Johnson Controls SABROE Unisab III Control, Engineering Manual

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Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
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Compressor control and surveillance
The Actual set point shows the regulating value of the inlet temperature at that particular moment.
If the outside temperature is 30 ° C, this value must be 40 ° C. If the outside temperature is -10 ° C, the val-
ue must be 65 ° C. The outside temperature can be seen in % of the measuring range in the picture Con-
trol values/Capacity/Values .
Examples 1) and 2) precondition that the flow temperature is measured with the normal Process Out
PT100 input , but if a temperature transducer of 4-20 mA is installed in a common reservoir using User
input 1 , the outdoor compensation will also be able to work here.
See subsection 3.1.10 User input regulator (Ext. input) where the procedure is exactly the same as the
one described in the above examples as this regulator can also be used for both Cooling and Heating
functions.
In both examples the outlet temperature will rise when outside temperatures fall. If the opposite effect is
required, i.e. rising outlet temperature at rising outside temperature,
Sp1 and Sp2 must be switched.