78
b) P21 = 3 with energy optimisation (Available only if P42 = ALCO or CIAT)
If P180 = 3 stages: 15-30% and 70-85% for stages 2-3
If P180 = 2 stages: 20 and 80% for stage 2
The values of P181 and P183 must be set.
P181 = 17.8 b for R410A, 12 b for R407C, 11.0 b for R22 and
6.8 b for R134a
P183 = 7.8 b for R410A or 5.5 b for R407C, 5.0 b for R22 and
3.8 b for R134a
In this case parameters P181 and P183 can be adjusted (resolution of 0.1) and parameter P184 becomes needless and therefore inaccessible.
The minimum value of P181 becomes 16 bar for R410A.
The minimum value of P183 becomes 8 bar for R410A.
17.3.2 Fan speed control with intertwined coils (P11 = intertwined):
Speed control mode is turned on as soon as the unit is on.
With 1 circuit running: speed is controlled by the circuit‟s HP sensor.
With 2 circuits running: the speed is controlled by the sensor with the highest pressure.
a) P21 = 2 with acoustic optimisation
1er: stage 1
2ème: stage 2
3ème: stage 3
4ème: stage 4
b) P21 = 3 with energy optimisation (Available only if P42 = ALCO or CIAT)
If P180 = 4 stages: 10-25-40% and 60-75-90% for stages 2-3-4
If P180 = 3 stages: 15-30% and 70-85% for stages 2-3
If P180 = 2 stages: 20 and 80% for stage 2
The values of P181 and P183 must be set.
P181 = 17.8 b for R410A, 12 b for R407C, 11 b for R22 and 6.8 for R134a
P183 = 7.8b for R410A or 5.5b for R407C, 5.0b for R22 and 3.8 b for
R134a
In this case parameters P181 and P183 can be adjusted (resolution of 0.1) and parameter P184 becomes needless and therefore inaccessible.
- The minimum value of P181 becomes 16 bar for R410A. - The minimum value of P183 becomes 8 bar for R410A.
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