Johnson Controls SABROE ComPAC, Operating Manual

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Operating manual - ComPAC
34/56 011769 en 2020.03
Design and function
When the oil level in the recovery pot, Fig. 16, is high, the float switch, pos. 1, is activated. The
switch turns on the solenoid valve in the oil recovery system. Incoming discharge gas pushes
down the piston, pos. 3, which blocks the oil drain inlet port. Discharge gas is led into the oil reser-
voir through the small nozzle, pos. 2. The rising pressure forces the oil back into the suction side
of the compressor.
To ensure proper functioning, a timer delays the off-signal from the float switch for a few seconds.
Note: As shown in Fig. 16, the float ball must be positioned with NO facing upwards.
For further information about the oil recovery pot, see chapter 8. Appendices .
Fig. 16: Oil recovery pot
3.2.9 Alarm for high level in the evaporator
The ComPAC has a level switch. If the R717 liquid level becomes too high in the evaporator, the
level switch will stop the compressor. This will protect the compressor against liquid hammering.
See subsection
6.3 R717 charge for correct charge.
Note: The liquid level must never be visible in the inspection glass.
DN2
5
1
NO
NC
2
3
Oil
Oil / R-717
Discharge gas