Worcester 440CDi Manuál s instrukcemi stáhnout pdf (Strana 43)

SERVICING

& SPARES

INSTALLATION & SERVICING INSTRUCTIONS

REPLACEMENT PARTS

8 716 115 219c (03.2010)

REPLACEMENT PARTS

IMPORTANT: Any service work must be

carried out by competent registered

engineers, such as British Gas or other

GAS SAFE registered personnel.

IMPORTANT: After re-assembly the

combustion must be checked using the

procedure in the section “Setting the

air/gas ratio”. Measurement and setting

of the gas ratio must not be attempted

unless the person is equipped with a

combustion analyser conforming to

BS 7927 and is competent in its use.

DRAINING THE APPLIANCE:

Turn off the system heating flow and

return stop cocks - external to boiler.

Using a suitable hose, attach one end

to the drain tap on the boiler return

elbow and lead the other end of the

hose to an external drain point.

Fully open the drain tap on the boiler

return elbow.

Close the drain tap when the flow from

the appliance has stopped and remove

the hose.

NOTE:

A small quantity of water may remain in some

components even after the appliance has been

drained. Protect any electrical components

when removing items from the water circuits.

PCB CONTROL BOARD & TRANSFORMER:

Access to boiler control components

Remove screws (A) to release the cover

from the controller.

PCB Fuse

Remove the fuse (B) and replace with

a spare that are clipped on the inside

of the controller cover.

Transformer / PCB

Disconnect all electrical connections

from the control.

Remove the screws (C) retaining the rear

panel of the control and remove the

panel.

After re-assembly check CO/CO2 levels

as described in the section “Setting the

air/gas ratio”.

CAUTION: TURN OFF THE GAS SUPPLY AND ISOLATE THE MAINS ELECTRICAL

SUPPLY BEFORE STARTING ANY WORK AND OBSERVE ALL RELEVANT SAFETY

PRECAUTIONS.

DRAIN THE BOILER/SYSTEM WHERE NECESSARY AND PROTECT ANY ELECTRICS

FROM WATER INGRESS DURING COMPONENT REPLACEMENT.

IMPORTANT: Refit or replace any components removed from the appliance in the

reverse order using new gaskets/'O' rings/sealant/heat transfer paste where

necessary.

Any 'O' ring or gasket that appears damaged must be replaced. Always check that

any electrical connections are correctly made and that all screws are tight.

AFTER REPLACEMENT OF ANY COMPONENTS ALWAYS CHECK FOR GAS

TIGHTNESS WHERE RELEVANT AND CARRY OUT FUNCTIONAL CHECKS AS

DESCRIBED IN THE COMMISSIONING SECTION.

Spare Fuse order

T1.6A L250V F2

T2.5A L250V F1

T500mA L250V F3

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 59 60

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