CHAFFOTEAUX Corvec Britony II Installation & Servicing Instructions Manual

Supplied By www.heating spares.co Tel. [phone]

chaffoteaux ltd. c%%iiii~

CORVEC BRITONY II

CONFORMS WITH EUROPEAN STANDARD EN.26

installation

servicing instructions

Supplied By www.heating spares.co Tel. [phone]

Page 3

: TECHNICAL DhTA
Pages 4. 5 and 6 : IXSTALLXTION
Pages i. B and 9 : SERVICING [SSTRUCTIONS
Pages 10

and 11

: F.4ULT FINDING CHART FOR CORVEC BRITONY II
Page 12 : SHORT LIST

GENERAL

e CORVEC Britony II is a balanced flue instantaneous gas fired muitipoint water heater. Two models are available,
_ ,rorrnai pressure version for direct connection to the mains coid water supply and a low pressure version for connection
to a coid water storage tank.

The CORVEC Britony II does not require any purpose provided ventilation unless installed in a compartment. A

compartment enclosing the heater requires high and low level openings communicating with outside air or the room in

which the compartment is

Air from room
Air from outside

located. The

free area of these openings must

High Level

102

cm2 (I 5.8 in2)

51

cm2 ( 7.9 in2)

be :

Low Levei

102

cm2 (15.8 in2)

51

cm2( 7.9 in2)

The installation of the heater must be in accordance with the relevant requirements of the Gas Safety Reguiations,
Building Regulations and the

Byeiaws

of the local Water Undertaking. It shouid also be in accordance with any relevant
requirements of the local gas region and iocai authority and the relevant recommendations of the following British
Standard Codes of Practice.

CP 331

-y3
‘CP32

Installation of pipes and meters for town gas
Part 3 - Low pressure installation pipes

Selection and instahation of town gas hot water mppiies. Pati 1 - Domestic premises

-5440 Flues and air supply for gas appliances of rated input not

exceeding

60 kW (1 st and 2nd family gases)
Part 1 - Flues
Part 2 - Air Supply

i’

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technical data

NATURAL GAS

.YA’l-C’RAL c;,\s

Heat mput Nominal.

Heat output Nominal
Gas rate (maximum)
Burner pressure
Main burner mjectors marking &.
Pilot injector marking
Water flow rate . raised 500 C (900 F)
Water tlow rate .
Minimum operating head for normal pressure
Maximum operating head for normal pressure
Minimum operating head for iow pressure
Maximum operating head for low pressure

........................

.......................

........................

...........................

................

.......................

raised 300 C (540 F)

............

............

..........

..........

........

.......

30.27 kW
”

70 kW

m-.

3.81 mjih
15 mbar

113

23

6.5 I/m

11 .l I/m

10m

IOOm

3.5 m
8 m

TABLE 1

103.280 Btu/h

77.450 Btu/h

99.24 ft3/h

6.0 ins

1 A4 g.pm.

2.44 g.pm.
15 p-s-i.

150 psi.

11Jft

26

ft

-

Note : The minimum water pressure is for the correct operation of the heater only. An additionai allowance
must be made for the resistance of the pipework and fittings particuiariy where showers and washing ma&&a
are used. This should be the equivalent of 2 m (6.5 ft) head.

Water iniet
Water outlet

Gas ...................................

Height

Width ..................................

Depth ..................................

Weight .................................

Spaceforftig-Top
Space for fixing .
Space for fling -Sides
Spaceforftig-Front

HOLE FOR WALL LINER

Width ..................................

Height

..............................

.............................

.................................

.......................

Bottom

.................................

.....................

......................

......................

Right hand connection 15 mmcopper

Left hand connection 15mmcopper

Centre connection 15 mmcopper

655 mm

395 mm

253 mm

19kg

65 mm

178mm

NIL

152mm 6.0 ins

305 mm
205 mm 8ins

26 in

15.5 in
10 in

42lb

2.6 ins

7.oins
NIL

12ins

WALL THICKNESS

Standardflueset ..........................

Optionaiflueset ...........................

NB. The low pressure model does not have a temperature selector knob

75-355 mm
75-610 mm

3.14 ins
3-24 ins

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installation

conbustible

rile CORVEC Uritony 11 is supplied in two cartons. one
<ontamtr;c LilL’ heater. the other contammg the balanceu
tlue ser.

INSTALLING THE B;\LANCED FLUE
nle srclndard flue set IS sultabie for walls havmg a thickness

0i 75 mm (3 in) to 355 mm (14 in). Xn optional flue set
<or wali thicknesses up to 610 mm (24 in) IS avatiable to
spectai order.

Detaded recommendations for tlueing are given m BS
5440 : 1. The foilowtng notesare for generai gutdance oniy.

The heater must be installed so that the flue termtnai is
exposed to the external air. The heater must not be ins­talled so rhat the terminal discharges mto another room or
space such as an outhouse or lean-to.

rmmatlon should be on a clear expanse oi wail. the
termtnai preferably being not less than 000 mm 1 .I ft) away
from a corner. recess or projection.

DO NOT install the terminal :

a) within 100 mm (1 ft) measured vertically from the

bottom of sn openable wmdow. air vent or any other

ventiiation opening.
b) within 300 mm (1 ft) above adjacent ground level.
c) within 600 mm (2 ft) of any surface facing the terminai.
d) immediateiy beneath eaves or a balcony.

Where the lowest part of the terminal is less than 2 m
(6.5 ft) above the level of any ground. balcony, flat roof or
place to which any person has access, and which adjoins the
wail in which the terminal is situated. the tet-mtnal must be
protected by a guard of durable materiai. (A terminal guard
is avaiiable from Chaffoteaux Limited).

The air iniet. product outlets duct or termmai oi the heater
must not be closer than 50 mm (2 in) to any combustible

tertal. Detailed recommendations on the protection of

,umbusribie material are given in BS 5440 : I.
PREPARING THE WALL

The heater should be installed on a wall of flat non-com­bustible material that w-ii1 not reverberate. Whatever the
thickness of the wail. make a hole 305 mm ( I? in) wide by
205 mm ( 8 in) high. If the hole is cut accurately there is no
need to iine it as the wail liner will seai off the cavity.

:\ minimum ciearance or SO mm t 3.2 in) should be left
above the top edge ot‘ the wall openmg. For dimenstons and
ilearance see Page .! 2nd fechmcai Data. Puge 3.

Slide thi: wail liner through file wali ensuring that it is

horizontal and chat the tlanged end is flush with the face of

the lns~de w;lil. Trim Lo length LI ncces=ry. so that the
outer end of the duct IS tlush with the t’a<e oi the outside

wail. Make good around ihc wall liner 11’ necessary (fig. 1).

N.B. For walis oi between 75-100 mm (3-J in). turn the
wall liner hooks down through 900

FI’I-I-ING THE FLUE TERMINAL
The flue terminal may be fitted trom mslde or outside of

the building by fixing the two sprmg loaded chains over the
hooks on the instde of the wail liner (fig. ‘1.

Where the termtnai is to be m&led from mstde the buil­ding. it can be passed through the wail liner and pulled back
into posltton by usmg the chams. Where this procedure is
used it must be ensured that there IS no risk that the

terminai can fall. It is recommended that a length of cord
or string is fiyed to the termmai to prevent any risk of
damage to the terminai. the building. or to danger to
persons tn or about the building.

INSTALLING THE HEATER
The heater is attached to the waii by .? studs at the top and

two screws at the bottom. .A further optronai top fting is

provided for instailations where the waU adjacent to the top
fixing hoies is of less than sound construction. The fig
studs. screws and optional cop bracket are packed witk
the gas service tap and a foam gasket and placed in a box
which is found inside the heater.

Remove the front case of the heater by pulling off the gas
control/temperature control knobs and unscrewing the
three ftving screws at the :op. bottom and between the
control knobs. Pull off the front case taking .care not to
loose the rubber spacer behind the centre fixing screw.

Fig. I

pie. 2

Fie. 3

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installation

Remove

Remove the tiue bend from the top of the heat exchanger

hy reieasmg the t‘ixing clip and removtng the two screws.
N.B. It’ ihe oprionai top fucing bracket IS to be used this

Aouid now be attached to the top of the rear case with the
screws aiready ritted to the case (fig. 3).

Using the heater as a template. locate the spigot oi the
qpilance III the wail liner. check that the appliance is
vrrtlcal 2nd mark the four or five fiiing holes. Drill and
piug the wail and fasten the top studs in position. These
studs can be screwed into the wall by locking two nuts
together on the parallel thread and using a spanner.

.-\itach the seit‘ adhesive foam gasket to the flat surface oi
the heater around the air inlet spigot of the rear case.
Remove the protective paper whiie sticking down the gasket.
Lift the hearer into position on the wail. locating on the

stuc1s and the wail liner. Secure the heater to the wail using
*he nuts and screws provided. The hooks fit under the
;IIJCS or’ the top iixing studs (fig. 4).

Trxnsrer the termmai fixing chains from the wail iinet to
these hooas. T’he termmai chains should not be left fixed
to the wail liner hooks.

Slide the rlue duct through the rectangular hole in the rear
case and engage into the central spigot of the termmal so
that it touches the two end stops. Refit the flue bend so

that the flue duct engages by at least 25 mm (1 in). it may
be necessary to cut the flue duct to the correct length. and
ensure that the flue bend is seated correctly on the heat
exchanger with the gasket in place. Replace the two screws

and clip securmg the !lue bend.

Do not refit the front cover until the appliance has been

iommissloned.

GAS CONNECTION

,<emove the piastic cover from the gas inle; which is the

centre connectlon on the bottom of the heater.
Fit the gas service tap provided using the fine filter washer

to seai the connection. Fit the 15 mm dia. copper tail nut
and washer provided to the inlet of the gas service tap and
connect this to the gas supply.

The size of the gas supply pipe from the meter to the
heater oniy should be as follows.

Distance t’rom Meter

outlet to heater

O-3 m t O-IO ftl
3-20 m ( IO-65 ft )

20 m and above

These sizes are for the heater oniy and do not take account
of any other gas appiiances that may be connected to the
same gas servtce pipework.

WATER CONNECTIONS
Remove the plastic covers protectmg the water inlet and

outlet connections.
Fit the water service tap provided to the right hand connec-

tion at the bottom of heater usmg the coarse Mter washer
to seal the connectlon.

Fit the 15 m dia. copper tails and washers provided to the
inlet of the water service tap and to the outlet of the heater
(left hand connection 1.

The water service tap supplied with the heater incorporates
a drain plug.

APPLICATIONS OF THE CORVEC BRITONY II

The heater is designed to serve a variety of hot water draw­off points including washing machines and showers. The
heater can be connected to all the hot water drawaff
points in the installation. but it should be appriciated that

depending upon the temperature seiected. the water flow
available wiil normally only be sufficient for simultaneous
drawaff at a maximum of two points.

The heater is compattbie with most current automatic
washing machines. but care should be taken to ensure thab
the machine is capable of accepting water at the design
flow rate of the heater. Hot and cold fii machines normally

require a hot water temperature of 600 C (1400
heater producing approximateiy 6.5 i/m (1.44 gpm) at
this temperature. (he advice of the washing machine manu­facturers should be sought, but generally it is only neces­sary to remove the water flow restrictor (if fitted) in the
hot water inlet connection of the machine to obtain a
satisfactory heater operation.

Gas Supply

IS mm

‘2 mm

contact British Gas

F), the

TAPS

TO COLD

ALTERNATIVE

POSITION

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installation

520 1337

control

supply

Contact C‘haffoteaux Limited for detatis of those machines
known IO be compatrble with the CORVEC Britony il

The heater can be used to supply hot water to a separate
shower draw-oii. The heater should not be used to suppiy
more than one shower mixing valve. but can supply two
shower heads oif a singie nuxing valve. The recommended
pipework arrangement tbr a smgle shower head is shown
in fig. 5. Only those .‘ittings detailed should be used with

the heater. Chaffoteaux Limited to not supply the water
governor or any shower fittings. For local supplies of
these piease contact :

Water Governor Dereve (Flow Controls) Limited.

Unit 1 1. Middlemore industrtal Estate.
Middlemore Road. Smethwick, Warley,
West Midlands

Tel : 021

Shower Accessories Walker Crosweller & Co Limited,

Whaddon Works. Cheltenham.
Gloucestershire CL52 SEP

Tel .0’42 27953

. -

Do not use the heater with push-on hand showers that fit
over existing hot and cold water taps.

520

1337

1

Turn the gas control knob fully anticlockwise to the main
gas posttion. if the piiot IS now extinguahed for any
reason. return the gas control knob to the off position and
watt approxnnateiy 30 seconds for the safety interlock to
reset Itself.

Turn on an adjacent water draw-oif pomt. the heater will
now light.

Check the burner pressure by fitting a suttable gauge to the
pressure test point on the end of the burner manifold. The
correct pressure is given in Table 1. Page 3. If the burner
pressure is not correct. check that the pressure at the gas
tap test point is 20 mbar (8 ins w.g.) with the appliance
operating. If the inlet pressure is not correct. check for
any possible blockage or restriction UI the pipework to
the heater. If the pressure cannot be corrected contact
your local gas region. The heat input to the heater is preset

and non-adjustable.
For the low pressure model. adjustment of the water flow

rate is necessary. With the burner pressure checked as
before. adjust the water throttle (fig. 6) to give a temp­erature rise of 500 C (900 F). Screw in to increase the
temperature and out ot decrease it.

PIPEWORK
The following notes are for general guidance only.

the heaters performance may be affected if the

6)
installation has old pipework forming dead-legs or air

reservoirs. Always ensure that any old pipework is
either removed or capped off immediately adjacent
to the pipework that will be in use.

(ii) the size of pipework between the heater and the

various draw-off points should be sized to ensure an
adequate flow at all draw-offs when used individually.

PUTTING INTO SERVICE
Open the gas and water service taps beneath the appliance.

Purge the gas and water supplies. Check for gas and water
soundness at all heater and extemai pipework connections.

Remove the gas control knob.
Replace the front cover ensuring that the rubber spacer

is in place behind the centre fixing screw. Refit all fixing
screws. Replace the gas control knob and temperature
control knob ensuring that the knob indicates “hot” when
turned fully clockwise.

Hand the User’s instructions to the consumer and instruct
in the correct and safe operation of the heater.

DRAINING THE HEATER

If the heater is not to be used for long periods it is recom­mended that it be drained. See the Servicing Instructions
for how to dram the heater.

Fit the gas control knob and light the pilot by turning the
knob 900 anti-clockwise. it may be necessary to purge the
pilot gas suppiy, if so, wait a few moments. return the gas

.troi knob to the off position and repeat. (The pilot
jclppiy wiil only purge when the gas controi knob has been
turned 900 anticlockwise).

Fig. 6

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servicing instructions

iv)

Before commencing any servicing work. turn off the gas

and water at the gas and water iniet taps on the appiiance.

RECOMMENDED SERVICING SCHEDULE

For efficient and trouble-free operation. it is ret&mended
that the heater is serviced annuaiiy, The following work
shouid be carried out by a competent person.

Clean the burner

0

Clean the heating body (In hard wafer areas ir may

ii)

be

necessary fo descaie the

Clean the pilot and thermocouple

ii)

Clean the gas and water falters

.V)

Clean the water governor

“)

Change the diaphragm every three years

vij

1)

FRONT CASING

heating body)

To remove, pull off the gas control and temperature
control knobs.

Unscrew the centre futing screw between the control

knobs and the top and bottom fixing screws.

Rep&e in reverse order making sure that the

gasket bet-

ween the burner manifoid and gas section is in place and
that the burner head assembly is correctly located

on the

two spigots at the rear.

3) HEATING BODY

Remove the flue bend from the top of the heat ex&an­ger by ,removing the clip gnd the fwo fixing screws. Lift
the flue bend off the heat exchanger taking care

not to

damage the sealing gasket. The heating body can
exa&ed in posirion, and if external cleaning is s&i­cient, remove the burner and clean the heat exchanger
with a soft brush. detergent and hot water.

To remove the heating body for further cieaning, the
heater must first be drained.

Turn off the wafer iniet tap to the appliance as before
and open an adjacent hot water draw-off
the drain plug from the side of the water
(C - fig. 8) and drain the water from
natively remove the wafer governor plug (D - fs. 8)
the base of the wafer section and drain the

the heater.
governor

Replace the drain down

plug before proceeding.

point:Remove

inlet tap

the heater. Alter-

from

water from

valve and/or water

be

PuII off the case taking care not to loose the rubber
spacer behind the centre ftig point.

2) BURNER

Unscrew the pilot tube clamping screw (A - fig. 7) and

remove the clamp and tube.
Remove the burner manifold by unscrewing the two

screws (B - fig. 7).
MI burner head assembly forward to remove, taking

care not to trap the thermocouple or igniter wires.

The burner head should be turned upside down and

cleaned by brushing.

Remove the burner (see section 2)
Remove the screw holding the bottom of the heating

body skirt to the rear case.
Release the two union nuts joining the heating

body

legs to the wafer section.
Remove the heating body.
In hard water areas it may be necessary to descaIe the

heating body. Use a solution consisting of 5 parts

water to 1

preferably be hot -

part

hydrochloric

acid.

The water should

ADD ACID TO WATER NOT

WATER TO ACID.

Fig. 7

Fig. 8

Fig. 9

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servicing instructions

2

[‘ill the tmtmg body with this soiutm ami leave unrd
ttlc soiutlon stops bubbling. Flush out the hcatmg body
rilorouzidy bciorc rctitting to

W,ARNINC - \CID/W.ATER SOLUTIONS \lUST BE

USED WITH E!CI-REblE CAUTION. T,AKE CARE NOT
TO SPLASH THE SOLUTION ONTO SKIN OR INTO
THE EYES. WASH ANY AREAS AFFECTED WITH

LARGE .4310UNTS OF COLD WATER AND SEEK

MEDICAL ADVICE.

Re-assembie m reverse order ensuring that the skirt
t‘ixing screw and reinforcing strip arc m pisce.

4) PILOT
Unscrew the pliot tube ciamping screw (A - fig. 7). and

remove the ciamp and tube.
Blow through the tube to remove any dust.
Remove the burner (see section 1).
Unscrew the knurled pilot burner outer rmg (E - fig. 9).

Unscrew the piiot body (F - fig. 9), with a 15 mm
spanner. Clean by blowing or washing in water. Do
not clean the holes with a wire.

the

heater.

6)

SPARK ELECTRODE

Remove the burner. XC &XLIUII .!.
Remove the ciectrodc t’ising screw

screwdriver placed inside the hcstmg body
Pull ol‘i the electrode cable t‘rom the p~ezo cartridge.

Lift the eiectrodc out 01. the gss sectIon.

Reassemble in reverse order.
the connector on the
vertical when pushed onto the cartrIdge.

THERMO-ELECTRIC VALVE

7)
To repiace. remove the thermocouple nut (G - fig. IO)

Unscrew cap from the

draw the thermo-electric valve.
NOTE : This heater is

When the pilot is turned off. the heater can not be relit
until the thermocoupie cools down and the lighting
sequence is repeated.

end of

side

ot‘ the gas section and with-

fitted

(J -

fig. 1 I) with a

skirt.

and

note that the slot in

the electrode

with a safety interlock.

cable

is

Blow any dust out of the gas section.
Re-assemble in reverse order.

5) THERMOCOUPLE
Remove the burner. see Section 2.

Remove the pilot. see Section 4.
Unscrew the thermocoupie nut (G - fig. 10) from the

thermo-electric valve and remove it from the wire.

With a 7 mm box spanner. unscrew the nut (H - fig. 11)
holding the thermocouple into the gas section.

Thread the thermocoupie and wire up through the gas
section.

Replace in reverse order.

8) MAIN GAS VALVE
To inspect and clean. remove the burner (see Section 2).

Disconnect the thermocoupie
Section 5 and 6).

Remove the four screws iastenmg the top of the gas
section to the base (K - fig. 12) and the two screws
at the back (L - fig. I?), holding it to the rear case :

Lift the gas section top oif the base.
Remove the complete gas valve assembly by unscrewing

the brass cylinder that has two flats.
Dismantle the gas valve assembly by unscrewing the

hexagonal spring retainer from the top of the assembly.
Remove the spring and gas valve and cleah the valve
seating.

and

igniter lead (see

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servicing instructions

bly

!ieplace c/11’ gas valve lacing rubber and gas valve assem­t>Iv “0” ring 11‘ ricccssarv.

!<~~Ixc 111 reverse order. cnsurtng that the hexagonai
,pru$ rctammg nut 1s screwed fully down and the
whole assembiy is screwed fully down Into the gas
xectlon.

9) DIAPHRAGXI
To replace. turn off the cold water supply and gas.
Drain the heater by removing the water governer plug

situated in the base of the water section.
tinscrew the four water unions (M - fig. 13) on the

ivater sectlon.
tinscrew the SK screws (N - fig. 13) holding the water

12ctlon to the gas section.
[bemove rhe water section complete with the diaphragm.

Replace III reverse order - NOTE - fit the water gover-

nor iast. It is easier if the cold water miet connection is
partially engaged before fitting the screws and re­connectmg the union nuts.

(Jean tjlc t‘ilters t)y blowmg

NOT use any solvents.
Replace erlsuring that the coarse filter

water inlet and the fine t’iltcr in the gas inlet.

12) PIEZO CARTRIDGE
Pull off the electrode from the piezo cartridge.

Remove the screw holding the gas control cam and

remove the cam CP - fig. 15).

Remove the two screws (Q - fig. 15) holding the

retaining piate.
Remove the piezo cartridge and replace if necessary.

13) HEAT INPUT
The heat input is pre-set and non-adjustable. The

heat input and burner pressure should be checked

’ against Table 1.

or washing in water. DO

IS

fitted in the

10) WATER GOVERNOR
To clean. turn off the cold water supply to the heater.
Remove the governor situated in the base of the water

section (0 - fig. 14).

Clean the components with water.
Check that the spring loaded piston moves freely.
Replace in reverse order.

14) WATER SECTION VENTURI

11) GAS AND WATER FILTERS
Gas and water inlet filters are fitted between the inlet

taps and the heater.

To clean. turn off the taps, unscrew the union nuts
attaching the taps to the heater. and remove the filters. order.

If the heat input/burner pressure is, not correct, check
the working pressure at the pressure test point on the

gas service tap. This should be 20 mbar (8 ins w.g.).
The gas installation should be examined for any

possible blockage if the pressure is incorrect.

Drain the heater as in Section 3.
Disconnect the right hand heating body leg at the

water section and remove the venturi.

Clean or replace as necessary and re-assemble in reverse

Supplied By www.heating spares.co Tel. [phone]

PROBLEM

CAUSE

REMEDY

WATER

BURNER STAYS ON

YELLOW FLAMES
SOOT FORMED

TE>lPERATURE

i ) Water rate too high (LP model)

i i ) Insufficient gas ilow

i i i ) Water governor sticking (Mains model:

i v ) Incorrect venturi

v ) No venturi fitted

i ) Air in pipework

i i ) Gas valve stays open

i i i ) Venturi blocked

i v ) Dirt on gas valve facing

v ) Loose jumper on house stop cock tap

v i ) Dirt or foreign matter in water section

i ) Heating body fins blocked

i i ) Primary air suppiy restricted

i i i ) Wrong injectors

Check water regulator
Check rate and user’s tap is open
Remove and clean or replace
Replace (Mains model 3.65 mm

LP model)

Fit

Check for “dead-legs”
Clean and grease gas spindle
Remove and clean
Strip and clean gas valve
Replace water stop tap or pin down
jumper
Clean water section

Remove heating body and clean
Check burner manifold and clean
Check injector sizes

UNSTABLE FLAMES

HEATING BODY

NOISE

[NSUFFICIENT
WATER FL0 W

i ) Water in gas line

i i ) Faulty flue

i) Scale

i i ) Excessive gas

i i i ) Insufficient water flow

i ) Water service tap partly closed

i i ) Blocked venturi

i i i ) Low water pressure

i v ) Water governor faulty

v ) Water governor sticking

v i ) Foreign matter in water section

v i i ) Water reguiator (LP model)

h3e

Check terminal position and flue ducts

Descale heating body
Check gas pressure (see Page 3)

see below

Check it is fully opened
Remove and clean venturi
Check water pressure
Change governor
Remove and clean or replace
Remove and clean
Adjust

Supplied By www.heating spares.co Tel. [phone]

PROB LETvl CAUSE REMEDY

PILOT FLAME DOES NOT

LImn

POOR PILOT FLAME

PILOT WILL NOT
STAY ALIGHT

i ) Gas service tap closed

ii) Airinpipe

i i i ) Pilot injector blocked

a

i v ) No ignition spark

i ) Pilot injector dirty/damaged Clean or change

i i ) Wrong injector

i i i ) Pilot head blocked Clean

i v ) Faulty piiot tube

i ) Thermocouple not working Change thermocouple

i i ) Thermoeiectric vaive faulty Change valve

i i i ) Gas pressure low/variable

i v ) Terminai wrongiy positioned

v ) Badly assembled flue Refit - check sealing

v i )

Gas

pressure too high Check with British Gas

Open service tap
Purge iine
Clean or change
Check electrode. lead and igniter

Change for correct diameter (0.23 mm)

Clean or replace

Check at inlet to heater (see Page 3)
Reposition heater (see Page 3)

MAIN BURNER DOES NOT
LIGHT

SCPLOSrVE IGNITION

SAS CONTROL TAP
ITIFF (USERS)

i ) Gas service tap not open fully

i i ) Gas pressure low

i i i ) Water rate iow

i v ) Gas valve not opening

v ) Diaphragm

v i ) Venturi blocked or loose

v i i ) Gas control tap faulty

v i i i ) Wrong injector

i ) Pilot

i ) Grease dried

i i ) Operating mechanism replaced Refit

iIlCOtTE%tly

punctured

Open fully
Check at manifold and at inlet with
heater running (see Page 3)
Check if water rate is sufficient (Page 3)

Check(v) and (vi)
Change diaphragm
Check venturi
Check operation of User’s gas control tar
Check for correct diameter (1.13 mm)

Check pilot tube and injector

Clean and regrease

Supplied By www.heating spares.co Tel. [phone]

CHAFFOTEAUX LIMITED
Concord House -

Salfords - Redhiii

SURREY RHl 5 DX

HORLEY (02934) 72744

Brighton Road