Johnson Controls SABROE Unisab III Control User Manual

47. Oil return delay
For chiller use only.
At compressor start-up, this timer is used to delay the open/close function for the oil return
valve draining the oil separator.
48. Pump down
For chiller use only.
This timer controls the maximum time the pump down sequence can run after compressor
stop. Pump down is used when the Chiller DX expansion valve control is configured.
This pump down function, where the compressor runs with a closed expansion valve, lets the
compressor run until the suction pressure is below the ”pump down set point” or until the
pump down timer has run out, whichever comes first.
49. PMS delay
After compressor stop it is possible to delay the PMS Start request output signal within the
stated time.
This delay can e.g. be used for pump after-run.
50. Oil pressure low-low delay
For SMC reciprocating compressors.
The low-low oil pressure shutdown will be delayed for the stated time at compressor start.
Set-up
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