Worcester 24ijunior Installation And Servicing Instructions page 28

9 Inlet Water Filter and Flow Restrictor
Remove the flow turbine as described in 16.8 preceding.
Taking care, remove flow restrictor assembly from the flow
turbine. Carefully clean wire mesh by back flushing with water or
replace assembly if necessary. Refer to Fig. 55.
Fig. 55.Inlet water filter
1. Filter
2. Restrictor
10 Control Board
Check that the appliance is electrically isolated.
Remove the clip-on facia cover, cabinet and the connections
cover. Carefully disconnect all the electrical connections. Refer to
Fig. 39.
Remove the facia panel unscrew the four screws and remove the
cover from the rear of the facia.
Lift out the control board. Refer to Fig. 56.
Pull out and transfer the transformer to the board.
Re-commission the appliance to check and set the burner
pressures. Refer to Section 13, Commissioning.
11 Transformer
Unscrew the four screws and remove the cover from the rear of
the facia as described in 16.10 preceding.
Pull out the transformer. Refer to Fig. 56.
Fig. 56. Control board
3
2
1
1. Control panel
2. Rear cover
3. Rear cover fixing screws (4)
2
1
4
5
4. Transformer
5. Control board
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12 Clock/Programmer
Remove the clip-on facia.
Remove the clock/programmer assembly by releasing the clip at
the top of the clock/programmer and ease away from the
control panel being careful not to pull on the connector lead.
Unplug the connector at the control board. Refer to Fig. 57.
Comprehensive instructions are sent with the new control.
Fig. 57. Programmer connection
6
5
3
2
1
1. Facia
2. Control panel (boiler outer casing in place)
3. Programmer cover
4. Programmer location
5. Programmer connections
6. Programmer connector plug
7. Programmer
13 Fan
Remove the inner casing cover.
Remove the fan as described in Section 15.4, Inspection and
Servicing.
Ensure that all the connections are correctly made to the new
fan.
14 Air Flow Detector
Remove the fan as described in Section 15.4.13 Inspection and
Servicing.
Unscrew and withdraw, through the fan outlet, the airflow
detector. Refer to Fig. 42.
7
4