ALHENA TECH H
Fan replacement
•Disconnect the power supply and close the gas cock ahead of the valve.
•Remove the fan electrical connections.
•Undo the screws "1" and gas pipe connection "2".
•Remove the venturi "3".
1
1
2
fig. 55
fig. 54
Replacing the pressure transducer
Before carrying out the following instructions it is advisable to protect the room and the boi-
A
ler's electrical box against accidental water spillage.
•Disconnect the power supply and close the gas cock ahead of the valve.
•Drain the water from the heating circuit.
•Remove the pressure transducer connector and retaining clip "1".
•Remove the pressure transducer "2".
2
1
fig. 56
343
EN
cod. 3541V622 - Rev 00 - 05/2022