6 720 610 576 GB (03.02)
Maintenance
41
8.3.8
Domestic Hot Water Heat Exchanger
B
Refer to section 7.2.
B
Use new seals when fitting the new heat exchanger.
8.3.9
Electrode assembly
B
Refer to section 7.2.
B
Use a new seal if the existing seal is damaged.
8.3.10 Pressure gauge
B
Drain the appliance.
B
Lower the facia. Refer to fig. 62.
B
Twist the pressure gauge head anti-clockwise to
release it from the casing. Refer to fig. 2.
B
Disconnect the capillary head from the rear of the
diverter valve by withdrawing the clip and pulling out
the head. Refer to fig. 63.
8.3.11 Expansion vessel
B
Drain the appliance.
B
Undo the union connection at the base of the vessel.
Refer to fig. 2.
B
Unscrew the top and bottom fixing screws and
remove the vessel.
B
Set the pressure of the new vessel to that required
by the system.
8.3.12 Pressure Relief Valve
B
Drain the appliance.
B
Disconnect the drain pipe from the valve. Refer to
fig. 30.
B
Pull-out the clip securing the valve.
B
Pull-out the valve.
B
Ensure that the replacement valve is fully entered
before fitting the clip.
8.3.13 Burner
B
Refer to section 8.2.
8.3.14 Flow switch
B
Shut the mains water inlet valve and drain the domes-
tic hot water circuit.
B
Pull-off the connectors from the micro-switch.
B
Unscrew the inlet and union connection and remove
the assembly.
B
Reset the domestic hot water flow rate on the new
assembly.
Fig. 65
6 720 610 602 - 05.10
INLET
OUTLET
Summary of Contents for GREENSTAR HE combi Series
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