Johnson Controls SABROE UniSAB III - 2.1.4 Measured and calculated pressure levels - reciproc.

Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
43/346
Alarms and shutdowns
Measuring Min. Max. Factory Note
Suction gas superheat (°C)
Calculated value
High shutdown
High alarm
Low alarm
Low shutdown
6.0
5.5
0.0
0.0
120.0
120.0
40.0
40.0
110.0
100.0
2.0
0.0
2+7+12
2+7+12
2+7+10
2+7+10
Discharge gas superheat (°C)
Calculated value
Low alarm
Low shutdown
Set point 1
Set point 2
5.0
0.0
0.0
0.0
40.0
40.0
999.9
999.9
15.0
10.0
5.0
10.0
2+7+10
2+7+10
23
23
Table 10: Measured and calculated temperatures - screw compressors
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 11: 4-20 mA User input 1 signal
2.1.4 Measured and calculated pressure levels - recips.
Measuring Min. Max. Factory Note
Suction pressure
(bar)
High shutdown
High alarm
Low alarm
Low shutdown
-
1.5
-1.0
-1.0
-
9.0
6.0
6.0
-
5.0
2.5
1.5
-
3+5+5+33
3+4+5
3+4+5
Suction pressure gradient (bar/
min)
Calculated value
Optional
High shutdown
High alarm
0.10
0.10
5.00
5.00
0.40
0.20
38
38
Discharge pressure
(bar)
High shutdown
High alarm
Low alarm
Low shutdown
4.0
3.0
-
-1.0
24.2
23.7
-
-1.0
16.0
15.0
-
-1.0
1+6
1+6
-
1+5
Intermediate pressure (bar)
Two stage compressors only
High shutdown
High alarm
Low alarm
Low shutdown
4.0
3.0
-1.0
-1.0
24.0
22.0
10.0
10.0
7.0
6.0
-1.0
-1.0
1+6
1+6
1+6+16
1+6+16
Oil pressure (bar)
Calculated value
CMO/TCMO
SMC/TSMC
High shutdown
High alarm
Low alarm
Low shutdown
Low-low shutdown
5.0
5.0
0.5
0.5
0.0
7.0
7.0
5.0
5.0
1.5
6.0
5.5
4.0
3.5
0.5
2+5+16
2+5
2+5+14
2+5+14
2+5+32
Diff. pressure across oil filter
(bar)
Calculated value SMC100/
TSMC
High shutdown
High alarm
Low alarm
Low shutdown
0.0
0.0
-
-
10.0
7.0
-
-
6.0
4.0
-
-
2+11a
2+11a
-
-
Table 12: Measured and calculated pressure levels - reciprocating compressors