Worcester GREENSTAR 25CDi GC Instruction Manual page 50

REPLACEMENT OF PARTS
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INSTALI.ATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 25CDV3OCO'/37Coil42 co,
REPLACEMENT OF PARTS
21. Pump head
.. Ensure the appliance has been fully
drained.
21.1 .. Disconnect the electrical connections
from the pump following steps 1 to 4.
21.2 .. Remove the four Allen bolts (A) secur­
ing the pump at each corner.
21.3 .. Gently pull the pump towards you and
remove .
.. To refit, follow the above in reverse.
22. Pressure gauge
.. Ensure the appliance has been fully
drained .
.. Withdraw the spring clip from the pres ­
sure sensing head housing .
.. Undo the nut on the rear of the pres­
sure 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 capil ­
lary when fitting a replacement gauge.
23. 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 hous ­
ing and move the brass pipe to one side.
23.1 .. 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 dis ­
turbed are renewed,
24. Flow regulator
.. Remove the flow restrictor housing
(See Removing the flow sensor, flow
regulator and filter),
24.1 .. Using a small Allen key or similar, push
the flow restrictor cartridge out of its
housing .
.. To refit, follow the above in reverse.
Ensure any seals that have been dis­
turbed are renewed,
25. Drain tap
.. Ensure the appliance has been fully
drained .
25.1 .. Rotate the drain tap fully anticlockwise.
25.2 .. Withdraw the drain
tap from
its housing.
.. To refit, follow the above in reverse.
Ensure any seals that have been dis ­
turbed are renewed.
AORCESTER
6 '/20 613 7QOa (2006111)