Johnson Controls SABROE UniSAB III Engineering Manual page 216

No. Type of regulator
2 Normal oil cooling
Set point 1/oil temperature
Hysteresis
3 HLI/BLI cooling
Set point 1/discharge pipe temperature
Hysteresis
5 3-way valve
Set point 1/oil temperature
Neutral zone
Prop. band oil cooling
6 HLI-AKV oil cooling
Set point 1/discharge pipe temperature
Neutral zone
Prop. band
7 HLI 4-20 mA oil cooling
Set point 1/discharge pipe temp.
Neutral zone
Prop. band
T.int.
T.diff.
8 Thermo pump internal
Set point 1/discharge pipe temperature
Table 47: Oil cooling setting - screw compressors
4: Oil controller
I
PID
Select PID for applications where a change in the cooling requirement must be met by a fast change in
cooling capacity. PID is selected as standard.
5: Water cooling (reciprocating compressors)
No
Yes
Water cooling output is activated by rising discharge pipe temperature. The set point for this value is set
in Disch. Temp/Parameter, Set point 1. The set point has a fixed hysteresis of 5K.
Example:
Sp 1 = 100°C:
Cooling starts at 100°C and stops at (100-5) = 95°C.
Water cooling output is closed at compressor stop according to adjustable time delay. In Timers/Timer
setup adjust time delay Oil cool on.
Intermediate pressure liquid injection (Two stage reciprocating compressors)
The intermediate pressure liquid injection for TSMC/TCMO compressors is active whenever the com-
pressor is configured to TCMO or TSMC. The solenoid valve for intermediate pressure liquid injection is
activated when the compressor has started and the discharge pipe temperature gets too high. The set
Minimum Maximum
35 75
-20 150
35 75
0 100
0 100
-20 150
0 10
1 100
40 80
0 10
1 100
1 999
0 999.9
70 90
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Set-up
Factory
Unit
setting
50 °C
5 (fixed) °C
65 °C
2 (fixed) °C
50 °C
4 °C
4 °C
65 °C
0 °C
10 °C
65 °C
0 °C
30 °C
10 sec.
0 sec.
80 °C
001930 en 2021.06