Other Maintenance; Emptying The Hydraulic Unit; Distribution Valve; Aci Check - Fujitsu Waterstage Split Comfort 5 Series Installation Manual

Other maintenance

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Emptying the hydraulic unit

- Remove the front panel from the HP.
- Place the distribution valve in the middle position.
- Open the drain valve (ref. 5).
- Open the hydraulic unit's manual bleeder valve (ref. 6).
- Open the installation's bleeder valve(s).
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Distribution valve

Ensure the distribution valve is fi tted in the correct
direction:
- Channel AB: Outlet to the hydraulic unit.
- Channel A open: Return from DHW tank.
- Channel B open: Return from the heating circuit.
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ACI check

- Check polarity
- Check voltage: With the appliance powered on,
the voltage value must be positive and lie between
+10 and +13 V DC.
ACI power supply control Contrôle de l'alimentation ACI
U = +10
Raccordement ACI :
ACI connection:
-
Le sur la masse du ballon,
- to the tank body,
+
Le sur le connecteur de l'électrode.
+ to the electrode connector.
fi g. 54 - ACI check
Waterstage Split Comfort DHW Serie / INSTALLATION / 2125 - EN
à + 13V
to
Return from
the heating circuit
Valve
Flow towards
exchanger
from DHW tank
fi g. 53 - Mounting the distribution valve
Connection Raccordement Raccordement
Valve motor
Return
- 71 -