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23.1
A
A
26.1
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
8 716 107 337b (11/05)
23.2
24.1
25.1
26.2
REPLACEMENT OF PARTS
23. Pump head
Ensure the boiler is fully drained).
Disconnect the electrical connection from
the bottom of the pump.
23.1 Remove the four Allen bolts (A) securing the
pump at each corner.
23.2 Gently pull the pump towards you and
remove.
To refit, follow the above in reverse.
Pressure gauge
Ensure the appliance has been fully drained.
Withdraw the spring clip from the pressure
sensing head housing.
Undo the nut on the rear of the pressure
gauge.
Remove the pressure sensing head and
pressure gauge capillary from the housing.
To refit, follow the above in reverse. DO NOT
omit the washer from the capillary when
fitting a replacement gauge.
24. Flow sensor, flow restrictor
housing and filter
Ensure the domestic hot water circuit is fully
drained.
Disconnect the electrical connection to the
turbine.
Remove the spring clip from the housing and
move the brass pipe to one side.
24.1 Withdraw the flow sensor and filter from the
housing.
Using the cartridge tag, withdraw the flow
restrictor housing. If the regulator housing
has become stuck, a pair of long nosed pliers
may be used to grip the housing.
To refit, follow the above in reverse. Ensure
any seals that have been disturbed are
renewed.
25. Flow regulator
Remove the flow restrictor housing (See
Removing the flow sensor, flow restrictor
housing and filter).
25.1 Using a small Allen key or similar, push the
flow restrictor cartridge out of it's housing.
To refit, follow the above in reverse. Ensure
any seals that have been disturbed are
renewed.
26. Drain tap
Ensure the appliance has been fully drained.
26.1 Rotate the drain tap fully anticlockwise.
26.2 Withdraw the drain tap from its housing
To refit, follow the above in reverse. Ensure
any seals that have been disturbed are
renewed.
REPLACEMENT OF PARTS
48
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