Worcester 440CDi Manuál s instrukcemi stáhnout pdf (Strana 42)

SERVICING

& SPARES

INSTALLATION & SERVICING INSTRUCTIONS

40

8 716 115 219c (03.2010)

INSPECTION & SERVICE

INSPECTION AND SERVICE

Burner:

NOTE: On re-assembly, replace the seal

Check that the boiler is completely isolated

from the gas supply.

1

Remove the clips (A) and unscrew the

castellated nuts (B).

Remove springs.

Unscrew and remove the two hexagon

screws (C) securing the fan.

Slacken fully the rear securing bolt (D).

Remove the burner cover plate (E).

2

Remove the burner (F) and clean the

components.

Do not use a wire brush.

Re-assemble burner in reverse order using

a new seal (G).

After re-assembly check CO/CO2 levels

as described in the section “Setting the

air/gas ratio”.

For sealed systems only:

Max pressure:

When the heating system water is at

maximum temperature, 2.5 bar must not

be exceeded. If this pressure is exceeded

then an extra expansion vessel must be

fitted into the system return as close as

possible to the appliance.

If the system does not retain the pressure,

the expansion vessel and the heating

system should be checked for leaks.

Electrical wiring:

Check the electrical wiring for physical

damage and replace any damaged wires.

To check the diaphragm in burner cover:

Carefully withdraw diaphragm from fan

intake tube and check for soiling and splits.

Carefully refit diaphragm the correct way

round into the fan intake tube.

Note: The flaps of the diaphragm must

open upwards.

Re- assemble burner in reverse order using

a new seal.

After re-assembly check CO/CO2 levels

as described in the section “Setting the

air/gas ratio”.

To clean the condensate trap:

Remove pipe from condensate pump.

Remove screw retaining trap (F) and push

trap downwards until clear.

Remove trap from boiler along with pipe

to condensate pump.

F

A

B

C

D

F

G

B

D

E

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