Bosch ZSB18 - 2A Installation And Servicing Instructions page 59

AU/NZ
Expansion vessel replacement (removing the boiler)
B Isolate electrical supply.
B Isolate system and gas connections at the service
valves.
B Drain the boiler.
B Disconnect electrical supply and any external
controls.
B Disconnect flue connection from the boiler.
B Undo connection to boiler at the service valves.
1.
Fig. 114 Removing expansion vessel from wall frame
B Release the clip from expansion vessel connection to
the pump manifold.
B Carefully lift the boiler off the mounting frame.
1. Remove the expansion vessel retaining screw.
2. Lift the expansion off the cross beam.
3. Move the expansion vessel towards you to remove.
B Replace expansion vessel in the reverse order and
refit the boiler to the mounting frame.
B Follow the commissioning procedure in this manual.
2.
3.
Service and spares | 59
6 720 646 195a (2010/11)