Atlantic alfea extensa duo+ - Unit Maintenance

B
A
AB
Inlet to the
Exchanger
Heating circuit
return
 gure 49 - Fitting the distribution valve
Return from DHW tank
Valve
Valve motor
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  tting the
distribution valve:
Channel AB : Inlet to the exchanger (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.
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.
U = + 0 + 6,5 V
Check ACI voltage Connecting
ACI connecting:
The on the tank mass.
The on the electrode connector.
-
+
to
 gure 50 - ACI check
Emphasise that a heated  oor has signi cant inertia
and that therefore any adjustments must be made
progressively.
Also explain to the user how to check the  lling of the
heating circuit.
Installation and operating manual "1578 - EN" - 63 -
Heat Pump alféa extensa duo +