Carrier 30WI Manual page 93

17 - CONTROL OF CONDENSING PRESSURE FOR AIR-COOLED UNITS
The minimum value of P181 becomes 16 bar for R410A.
The minimum value of P183 becomes 8 bar for R410A.
17.3.3 - 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
b) P21 = 3 with energy optimisation (Available only if P42 = ALCO or VCM)
P181
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.
17.3.4 - Fan speed control with mixed coils (P11 = mixed) :
- 0-10 V output, stage 1, circuit 1, terminals 1-2 on motherboard terminal block J2
- 0-10 V output, stage 1, circuit 2, terminals 2-1 on terminal block J6 of additional board 2
- 0-10 V output, stage 1 common to circuits 1 and 2, terminals 2-3 of terminal block J6 of additional boards 2
- Common stage 1 is controlled by the highest value of the two signals on circuits 1 and 2
- Common stage 3 is turned on as soon as the third control stage for circuits 1 and 2 is turned on.
a) P21 = 2 with acoustic optimisation
V V V
b) P21 = 3 with energy optimisation (Available only if P42 = ALCO or VCM)
P184 P184 P184
P181
P183
Stage 2
Stage 3
Stage 4
15 % 25 % 40 %
P184 P184 P184
P181
1 er
2 ème
3 ème
4 ème
60 % 75 %
P183
1 er
2 ème
3 ème
HP bar
Stage 1
90 %
HP bar
93