I/O
Screw
No.
type
compressors
1
Compressor motor
start signal
2
Oil pump start
signal
3
Oil pump 2/cooling
fan start signal
4
-
5
Shutdown
6
Alarm
7
Aux. output
8
Start request
(PMS)
9
Capacity down
10 Capacity up
11 Volume
12 Volume up
13 Economiser - suc-
tion line
14 Economiser – liq-
uid line
15 Oil distribution
pipe
16 Oil cooling (Dual
HLI 2 cooling when
Vi > 85%)
17 Oil cooling (HLI
cooling stop valve)
18 Oil rectifier (Ma-
rine)
19
-
20 Heating elements
Table 33: Numbering of digital outputs
Reciprocating
compressors
Compressor motor
(Compressor mo-
start signal
tor start signal)
Oil rectifier
Additional steps
Water pump start
valve B
signal
-
POV valve
Shutdown
Shutdown
Alarm
Alarm
Aux. output
Aux. output
Start request
Start request
(PMS)
(PMS)
Capacity stage no.
-
1/ Total unload –
additional steps
valve A
Capacity stage no.
-
2/ Valve for ther-
mo pump
Capacity stage no.
SSSTV valve acti-
3/ Valve for ther-
vate
mo pump/ Thermo
pump shaft end
Capacity stage no.
Vi slide activate
4/ Thermo pump
shaft end
Capacity stage no.
5
Capacity stage no.
6
Capacity stage no.
Bypass valve
7/ Intermediate
liquid injection
Oil cooling (oil
temp.) Thermo
pump internal
Water cooling (dis-
charge temp.)
Thermo pump in-
ternal
Oil return
-
-
144/319
SABCube
Chiller
-
-
-
-
Bypass function
(start unload)/Stop
valve for level con-
trol
-
-
Oil return from
evaporator
-
Oil return from
separator
-
Engineering manual - Unisab III 1.10
001930 en 2014.09
History
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