Chaffoteaux & Maury Mira System CF, Sustem plus CF Installation And Operating Manual

C

COMBINATION BOILER

Heating only (system)

Heating + sanitary hot water together (system plus)

Open flue System

Installation and Operating Manual

GB

TEMP

MODE

MAN

AUTO

T

H

E

R

M

O

R

E

G

U

L

A

T

I

O

N

C

O

M

P

A

T

I

B

L

E

2

Page

12 - controls................................................................................................................ 14

13 - operation ............................................................................................................. 15

14 - maintenance........................................................................................................ 16

15 - evacuation sensor for combustion products ........................................................ 16

16 - warranty............................................................................................................... 17

17 - practical advice ................................................................................................... 17

18 - technical specification ......................................................................................... 18

19 - operating faults.................................................................................................... 19

Page

1 - description........................................................................................................... 3

2 - dimensions .......................................................................................................... 4

3 - water specifications............................................................................................. 4

4 - installation requirements ..................................................................................... 5

5 - fitting the boiler.................................................................................................... 6

6 - electrical connections.......................................................................................... 7

7 - starting up ........................................................................................................... 8

8 - fitting the casing .................................................................................................. 10

9 - gas conversion .................................................................................................... 11

10 - fault codes .......................................................................................................... 12

11 - points to note....................................................................................................... 13

Installer’s instruction

User’s instruction

Contents

3

INSTALLER’S INSTRUCTION

Fig.1

1

2

4

5

6

12

3

10

8

9

11

1.- sheet steel frame with expansion vessel

2.- overflow safety device

3.- draught diverter

4.- copper main heat exchanger

5.- combustion chamber

6.- multigas burner comprising:

• a removable injector manifold

• a ignition electrode

• a flame detection electrode

7.- gas valve assembly comprising:

• two safety solenoid valves

• a control solenoid valve

8.- circulating pump with automatic vent

9.- overheat sensor

10.- main heat exchanger inlet thermistor

11.- main heat exchanger outlet thermistor

12.- electronic control unit

15.- ignitor

16.- central heating pressure relief valve

19. - heating circuit pressure gauge

20. - ON/OFF push button and ON indicator light

21.- sanitary accumulation start button and tank

temperature setting button

22.- heating function ON and heating temperature

adjustment knob

23.- heating temperature and operating fault indicator

24.- orange burner operating indicator light

25.- reset push button and red locking indicator light.

1. Description

Fig.3

20

21

23

25

22

24

19

C

15

16

Fig.2

7

(system plus)

4

440

450 mini pour entretien

Fig.4

54 54 54 54

JKLMN

I

JKLMN

32

296

21

720

691,5

121,5

I

172,5

175,3

ø

125

1,80 m mini du sol

289

4,7

Measurements in mm

Weight with packaging:

24 kW: 29 kg

Fig. 5

Fig. 6

Water content diagram.

Pf = Cold pressure in bar
C = Installation capacity in litres

The boiler is fitted with an automatic by-pass as standard.

The graph (fig. 5) shows the development of 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 boiler is fitted with an expansion vessel.

Maximum volume of expansion vessel: 6 litres.

Inflation Pressure: 0,7 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 installation and the expansion vessel axis).

The minimum cold filling pressure of the installation is 0,7 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

C

390

450 min. for maintenance

Pressure available

Minimum flow rate with the heating thermostatic valves

Heating circuit pressure when cold (bar)

Maximum system capacity (litres)

2. Dimensions

3. Hydraulic characteristics

I

Safety valve outlet

J

Heating flow and tank

K

Tank backflow (system plus)

L

Gas inlet

M

Cold water supply

N

Heating backflow

▲

5

4.1 REGULATIONS

PRIVATE HOMES

STATUTORY REQUIREMENTS FOR INSTALLATION AND
MAINTENANCE

Installation and maintenance of the equipment must be car­ried out by a qualified professional in accordance with cur­rent legislative texts and state of the art, including:

- law of 2 August 1977

Technical and Safety rules applicable to combustible gas
and liquefied gas petroleum installations located inside
buildings or outbuildings

- law of 5 February 1999 modifying the law of 2 August
1977

after replacing a boiler with an identical one (same align­ment and area as the previous equipment), the installer
must make out a "model 4" certificate of conformity

- Standard DTU P 45-204 ­gas installations (previously DTU N°61-1 - Gas

Installations - April 1982 + additional clause N°1 of July

1984)

- Regional Health Regulations

Protection of the drinking water network:

• articles 16-7 and 16-8 of the Regional Health Regulations

require the installation to have a CB type disconnection
device with various non-controllable pressure zones,
conforming to the functional requirements of French
Standard NF P 43-011, to prevent heating water being
returned to the drinking water network

• an NF backflow preventer is fitted in the boiler's tap fit-

tings unit

• French Standard NF C 15-100 - Low voltage electrical

installations - Rules

PUBLIC BUILDINGS

STATUTORY REQUIREMENTS FOR INSTALLATION

Installation and maintenance of the equipment must be car­ried out by a qualified professional in accordance with cur­rent legislative texts and state of the art, including:

- fire safety and panic control regulations for public
buildings:

a) General requirements

for all equipment:

• GZ articles

Combustible gas and liquefied gas petroleum installa­tions

• CH articles

heating, ventilation, refrigeration, air conditioning, steam
and domestic hot water production

b) Special requirements for each type of building with

public access (hospitals, shops, etc.)

Recommendation:

if the area is exposed to the risk of lightning (isolated ins­tallation at the end of an electricity line, etc.) install a light­ning conductor

Our warranty is subject to this requirement.

4.2 BOILER LOCATION

- install the boiler near a duct for removing the
products of combustion

- never install the boiler above hot-plates or ovens or in
general over any equipment producing greasy vapours
which could make the boiler dirty and affect its operation

- prepare a wall and mountings able to support the weight of
the boiler (weight: approx. 35 kg)

- take precautions to reduce noise

4.3 DESIGNING AND CARRYING OUT THE INSTALLA-

TION

Domestic hot water circuit (system plus)

- Avoid excessive loss of charge in preheating circuit

- if the water hardness is more than TH 25, install a water
softener

- if a non-return valve is present, a device allowing for
expansion is required (available as an option)

See domestic hot water technical directive (DTU)

Central heating circuit

Circulation flow rate:

- when working out the measurements, be careful to main­tain a minimum flow rate of 300 l/h, with the thermostats
closed

Precautions against corrosion

Operating faults due to corrosion are likely to occur if the
system is built with components made of different materials.

To prevent such problems it is advisable to use a corrosion
inhibitor.

Take every precaution to prevent the treated water from
becoming corrosive.

Old installation:

- fit a sediment trap to the lowest point on the backflow and
treat the system correctly

Recommendation:

- fit bleed valves on all radiators and to high points of the
installation; also fit drain cocks to low points

Evacuation of burnt gas

See DTU 24-6 and technical rules
This boiler must only be connected to a duct with a natural

draught
Connection is provided for fitting a 125 mm Ø pipe for 24
kW inside the outlet neck of the draught diverter.

Fit a drip pot to prevent any condensation from the chimney
falling into the boiler.

4. Installation requirements

6

Fig. 8

1

2

Fig. 7

A

A

- place the paper installation jig in the selected position on the wall

- fit the hanging bracket

- bring the water pipes and the electrical connection to the locations shown on the fitting template

- remove the 2 locking screws A which secure the front panel (fig. 7)

- remove the front panel

- offer the boiler up to its bracket and allow it to drop into position while pressing on it (fig. 8)

- ensure water and gas connections using the various seals required (rubber seal for gas) and position the metal filter in the
heating backflow connection.

Safety valve drain hole 16 MUST be connected to a waste water pipe.
finish by connecting the chimney:

- use a connecting pipe or elbow specially approved for gas (99.5 % pure aluminium or stainless steel)

- connection is provided to fit the pipe or elbow inside the outlet neck of the boiler's draught diverter

Cleaning the appliance

Once the water has been connected, it is essential to clean the installation with an appropriate product (dispersing agent) to
remove filings, solder, and various factory oils and greases.

The use of any solvent or aromatic agent (petrol, oil etc.) is forbidden.

We recommend treating the whole heating system as soon as it is commissioned to maintain a pH between
9 and 9.5.

5. Fitting the boiler

31. Central heating flow isolating valve and tank

32. Tank backflow (system plus)

33. Gas service tap

34. Cold water supply

35. Central heating return isolating valve

16

Fig. 9

31

32

33

35

34