Example 2:
On a heat pump unit the inlet temperature must be corrected by the outside temperature.
• If the outside temperature is +30°C, the inlet temperature must be +40°C.
• If the outside temperature is -10°C, the inlet temperature must be +65°C.
In the menu Setup/Compr. Control, adjust Control on to Hotwater and Climate compensation
to Yes. Select an outside sensor in the range -10 - +30°C.
-20 10-10 20 30 40
20
30
40
50
60
70
10
80
Sp 1
T out
T inlet
Sp 2
Fig. 16: Climate compensation, example 2
The settings in the drawing are:
Sp1 = 65°C at To = -10°C and
Sp2 = 40°C at To = 30°C.
Note that Sp1 refer to the lowest and that Sp2 refer to the highest outside temperature.
The straight line indicates the inlet temperature variation under influence of the outside tem-
perature.
Select the menu Control values/Process temp./Process out temp./Control and go down to Set
point 1 and Set point .
Give Set point 1 the value Sp1 = 65°C from Fig. 14.
Give Set point 2 the value Sp2 = 40°C from Fig. 16.
At the same time, set Neutral zone = 3°C and Prop. band = 10°C as starting points. The sys-
tem is now adjusted to the desired function.
Compressor control and surveillance
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Engineering manual - Unisab III 1.10
001930 en 2014.09
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