Removing The Domestic Expansion Vessel; Removing The Overheat Thermostat; Removing The Temperature Sensors (Ntc's) - Ariston C Operating Instructions Manual

18.3.5 Removing the expansion vessel
1. Carry out step 18.3.1;
2. Isolate the gas supply and disconnect all pipe
connections;
3. Remove the boiler from the wall
4. Unscrew the nut U (see Fig. 97);
U

18.3.6 Removing the overheat thermostat

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).
5. Pull the expansion vessel to remove it (see Fig. 98);
6. Reassemble in reverse order.
Fig. 93
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).
Fig. 95
Fig. 94
Fig. 96
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