14
B029
1.5
Access to the
Hydraulic Circuits
Fig. 1.37
U
U
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.
Important!
Before any component is removed, the boiler
must be drained of all water.
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. 1.34
Fig. 1.35
S
T
T
Fig. 1.36
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