Ariston C - Removing the Domestic Expansion Vessel; Removing the Overheat Thermostat; Removing the Temperature Sensors (Ntcs)

53
Fig. 93
Fig. 96
Fig. 95
Fig. 94
18.3.5 Removing the expansion vessel
18.3.6 Removing the overheat thermostat
1
.
C
arry out step 18.3.1;
2. Isolate the gas supply and disconnect all pipe
c
onnections;
3. Remove the boiler from the wall
4. Unscrew the nut U (see Fig. 97);
1. Remove the casing as in step 18.1.1;
2. Pull off the thermostat connections. Then
remove the thermostat from the pipe by
releasing it’s securing clip (see Fig. 99).
18.3.7 Removing the temperature sensors (N.T.C’s)
1. Remove the casing as in step 18.1.1;
2. Pull off the NTC connections. Then remove
the NTC from the pipe by releasing it’s
securing clip
(see Fig. 100).
5
.
P
ull the expansion vessel to remove it
(
see Fig. 98)
;
6. Reassemble in reverse order.
U