53
13.8 Remove/replace gas valve
– Close the gas valve
– remove the front panel (see "Remove panels" on page 48)
– move the control panel (A) into a horizontal position (see "
Rotate control panel" on page 48)
– disconnect the electrical connector (2)
A
Fig. 73
– unscrew the swivel joints (3) and the screws (4)
Fig. 74
– extract the gas valve (5)
the nozzle (6) MUST be used with the new valve
5
6
Fig. 75
13.9 Remove/replace the expansion vessel
– Shut-off the valves to the system and empty the boiler
– remove the front panel (see "Remove panels" on page 48)
– disconnect the pipe (1)
– unscrew the fixing screw (2) on the rear panel
2
Fig. 76
– release the top section (4)
– pivoting around the hook (5), turn and extract the expansion
vessel (3)
4
3
5
Fig. 77
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