Removing The Gas Valve; Access To The Water Circuit; Removing The Pump Pressure Switch - Ariston MicroCombi 23 MFFI Servicing Instructions

1.4.3 Removing the gas valve

Important! Before removing the gas valve, ensure the gas
supply is turned off.
1. Disconnect all the cables from the solenoid and
modureg;
2. Remove the spark generator (see previous section);
3. Release the nuts "U" (F
4. Remove the screws "V" from the bottom of the gas valve
(F . 1.31);
IG
5. Remove the gas valve (F
U
. 1.30);
IG
. 1.32).
IG
U
F . 1.30
IG
V
V
F
IG
F
IG
1.5 A
Important! Before any component is removed, the boiler
must be drained of all water.

1.5.1 Removing the pump pressure switch

1. Remove the pump pressure switch electrical connections
"W" (F
2. Unscrew the pump pressure switch by using a spanner on
the nut;
3. Remove the pump pressure switch.
. 1.31
. 1.32
W
CCESS TO THE ATER
1.33);
IG
W
C
IRCUIT
F . 1.33
IG
11