C&M MX2 24 Nat, MX2 30 Nat Installation And Operating Instructions Manual
c
COMBINATION BOILER
Heating and Instantaneous Domestic Hot Water
Fanned Flue system
Installation and Operating instructions
Manufactures N° Model Type Gas Council N°
200906827037.31 MX2 24 Nat 47 - 980 - 28
200906828037.31 MX2 30 Nat 47 - 980 - 29
GB
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
2
These instructions are suitable for the NC boilers :
Do not forget the Logbook!
Chaffoteaux & Maury supports Benchmark, the heating industry code to ensure the correct installation, commissioning and
servicing of domestic central heating systems.
To The Householder
Make sure you have a completed Logbook for your boiler. This provides a record of the commissioning of your boiler.
It contains important information about your particular installation that may be required by service engineers. The logbook will
also provide contact details for the installer should you need guidance in the use of this appliance or if there are any problems.
As with your car, your boiler will work more reliably and efficiently if regularly serviced. We recommend an annual service
check. The service history of the appliance will be recorded on the logbook.
In the unlikely event of any problems with your boiler or system you should first contact your installer. If your installer cannot
resolve the problem he should telephone our national service helpline.
A charge may be made if Chaffoteaux & Maury Service is called out to resolve a non-product related fault.
Your statutory rights are not affected.
CUSTOMER CARE
Chaffoteaux & Maury Ltd., as a leading manufacturer of domestic and commercial water heating appliances is committed to
providing high quality products and a high quality after sales service. If it is necessary to contact an engineer, then telephone
the national warranty helpline 0870 243 0224.
Advice on installation or servicing can also be obtained by contacting the Chaffoteaux Customer Services Department at
Telford.
CUSTOMER SERVICES DEPARTMENT
Tel: 01952 222288
Fax: 01952 260915
GUARANTEE
The manufacturer’s guarantee is for 12 months from the date of purchase. The guarantee is invalidated if the appliance is not
installed in accordance with the recommendations made herein or in a manner not approved by the manufacturer. To assist us
in providing you with an efficient after sales service, please return the guarantee registration card enclosed with the boiler
without delay.
STATUTORY REQUIREMENTS
The installation of this appliance must be carried out by a CORGI Registered person or other competent person and in
accordance with the requirements of the Gas Safety (Installation and Use) Regulations.
In addition, the installation must also comply with the current bylaws of Local Water Undertakings, Building Regulations, IEE
Wiring Regulations, Local Authority Building Standards (Scotland) Regulations and the Safety Document 635 The Electricity at
work Regulation. The appliance named below does not contain any asbestos or asbestos products, or mercury
derivatives. Additional CFC’s have not been used in this product.
The appliance does not contain any potential hazard in relation to the COSHH regulations.
It should also be carried out in accordance with current editions of the following British Standards Codes of practice: 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 possibility of the incoming mains water pressure exceeding 10 bar then a suitable pressure limiting valve must be
fitted where pressures exceed 6 bars a pressure limiting is preferred.
Precautions: During servicing, keep the dust generation to a minimum and avoid inhaling any dust and contact with the skin
and eyes. Normal handling and use will not present any discomfort, although some people with a history of skin complaints
may be susceptible to irritation. When disposing of the ceramic lining, ensure that it is securely wrapped and wash hands after
contact.
TO CONTACT C&M SERVICE, PLEASE CALL THE NATIONAL WARRANTY HELPLINE ON:
0 870 243 0224
To The Installer
As part of the commissioning of this appliance it is vital that the Logbook is completed and given to the Householder. Please
ensure that your customer is aware of the importance of keeping the Logbook safe as a record of the installation and the
appliance service history.
Please ensure that your customer is aware of the correct operation of the system, boiler and controls.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
3
Contents
CUSTOMER CARE
Page
Guarantee ............................................................................................................................................................2
Statutory Requirements .......................................................................................................................................2
Contents ...............................................................................................................................................................3
INSTALLER’S INSTRUCTION.............................................................................................................................5
1 DESCRIPTION ................................................................................................................................................5
2 DIMENSIONS .................................................................................................................................................6
3 HYDRAULIC DATA .........................................................................................................................................6
4 INSTALLATION REQUIREMENTS ................................................................................................................7
Location ...................................................................................................................................................7
Flue ..........................................................................................................................................................7
Ventilation ................................................................................................................................................7
Gas Supply .............................................................................................................................................7
Electrical Supply ....................................................................................................................................7
Showers ...................................................................................................................................................7
Flushing and Water Treatment ...............................................................................................................7
System Controls ......................................................................................................................................7
5 CONNECTING GAS INTAKE AND EXHAUST DUCTS ..................................................................................8
6 INSTALLING THE BOILER ...........................................................................................................................10
7 ELECTRICAL CONNECTIONS ....................................................................................................................11
8 OPERATING..................................................................................................................................................12
Pressurising ...........................................................................................................................................12
Settings ..................................................................................................................................................12
Burner gas output setting ......................................................................................................................13
9 FITTING THE CASING ..................................................................................................................................14
10 GAS CONVERSION ......................................................................................................................................15
11 INCORRECT FUNCTION .............................................................................................................................16
12 PARTICULAR CHARACTERISTICS ............................................................................................................17
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
4
USER’S INSTRUCTIONS
Page
13- CONTROL PANEL .......................................................................................................................................18
14- HOW TO USE ..............................................................................................................................................19
15 MAINTENANCE ............................................................................................................................................20
16 FLUE GAS SAFETY .....................................................................................................................................20
17 GUARANTEE ................................................................................................................................................20
18 PRACTICAL INFORMATION ........................................................................................................................20
19 TECHNICAL DATA .......................................................................................................................................21
20 INSTRUCTION FOR SETTING THE BUILT IN CLOCK................................................................................22
21 INCORRECT FUNCTION ..............................................................................................................................23
This instruction booklet is especially designed for appliances installed in United Kingdoms
INTRODUCTION
The
MX2 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 850 mm maximum and includes an
elbow adapter that can be rotated through 360 ° . The horizontal flue can extend up to 4 metres using 1 metre
flue extension kits. 45 ° and 90° flue bends are also available as accessories.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
5
1
Description
INSTALLER’S INSTRUCTIONS
Fig.1
1
2
14
4
5
6
12
3
10
15
17
16
18
Fig.2
7
8
9
11
1.- Steel chassis complete with expansion vessel
2.- Sealed chamber
3.- Flue hood with fan
4.- Main heat exchanger
5.- Combustion chamber
6.- Multi- gas burner assembly comprising ignition and
ionisation electrodes
7.- Gas valve assembly
8.- Pump with automatic air separator and automatic vent
9.- Overheat safety cutout
10 - Main exchanger inlet thermistor
11.- Main exchanger outlet thermistor
12.- Electrical box
13.- Hot water flow sensor
14.- Air pressure switch
15.- Ignitor
16.- Central heating pressure relief valve
17.- Three way valve
18.- Secondary heat exchanger
19. - Pressure gauge
20. - On/off push button and power on indicator light
21.- Sanitary temperature setting and sanitary start button
22.- Heating temperature setting and heating start button
23.- Heating temperature indicator and operating faults
indicator
24.- Orange indicator - Burner ON
25.- Reset push button and red indicator locking light
13
20
21
23
25
22
24
19
Fig.3
c
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
6
440
450 mini pour entretien
Fig. 4
2 Dimensions
54 54 54 54
JKLMN
I
JKLMN
32
296
141
289
15
21
720
652
121,5
I
172,5
18,5
18
All dimensions in mm
With packaging :
24 kW : 32 kg
30 kW : 33 kg
3
Hydraulic data
Fig. 5
Fig. 6
The water heater is fitted with an automatic by-pass as
standard.
The graph (fig. 5) shows the developmentof the pressure
available in relation to flow (on exit from the boiler).
To ensure correct operation, the minimum flow of the
appliance must be 300 l/h. (Thermostatic taps closed).
Capacity of the installation.
The water heater is fitted with a pressurised expansion
vessel.
Maximum. volume of expansion vessel: 6 litres.
Pressure: 1 bar.
The volume of the expansion vessel in a pressurised
appliance varies according to:
- the average operating temperature in °C
- the static height, which is the difference in metres between
the highest point of the appliance and the expansion vessel
axis).
The minimum cold filling pressure of the appliance is 1 bar
(recommended pressure between 1.2 and 1.7 bar).
The pressure of the expansion vessel should always be
greater than the static height (in metres) divided by 10.
0
4
3
2
1
5
6
100
200 800
700
600
500
400
300
900
1000
1100
1200
l/h
mCE
Débit mini (robinets thermostatiques fermés)
Pression disponible
20 40 60 80 100 120
Pf
140 160 180 200 220 240
1,0
1,1
1,2
1,3
1,4
1,5
1,6
1,7
1,8
1,9
2,0
Capacité maximale de l'installation (en litres)
260
Pression à froid pour le circuit chauffage (en bar)
280
40°C
50°C
60°C
70°C
80°C
390
minimum space required 450
I Safety valve C/H and condensate
J
Heating flow
K
D.H.W. flow
L
Gas supply
M
Cold water inlet
N
Heating return
C liter
Pump head chart available at the outlet of the boiler
System capacity chart
Pump head available
Minimum flow rate (with all heating thermostatic valves closed)
Central heating initial pressure when cold (in bar)
Diagramme de contenance en eau.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
7
4 Installation requirements
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. A compartment or cupboard may
be used provided that it has been purpose-built or modified for
the purpose. It is not necessary to provide permanent
ventilation for cooling purposes. 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.
Avoid to install the boiler where the air inlet can be polluted
by chemical products such as chlorine (swimming pool aera),
or ammonia (hair dresser), or alcalin products (launderette)
Flue
Detailed information on flue assembly is contained in the
appropriate starter pack.
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 Above an opening, window, etc 300 mm
- C Horizontally to an opening, window, etc 300 mm
- D Below gutters, soils pipes or drain pipes 75 mm
- E Below eaves 200 mm
- F Below balconies or car port roof 200 mm
- G From a vertical drain pipe or soil pipe 150 mm
- H From an internal or external corner 300 mm
- I Above ground roof or balcony level 300 mm
- J From a surface facing the terminal 600 mm
- K From a terminal facing the terminal 1200 mm
- L From an opening in the car port into the dwelling 1200 mm
- M Vertically from a terminal on the same wall 1500 mm
- N Horizontally from a terminal on the same wall 300 mm
- Q Fixed by Ubbink Rolux 4 GM flue terminal
It may be necessary to protect the terminal with a
guard. Reference should be made to the Building
Regulations for guidance. Suitable guards may be
obtained from the following manufacturer:
Quinnel Barret & Quinnel Wireworks
Old Kent Road
London SE15 1NL
Tel: 0171 639 1357
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.
Gas Supply
The gas installation and soundness testing must be in
accordance with the requirements of BS 6891.The boiler
requires a 22 mm supply. Ensure that the pipe size is
adequate for 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 doublepole 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.
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 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 Dearborn Ltd
Foundry Lane
Widnes
Cheshire
WA8 8UD
Tel: 0151 424 5351
Fernox Manufacturing
Britannica Works
Clavering
Essex
CB11 4QZ
Tel: 01799 550811
System Controls
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.
Fig. 7
A
B
G
H
J
C
L
M
N
K
I
D,E
F
Q
H
N
M
Q
Q
I
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
8
5
Connecting gas intake and exhaust ducts
5.1 TYPE OF COAXIAL OUTLET (C12, C32, C42) xx
L max = 4 m
Ø 60/100 mm
136
The boiler should only be installed with a fresh air inlet and smoke outlet device supplied by the boiler manufacturer.
These kits are supplied separately to the appliance in order to respond to different installation solutions. For more information
with regard to the inlet/outlet accessories consult the accessory catalogue and the installation instructions contained in the kits.
The boiler is predisposed for the connection to a twin flow concentric gas intake and exhaust duct system
Warning
The exhaust gas ducts should not be in contact with or close to
inflammable material and should not pass through building structures or
walls made of inflammable material.
When replacing an old appliance, the gas intake and exhaust duct system
will also have to be changed.
Important
Ensure that the gas intake and exhaust
passages are not blocked.
Ensure that the exhaust gas ducts do not
have leaks
Concentric outlet Restrictor
60/100 ø 88,5 Without restrictor Max.length
24 kW
L min. = 0,3 m L min. = 1 m 4 m
L max. = 1 m L max. = 4 m /
30 kW
L min. = 0,3 m L min. = 1 m 4 m
L max. = 1 m L max. = 4 m /
There is also the possibility of using an exhaust gas duct with separate tubes by using
an adaptor on the outlet header and by inserting the tube in the air intake envisaged for
this purpose.
In order to use the air intake, you should:
1) Take the air intake cover off
2) Assemble the flange on the header supplied with the boiler
3) Assemble the membrane, if necessary, on the tube or the elbow
4) Insert the header on the tube or the elbow up until the lower stop
(you do not have to use the washer).
5) Insert the elbow/header in the boiler air intake hole and fasten it with screws
If the two elbows or in
the same lateral
direction and if you
need to reduce the
required space, the
minimum 230 mm
measurement can be
reduced by carefully
cutting the elbow below
the air inlet by 25 mm
123,5 135
230 MIN *
200
132
123,5
200
107
25
L = total length of gas intake and exhaust ducts.
5.2 TYPE OF TWIN FLOW CONCENTRIC EXHAUST DUCT (C12, C32, C42, C52, C82) xy
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
Loading...