Removing The Gas Valve; Access To The Hydraulic Circuit; Removing The D.h.w. (Secondary) Exchanger - Ariston EuroCombi A/23 MFFI Servicing Instructions

W
1.5 Access to the
Hydraulic Circuits
14

Removing the gas valve

1. Disconnect all the cables from the solenoid and modureg;
2. Remove the spark generator;
3. Release the top nut "W" using a 30 mm open ended
spanner (see fig. 1.33);
4. Remove the screws "X" from the bottom of the gas valve pipe (see fig.
1.34).
Attention!! The gas valve is connected with the two pipes
(as shown) with an O-ring connection.
Fig. 1.33
Fig. 1.35
Y
Y
Important! Before any component is removed, the boiler
must be drained of all water.
Removing the D.H.W. (secondary)
exchanger
1. Remove the screw "Y" (see fig. 1.37);
2. Push the exchanger towards the rear of the
boiler, lift upwards and remove out of the
front of the boiler;
3. Before replacing the exchanger ensure that
the O-rings are in good condition and repla-
ce if necessary.
Fig. 1.37
X
X
Fig. 1.34
Fig. 1.36
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