Pump; 3-Way Diverter Valve; 3-Way Diverter Valve Motor - Worcester GREENSTAR HE combi Series Installation And Servicing Instructions

Wall mounted condensing boiler for central heating and mains fed domestic hot water
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8.3.3

Pump

B Switch off the appliance.
B Disconnect the appliance from the power supply.
B Remove two switchbox fixing screws (1.). Refer to
fig. 62.
B Lower switchbox (2.).
B Unscrew and remove the the siphon by releasing the
jubilee clip. Refer to fig. 58.
B Unscrew the pump union nuts (3.). Refer to fig. 62.
B Carefully remove the pump and disconnect the
leads.
Alternatively
B After removing the siphon release the four Allen
screws and remove and replace the pump head.
1.
Fig. 62
6 720 610 576 GB (03.02)
3.
1.
2.
8.3.4

3-way diverter valve

B Switch off the appliance.
B Disconnect appliance from the power supply.
B Turn off service cocks.
B Unplug connector from 3-way valve motor. Refer to
fig. 63.
B Pull out retaining clip.
B Remove motor.
B Disconnect the relief valve drain.
B Disconnect the pressure gauge.
B Undo pipe unions.
B Remove 3-way valve.
Fig. 63
After refitting:
B Fill system, bleed and re-pressurise
(see Installation Instructions).
8.3.5

3-way diverter valve motor

B Switch off the appliance.
B Turn off the service cocks.
B Unplug connector from 3-way valve motor. Refer to
fig. 63.
B Pull out retaining clip.
B Remove motor.
Maintenance
39

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Greenstar zwb 7-25 he combiGreenstar zwb 7-30 he combi

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