17
77.. RREEPPLLAACCEEMMEENNTT OOFF CCOOMMPPOONNEENNTTSS
Before commencing any work involving component replacement :
11..
Isolate electrical supply.
22..
T
urn off gas at the gas service cock.
33..
Turn off water at the water inlet cock.
44..
Drain the appliance by opening hot water outlet tap and removing the drain plug in the water service cock.
55..
Remove the front casing (see Section 6.1).
77..11 TThheerrmmooccoouuppllee
-
Remove the burner (see Section 6.2).
- Remove the pilot (see Section 6.3).
- Trace the thermocouple and disconnect at the ter-
minal on the PCB.
- Disconnect at thermoelectric valve by undoing nut
(A) (see fig. 23).
- With a 7 mm boxspanner, unscrew the nut (B) holding
the thermocouple into the gas section (see fig. 24).
- Thread the thermocouple and wire up through the
gas section.
- Replace in reverse order.
FFiigg.. 2233
FFiigg.. 2244
77..22 SSppaarrkk EElleeccttrrooddee
- Remove the burner (see Section 6.2).
- Remove the electrode retaining screw (A) (see fig.
25).
- Pull off the electrode cable from the piezo cartridge.
- Lift the electrode out of the gas section.
- Re-assemble in reverse order, and note that the slot
in the connector on the end of the electrode cable
is vertical when pushed onto the cartridge.
NNOOTTEE
: Spark gap is 3-5 mm.
FFiigg.. 2255
77..33 TThheerrmmooeelleeccttrriicc vvaallvvee
- To renew, remove the thermocouple conductor
lead nut (A) (see fig 26).
- Unscr
ew cap (B) fr
om the side of the gas section
and withdraw the ther
moelectric valve.
NNOOTTEE
: This heater is fitted with a safety interlock.
When the pilot is turned off, the appliance cannot be
relit until the thermocouple cools down and the ligh-
ting sequence is repeated.
FFiigg.. 2266
77..44 WWaatteerr SSeeccttiioonn VVeennttuurrii
·-
Disconnect the right hand heating body leg fr
om the
water section and remove the venturi (A) (see fig 27).
- Clean or replace as necessary and the re-assemble
in r
everse or
der
.
FFiigg.. 2277
A
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