Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06
Alarms and shutdowns
Measuring Min. Max. Factory Note
Process in temperature
(°C)
High shutdown
High alarm
Low alarm
Low shutdown
-60
-60
-100
-100
100.0
100.0
100.0
100.0
60.0
50.0
4.0
2.0
1+6
1+6
1+6
1+6
Suction gas superheat
(°C)
Calculated value
High shutdown
High alarm
Low alarm
Low shutdown
6.0
5.0
0.0
0.0
120.0
120.0
40.0
40.0
110.0
100.0
4.0
2.0
2+7
2+7
2+10+13
2+10+13
Discharge gas superheat
(°C)
Calculated value
Low alarm
Low shutdown
Set point 1
Set point 2
5.0
0.0
0.0
0.0
65.0
65.0
999.9
999.9
20.0
10.0
5.0
10.0
2+10+13
2+10+13
23
23
Table 15: Measured and calculated pressure levels and temperatures - HPO/HPC/HPX
Measuring Min. Max. Factory Note
User input 1
(4-20 mA)
High shutdown
High alarm
Low alarm
Low shutdown
-999.9
-999.9
-999.9
-999.9
999.9
999.9
999.9
999.9
0.0
0.0
0.0
0.0
3+18
3+18
3+18
3+18
Table 16: 4-20 mA User input 1 signal
2.1.7 Notes
Note 1 Shutdown cannot be switched off until the problem has been solved.
Note 2
Shutdown can be switched off immediately ( /RESET key).
Note 3 Shutdown is switched off automatically.
Note 4
Safety limits can be entered in bar or °C/R.
Note 5
Shutdown monitoring active when digital output compressor starting signal has
been activated.
Note 6
Shutdown monitoring always active
Note 7
Shutdown monitoring delayed 300 sec. after compressor start.
For reciprocating compressors, the Oil temperature low delay after start is adjust-
able. If the Oil temperature low delay is set to 0 (zero) seconds, the oil temperature
shutdown and alarm supervision will also be activated during compressor standstill
thus preventing the compressor from starting with too low oil temperature.
Note 8
Shutdown monitoring delayed 180 sec. after compressor start.
Note 9a
Shutdown monitoring delayed 45 sec. after compressor start.
Note 9b Shutdown monitoring delayed 45 sec. after compressor start.
Note 9c
Shutdown monitoring delayed 15 sec. (the Start unload timer setting)
after compressor start.
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