Instruction manual

REPLACEMENT OF PARTS
19. Pump head
 Ensure the boiler is fully drained.
 Release the screw securing the pump
electrical cover.
Disconnect the electrical harness from the
terminal block, make a note of the L, N and
earth connections and wire colours.
19.1 Remove the four Allen bolts (A) securing the
pump at each corner.
19.2 Gently pull the pump towards you and
remove.
 To refit, follow the above in reverse, ensuring
that the L, N and Earth connections are
correctly made.
20. Pressure gauge
 Ensure the appliance has been fully drained.
 Withdraw the spring clip from the pressure
sensing head housing.
 Push the pressure gauge bracket up to
release the bracket and gauge from the
frame.
 Remove the pressure sensing head and
pressure gauge capillary from the housing.
 To refit, follow the above in reverse.
DO NOT forget to fit the washer from the
capillary when fitting a replacement gauge.
 Insert the lug on the pressure gauge bracket
into the mounting hole in the frame and pull
down to secure.
21. Drain tap
 Ensure the appliance has been fully drained.
21.1 Rotate the drain tap fully anticlockwise.
21.2 Withdraw the drain tap from its housing
 To refit, follow the above in reverse. Ensure
any seals that have been disturbed are
renewed.
19.2
19.1
21.2
21.1
A
A
SERVICING
& SPARES
REPLACEMENT OF PARTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i/24i System
8 716 115 167b (03/2009)
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