Johnson Controls SABROE Unisab III Control, Engineering Manual

Page: 216 / 348

Engineering manual - UniSAB III 1.10.8
216/346
001930 en 2021.06
Set-up
No. Type of regulator Minimum Maximum
Factory
setting
Unit
2 Normal oil cooling
Set point 1/oil temperature
Hysteresis
35 75 50
5 (fixed)
° C
° C
3 HLI/BLI cooling
Set point 1/discharge pipe temperature
Hysteresis
-20 150 65
2 (fixed)
° C
° C
5 3-way valve
Set point 1/oil temperature
Neutral zone
Prop. band oil cooling
35
0
0
75
100
100
50
4
4
° C
° C
° C
6 HLI-AKV oil cooling
Set point 1/discharge pipe temperature
Neutral zone
Prop. band
-20
0
1
150
10
100
65
0
10
° C
° C
° C
7 HLI 4-20 mA oil cooling
Set point 1/discharge pipe temp.
Neutral zone
Prop. band
T.int.
T.diff.
40
0
1
1
0
80
10
100
999
999.9
65
0
30
10
0
° C
° C
° C
sec.
sec.
8 Thermo pump internal
Set point 1/discharge pipe temperature
70 90 80 ° C
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