Johnson Controls SABROE Unisab III Control, Engineering Manual, Page: 84 / 348

Engineering manual - UniSAB III 1.10.8
84/346
001930 en 2021.06
Compressor control and surveillance
Discharge pressure
In the picture Setup/Compr. Control the parameter Control on must be set to Discharge Side .
Select Setup/Configuration/External input and choose discharge pressure set point control .
Ex.: The actual discharge set point is to vary from +10 to +35 ° C/R corresponding to a change in the cur-
rent signal from 4-20 mA. Move the cursor to 4 mA, press and change the value to +10. Move the cur-
sor to 20 mA, press and change the value +35. Move the cursor to the second line, press and
select Disch. Pressure SP with or . Finish by pressing . The picture will now look like this:
The set point of the discharge pressure regulator is to vary from +10 to +35 ° C/R corresponding to a
change in the current from 4-20 mA. It is possible to follow the set point value by selecting Control val-
ues/Discharge/Pressure Deg./Control and pressing downwards to Actual set point with .
Process out (Hot water) temperature
In the picture Setup/Compr. Control the parameter Control on must be set to Process out temp (Hot
water) . Select Setup/Configuration/External input , and choose process out temperature set point
control .
Ex.: The actual process out set point is to vary from +30 to +65 ° C corresponding to a change in the cur-
rent signal from 4-20 mA. Move the cursor to 4 mA, press and change the value to +30. Move the cur-
sor to 20 mA, press and change the value +65. Move the cursor to second line, press and select
Hot water SP with or . Finish by pressing . The picture will now look like this:
The actual set point of the hot water regulator is now going to change from +30 to +65 ° C corresponding
to a change in the current from 4-20 mA. It is possible to follow the set point value by selecting Control
values/Process temp/Process out temp./Control and pressing downwards to Actual set point with .