Domestic Hot Water Heat Exchanger; Electrode Assembly - Worcester GREENSTAR HE combi Series Installation And Servicing Instructions

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.
6 720 610 576 GB (03.02)
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.
INLET
6 720 610 602 - 05.10
Fig. 65
Maintenance
OUTLET
41