CHAFFOTEAUX Brittony II.T User guide

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BRITONY 11.1
Room Sealed Balanced Flue
MULTI POINT WATER HEATER
GAS SAFETY (INSTALLATION AND USE) REGULATIONS.
It is the law that aII gas appIiances are installed by a competant person
in accordance with the above regulations.
BRITONY 1I.T NAT G.C. N” 52 980 18
BRITONY I1.T LPG G.C. N” 52 980 23
from seriaI number 8942 16759-03
installation
and servicing instruct2ons
(leave these instructions with the user)
The model number and serial number of this heater are on the data badge which is found inside rear
caseat lower left hand side.
These numbers should be used when ordering replacement parts.
CC
CONFORMS WITH EUROPEAN STANDARD EN.26
Looking Good.Heating Better

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Contents
Page 3 : TECHNICAL DATA
Pages 4, 5 and 6 : INSTALLATION
Pages 7, 6 and 9 : SERVICING INSTRUCTIONS
Pages 10 and 11 : FAULT FINDING CHART FOR BRITONY II T
Page 12 : SHORT LIST
GENERAL
The BRITONS II T is a cat. 112H3+ appliance
9124535.02 BRITONY II T NAT GC N” 52 980 18
9124525.02 BRITONY II T LPG GC N” 52 980 23
The BRITONS II T is a balanced flue instantaneous gas fired multipoint water heater. For direct connection to the mains cold
water supply.
The BRITONS II T does not require any purpose provides ventilation unless installed in a compartment. A compartment enclo-
sing the heater requires high and low level openings communicating with outside air or the room in which the compartment is loca-
ted. The free area of these openings must be :
Air from room
Air from outside
I%ghLevel Low Level
252 cm2 (40 in’) 252 cm2 (40 ix?)
126 cm2 (20 in’) 126 cm* (20 in’)
The installation of the heater must be in accordance with the relevant requirements of the Gas Safety Regulations, Buildings
Regulations and the Bye-laws of the local Water Undertaking. It should also be in accordance with any relevant requirements of
BRITISH GAS and local authority and the relevant recommendations of the following British Standard Codes of Practice.
BS 5440 Flues and air supply for gas appliances of rated imput not exceeding 60 kW (1st and 2nd family gases)
Part 1 - Flues
Part 2 - Air Supply
BS 5546 Code of practise for installation of gas hot water supplies for domestic purposes (2nd family gases)
BS 6891 Specification for installation of low pressure gas pipework of up to 28 mm
(Rl) in domestic premises (2nd family gas)

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technical data
TABLE 1
Heat imput Nom&I ......................................................................................
Heat output NominaI .....................................................................................
Gas rate (maximum) :
l NaturaI gas (G 20) ................................................................................
. Butan (G 30). ........................................................................................
l Propan (G 31). ......................................................................................
Burner pressure (G 20) ..................................................................................
Main burner injectors marking :
l NaturaI gas (restrictor o 5.2) .................................................................
l Butan - propan .....................................................................................
PiIot injector marking :
l Natural gas ...........................................................................................
l Butan - propan .....................................................................................
Water ffow rate - raised 50” C (90’ F) ............................................................
Water flow rate - raised 30” C (54” F) ............................................................
Minimum water pressure ...............................................................................
Maximum water pressure ..............................................................................
Water inlet - right hand connection .................................................................
Water outlet - left hand connection .................................................................
Gas - centre connection .................................................................................
23 kW - 78,480 Btu/h
21 kW - 71,650 Btu/h
2.43 m3/h - 88.1 ft3/h
1.81 kfl
1.79 kg/h
11.6 mbar - 4.5 in w.g
1.18
0.70
0.23
0.15
6 Urn - 1.32 g.p.m.
10.05 I/m - 2.21 g.p.m.
1 Bar - 15 PS.1.
10 Bar - 150 PS.1.
15 mm copper
15 mm copper
15 mm copper
Height ............................................................................................................
Width.. ...........................................................................................................
Depth .............................................................................................................
Weight ............................................................................................................
Space for fling - Top .....................................................................................
Space for fling - Bottom ...............................................................................
Space for fling - Sides ..................................................................................
Space for fixing - Front ............... .,_..
..............................................................
655 mm
395 mm
253 mm
19 kg
65 mm
178 mm
25 mm
152 mm
HOLE FOR WALL LINER
Width .............................................................................................................
Height ............................................................................................................
305 mm
205 mm
WALL THICKNESS
Standard fIue set ............................................................................................
OptionaI ffue set.. ...........................................................................................
75 - 355 mm
75 - 500 mm
The minimum water pressure is for the correct operation of the heater only. An additional allowance must be made for the resisance
of the pipework and fittings particularly where showers and washing machines are used. This should be the equivalent of 2 m (6.5
ft.) head.
3

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installation
The BRITOIW II T is supplied in two cartons, on containing
the heater, the other containing the balanced ffue set.
INSTALLING THE BALANCED FLUE
The standard flue set is suitable for walls having a thickness of
75 mm (3 in) to 355 mm (14 in). An optional flue set for wall
thicknesses up to 500 mm (20 in) is available to special order.
DetaiIed recommandations for flueing are given in BS 5440 :
1. The following notes are for general guidance only.
The heater must be installed so that the ffue terminal is exposed
to the external air. The heater must not be installed so that the
terminal discharges into another room or space such as an
outhouse or lean-to.
Termination should be on a clear expanse of wall, the terminal
preferably being not less than 300 mm (1 ft.) away from a cor-
nern recess or projection.
DO NOT install the terminal :
a) within 300 mm (1 ft.) measured vertically from the bottom of
an openable window, air vent or any other ventilation ope-
ning.
b) within 300 mm (lft.) above adjacent ground level.
c) within 600 mm (1 ft.) of any surface facing the terminal.
d) immediately 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, ffat roof or place to
which any person has access, and which adjoints the wall in
which the terminal is situated, the terminal must be protected by
a guard of durable material. (A terminal guard is available from
QUINNELLBARRETT&QUINNELL,071639 1357.
The air inlet, product outlets duct or terminal of the heater must
not be closer than 50 mm (2 in) to any combustible material.
Detailed recommandations on the protection of combustible
material are given in BS 5440 : 1
PREPARING THE WALL
The heater should be installed on a wall of flat non- combustible
material that will not reverberate. Whatever the thickness of the
wall, make a hole 305 mm (12 in) wide by 205 mm
(8 in) high. If the hole is cut accurately there is no need to line it
as the wall liner will seal off the cavity.
A minimum clearance of 80 mm (3,2 in) should be left above
the top edge of the wall opening. For dimensions and clearance
see page 2 and Technical Data, page 3.
Slide the wall liner through the walI ensuring that is horizontal
and that the flanged end is flush with the face of the inside wall.
Trim to length if necessary, so that the outer end of the duct is
flush with the face of the outside wall. Make good around the
wall liner if necessary (fig. 1).
N.B. : For walls of between 75-100 mm (3-4 in), turn the wall
liner hooks down through 90”.
FITTING THE FLUE TERMINAL
Wall Liner
- For walls of 14 ins. (355 mm) or less, use onIy the flanged wall
liner section, measure and cut to length so that the liner extend
l/4 in. from external wall face. Cut “II” cover section to length.
- Assemble by inserting the tabs on the “U” shaped section into
the slots on the cover.
-Turn the tabs over in the direction of the lip on the cover, fit
hooks with nuts and bolts provided.
- Refit liner into hole and cement into position for a weather
proof finish.
- Ensure that the wall liner is horizontal.
- For walls of over 14 in. assemble the telescopic extension
piece in the same manner as the flanged section.
- Insert inside the flanged section and extend until it extends 114
in. from external wall face, mark around inside of ffanged sec-
tion.
- Remove liner and extension, cut off surplus from extension
leaving a minimum 2 in. overlap making sure extension does
not obscure hooks.
- Re-assemble liner and extension, seal around
with tape supplied.
- Re-fit liner into hole.
- Cement in position for a weather-proof iinish.
- Ensure that the liner is horizontal.
outside of joint
N.B. : For walls 3 in. - 4 in. (75 mm - 100 mm) do not use the
hooks but fit the chains into the slots in the bend fting brackets.
Flue Duct
For the standard iIue set the duct is telescopic and should be
ajusted to length to ensure that is fully engages with the termi-
nal and the flue bend. The joint should be sealed with the tape
supplied.
For walls over 14 in. fit additional telescopic extension piece
(total 3 pieces) ensuring a 2 in. overlap. Seal the joint with the
tape provided.
4

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installation
INSTALLATING THE HEATER
The heater is attached to the wall by 2 studs at the top and two
screws at the bottom. A further optional top fting is provided
for installations where the wall adjacent to the top f&g holes is
of less than sound construction. The fixing studs, screws and
optional top bracket are packed with the gas service tap and a
foam gasket and placed in a box which is found inside the car-
ton.
The size of the gas supply pipe from the meter to the heater only
should be as follows.
Distance from Meter
outlet to heater Gas Supply
Remove the front case of heater by pulling off gas control/tem-
perature control knobs, slide facia plate upwards to expose case
furing screw, and unscrewing the three fting screws at the top
case taking care not to lose the rubber spacer behind the centre
ftig screw.
O-3 m (O-loft.) 15 mm
3-20 m (lo-65 ft.) 22 mm
The sizes are for the heater only and do not take account of any
other gas appliances that may be connected to the same gas
service pipework.
WATER CONNECTIONS
Remove the flue bend from the top of the heat exchanger by
releasing the fling clip and removing the two screws.
N.B. : If the optional top fixing bracket is to be spigot of the
appliance in the wall liner, check that the appliance is vertical
and mark the four or five fixing holes. Drill and plug the wall 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.
Remove the plastic covers protecting the water inlet and outlet
connections.
Fit the water service tap provided to the right hand connection
at the bottom of heater using the coarse falterwasher to seal the
connection.
Attach the self adhesive foam gasket to the ffat surface of the
heater around the air inlet spigot of the rear case. Remove the
protective paper whiie sticking down the gasket. Lift the heater
into positon on the wall, locating on the studs and the wall liner.
Secure the heater to the wall using the nuts and screws provi-
ded. The hooks fit under the nuts of the top f&ng studs (fig. 4).
Transfer the terminal fting chains from the wall liner to these
hoods. The terminal chains should not be left fixed to the wall
liner hooks.
Fit the washers provided to the inlet of the water service tap and
to the outlet ot the heater (left hand connection).
The water service tap supplied with the heater incorporates a
drain plug.
APPLICATIONS OF THE BRITONY II T
Slide the flue duct through the rectangular hole in the rear case
and engage into the central spigot of the terminal 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 ffue duct to the correct length, and ensure that the Rue
bend is seated correctly on the heat exchanger with the gasket
in place. Replace the two screws and clip securing the iIue bend.
Do not refit the front cover until the appliance has been com-
missioned.
The heater is designed to serve a variety of hot water draw-off
points including washing machines and showers. The heater
can be connected to all the hot water draw-off points in the ins-
tallation. If more than one outlet is open simultaneously the total
flow of water cannot exceed that quoted in the Technical data.
GAS CONNECTION
The heater is compatible with most current automatic washing
machines, but care should be taken to ensure that the machine
is capable of accepting water at the design iIow rate of the hea-
ter. Hot and cold frl machines normally require a hot water tem-
perature of 60” C (140” F), the heater producing approximately
6,5 l/m (1,44 g.p.m.) at this temperature. The advice of the
washing machine manufacturers should be sought, but general-
ly it is only necessary to remove the water inlet connection of
the machine to obtain a satisfactory heater operation.
Fit the gas service tap provided using the fine filter washer to Chaffoteaux do not recommend the use of a bath/shower type
seal the connection. Fit the 15 mm dia. copper tail nut and mixing valve with the Britony range of water heaters. It has been
washer provided to the inlet of the gas service tap and connect found that the characteristics of these type of iittings are such
this to the gas supply. that a coarse and unsatisfactory shower results.
HOT WATER
TO HOT TAPS I COLD WATER
TO COLD TAPS
Fig. 4
5

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installation
Contact Chaffoteaux Limited for details of those machines know
to be compatible with the BRITONS II T.
The heater can be used to supply hot water to a separate sho-
wer draw-off. The heater should not be used to supply more
than one shower mixing valve, but can supply two shower
heads off a single shower head is shown in fig. 5. Only those iit-
tings detailed should be used with the heater. Chaffoteaux
Limited do not supply the water governor or any shower fittings.
For local supplies of these please contact :
(III) A check should be made of all stop cocks in the incoming
supply and it should be ensured that they are of the fixed
jumper pattern. Loose jumpers can be pinned or soldered
into position.
(IV) If the appliance is installed on a supply or distribution pipe
containing a non-return valve, combinations of check valve,
or any equipment containing such devices, then provision
must be hade to accomodate an expansion of at least 4 %
of the volume of wate contained within the installation.
Water governor :
Dereve (Flow Controls) Lited
Park Lane
HANDSWORTH
(V) Expansion vessels must be fitted on the supply pipe bet-
ween the non-return valve, combinations of check valve, or
any equipment containing such dices, and the appliance.
PUTTING INTO SERVICE
Birmingham B 21 8LE 0121 5537 021
Shower Accessories :
Caradon Mira Ltd
Cromwell Road
Cheltenham
Gloucester GL52 5EP
Tel : [phone]
Barking Grohe :
1 River Road
Barking
Essex IGl 1 OHD
Tel : [phone]
Meynell Valves Ltd :
Shaw Road,
Bushbury,
Wolverhampton,
West Midlands WV1 09LB
Tel : [phone]
Aqualisa Products Ltd :
Horton’s Way
London Road
Westerham
Kent TN 16 1BT
Tel : [phone]
New Team Ltd :
Brunell Road
Earlstree Ind. Estate
Corby
Northants NN17 2 LF
Tel: [phone]
Remove protective f&n before use
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 external pipework connections. Fit
the gas control knob and light the pilot by turning the knob 90”
anti-clockwise. It may be necessary to purge the pilot gas sup-
ply, if so, wait a few moments, return the gas control knob to
the off position and repeat (the pilot supply will only purge when
the gas control knob has been turned 90” anti-clock-wise).
Turn the gas control knob fully anti-clockwise to the main gas
position. If the pilot is now extinguished for any reason, return
the gas control knob to the safety interlock to reset itself. Turn
on an adjacent water draw-off point, the heater will now light.
Check the burner pressure by fitting a suitable gauge to the pres-
sure 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 pres-
sure is not correct, check for any possible blockage or restriction
in the corrected contact your local gas region. The heat input to
the heater is preset and non-adjustable.
Do not use the heater with push-on hand showers that fit over
existing hot and cold water taps.
PIPEWWORR
The following notes are for general guidance only.
(I) The heatersperformance may be &e&d ifthe 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 wille
be in use.
Remove the gas control knob
Replace the front cover ensuring that the rubber spacer is in
place behind the centre fting strewn, slide facia plate down,
replace the gas control knob and temperature control knob
ensuring that the knob indidates <<hot,when turned fully clock-
wise.
Hand the User’s Instructions to the consumer and instruct in the
correct and safe operation of the heater.
DRAINING THE HEATER
(II) The size of pipework between the heater and the various If the heater
is not to be used for long periods it is recommen-
draw-off points should be sized to ensure an adequate flow ded that it be drained. See the Servicing Instructions for how to
at all draw-offs when used individually. drain the heater.
6

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servicing instructions
Before commencing any servicing work, turn off the gas and
water at the gas and water inlet taps on the appliance.
Slide the bottom plastic trim forward to improve access
ROUTINE SERVICING
To ensure continued efficient and safe operation of the applian-
ce it is recommended that it is checked and serviced as neces-
sary at regular intervals. The frequency of servicing will depend
upon the particular installation condition and usage, but in gene-
ral once a year should be adequate. It is the law that any servi-
ce work must be carried out by a competant person such as
Bristish Gas, other C.O.R.G.I. registered personnel or your local
Chaffoteaux Service Centre, in accordance with the Gas Safety
(Installation and Use) Regulations. This routine service will nor-
mally be confined to :
1) Cleaning the burner, and pilot tube.
2) Cleaning the heat exchanger, and thermocouple.
3) Checking the gas controls.
4) Cleaning water fdter, and water governor.
5) Chek diaphragm and replace every 3 years.
The following schedules are recommended :
a) Check the function of appliance, burner pressure, gas ffow
rate and soundness.
b) Observe flame picture and undertake combustion test.
c) Check, clean or replace components as necessary.
1) FRONT CASING
To remove, pull off the gas control and temperature control
knob.
Slide facia plate upward to allow access to centre fling screws.
Unscrew the top, centre and bottom f&g screws.
Pul off the case taking care not to lose the rubber spacer behind
the centre fting 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).
Pull burner head assembly forward to remove, taking care not
to trap the thermocouple or ignitor wires.
The burner head should be turned upside down and cleaned by
brushing.
Replace in reverse order making sure that the gasket between
the burner manifold and gas section is in place and that the bur-
ner 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 exchanger by
removing the clip and the two ftig screws. Lift the ffue bend
off the heat exchanger taking care not to damage the sealing
gasket. The heating body can be examined in position and if
external cleaning is sufficient, remove the burner and clean the
heat exchanger with a soft brush, detergent and the hot water.
To remove the heating body for further cleaning, the heater
must first be drained.
Turn off the water inlet tap to the appliance as before and open
an adjacent hot water draw-off point. Remove the drain plug
from the side of the water inlet tap (C - fig. 8) and drain the
water from the heater. Alternatively remove the water governor
plug (D - fig. 8) from the base of the water section and drain the
water governor plug before proceeding.
Remove the burner (see section 2).
Remove the screw holding the bottom of the heating bodyskirt
to the rear case.
Release the two union nuts on the heating body legs.
Remove the heating body.
In hard water areas it may be necessary to descale the heating
body. Use a solution consisting of 5 parts water to 1 part hydro-
chloric acid. The water should preferably be hot - ADD ACID TO
WATER, NOT WATER TO ACID.
Fii the heating body solution and leave until the solution stops
bubbling. Flush out the heating body thoroughly before refitting
to the heater.
WARNING - ACID/WATER SOLUTIONS MUST BE USED
WITH EXTREME CAUTION. TAKE CARE NOT TO SPLASH
THE SOLUTION ONTO SKIN OR INTO THE EYES. WASH
ANY AREAS AFFECTED WITH LARGE AMOUNTS OF COLD
WATER AND SEEK MEDICAL ADVICE.
Fig. 7 Fig. 8 Fig. 9
7

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servicing instructions
Re-assemble in reverse order ensuring that the skirt fixing screw
and reinforcing strip are in place.
4) PILOT
Unscrew the pilot tube clamping screw (A - Bg.7) and remo-
ve the clamp and tube.
Blow through the tube to remove any dust.’
Remove the burner (see section 2)
Unscrew the knurled pilot burner outer ring (E - fig. 9).
Lift off flame retention gauze.
Unscrew the pilot body (F - fig. 9) with a 15 mm spanner.
Clean by blowing or washing in water. Do not clean the holes
with a wire.
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 thermocouple nut (G - fig. 10) from the thermo-
electric valve and remove it from the wire.
With a 7 mm box panner, unscrew the nut (H - fig. 11) hol-
ding the termocouple into the gas section.
Thread the thermocouple and wire up through the gas sec-
tion.
Replace in reverse order.
6) SPARK ELECTRODE
Remove the burner (see section 2).
Remove the electrode fixing screw (I - fig. 11) with a screw-
driver placed inside the heating body skirt.
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 electrode cable is vertical when pushed
onto the cartridge.
7) THERMO-ELECTRIC VALVE
To replace, remove the thermocouple nut (G - fig. 10).
Unscrew cap from the side of the gas section and widthdraw
the then-no-electric valve.
NOTE : This heater is &ted with a safety interlock. When the
pilot is turned off, the heater can not be relit until the ther-
mocouple cools down and the lighting sequence is repeated.
8) MAIN GAS VALVE
To inspect and clean, remove the burner (see section 2).
Disconnect the thermocouple and ignitor lead (see section 5
and 6).
Remove the four screws fastening the top of the gas section
to the base (K - fig. 12) and the two screws at the back
(L - fig. 12), holding it to the rear case.
Lift the gas section top off the base.
Remove the complete gas valve assembly by unscrewing the
brass cylinder that two flats.
Dismantle the gas valve assembly by unscrewing the hexa-
gonal spring retainer from the top of the assembly. Remove
the spring and gas valve and clean the valve seating.
Replace the gas valve facing rubber and gas valve assembly
“0” ring if necessary.
Replace in reverse order, ensuring that the hexagonal spring
retaining nut is screwed fully down and the whole assembly
is screwed fully down into the gas section.
9) DIAPHRAGM
To replace, turn off the cold water supply and gas.
Drain the heater by removing the water governer plug situa-
ted in the base of the water section.
Unscrew the four water unions (M - fig. 13) on the water sec-
tion.
Unscrew the six screws (N - tig. 13) holding the water section
to the gas section.
Remove the water section complete with the diaphragm.
Replace in reverse order - NOTE - tit the water governor last.
It is easier if the cold water inlet connection is partially enga-
ged before iitting the screws and reconnecting the union
nuts.
10) WATER GOVERNOR
To clean, turn off the cold water supply to the heater.
Remove the governor situated in the base of the water sec-
tion (0 - fig. 14).
Clean the components with water.
Check that the spring loaded piston moves freely.
Replace in reverse order.
Fig. 10 Fig. 11 Fig. 12
a

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servicing instructions
11) GAS AND WATER FILTERS
Gas and water inlet are fitted bet-
ween 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.
Clean the filters by blowing or
washing in water. DO NOT use any
solvents.
Replace ensuring that the coarse fil-
ter is iitted in the water inlet and the
fine filter in the gas inlet.
12) PIE20 CARTRIDGE
Pull off the electrode from the piezo
cartridge.
Remove the screw holding the gas
control cam and remove the cam (P
- fig. 15).
Remove the two screws (Q - fig. 15)
holding the retaining plate.
Remove the piezo cartridge and
replace if necessary.
13) HEAT INPUT
The heat input is pre-set and non-
adjustable. The heat input and bur-
ner pressure should be checked
against Table 1.
If the heat input/burner pressure is
not correct, check the working pres-
sure at the pressure test point on
the gas service tap. This should be
20 mbar (8 ins w.g.).
The gas installation should be exa-
mined for any possible blockage if
the pressure is incorrect.
14) WATER SECTION VENTURI
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 order.
15) SLOW IGNITION DEVICE
Burner ignition should be smooth
and quiet. Incorrect adjustment of
the slow ignition screw can cause
explosive ignition or ignition at all.
To adjust the slow ignition device
firstly tighten screw (S - fig. 14) fully
then unscrew l/4 turn at a time until
the appliance ignites smoothly.
Note : Turning the screw (S) clock-
wise delays ignition.
16) GAS CONVERSION
From natural gas to brrtan-propan and
vice-versa (fig. 16, 17, 18).
- Turn off gas at the gas service cock and
remove the front casing (see section 1,
front casing, p. 7).
Fig. 13
- Unscrew the pilot tube clamping screw
(52) and remove pilot tube (8).
- Remove the burner manifold (7) by
unscrewing the four screws (53).
- Disconnect at thermo-electric valve by
undoing nut (54) and pull off the elec-
trode cable (55).
- Unscrew the two screws (56) and pull
burner forward to remove.
- Unscrew the four screws (57) and lift
the gas section top off the base.
- Unscrew the spring retainer (58).
- Remove spring (59) and change the
main gas valve (60).
- Replace the spring (59) and screw fully
down the spring retainer (58).
- Replace the gas section top on the
Fig. 14 base and screw the four screws (57).
- Replace the burner and screw the 2
screws (56).
Fig. 15
- Re-assemble the thermo-couple nut
(54) and electrode cable (55).
- Change the pilot gasket (61) change
the pilot injector.
- Replace the new burner manifold with
the appropriate injectors and the mani-
fold restrictor (if planned).
Fasten the four screws (53).
- Replace the pilot tube (8) conform with
the new used gas and gently tighten
the screw (52).
-“’ -__ __.. ,,., .,,. ,,.,......
_~“-..“..l--..-““..“l ..“L”z”-““A
Fig. 16 -~ ^^-zz - Fig. 17
Fig. 18
9

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FAULT FINDING CHART FOR BRITONY II T
PROBLEM
LOW WATER
TEMPERATURE
BUBNEB STAYS ON
YELLOW FLAMES
SOOT FORMED
UNSTABLE FLAMES
HEATING BODY
NOISE
INSUFFICIENT
WATER FLOW
CAUSE
I) Insufficient gas flow
II) Water governenor sticking
III) Incorrect venturi
IV) No venturi fitted
I) Air in pipework
II) Gas valve stays open
III) Venturi blocked
IV) Dirt on gas valve facing
V) Loose jumper on house stop cock tap
VI) Dirt foreign matter is water section
VII)Slow ignition device stuck
I) Heating body fins blocked
II) Primary air supply restricted
III) Wrong injectors
I) Water in gas line
II) Faulty flue
I) Scale
II) Excessive gas
III) Insufficient water ilow
I) Water service tap partly closed
II) Blocked venturi
III) Low water pressure
IV) Water governor faulty
V) Water governor sticking
VI) Foreign matter in water section
REMEDY
Check rate and user’s tap is open
Remove and clean or replace
Replace (3.65 mm)
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 jumpe
Clean water section
Clean and adjust (see page 4)
Remove heating body and clean
Check burner manifold and clean
Replace manifold
Purge
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
10

Supplied By www.heating spares.co Tel. [phone]
FAULT FINDING CHART FOR BRITONY II T
PROBLEM CAUSE REMEDY
PILOT FLAME I)
Gas service tap closed Open service tap
DOES NOT LIGHT II)
Air in pipe Purge line
III) Pilot injector blocked Clean or change
IV) No ignition spark Check electrode, lead and ignitor
POOR PILOT FLAME I) Pilot injector dirty/damaged Clean or change
II) Wrong injector change for correct diameter (seeTable 1)
III) Pilot head blocked Clean
IV) Faulty pilot tube Clean or replace
PILOT WILL NOT I) Thermocouple not working Change thermocouple
STAY ALIGHT II)
Thermo-electric valve faulty Change valve
III) Gas pressure low/variable Check at inlet to heater (see page 3)
IV) Terminal wrongly positioned Re-position heater (see page 4)
V) Badly assembled flue Refit-check sealing
VI) Gas pressure too hight Check with British Gas
MAIN BURNER I) Gas service tap not open fully Open fully
DOES NOT LIGHT II)
Gas pressure low Check at manifold and at inlet with heater
III) Water rate low Check if water rate is suficient (see page 3)
IV) Gas valve not opening Check (V) and (VI)
V) Diaphragm punctured Change diaphragm
VI) Venturi blocked or loose Check venturi
VII) Gas control tap faulty Check operation of User’s gas control tap
VIII) Wrong injector Check for correct diameter (see Table 1)
IX) Slow ignition device stuck or wrongly adjusted Clean or adjust (see page 9)
EXPLOSIVE I)
Pilot Check pilot tube and injector
IGNITION II)
Slow ignition device stuck or wrongly adjusted Clean or adjust (see page 9)
GAS CONTROL TAP I) Grease dried Clean and regrease
STIFF (USER’S) II)
Operating mechanism replaced incorrectly Refit
11

Supplied By www.heating spares.co Tel. [phone]
SHORT LIST
r------------------~
I
I
1001 :
I I
i lo”“-@ ;
165eg20
634
r-----------907-1
10-i
1ore
0 o/
p @/
---------------J
1043 1042 t
dA
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I
f
I
I
1006-O ;
10364 i
I
.---------------------~
Key
Description Type G. C. NO. MANF.m. NO.
BRITONY IIT
165 FOAM SEAL 25x12 L: 1,030M ................................... 366032 26773.00
502 THERMOCOUPLE .................................................... 387251 35087.00
503 ELECTRODE AND LEAD ASSEMBLY.. ...................... 387252 60703.00
634 DIAPHRAGM ........................................................... 263432 25809.30 8
902 GAS CONTROL KNOB 264487 74469.00 [r
............................................. 8
905 TEMPERATURE SELECTOR KNOB.. 264488 74470.00 a
......................... 8
907 FRONT CASE TRIMS.. ............................................. 264888 81172.00 z
a
920 BOlTOM TRIM ........................................................ 264490 74473.00
1001 GAS SERVICE TAP ASSEMBLY.. .............................. NAT 265158 81288.00
1006 OLIVE ..................................................................... 263800 56489.00
IO18 WATER SERVICE TAP ASSEMBLY.. .......................... 263794 81289.00
IO19 WATER FILTER.. ...................................................... 263589 1007727.00 ij
a
I031 FIXING ASSEMBLY.. ................................................ 265160 81404.00 iz
‘;
IO36 NUT l/2”. ................................................................. 263801 56490.00 i
IO38 GAS FILTER ............................................................ 263545 37309.00 s
2
1042 DRAIN PLUG.. ....................................................... 263617 41197.00 r
ti
IO43 “0” RING D: 7.2-l .9 .................................................. 262806 24164.12 E
Chaffoteaux et Mauty Limited,
Trench Lock, Trench, Telford, Shropshire TFl 4SZ
Telephone : Telford [phone] - Telefax’: [phone]
Looking Good. Heating Better
ESP03-l