C&M Britony FlexiFlu User guide

Britony FlexiFlue
Room Sealed Balanced Flue
MULTI POINT WATER HEATER
GGAASSSSAAFFEETTYY((IINNSSTTAALLLLAATTIIOONNAANNDDUUSSEE))RREEGGUULLAATTIIOONNSS..
It is the law that all gas appliances are installed by a competant person
in accordance with the above regulations.
Nat G.C. N° 52 980 08
LPG G.C. N° 52 980 10
from serial number 894216759-04
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The model number and serial number of this heater are on the data badge which is found inside rear
case at lower left hand side.
These numbers should be used when ordering replacement parts.
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2
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The Britony FlexiFlue is a room sealed, fanned balanced flue, multipoint water heater. The flue which is
100 mm (4”) diameter pipe, can be directed to the rear or to either side. The maximum recommended flue
length is 3 metres for straight application and 1,6 metres total when using a bend.
The appliance is for connection to a mains cold water supply having a minimum working pressure of 1 bar.
A permanent electrical connection is required and should be provided by use of a fused spur. The external
electrical supply should be via a double pole switch having 3 mm. contact separation in both poles. If the
appliance is installed in a bathroom the fused spur must be external to the bathroom.
When on pilot only the fan runs at “low speed” increasing to normal speed when there is a demand for hot
water. Included is a pressure switch, which operates if the fan stalls or if the flues is obstructed and a low tem-
perature sensor which will turn off the fan when the appliance is running on pilot only (fan low speed) in the
event of low air temperatures likely to cause freezing in the appliance.
NNoottee::Gas Safety Installation and Use Reg 1984. It is the law that all gas appliances are installed by C.O.R.G.I
registered persons in accordande with the above regulations. Failure to install appliances correctly could lead
to prosecution. It is in your own interest and that of safety to ensure compliance with the law.
11..11GGuuaarraanntteeee
The guarantee on this appliance is void if it is not installed in accordance with the recommendations made
herein or in a manner approved by the manufacturer.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
S
T
V
W
X
mm
655
395
270
100
40
385
438
775
728
53
55
98
70
285
105
199
290
95
870
ins.
25.78
15.5
10.6
4.0
1.6
15.15
17.25
30.45
28.6
2.1
2.15
3.8
2.75
11.22
4.13
7.8
11.4
3.73
34.22
11..22DDiimmeennssiioonnss
A
F
W
G
J
K
H
X
V
B
T
P
M
L
S
cable entry
C
N
ED Ø
WATER
OUTLET
GAS WATER
INTLET

3
11..33TTeecchhnniiccaallDDaattaa
Heat input nomimal .......................................... 25,2 kW 85966 Btu/h
Heat output nominal ......................................... 22,7 kW 77452 Btu/h
Gas rate (maximum) :
. Natural gas (G20) 35,9 MJ/m3- 20 mbar ..... 2,67 m3/h 94,29 ft3/h
with manifold restrictor ................................. 6,1 mm diam.
. Butane (G30) 45,6 MJ/Kg - 28-30 mbar...... 1,99 kg/h
. Propane (G31) 46,4 MJ/Kg - 37 mbar ......... 1,96 kg/h
Main burner injectors :
. G20 .............................................................. 1,28 mm diam.
. G30 - G31..................................................... 0,74 mm diam.
Pilot injector marking G20................................. 26
G30 - G31....................... 15
Water flow rate - raised 50°C (90°F) ................. 3,2 to 6,5 l/min 0,7 to 1,43 gpm
Water flow rate - raised 25°C (45°F) ................. 6,5 to 13 l/min 1,43 to 2,8 gpm
Min. water pressure selector closed .................. 0,5 bar 16,5 ft (7,5 psi)
Min. water pressure selector open .................... 1,0 bar 33,0 ft (15 psi)
Max. water pressure ......................................... 10 bar 150 psi.
Electrical supply ............................................... 240 V - 50 Hz
fused 3 A
The minimum water pressure is for the correct operation of the appliance only. An additional allowance
must be made for the resistance of pipework and fittings particularly where showers and washing
machines are used. This should be equivalent to 2 m. (6,5 ft) head.
Water inlet (Compression type fittings) .............. Right hand connection 15 mm Copper
Water outlet (Compression type fittings) ............ Left hand connection 15 mm Copper
Gas (Compression type fittings) ........................ Centre connection 15 mm Copper
Height (including flue bend) .............................. 778 mm 30,6 in
Width ................................................................ 395 mm 15,5 in
Depth................................................................ 270 mm 10,6 in
Weight - Cartoned ............................................. 24,3 kg. 53,6 lbs.
Weight - Lift....................................................... 15 kg. 33,1 lbs.
Minimum clearances - top (above flue)............. 50 mm 2 in
- bottom (below case) ..... 178 mm 7 in
- sides.............................. 25 mm 1 in
- front .............................. 600 mm 24 in
Hole for the air inlet duct .................................. 102 mm diam. 4,2 in. diam.
The Britony FlexiFlue is supplied in one carton.
Compartment ventilation not required.

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22..IINNSSTTAALLLLAATTIIOONNRREEQQUUIIRREEMMEENNTTSS
22..11RReellaatteeddDDooccuummeennttss
The installation of the heater must be in accordance
with the relevant requirements of the Gas Safety
(Installation and Use) Regulations. Building
Regulations and the current Byelaws of the local
water undertaking. It should be in accordance with
the current British Standard Codes of Practices Local
Authority Building standard (Scotland) regulations,
and the safety document 635, the electricity at work
regulation. Detailed recommendations are contained
in the following British Standard Codes of Practice :
BS 6400 : BS 5546 : BS 5440 : Pt. 1 : and Pt2 : BS 7671 - BS OM2.
22..22LLooccaattiioonn
The location chosen for the appliance must permit
the provision of a satisfactory flue termination The
location must also permit adequate space for servi-
cing and air circulation around the appliance.
The appliance may be installed in any room or inter-
nal space although particular attention is drawn to
the requirements of the current BS 7671 and, in
Scotland, the electrical provisions of the Building
Standards applicable in Scotland, with respect to the
installation of a heater i a room or internal space
containing a bath or shower.
Where a room sealed appliance is installed in a
room containing a bath or shower, any electrical
switch or appliance control, utilising mains electrici-
ty should be so situated that is cannot be touched by
a person using the bath or shower.
Where the installation of the appliance will be in an
unusual location special procedures may be neces-
sary and BS 5546 gives detailed guidance on this
aspect.
22..33GGaassSSuuppppllyy
An adequately sized gas meter must be connected
to the service pipe. Where necessary the local Gas
Region of British Gas will arrange for the existing
meter to be checked or for a suitable meter to be
installed. On no account must any work be carried
out on the gas meter other than by BRITISH GAS or
their specifically authorised contractor.
Installation pipes should be fitted in accordance with
BS 6891. Pipework from the meter must be of ade-
quate size. Pipes of a smaller size than the gas
connection should not be used. Gas supply pipes in
excess of 3 metres use 22 mm pipe.
The complete installation must be tested for gas
soundness and purged in accordance with BS 6891.
22..44SSiittiinnggtthheeFFlluueeTTeerrmmiinnaall
The flue must be installed in accordance with
BS 5440 : Pt. 1.
The following notes are intended to give general gui-
dance.
The standard flue set is suitable for walls having a
thickness of 75 mm (3 in.) to 612,5 mm (24 in.) for
rear outlet fluing or up to 500 mm (19,5 in.) for side
outlet fluing. Other flue options are available to a
maximum of 3 m (9 ft. 8 in.) to special order.
The appliance must be installed so that the flue ter-
minal exposed to external air. The appliance must
NOT be installed so that the terminal discharges into
another room space such as an outhouse or lean-to.
It is important that the position of the terminal
allows a free passage of an across it all times.
The minimum acceptable spacings from the termi-
nal to obstructions and ventilation openings are spe-
cified in the following chart. Also see Section 3.4.
T
Te er rm mi in na al lp po os si it ti io on ns sM Mi in nc cl le ea ar ra an nc ce es s
A Directly below an opening, windows etc
or adjacent to an opening 300 mm
B Below gutters soil pipes or drain pipes 75 mm
C Below eaves 200 mm*
DBelow balconies or car port roof 200 mm*
E From a vertical drain pipe or soil pipe 75 mm
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
J From an opening in the car port
(e.g. door or window) into dwelling 1200 mm
K Vertically from a terminal on the same
wall 1500 mm
L Horizontally from a terminal on the
same wall
* (107 mm) minimum clearance using kit N° 76216.00 (G.C. 264 833)
NNoottee--Where the terminal is fitted within 850 mm
(34 in.) of a plastic or painted gutter or 450 mm
(180 in.) of painted eaves an aluminium shield of at
least 750 mm (30 in.) long should be fitted to the
underside of the gutter or painted surface.
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 wall in which the terminal is situa-
ted must be protected by a guard of durable mate-
rial (a terminal guard is available from Quinnel
Barrett & Quinnel. 0171 639.1357 (GC No 381.
782)
The air inlet/products outlet duct and the terminal of
the appliance must not be closer than 25 mm (1 in.)
to any combustible material. Detailed recommenda-
tions on the protection of combustible material are
given in BS 5440 Pt. 1.
IIMMPPOORRTTAANNTTNNOOTTIICCEE::TIMBER FRAMED
HOUSES. If the appliance is to be fitted in a timber
framed building it should be fitted in accordance
with the British Gas publication «Guide for Gas
Installations in Timber Framed Housing» reference
DM2. If in doubt advice must be sought from British
Gas.
22..55WWaallllMMoouunnttiinngg
The appliance should be installed on a flat non-com-
bustible material which not reverberate. What ever
the thickness of the wall a hole 107 mm (4.2 in.) in
diameter will be required for the appliance flue
assembly. It is recommended that a core drill be
used to form this hole.
For dimensions are clearances see sections 1.2 and 1.3.

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22..66FFlluueeTTeerrmmiinnaallAAsssseemmbbllyy
The flue may be fitted from inside or outside of the
building. If fitting from inside the flue duct should be
assembled into the air intlet duct and the assembly
passed trough the hole in the wall. The outside dia-
meter of the terminal is the same as outside diame-
ter of the air inlet duct.
22..77AAiirrssuuppppllyy
The appliance does not require any purpose provi-
ded ventilation.
22..88EElleeccttrriiccaallCCoonnnneeccttiioonnss
The appliances must be earthed.
The installation should be undertaken by a compe-
tent electrician and should be in accordance with the
current edition of B.S 7671.
Particular attention should be paid to cross bonding.
The appliance must be provided with a means of
isolation. If installed in a bathroom the means of iso-
lation must be external to the bathroom or a double
pole cord switch fitted.
Acceptable methods of connection are :
1. A switched, double pole fused spur with 3 mm
contact separation on all poles.
2. A double pole switch where the supply must be
suitably fused 3 A.
3. An un-switched socket outlet compling with
BS 1363.
The method of connecting the plug brown wire to
live (L) blue wire to neutral (N) and green/yellow
to earth ( ), see fig. 3.
A three core cable should be used and a heat resis-
ting cable of 0.75 mm2(24 x 0,2 mm) is considered
suitable.
The cable should be passed through the gland on
the top of appliance and the clamp tightened to
secure the cable. Ensure current carrying conductors
become taught before earthing conductor should
cable slip from the cord anchorage. Connection to
the appliance should be made in accordance with
diagram (see section 3, 8, 2).
22..99DDeessccrriippttiioonnooffOOppeerraattiioonn
Read in conjunction with figs 1, 2 and 4).
The controls on the Britony FlexiFlue comprise of a
range of thermal, electric and electronic switches.
Broadly, the thermal controls are for the pilot flame
supervision, the electrical controls are functional
switching and the electronic controls act as a securi-
ty for the functional controls.
The circuit is designed so that, under normal condi-
tions, the fan runs continuously at low speed and
automatically changes to high speed when the gas
valve opens. If, however, the incoming air tempera-
ture approaches 0°C the integral frost protection
thermostat interrupts the low fan speed signal.
Under this condition, if there is a demand for hot
water, then the fan recommences at high speed.
There is an in-built delay circuit to prevent the safe-
ty devices operating prematurely.
The pilot can only be established under the control
of the thermocouple flame failure circuit after the
mains electricity connection is made since it is
dependent upon the energising of relay-RL1.
If the air flow is not proved on high speed the flame
supervision device will operate by interrupting the ther-
mocouple as a result of the de-energising relay-RL1.
ELECTRIC SUPPLY
FROST
THERMOSTAT FAN PRESSURE
SWITCH
MICRO SWITCH RELAY
RL2
RELAY
RL1
GAS VALVE
THERMOCOUPLE
THERMO
ELECTRIC
VALVE
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