Trane RAUJ-C20, Installation, Operation And Maintenance Manual

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IIm mp po orrtta an ntt:: Do not spill compressor oil. Refrigerant oil
is detrimental to some roofing materials.
Care must be taken to protect the roof from
oil leaks or spills.
IIm mp po orrtta an ntt:: 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
Compressor Replacement
Discoloration of the oil indicates that an abnormal
condition has occurred. If the oil is dark and smells
burnt, it has overheated, which could be a result of the
following:
• compressor operating at extremely high
condensing temperatures
• high superheat
• compressor mechanical failure
OR
• 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 all
compressors in a tandem or trio set.
CSHD Compressors (20 to 60 Ton)
For CSHD compressors this will require that the oil be
removed using a suction or pump device through the
oil equalizer Rotolock fitting, see
Figure 84, p. 122 . Use
a dedicated device for removing oil. It is good practice
to flush the suction device with clean oil prior to use.
Place a catch pan under the oil equalizer Rotolock
connection fitting on the compressor to catch the oil
that will come out of the compressor when the oil
equalizer tube is removed from the compressor.
Prior to reinstalling the oil equalizer line to each
compressor, replace the Teflon gasket on the oil
equalizer Rotolock fitting on each compressor. See
Figure 85, p. 122 . Torque Rotolock nut to the values
listed in Table 41, p. 123 .
Charge the new oil into the Schrader 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.
CSHN Compressors (80 to 120T)
CSHN compressors have an oil drain valve, see Figure
84, p. 122 , 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.
Figure 84. Scroll compressor external features
Lifting Lug
1/4” Schrader
Valve
Oil Drain
Valve
Oil Equalizer
Rotolock Fitting
Sight
Glass
Figure 85. Teflon gasket
Teflon Gasket
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