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” (F
IG
6.34);
2.Disconnect the cable “Y” (F
IG
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 (F
IG
6.36);
4.Push the exchanger towards the rear of the boiler, and
lift upwards and remove out of the front of the boiler
(F
IG
6.37);
5.Before replacing the exchanger ensure that the O-rings
are in good condition and replace if necessary.
6.5
A
CCESS TO THE
W
ATER
C
IRCUIT
F
IG
. 6.34
X
X
F
IG
. 6.35
F
IG
. 6.36
F
IG
. 6.32
F
IG
. 6.33
W
W
6.4.2 Removing the gas valve (Honeywell)
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 “V” (F
IG
. 6.31);
4. Remove the screws “W” from the bottom of the gas
valve (F
IG
. 6.32);
5. Remove the gas valve (F
IG
. 6.33).
F
IG
. 6.31
V
V
Y
