Britony Combi 80 User manual

Combi 80
COMBINATION BOILER
Heating and Instantaneous Domestic Hot
Water
Fanned Flue system
Installation and
Operating instructions
--
Combi 100

These instructions are suitable for the following boilers :
Britony Combi 80
Britony Combi 100

CUSTOMER CARE
Chaffoteaux et Maury Ltd., as a leadrng manufacturer of domestrc and commercral water heatrng applrances, IS committed to provrdrng hrgh qualrty products and a
hrgh qualrty after sales servrce If it IS necessary to contact an engrneer, then telephone your local Chaffoteaux Service Centre. The number can be obtarned from
the leaflet enclosed rn the customer care pack wrth your boiler or by telephonrng the Chaffoteaux Customer Servrces Department at Telford.
Advrce on rnstallatron or servrcrng can also be obtarned by contactrng the Chaffoteaux Customer Servrces Department at Telford.
CUSTOMER SERVICES DEPARTMEN
Tel: [phone]
Fax. [phone]
GUARANTEE
The manufacturer‘s guarantee IS for 12 months from the date of purchase. The guarantee is voidable d the appliance IS not Installed rn accordance with the
recommendatrons made herern or rn a manner not approved by the manufacturer. To assrst us rn provrding you with an effrcrent after sales servrce, please return the
guarantee regrstration card enclosed wrth the borler wrthout delay
STATUTORY REQUIREMENTS
The rnstallatron of thus applrance must be carned out by a CORGI Regrstered person or other competent person and in accordance with the requrrements of the Gas
Safety (Installatron and Use) Regulatrons.
In addrtron, the rnstallatron must also comply wrth the current byelaws of Local Water Undertakrngs, Burldrng Regulatrons, IEE Winng Regulatrons, Local Authority
Burldrng Standards (Scotland) Regulatrons and the Safety Document 635 The Electncrty at work Regulatron.
It should also be carned out rn accordance with current edrtrons of the followrng Brrtrsh Standards Codes of practrce: BS 6891, BS 5440 parts 1 and 2, BS 5449 part
1, BS 7593, BS 6798, BS 5546, BS 4814, BS 7074 part 1 and 2, BS 7671 and BG DM2.
If there IS a possrbrlity of the Incoming marns water pressure exceedrng 10 bar then a surtable pressure lrmrtrng valve must be frtted
To comply wrth the Control of Substances Harmful to Health Regulatron 1988 we are requrred to provrde rnformatron on the following substance that IS contarned
wrthrn the applrance Descrrptron: Combustron Chamber Lrnrng
Material: Alumrno SIrcone Fibre
Precautions. Dunng servrcrng, keep the dust generation to a mrnrmum and avoid Inhaling any dust and contact with the skrn and eyes. Normal handlrng and use wrll
not present any drscomfort, although some people wrth a hrstory of skin complarnts may be susceptible to rrntatron. When disposing of the Irmng, ensure that rt IS
securely wrapped and wash hands after contact.

Page
CUSTOMER CARE ............
Guarantee ....................
Statutory Requirements .........
Contents .....................
INTRODUCTION ..............
DESCRIPTION ................
Location of components .........
TECHNICAL DATA .............
DIMENSIONS .................
OPERATION ..................
Domestic Hot Water Mode .......
Central Heating Mode ...........
INSTALLATION REQUIREMENTS
Location .....................
Flue .........................
Ventilation ....................
Gas Supply ...................
Electrical Supply ...............
SYSTEM GUIDANCE ...........
Showers .....................
Flushing and Water Treatment ....
System Controls ...............
Bypassand pump ..............
Expansion Vessel ..............
Filling Point ...................
..
.. .. ..
..
..
3
3
3
5
6
6
8
10
12
12
12
14
14
14
15
15
15
16
16
16
16
17
18
18
INSTALLING THE BOILER .....
Installation ...................
Fitting the horizontal flue ........
Making the electrical connections
COMMISSIONING AND TESTING
Pre-commissioning ............
Domestic Hot Water ...........
Central Heating ...............
Lighting the boiler .............
Post Commissioning ...........
Handing over to the Householder ........
USER’S INSTRUCTIONS .............
Control panel .......................
Isolating taps ........................
Switching on ........................
Hot water ..........................
Heating and hot water .................
Turn off the boiler ....................
INSTRUCTION FOR SETTING THE BUILT
IN CLOCK ..........................
Mechanical programer ................
Electronic programer .................
19
19
20
22
24
24
24
24
24
25
25
26
26
26
27
27
27
27
28
28
29

The BRITONY COMBI is a fully automatic, wall mounted, low water content combination boiler. It is a room sealed,
fan assisted, balanced flued appliance providing central heating and mains pressure domestic hot water on
demand. It has electronic ignition and is suitable for all modern electrical control systems. The boiler is designed
for sealed systems only and a circulating pump, expansion vessel together with a pressure gauge and safety valve
are included within the boiler.
The standard horizontal flue kit is suitable for lengths 300 mm minimum to 610 mm maximum and includes an
elbow adapter that can be rotated through 360”. The horizontal flue can extend up to 3 metres using 1 metre flue
extension kits. 45” and 90” flue bends are also available as accessories.
The BRITONY
available. COMBI is also suitable for concentric vertical flueing and twin pipes. Adapters and accessoiries are
The boiler is packed in two cartons:
1. the boiler
2. the flue assembly and the pre installation kit

Location of components
1. Air pressure switch
2. Steel chassis complete with expansion vessel
3. Main heat exchanger
4. Combustion chamber
5. Multi- gas burner assembly comprising ignition and
ionisation electrodes
6. Automatic air separator and automatic vent
7. Heating circuit flow switch
8. Pump
9. Electrical box
10. DHW circuit flow switch
11. Overheat thermostat
12. Gas valve assembly
13. Sealed chamber
14. Flue hood with fan
15. Hot water control thermistor
16. Central heating control thermistor
17. Three way valve
18. CH Flow isolating valve
19. Three position Selector switch
20. User’s instruction panel.
21. Heating flow temperature adjustment
22. Green indicator - Power ON

16 - \ 21 22 i6
Fig. 3 20
23. Orange indicator - Burner ON
24. Red indicator - Lock out / fiame failure
25 Reset button
26. Pressure gauge
27.Gas service tap
28. Water service tap
31. Secondary heat exchanger
32. By pass
33. By pass adjustment screw
29. CH Return isolating valve
30. Pressure relief valve

Britony combi type
Appliance category . . . . . . . . . .
80 100 Britony combi type 80 100
cat II 2H 3+ cat II 2H 3+
Natural gas G20
C/H circuit pressures
Min operating in bar
in lb/in2
Max operating in bar
in lb/in*
DHW flow rates
0.7 0.7
10 10
2.5 2.5
36.3 36.3
@30”CinI/min . . . . . . . . . . . 11.1 13.4
in gal/min . 2.45 2.95
@ 35°C in I/min 9.54 11.48
in gal/min 2.10 2.53
DHW circuit pressures
Min operating in bar 0.1 0.1
in lb/in2 1.45 1.45
Max operating in bar 10 10
in lb/in* 145 145
Flow limitor rate in Vmin 10 12
Gas rate
Maximum in m3/h 2.74
Maximum in ft3/h 97
Inlet pressure
3.34
118
Nominal in mbar . . 20 20
Nominal in in wg . . . 8 8
Burner pressure
Nominal in mbar . 11 12.8
Nominal in in wg . . 4.4 5.12
Burner injector diamater
Natural gas G20 in mm . 1.23 1.26
PROPANE L.P.G. G31
Gas rate
Maximum in kg/h . . 2.00
Maximum in ft3/h . . 4.41
Inlet pressure
Nominal in mbar 37
Nominal in in wg . 14.8
Burner pressure
Nominal in mbar 35
Nominal in in wg . . 14
2.42
5.34
37
14.8
30.4
12.16

Britony combi type 80 100 Britony combi type 80 100
BUTANE L.P.G. G30 Safety discharge
Gas rate in bar . . . . . 3 3
Maximum in kg/h 2.04 2.45 in lb/in*. . . . . . . 43.5 43.5
Maximum in Lbs/h . 4.50 5.40 Expansion vessel
Inlet pressure Pre-charge pressure in bar 0.7 0.7
Nominal in mbar . 28 28 Pre-charge pressure in lb/in* 9.4 9.4
Nominal in in wg . 11.2 11.2 Net capacity at 3 bar in liter 5.44 5.44
Burner pressure Adjustable by-pass
Nominal in mbar 26,7 24 Minimum flow rate in I/h 100 100
Nominal in in wg IO,7 9.6 Minimum flow rate in gal/min 0.36 0.36
Maximum flow rate in I/h 700 700
Burner injector diamater Maximum flow rate in gal/min 2.56 2.56
LPG G30 and G31 in mm 0.72 0.76
Burner injector diamater Electrical characteristics
LPG G30 and G31 in mm 0.72 0.76 Supply . 230~ 50 Hz
Consumption 150w 150w
Compartment ventilation not required Protection . IP 44 IP44
Fuse+1 . . 2A 2A
Fusen”2 . . 1.25A 1.25A
External controls 24v 24v

Outer case dimensions :
- W&h : 440 (mnmum space required 450)
- Height :
-Depth: . iii
Without packaging :
Tails diameter
~1
Safety valve outlet 015mm
J Heating flow 022mm
K D.H.W. flow 015mm
L Gas supply 022mm
M Cold water inlet 015mm
N Heating return 022mm
Safety valve axe
Fig. 4
q
I

Minimum clearances :
- Both sides 5mm
- Above casing 170 mm
- Below casing 200 mm
- Front (for servicing) 500 mm
- Front (in operation) 5 mm
TYPE Cl2 or C42
Fig. 5 Sizes in mm
The boiler is suitable for the 3 flue types :
l typeC12 C22orC42
l type C 32 xx or C 32 xy
TYPE C32 xx TYPE C32 xy

Domestic Hot Water Mode
To be able to supply hot water, the selector switch 19 Fig. 6
must be in either on k or ‘1111.? position. This will be
confirmed by the green indicator light 0 22 Fig. 6
When a tap or shower is turned on, the flow of mains water,
above 2 litres per min., will activate the DHW flow switch 10
Fig 7 and allow the 3 way valve 17 Fig. 7 to move to the
DHW position. The pump can now circulate primary water
heated by the main heat exchanger through the secondary
heat exchanger.
The first stage solenoid 12a Fig. 7 and safety solenoid 12c
Fig. 7 open together to allow gas to the burner. The ignition
sequence begins and a continuous high speed spark ignites
the gas. As soon as a flame is detected the orange indicator
bulb 0 23 Fig. 6 will light and the second stage solenoid 12b
Fig. 7 opens to allow the full gas rate. If a flame is not
detected, after 8 seconds, the security solenoid closes and
shuts off the gas. The red lockout indicator bulb a 24 Fig. 6
will light, The domestic hot water temperature is controlled
by the hot water control thermistor 15 Fig. 7 and the central
heating control thermistor 16 Fig. 7. This system anticipates
the changes of temperature in the secondary heat exchanger
16
-\ $1 22 26
Fig. 6 20
and ensures accurate temperature regulation
When the tap is closed the burner is extinguished and the pump
stops. The boiler will now stay in the hot water mode for three
minutes to maintain temperature to ensure a fast response in the
event of a subsequent hot water demand.
Priority will be given to a demand for hot water. This will interrupt
the central heating for the duration of hot water delivery.
Central Heating Mode
To be able to supply hot water, the selector switch 19 Fig. 6
must be in either on .e or ‘Ill1 FF position. This will be
confirmed by the green indicator light 0 22 Fig. 6

When there is a demand for heating (either from the room
thermostat or the clock) and the boiler temperature control is
calling for heat. The pump starts and at a flow rate of 4 Itr/min
the central heating flow switch operates allowing the ignition
sequence to begin. The first stage solenoid 12a Fig. 7 and
safety solenoid 12c Fig. 7 open together to allow gas to the
burner. The ignition sequence begins and a continuous high
speed spark ignites the gas. As soon as a flame is detected the
orange indicator bulb b 23 Fig. 6 will light. After 45 seconds the
second stage solenoid 12b Fig. 7 opens to allow the full gas
rate. If a flame is not detected, after 8 seconds, the security
solenoid closes and shuts off the gas. The red lockout indicator
bulb * 24 Fig. 6 will light.
The central heating flow temperature is controlled by the
central heating control thermistor 16 Fig. 7. The boiler has been
designed to minimise cycling and will not attempt to relight for at
least 3 minutes after the boiler thermostat has been satisfied.
When the room thermostat is satisfied the burner will switch off
and the pump will remain running for a further 3 minutes before
it to stops.
NB
It is possible to override the 3 minute delay by pressing the
RESET button 25 Fig. 6.

Location
The boiler can be installed on any suitable internal wall.
Provision must be made to allow the correct routing of the
flue and siting of the terminal to allow the safe and efficient
removal of the flue products. The appliance may be
installed in any room, although reference must be made to
the IEE regulations if it contains a bath or shower. A
compartment or cupboard may be used provided that it has
been purpose-built or modified for the purpose. Provision
must be made for permanent ventilation. Detailed
recommendations are given in BS 5440 pt 2. If it is
proposed that it is installed in a timber framed building then
reference must be made to British Gas Document DM2, or
advice sought from CORGI.
Flue
The boiler must be installed so that the flue terminal is
exposed to the free passage of external air at all times. It
must not be allowed to discharge into another room or
space such as an outhouse or closed lean-to. The
minimum acceptable clearances are shown below:
- A Directly below an opening, window, etc 300 mm
- B Below gutters soils pipes or drain pipes 75 mm
- C Below eaves 200mm
- D Below balconies or car port roof
- E From a vertical drain pipe or soil pipe
- F From an internal or external corner 300 mm
- G Above ground roof or balcony level 300 mm
- H From a surface facing the terminal 600 mm
- I From another terminal facing the terminal 600 mm
-J From an opening into the dwelling when
under a car port 1200 mm
- K Vertically from a terminal on the same wall 1500 mm
- L Horizontally from a terminal on the same wall 300 mm
- M fixed by the flat roof ubbink rolux 4GM flue terminal
- N fixed by a pithed roof ubbink rolux 4GM flue terminal
200 mm
75 mm

It may be necessary to protect the terminal with a guard if it is
accessible and could be damaged. Reference should be made to
the Building Regulations for guidance. Suitable guards may be
obtained from the following maufacturer:
Quinnel Barret & Quinnel Wireworks
Old Kent Road
London SE15 1NL
Tel: [phone]
Ventilation
The room in which the boiler is installed does not require specific
ventilation. IF IT IS INSTALLED IN A CUPBOARD OR
COMPARTMENT PERMANENT VENTILATION IS NOT
REQUIRED FOR COOLING PURPOSES. If vents are installed,
they must communicate with the same room or be on the same
wall to outside air.
outside air.
Gas Supply
The gas installation and soundness testing must be in
accordance with the requirements of BS 6891.The boiler
requires: 2.74 m3/hr and a 22 mm supply. Ensure that the pipe
size is adequate for the demand including other gas
appliances on the same supply.
Electrical Supply
The appliance requires an earthed 230V - 50 Hz supply and
must be in accordance with current I.E.E. It must also be
possible to be able to completely isolate the appliance
electrically. Connection should be via a 3 amp fused double-
pole isolating switch with contact separation of at least 3 mm
on both poles. Alternatively, a fused 3 Amp. 3 pin plug and
unswitched socket may be used, provided it is not used in a
room containing a bath or shower. It should only supply the
appliance.

The boiler is suitable for sealed systems only. The maximum
working pressure for the appliance is 10 bar. All fittings and
pipework connected to the appliance should be of the same
standard. If there is a possibility of the incoming mains
pressure exceeding 10 bar, particularly at night, then a
suitable pressure limiting valve must be fitted.
The boiler is designed to provide hot water on demand to
multiple outlets within the property. If there is a requirement
for greater demands, for example if the property has several
bathrooms and cloakrooms, a vented or unvented hot water
storage system may be used.
Showers
Any shower valves used with the appliance should be of a
thermostatic or pressure balanced type. Refer to the shower
manufacturer for performance guidance and suitability.
guidance. For more information on the use of corrosion
inhibitors, flushing and descaling agents, advice can be
sought from the manufacturers of water treatment products
such as: Betz Dearbon Ltd
Foundry Lane
Widnes
Cheshire
WA8 8UD
Tel: [phone]
Fernox Manufacturing
Britannica Works
Clavering
Essex
CBll 4QZ
Tel: [phone]
System Controls
Flushing and Water Treatment
The performance of the appliance could be impaired by
system debris or the effects of corrosion. The system must be
flushed thoroughly to remove metal filings, solder, machining
oils and other fluxes and greases before connecting the
boiler. If it is an existing system, an appropriate flushing and
descaling agent should be used. Refer to BS 7593 (1992) for
The boiler is electrically controlled and is suitable for most
modern electronic time and temperature controls. The
addition of such external controls can be beneficial to the
efficient operation of the system. The boiler connections for
external controls are 24V and so only controls of 24V or that
have voltage free contacts should be used.

By pass and Pump
The boiler is fitted with a pre-adjusted by pass. Although adjustment is not normally necessary, the by pass can be reset by
turning screw ( D Fig. 9 ) anticlockwise to open the by-pass using the chart below for guidance.
If used on a system with thermostatic radiator valves, the flow rate with the thermostatic valves closed should be adjusted to
at least 100 I/hr.The chart below indicates the residual head of the pump available for the system.
D
Head and flow rate available
m Hz0 I<- MInImum flow rate
5
4
3
2
1
0
0 100 200 300 400 600 600 700 800 90010001100I/h
Fig. 10

Expansion Vessel Filling Point
The expansion vessel is pre-charged to 0.7 bar (10 lb/in*). Provision must be made to be able to charge the system on
The vessel is suitable for systems up to 145 litres capacity. commissioning and to make up any subsequent pressure loss.
For systems of greater capacity an additional expansion The method of connection must utilise approved equipment
vessel will be required. Refer to the chart below and BS 7074 and must comply with the water regulations. A filling loop can
pt 1 or BS 5449. be so installed as to be hidden beneath the boiler.
Pressure ’
System capacity chart
80 100
120 140 180 180 200 220 240 260 Litres
Fig. 11 Fig. 12

Please check that you are familiar with the installation
requirements before commencing work.(section 6)
Installation
The installation kit included with the flue components
comprise following items :
- Hanging bracket
- A paper template (showing the dimensions of the boiler with
5 mm side clearances, fitting instructions and commissioning
instructions)
- Connection tails
- Screws and wall plugs
- Connection washers and filters
- Pre-piping jig
- Installation manual
Method of positionning the boiler on the wall.
The paper template can be used to ensure the correct
positioning of kitchen cabinets etc. It also details the
commissioning instructions.
The paper template has to be fixed to the wall and used to fix
the position of the hanging bracket, the centre for the flue
hole and, if required, the fixings for the pre-piping jig.
Drill and plug the wall and secure the hanging bracket using
the screws provided. Remove the boiler from its packaging as
shown in Fig. 13 and remove the outer case as shown in
Fig.14. Place the boiler on the wall on the hanging bracket.
If required, there is space for all piping to pass behind the
Fig. 13
Fig. 14

-
--
boiler. Using Fig. 15 for reference, connect the gas and water
pipes to the valves located at the base of the appliance using
the tails provided. There is a 190 mm space between the
valves and the wall to make these connections.
Provision must be made to fill and recharge the system
Fig. 15
Safety valve outlet
Heating flow 015mm 022mm
pressure. This can be achieved using a filling loop or other
methods approved by the local water authority.
The pressure relief should terminate below the boiler over a
tundish or 22 mm pipe (see I fig 15) which should in turn
discharge safely outside the premises. Care should be taken
that it does not terminate over an entrance or window or
where a discharge of heated water could endanger occupants
or passers by.
The system should be carefully checked for leaks, as frequent
refilling could cause premature system corrosion or
unnecessary scaling of the heat exchanger.
Fitting the Horizontal Flue
The instructions for the vertical and biflux (twin pipe) flue
options are included with the relevant adaptor kits.
The standard flue supplied with the appliance is suitable for
lengths from 300 mm minimum to 610 mm maximum. This
means for rear flueing, the standard kit will accommodate a
maximum wall thickness of 490 mm, and for side flueing a
maximum wall thickness of 477 mm. This takes into account
the minimum appliance side clearances of 5 mm.
K D.H.W. flow 015mm If the fixing is a rear exit flue, the template provides the
L Gas supply 022mm position of the centre for drilling the flue hole with a core drill.
M Cold water inlet 015mm If the flue is a side exit installation then calculate the position
of the hole with a slope of 5 mm / metre to the outlet.
N Heating return 022mm