81
- P193 visible If P29 = Yes
Recovery input (10/11 on J6) will be used by the customer to define the operating mode:
STANDARD or RECOVERY
Two operating modes are possible if parameter P29 = Yes:
Contact J6 - 10/11 on motherboard open without recovery:
- Standard fans controlled based on the values of P10, P20 and P21
B) Contact J6 - 10/11 motherboard closed with recovery:
- The turning-on of the fans is shifted using parameter P193 → The HP control setpoint then becomes equal to P181 + P193
- The control logic will then be identical to standard control using the values of P10, P20 and P21.
17.6 Management of the air blades if P10 = Centrifugal
This "all season" option will be offered for air-to-water units with centrifugal fans.
- If P20 = Yes:
Heating mode: The centrifugal fan starts up 3 seconds after the compressor, regardless of the HP1 and HP2 values.
The fan is turned off during defrosting
. The air blades are controlled by the 0-10 V output (terminals 1-2 on terminal block J2 on motherboard) as shown below:
One-circuit unit (or fault on one circuit of a two-circuit unit):
Adjust as shown in diagram 1.
Two-circuit unit and if the compressor on circuit 2 running for at least 5 seconds:
- If HP1 or HP2 < A → Control shown in diagram 1 and taking into account the sensor with the lowest pressure.
- If A < (HP1 and HP2) < C → Control shown in diagram 1 and taking into account the sensor with the lowest pressure.
- If HP1 or HP2 > C → Control shown in diagram 2 and comparison of:
. Voltage U1 = Diagram 1 (lowest HP)
. Voltage U2= Diagram 2 (highest HP)
And voltage U adjusted to highest value of U1 and U2.
- If HP1 and HP2 > C → Control shown in diagram 1 and taking into account the sensor with the highest pressure.
- P20 = No:
Output = 0 V
P 1 9 3 H P S T P S H I F T
D U R I N G R E C O V E R Y
Voltage on actuator
terminals with
compressor off
Compressor start-
up order
Fans on if HP1 or
HP2 < A
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