Johnson Controls SABROE UniSAB III Engineering Manual page 336

Version no.
1.1.0.8 Screw compressors SAB 193 H-355 H
For this high-pressure compressor series new functions have been introduced and ex-
isting functions have been modified:
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Screw compressor SAB 273 S (HPSH 2709)
A new high-pressure screw compressor type has been added.
Recip. compressor HPC 112-HPC 116
Two new high-pressure reciprocating compressor types in the HPC series have been
added.
SAB 120-151, SAB 193-355, SAB 193 H-355 H, SAB 157 HR, SAB 273 S, SABflex
Max limit for Oil separator temperature (low alarm and low shutdown) have been
raised.
SAB 193 H-355 H
A start-up delay, internal timer, is added to disable the liquid slugging function in the
start-up phase.
SAB 120-151, SAB 193-355
The oil temperature high timer has been made changeable between 0 to 300 sec, de-
fault 300 sec.
SAB 120-151, SAB 193-355, SAB 193 H-355 H, SAB 273
For screw compressors with VSD and for high-pressure screw compressors, i.e. when
Manuel Zero > 10%, the capacity slide limits will be lowered for the Main oil pressure
limiter. The passive state high limit has been reduced from 50% to 20%, and the pas-
sive state low limit has been reduced from 40% to 15%.
SAB 120-151
For compressor types with step-regulated Vi, the Vi-position error shutdown function,
used in SAB 193-355, has now been implemented. The Vi-position error function is-
sues an alarm if the capacity drops below 20% for more than 60 seconds, when the
compressor is in Vi mode (slides are pushed together).
SABcube with Danfoss drive
The SABcube compressor now also supports the Danfoss drive and the Modbus RTU
protocol.
Suction pressure gradient supervision
Oil flow control on motor speed
Supervision of discharge temperature difference
Check slide calibration
Check VI slide position
The startup sequence has been modified
Main oil pressure and ECO has been modified
Internal pressure function has been modified
Balance piston function has been modified
Description
Engineering manual - UniSAB III 1.10.8
336/346
Troubleshooting
001930 en 2021.06