Ariston microGENUS II 31 MFFI - 6.4.2 REMOVING THE GAS VALVE (HONEYWELL); 6.5 ACCESS TO THE WATER CIRCUIT; 6.5.1 REMOVING THE D.H.W. (SECONDARY) EXCHANGER

Important! Before any component is removed, the boiler
must be drained of all water.
6.5.1
Removing the D.H.W. (secondary) exchanger
1.
Remove the screws “X” (FIG 6.34);
2.Disconnect the cable “Y” (FIG 6.35);
3.Push the insulation of the exchanger towards the rear
of the boiler, and lift upwards and remove from the
front of the boiler (FIG 6.36);
4.Push the exchanger towards the rear of the boiler, and
lift upwards and remove out of the front of the boiler
(FIG 6.37);
5.Before replacing the exchanger ensure that the O-rings
are in good condition and replace if necessary.
6.5 ACCESS TO THE WATER CIRCUIT
FIG. 6.34
X
X
FIG.
6.35
FIG. 6.36
FIG. 6.32
FIG.
6.33
W
W
6.4.2 Removing the gas valve (Honeywell)
Important! Before removing the gas valve, ensure the
gas supply is tur
ned off.
1. Disconnect all the cables from the solenoid and
modureg;
2. Remo
ve the spark generator (see previous section);
3. Release the n
uts “V” (F
IG.
6.31);
4. Remove the screws “W” from the bottom of the gas
valve (FIG. 6.32);
5. Remove the gas valve (FIG. 6.33).
FIG. 6.31
V
V
Y