fig. 52 -
Mounting the distribution valve
Flow towards
exchanger
Return from
the heating circuit
B
A
AB
Return
from DHW tank
Valve
Valve motor
►
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).
►
Distribution valve
Ensure the distribution valve is fitted 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.
►
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.
fig. 53 -
ACI check
Other maintenance
U = +10
+ 13V
Contrôle de l'alimentation ACI
Raccordement
Raccordement ACI :
Le
sur la masse du ballon,
Le
sur le connecteur de l'électrode.
-
+
à
ACI power supply control
Connection
ACI connection:
- to the tank body,
+ to the electrode connector.
to
- 79 -
alfea Excellia HP Duo A.I. / Installation / 1945 - EN