16
66..77 WWaatteerr GGoovveerrnnoorr
TToo cclleeaann
- Turn off the cold water supply to the appliance and
drain into receptable.
- Remove the governor situated in the base of the
water section (A) (see fig. 21).
- Clean the components with water and grease see
Section 6.11.
- Check that the spring loaded piston moves freely.
- Replace in reverse oder.
66..88 GGaass aanndd WWaatteerr FFiilltteerrss
GGaass aanndd wwaatteerr iinnlleett ffiilltteerrss aarree ffiitttteedd bbeettwweeeenn tthhee
iinnlleett sseerrvviiccee ccoocckkss aanndd tthhee aapppplliiaannccee..
- To clean, turn off the gas supply at the meter and
the service cocks, unscrew the union nuts atta-
ching the cocks to the appliance and remove the
filters (see fig. 22).
- Clean the filters by blowing or washing in water, DO
NOT USE ANY SOLVENTS.
- Replace ensuring that the coarse filter is fitted in the
water inlet and the fine filter in the gas inlet.
- Turn on the gas supply and open both water and
gas service cocks.
- Test for soundness.
66..99 MMiiccrroosswwiittcchh
The microswitch operating mechanism is factory set and if the microswitch requires replacement or adjustment
see Section 5.4. and proceed as in Section 7.12 and 7.13.
FFiigg.. 2211
FFiigg.. 2222
66..1100 PPrreessssuurree sswwiittcchh
The pressure switch is factory set and it the pressure switch requires adjustment or replacement, see Section 5.5.
and proceed as in Section 7.10 and 7.11.
66..1111 GGrreeaassiinngg ooff CCoommppoonneennttss
Care should be taken during the annual service of an appliance to grease the gas valve spindle (see Section 6.6)
water Gover
nor (see Section 6.7) and the bearing plate spindle (see Section 7.5).
Use silicone gr
ease.
66..1122 HHeeaatt IInnppuutt
It is a r
equir
ement of the Gas Safety (Installation and Use) Regulations 1984 that the bur
ner pr
essure and gas
rate ar
e checked each time an appliance is ser
viced, likewise the service engineer should satisfy himself with
regard to gas soundness and the adequacy of combustion and ventilation air if this is appropriate.
The heat input is pr
eset and non-adjustable.
The heat input and bur
ner pr
essur
e should be checked (see Section 1.3).
If the heat input/burner pressure is not correct check the working pressure at the pressure test point on the gas
ser
vice cock. This should be 20 mbar (8 in wg).
The gas installation should be examined for any possible blockage if the pr
essur
e is incor
r
ect.
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