Worcester 24CDi BF Installation And Servicing Instructions Download Page 23

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17. Inlet Water Filter.

Refer to Fig. 34.

Check that the electric supply to the appliance is turned off.
Drain the central heating and domestic circuits as described in
Sections 16.2, a and b.
Hinge down the facia panel into the servicing position as
described in Section 15.3, c.
Follow the procedures as described in Section 15.3,16 and
remove the water diverting valve from the appliance.
Remove the water filter from the cold water inlet.
Discard or clean the filter.
Fit the replacement filter (push fit) in the reverse order.
Reassemble the appliance in the reverse order.
Open the valves and fill and re-pressurise the system as
described in Section 13.2.

18. Water to Water Heat Exchanger.

Refer to Fig. 34.

Check that the electricity supply to the appliance is turned off.
Drain the central heating and domestic hot water circuits as
described in Sections 16.3, a and b.
Hinge down the facia panel into the servicing position as
described in Section 15.3, c.
Remove the bottom panel as described in Section 15.3, d.
Remove the filling loop as described in Section 16.4, 21. Undo
the diverter valve connection. Remove the bolt and circlip and
pull the heat exchanger forward and away from the appliance.
Fit the replacement heat exchanger in the reverse order.
Open the valves and fill and re-pressurise the system as
described in Section 12.2

19. Domestic Hot Water Flow Restrictor.

Remove the water to water heat exchanger assembly as
described in Section 15.4.18.
The plastic flow restrictor is located within the brass housing on
the heat exchanger. Refer to Fig. 34.
Fit the replacement flow restrictor and reassemble in the reverse
order ensuring the fibre washers and ‘O’ rings are in place.

20. Pressure Gauge.

Refer to Figs. 30,34.

Check that the electricity supply to the appliance is turned off.
Drain the central heating circuit as described in Section 16.3, a.
Hinge down the facia panel into the servicing position as
described in section 15.3, c.
Remove circlip and pull out the capillary sensing bulb in the
return manifold.
Prise back the retaining clips securing the gauge to the facia
panel and remove.
Fit the replacement gauge in the reverse order ensuring the “O”
ring is in place.
Open the valves and fill and re-pressurise the system as
described in Section 13.2.

21. Filling Loop.

Refer to Fig. 34.

Check that the electricity supply to the appliance is turned off.
Drain the central heating circuit as described in Section 16.3, a.
Hinge down the facia panel into the servicing position as
described in Section 15.3, c.
Undo the two screws and slide the filling loop assembly to the
left and remove from the appliance.
Fit the replacement assembly in the reverse order.
Open the valves and fill and re-pressurise the system as
described in Section 13.2.

Fig. 31 Filling Loop, Water to Water Heat Exchanger and Domestic Hot Water Flow Regulator

Left hand union connection

Domestic hot water flow regulator

Union connection from
pump - flow pipe
removed

Remove wire clip

Domestic hot water sensor

Copper by-pass pipe

Remove screw
and clamp from
right hand end of
heat exchanger

Pressure valve

Wire clips

Pressure gauge

Water diverting