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RT-SVX24Q-EN
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.
CSHN Compressors
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.
Figure 147.
PTFE gasket
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 148.
CSHN
Oil equalizer Rotolock
connection fitting
¼ Schrader port
Oil drain valve
VZH Variable Speed Compressors
Refer to
for VZH117 oil removal
procedures.
VZH variable speed compressors include the addition
of an oil injection solenoid valve (2L11) to provide
supplemental oil flow from an internal gear pump to
the scroll thrust bearing surface. The solenoid is de-
energized at low compressor speeds to allow
supplemental oil flow and ensure thrust surface
lubrication. The solenoid is energized at high
compressor speeds to stop supplemental lubrication.
This prevents excessive oil circulation to the system.
The solenoid is controlled by the inverter and switches
at 3300 RPM for the VZH117, and 2700 RPM for the
VZH170.
The 24 VAC solenoid coil operation can be checked on
one of the solenoid leads with a clamp on amp meter.
Above 3300 RPM (VZH117) /2700 RPM (VZH170), the
amp meter should read about 0.5 amps to indicate
supplemental flow has been stopped.
Содержание IntelliPak 2 Series
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