Air to Water Heat Pump (Split integrated DHW type)
12 Maintenance
12 .1 Emptying the hydraulic unit
- Remove the front panel from the hydraulic unit.
- Place the distribution valve in the middle position.
- Open the emptying valve (ref. 5).
- Open the hydraulic unit's manual bleed-tap (ref. 6).
- Open the installation bleed tap.
12 .2 Distribution valve
Carefully comply with the direction for fitting the
distribution valve:
Channel AB : Inlet to the hydraulic unit .
Open channel A : Return from DHW tank.
Open channel B : Return from the heating circuit.
12 .3 ACI check
- Check polarity.
- Check
voltage: The appliance powered on, the
voltage value must be positive and lie between 0 + and
+ 6.5 V dc.
Check ACI voltage
U = + 0
ACI connecting:
-
The
on the tank mass.
+
The
on the electrode connector.
Installation and operating manual "1768 - EN"
to
+ 6,5 V
figure 60 - ACI check
Heating circuit
return
Valve
Inlet to the
Exchanger
return from DHW tank
figure 59 - Fitting the distribution valve
Connecting
Valve motor
- 75 -