B
A
AB
fi gure 55 - Fitting the distribution valve
8 Maintenance
8 .1 Emptying the hydraulic unit
- Remove the facade 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.
8 .2 Distribution valve
Carefully comply with the direction for fi tting 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.
8 .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.
U = + 0
+ 6,5 V
Check ACI voltage
Connecting
ACI connecting:
The on the tank mass.
The
on the electrode connector.
-
+
to
fi gure 56 - ACI check
9 Instructions for the user
Explain to the user how his installation operates, in
particular the functions of the room thermostat and the
programmes accessible to him from the user interface.
Emphasise that a heated fl oor has signifi cant inertia
and that therefore any adjustments must be made
progressively.
Also explain to the user how to check the fi lling of the
heating circuit..
Inlet to the
Exchanger
Heating circuit
return
return from DHW tank
Valve
Valve motor
Installation and operating manual "1572 - EN"
- 67 -
Heat pump air/water split 2 services alféa excellia duo
