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GENERAL

6

Mexico Super CF495 - CF4140

 -

 Installation & Servicing

The TTB is an automatic device which will reset once the wind
conditions have returned to normal, subject to a built-in reset
delay in excess of 10 minutes

The TTB is an important safety device and must not be put out of
action or interfered with in any way.

This device is not a substitute for an independently mounted
carbon monoxide detector.

In cases of repeated or continuous shutdown a competent
person should be called to investigate and rectify the condition
causing this and carry out an operational test after each
intervention on the device. Only the manufacturer's original parts
should be used for replacement.

AIR SUPPLY

Detailed recommendations for air supply are given in
BS.5440:2. In IE refer to I.S. 813:2002.  The following notes are
for general guidance:

1.

The room or internal space in which the boiler is installed
MUST have, or be provided with, a permanent air vent.  This
vent MUST be either direct to outside air or to an adjacent
room or internal space which must itself have, or be provided
with, a permanent air vent at least the same size direct to
outside air.

The minimum effective area of the permanent air vent(s) are
specified in Table 3 and are related to maximum rated heat
input of the boiler.

The complete installation MUST be tested for gas soundness
and purged as described in the above code.

FLUE INSTALLATION

The flue must be installed in accordance with the
recommendations of BS. 5440-1:2000.  In IE refer to I.S. 813:2002.

The following notes are intended for general guidance:

1.

The cross-sectional area of the flue, serving the boiler, MUST
NOT be less than the area of the flue outlet of the boiler.

If flue pipe is to be used it MUST NOT be less than the
diameter of the flue outlet connection on the boiler.

2.

Flue pipes and fittings should be constructed from one of the
following materials:

a.

Aluminium or stainless steel.

b.

Cast iron, coated on the inside with acid resistant vitreous
enamel.

c.

Other approved material.

3.

If twin walled flue pipe is used it should be of a type
acceptable to British Gas.

4.

If a chimney is to be used it should preferably be one that is
composed of, or lined with, a non-porous acid resistant
material.

Notes.

Chimneys lined with salt -glazed earthenware pipes are
acceptable if the pipes comply with BS.65 and BS.5440:1.
 A flue pipe constructed from one of the materials listed in
2 a-c should form the initial connection to the lined chimneys.
Where a chimney is to be used that is 

not

 composed of, or

lined with, a non-porous, acid resistant material it should be
lined with a stainless steel flexible flue liner which complies
with BS.715.

5.

Before connecting the boiler to, or inserting a liner into, a flue
that has been previously used then the flue MUST be
thoroughly swept clean of any soot or loose material.  If a
register plate, restrictor plate or damper etc., is fitted in the
flue then it MUST be removed before connecting the boiler to,
or inserting a liner into, the flue.

6.

The flue should terminate in accordance with the relevant
recommendations given in BS.5440-1:2000.  In IE refer to
I.S.813:2002.

7.

The flue MUST be fitted with a terminal (or ridge tile up to 5"
flue diameter).  The terminal shall be of a type which has
been tested and found satisfactory by British Gas.  This
terminal must NOT be installed within 600mm (24") of an
opening window, air vent or any other ventilation opening.

8.

The chimney / flue lining MUST be sealed at both the top and
the bottom.

IMPORTANT.

 It is absolutely ESSENTIAL to ensure, in practice,

that  the flue discharge is in a downdraught- free zone and that
products of combustion discharging from the terminal cannot re-
enter the building or any other adjacent building through
ventilators, windows, doors, other sources of natural air
infiltration or forced ventilation / air conditioning systems.

TTB DOWNDRAUGHT THERMOSTAT

This appliance is fitted with a TTB downdraught thermostat for
added safety and protection. If this thermostat should operate
and switch off the appliance it is because the flue is subject to
downdraught, probably as a result of adverse wind conditions.

The air vent(s) must NOT have provision for closing or
adjustment and should be sited to avoid risk of accidental
damage or blockage.

If other methods of ventilation are envisaged, British Gas
should be consulted before proceeding.

2.

If the boiler is to be installed in a cupboard or compartment,
permanent air vents are required (for combustion, flue
dilution and cooling purposes) in the cupboard /
compartment, at both high and low levels to ensure safe and
efficient combustion and ventilation.

The air vents may either communicate with room/internal
space (appropriately ventilated) or be direct to outside air.
The minimum effective areas of the permanent air vents,
required in the cupboard / compartment, are specified in
Table 4 and are related to maximum rated heat input of the
boiler.

Boiler size

CF495

CF4120

CF4140

Effective

146

189

211

area

cm

2

 (in

2

)

(23)

(30)

(32)

Table 3

Table 4 - High and low vent areas

Boiler

Air from room/internal

Air direct from outside

space cm

2

 (in.

2

)

cm

2

 (in.

2

)

High Level Low Level High level

Low Level

CF495

354 (55)

708 (110)

177 (28)

354 (55)

CF4120

440 (69)

880 (138)

220 (35)

440 (69)

CF4140

485 (74)

970 (148)

243 (37)

485 (74)

200944-1.p65

3/8/2004, 3:41 PM

6

Содержание Mexico Super CF495

Страница 1: ...ENGINEERED FOR PEACE OF MIND When replacing any part on this appliance use only spare parts that you can be assured conform to the safety and performance specification that we require Do not use reco...

Страница 2: ...in 533 21 0 600 23 6 750 29 5 Table 1 General Data Table 2 Performance Data Key to symbols GB United Kingdom Countries of IE Ireland destination PMS Maximum operating pressure of water B11BS An appli...

Страница 3: ...ly Scale reducer n a Hot water mode Heat input n a Max operating burner pressure n a Max operating water pressure n a Cold water inlet temp n a Hot water outlet temp n a Water flow rate at max setting...

Страница 4: ...s are certificated by the British Standards Institution for safety and performance It is important therefore that no external control devices e g flue dampers economisers etc are directly connected to...

Страница 5: ...r the LH side or the RH side DURING installation Refer to Frame 11 A MINIMUM clearance of 25mm 1 MUST also be maintained between the flue pipe and any adjacent combustible material In addition a MINIM...

Страница 6: ...ed with a non porous acid resistant material it should be lined with a stainless steel flexible flue liner which complies with BS 715 5 Before connecting the boiler to or inserting a liner into a flue...

Страница 7: ...e located in accessible positions which permit the draining of the whole system including the boiler and hot water storage vessel They should be at least 1 2 BSP nominal size and be in accordance with...

Страница 8: ...e MUST be made if surging is liable to occur If in any doubt contact Caradon Ideal Limited 3 MINIMUM REQUIREMENTS Fully pumped systems 4 GRAVITY HOT WATER PUMPED CENTRAL HEATING 1 Separate flow and re...

Страница 9: ...expansion vessel must be connected at a point close to the inlet side of the pump the connecting pipe being not less than 15mm 1 2 nominal size and not incorporating valves of any sort b The vessel ca...

Страница 10: ...between them the stop valve being located between the system and the automatic air vent The stop valve may remain open during normal operation of the system if automatic water make up is required b Th...

Страница 11: ...ignment rings and O rings 6 Thermostat pocket 7 Distributor tube 8 Combustion chamber 12 Collector hood 16 Front plate assy 18 Burner manifold 24 Gas valve 28 Gas cock 41 Draught diverter back panel a...

Страница 12: ...tion and Servicing Users Instructions The boiler is supplied fully assembled in Pack A Unpack and check the contents 8 UNPACKING HARDWAREPACK Thermostat pocket 1 off Thermostat clip 1 off Thermostat r...

Страница 13: ...the PCB lead 4 Remove the Burner On neon cable from the back of the control panel 5 Unplug the in line connector to the TTB thermostat 6 Remove the 2 screws securing the control panel and disengage th...

Страница 14: ...separate zones must have a common return connection to the distributor tube 2 Select the desired pumped flow tapping 3 Screw the supplied boiler thermostat pocket into the appropriate front section t...

Страница 15: ...rectly above the boiler should be provided 14 WATER TREATMENT These boilers incorporate a cast iron heat exchanger IMPORTANT The application of any other treatment to this product may render the guara...

Страница 16: ...The appliance MUST be efficiently earthed A mains supply of 230 V 50 Hz fused at 3A is required All external controls and wiring MUST be suitable for mains voltage Wiring should be in 3 core PVC insul...

Страница 17: ...e details Cylinder Thermostat Terminal Boiler supply connector Pump Terminal strip suitably enclosed Typical programmer CH may be selected independently MAINS Notes 1 Some earth wires are omitted for...

Страница 18: ...nge gy grey y g yellow green Gravity HW Pumped CH Diagram A shows a double pole frost thermostat which should suffice for all systems which do not use the OFF terminals of the programmer Diagram B sho...

Страница 19: ...retaining clip Split pin MEX 729 1 Offer up the LH side panel locating it with the peg in the baseplate and push the panel back 2 Secure the panel to the baseplate and collector hood 3 Repeat steps 1...

Страница 20: ...uing until the pilot is established The main burner will then cross light smoothly If this sequence does not occur refer to the Fault Finding section 6 Test for gas soundness around ALL boiler gas com...

Страница 21: ...stem controls should be fully explained to the householder to ensure the greatest possible fuel economy consistent with household requirements of both heating and hot water consumption Advise the User...

Страница 22: ...s are covered more fully in Frames 28 35 and MUST BE CARRIED OUT IN SEQUENCE WARNING Always turn OFF the gas supply at the gas service cock and switch OFF and DISCONNECT the electrical supply to the a...

Страница 23: ...the manifold nuts to remove both burners from the burner front plate manifold assembly 5 From each burner remove the 2 air box securing nuts and CAREFULLY remove the air box and venturi arrangement 6...

Страница 24: ...they are correctly repositioned Refer to Frame 10 2 Refit the flue cleanout cover renewing any damaged or deteriorating sealing gasket 3 Refit the casing top panel 4 Reconnect the electrical wiring en...

Страница 25: ...that a The injector is in position when refitting the pilot supply b A gas tight joint is made c The spark gap is correct Refer to Frame 45 When replacing any component 1 Isolate the electricity suppl...

Страница 26: ...reverse order 1 Refer to Frame 38 2 Remove the 2 screws and lift off the lower front panel Refer to Frame 30 3 Pull off the thermostat knob 4 Disconnect the in line connector on the PCB lead 5 Remove...

Страница 27: ...p 7 Disconnect the ignition lead from the base of the electrode and the PCB and withdraw the lead 8 Fit the new lead and reassemble in reverse order 1 Refer to Frame 38 2 Remove the 2 screws and lift...

Страница 28: ...hers securing the bottom burner baffle and remove the baffle 7 Remove the 2 screws securing the pilot burner and pull the assembly clear of the main burner 8 Remove the 4 nuts and washers securing the...

Страница 29: ...GAS VALVE REPLACEMENT Gas control valve Gas inlet pipe Pilot supply connection MEX 2150 Burner manifold 6 7 4 8 O ring seal Securing screws 1 Refer to Frame 38 2 Remove the 2 screws lift off the lower...

Страница 30: ...the boiler and carefully lift the TTB bracket from its retaining slot and clip 6 Withdraw the thermostat bracket and lead down the side of the boiler 7 Locate and fit the new TTB downdraught thermosta...

Страница 31: ...verheat stat Has the fuse on the PCB blown Reset the overheat stat Set control stat to maximum Allow the boiler to reach temperature if the overheat stat trips again measure flow temperature If above...

Страница 32: ...ndraught thermostat 1 173 143 49 E01 540 Flue baffle CF495 2 134 737 Flue baffle CF4120 2 157 924 E01 530 Flue baffle CF4140 1 135 770 67 308 557 Thermostat knob 1 111 904 The following are parts comm...

Страница 33: ...HORT PARTS MEX 2151 17 20 22 23 30 26 21 27 24 67 66 44 1 52 BOILER CASING ASSEMBLY MEX 2152 76 63 73 75 77 46 73 Legend 46 Baseplate 62 Casing complete 63 Controls panel complete 73 Side panel 75 Cas...

Страница 34: ...te 17 Sightglass 18 Burner manifold 19 Pilot pipe 20 Burner 21 Burner injector 2 off 22 Pilot burner 24 Gas valve 25 O ring 26 Ignition electrode 27 Ignition lead 28 Gas service cock Legend 63 Control...

Страница 35: ...LIST OF PARTS 35 Mexico Super CF495 CF4140 Installation Servicing 55 PCB BOX Exploded View Legend 29 PCB chassis assy 30 PCB sub assy 33 PCB support 37 PCB cover 33 29 30 37 MEX 2155...

Страница 36: ...f first class training courses for domestic commercial and industrial heating installers engineers and system specifiers For details of courses please ring 01482 498 432 THIS SYMBOL IS YOUR ASSURANCE...

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