Johnson Controls SABROE Unisab III Control - Page 204

• SABCube 109 - 159
• SABflex 159
Old screw compressor types:
• VMY Mk2 - VMY 447M
• SAB80 - S93
• SAB110 - 163H Mk2
• SAB 202S - SAB 330E
• SAB 128HR-SAB 163HR
• SAB 110SR/LR
• GST13 - GST 25,
• GSV 50L - GSV 900H
• SAB 283 - SAB 355 Mk1
As described you can mount a high pressure transducer set, and select the high pressure
range 25/59/59/59 for a ‘normal’ screw compressor type. Note, however, that the alarm and
shutdown max. limits will still be limited as listed in the tables in subsections 2.1.2. and 2.1.3.
For the compressor type VMY Mk2, however, it is possible to increase the suction pressure,
discharge pressure, discharge temperature and oil temperature alarm/shutdown high limits
and set points to the high pressure settings listed with bold types in Table 47.
It is the responsibility of the operator to make sure that compressor safety is not
compromised when using these high pressure settings.
Measuring Min. Max. Factory Note
Suction pres-
sure
VMY Mk2-2.5
compressor
High shutdown
High alarm
Low alarm
Low shutdown
Set point 1
Set point 2
-
1.5
-1.0
-1.0
-
22.0
20.0
20.0
19.0
19.0
-
5.0
1.5
1.0
-
3+4+5
3+4+5
3+4+5
Discharge
pressure
VMY Mk2-2.5
compressor
High shutdown
High alarm
Low alarm
Low shutdown
Set point 1
Set point 2
4.0
3.0
-
-1.0
53.3
52.8
-
-1.0
52.0
52.0
16.0
15.0
-
-1.0
1+6
1+6
-
1+5
Discharge
temperature
VMY Mk2-2.5
compressor
High shutdown
High alarm
Low alarm
Low shutdown
60.0
50.0
-65.0
-
170.0
170.0
100.0
90.0
-65.0
-
1+6
1+6
Oil tempera-
ture
VMY Mk2-2.5
compressor
High shutdown
High alarm
Low alarm
Low shutdown
40.0
30.0
10.0
0.0
110.0
110.0
50.0
40.0
65.0
60.0
45.0
40.0
2+7
2+7
2+7
2+7
Table 47
Set-up
202/319
Engineering manual - Unisab III 1.10
001930 en 2014.09