ALHENA TECH C
Extraordinary maintenance and replacement of components
After replacing the gas valve, burner, electrode and PCB, it is necessary to do the calibration pro-
cedure [AUTO SETUP] (see "Calibration procedure [AUTO SETUP]" on page 317). Then follow
the instructions in par. "Checking the combustion values" on page 316.
Gas valve replacement
• Disconnect the power supply and close the gas cock ahead of the valve.
• Disconnect the electrical connectors "1" (fig. 42).
• Disconnect the gas supply pipe "2" (fig. 42)
• Undo the screws "3" (fig. 43)
• Remove the gas valve "4" and the gas diaphragm "5" (fig. 44).
• Fit the new valve, carrying out the above steps in reverse order.
• Refer to the instruction sheet included in the kit when replacing the gas diaphragm.
2
1
fig. 42
3
fig. 43
cod. 3541V512 - Rev 00 - 07/2022
5
fig. 44
5
4
325
EN