Johnson Controls SABROE Unisab III Control User Manual

3.3.7 SAB 80 with fitted (mechanical) oil pump
Starting sequence
When the compressor has received starting permission, check if the capacity slide is in mini-
mum position. Before starting the compressor, the oil level switch in the oil separator must be
activated.
Start the compressor.
After a delay of 60 seconds from compressor start, no signal from the level switch for more
than 10 seconds will result in a shutdown.
Alarm surveillance
During start the following alarms are delayed:
Low oil pressure 45 sec.
High filter diff. pressure 300 sec.
Low superheat 300 sec.
High superheat 300 sec.
Low/high oil temperature 300 sec.
See also section 6.5. Timers.
3.3.8 VMY Mk 2 and 2.5 with built-in oil pump
Once the compressor has received starting permission, the pump will start. Make sure that
the capacity slide is in minimum position.
The compressor will start working.
The pump will run for 60 seconds and stop.
Alarm surveillance
During start the following alarms are delayed:
Low oil pressure 45 sec.
High filter diff. pressure 300 sec.
Low superheat 300 sec.
High superheat 300 sec.
Low/high oil temperature 300 sec.
See also section 6.5. Timers.
3.3.9 VMY Mk 3 without full flow pump
Once the compressor has received starting permission, the oil pump will start. Check that the
capacity slide is in minimum position.
The oil is pumped into the compressor lubrication system. As soon as the oil flow switch has
been activated, the prelubrication period will start.
When the time period has expired, the compressor will start and the pump will run for 60 sec.
Compressor control and surveillance
Engineering manual - Unisab III 1.10
001930 en 2014.09
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Johnson Controls SABROE Unisab III Control Specifications

General

Brand	Johnson Controls
Model	SABROE Unisab III Control
Category	Control Systems
Language	English