Trane IntelliPak 1, Инструкция по установке, эксплуатации и обслуживанию, Страница: 141 / 164

RT-SVX072A-EN 141
Figure 112. CSHD compressor
524.9
(20.67)
493.9
(19.44)
86.0
(3.39)
Figure 113. CSHN
Oil equalizer Rotolock
connection fitting
¼ Schrader port
Oil drain valve
VZH Variable Speed Compressors
For oil removal and re-charging on VZH088* and
VZH117* compressors, this will require that the oil be
removed using a suction or pump device through the
oil equalizer Rotolock fitting. 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.
ZPS 2-Stage Compressors
For 20 and 25 ton systems which use 2-stage unloading
scrolls, please follow the same oil removal procedure
for VZH088 and VZH117 compressors described in the
section above.
For adding oil to these manifold sets, an oil refill port is
located on the oil equalizer line, as shown in the figure
below.
Figure 114. ZPS 2–stage compressor
Prior to reinstalling the oil equalizer line to each
compressor, replace the PTFE gasket on the oil
equalizer Rotolock fitting on each compressor. See (Fig.
141). Torque Rotolock nut to the values listed in (Table
86).
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.
For oil removal and re-charging on VZH170*
compressors, follow the same procedure described in
“CSHD and CSHN Compressors,” p. 140
VZH variable speed compressors include the addition
of an oil injection solenoid valve (2QM18) 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 3900 RPM for the VZH088, 3300 RPM for the VZH117,
and 2700 RPM for the VZH170.
The 115 VAC solenoid coil operation can be checked on
one of the solenoid leads with a clamp on amp meter.
Above 3900 RPM (VZH088) /3300 RPM (VZH117) /2700
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