Display Indications (Screw Compressors) - Johnson Controls SABROE UniSAB III Engineering Manual

3.2.4

Display indications (screw compressors)

The following table shows the display texts for the limiters.
Limiter
Low suction pressure
High discharge pressure
High motor current
High motor power
Low brine temperature
High water temperature
High differential pressure
High suction pressure
High motor torque
(current)
High internal suction
pressure
Low oil pressure
Start-up limiter
Suction ramp
High discharge
temperature
Separator velocity
Insufficient main
oil pressure
Forced speed
High internal pressure
High suction pressure
gradient
Table 27: Display indications - screw compressors
Overview picture indication
Compressor Compressor
stopped running
Standard Limiters:
Pause Suction lim.
Pause Discharge lim.
Irrelevant Running
overload
Ready Running
overload
Pause Suction lim.
Pause Discharge lim.
Irrelevant Irrelevant
Special limiters:
Ready Suction lim. 1)
Ready Running
overload
Ready Running
overload
Ready Running
overload
Ready Running
overload
Irrelevant Suction lim.
Irrelevant Irrelevant
Irrelevant Running
overload
Irrelevant Running
overload
Irrelevant Irrelevant
Irrelevant Running
overload
Irrelevant Irrelevant
100/346
Compressor control and surveillance
Alarm picture,
Passive indication Active indication
Limiting suction Suction pressure
pressure
Limiting discharge Discharge pressure
pressure
None
None
Limiting brine tem- Brine temperature
perature and
Limiting suction
pressure
Limiting hot Brine temperature
water and
limiting discharge limiting hot water
pressure
Irrelevant
None 2) 3) Suction pressure
None
None
suction pressure
None Low oil pressure
None High suction press
Low oil pressure
Limiting suction
pressure
Irrelevant
High separator flow High separator flow
Low main oil
pressure
None
High internal
pressure
None High suction pres-
Engineering manual - UniSAB III 1.10.8
Alarm picture,
low lim.
high lim.
None
None
low lim. and
limiting brine
temperature
high lim. and
Irrelevant
high lim.
None
High internal
and/or
Irrelevant
Irrelevant
Low main oil
pressure
Forced speed
active
High internal
pressure
sure gradient
001930 en 2021.06