Maintenance; Emptying The Hydraulic Unit; Distribution Valve; Aci Check - Fujitsu WATERSTAGE WOYG112LHT Maintenance Document

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
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