Ariston EURO COMBI A/23 MFFI Onderhoudsinstructies - Pagina 14

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1.5

Access to the

Hydraulic Circuits

Removing the gas valve

1. Disconnect all the cables from the solenoid and

modureg;

2. Remove the spark generator;

3. Release the top nut "S" using a 30 mm open ended

spanner (see fig. 1.31) ;

4. Remove the screws "T" from the bottom of the gas

valve pipe (see fig. 1.32) .

Attention!! The gas valve is connected with the two pipes

(as shown) with an O-ring connection.

Fig. 1.33

Fig. 1.35

Important! Before any component is removed, the boiler

must be drained of all water.

Fig. 1.37

Removing the D.H.W. (secondary)

exchanger

1. Remove the screw "U" (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

replace if necessary.

Fig. 1.34

Fig. 1.36

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