant, it
should be charged in the liquid state.
• The compressor should be off when the
initial refrigerant recharge is performed.
• Charging to the liquid line is required
prior to starting the compressor to
minimize the potential damage to the
compressor due to refrigerant in the
compressor oil sump at startup.
• If suction line charging is needed to
complete the charging process, only do
so with the compressor operating. Do
not charge liquid refrigerant into the
suction line with the compressor off!
This increases both the probability that
the compressor will start with
refrigerant in the compressor oil sump
and the potential for compressor
damage.
• Allow the crankcase heater to operate a
minimum of 8 hours before starting the
unit.
Charge Storage
Due to the reduced capacity of the microchannel
condenser coil compared to the round tube plate fin
evaporator coil, pumping refrigerant into the
condenser coil to service the refrigerant system is no
longer an option.
Compressor Oil
Refer to for the appropriate scroll compressor oil
charge. Remove and measure oil from any compressor
replaced. Adjust oil in replacement compressor to
prevent excessive oil in system. Anytime a compressor
is replaced, the oil for each compressor within the
manifold must be replaced.
The scroll compressor uses Trane OIL00079 (one quart
container) or OIL00080 (one gallon container) without
substitution. Discoloration of the oil indicates that an
abnormal condition has occurred. If the oil is dark and
140
smells burnt, it has overheated because of the
following:
• Compressor operating at extremely high
condensing temperatures
• High superheat
• A compressor mechanical failure
• Occurrence of a motor burnout.
If a motor burnout is suspected, use an acid test kit
(KIT15496) to check the condition of the oil. Test results
will indicate an acid level has exceeded the limit if a
burnout occurred. Oil test kits must be used for POE oil
(OIL00079 for a quart container or OIL00080 for a gallon
container) to determine whether the oil is acidic. If a
motor burnout has occurred, change the oil in both
compressors in a tandem set.

CSHD and CSHN Compressors

CSHD and CSHN compressors have an oil drain valve
which allows the oil to be drained out of the
compressor. After the refrigerant has been recovered,
pressurize the system with nitrogen to help remove the
oil from the compressor.
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.
Figure 111. PTFE gasket
RT-SVX072A-EN