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SERVICING

22

Mexico Super CF495 - CF4140

 -

 Installation & Servicing

29 SCHEDULE

To ensure the continued safe and efficient operation of the
appliance, it is recommended that it is checked at regular
intervals and serviced as necessary. The frequency of
servicing will depend upon the installation condition and
usage but should be carried out at least annually.

It is the law that any service work must be carried out by a
CORGI registered installer. In IE servicing work must be
carried out by a Competent Person.

a.

Light the boiler and carry out a pre-service check,
noting any operational faults.

b.

Clean the main burners and lint gauzes.

c.

Clean the lower front panel lint gauze.

d.

Clean the heat exchanger.

e.

Clean the main injectors.

f.

Check that the flue is unobstructed and that the flue
system, including the flue cleanout cover, is sealed
correctly.

g.

If the appliance has been installed in a compartment,
check that the ventilation areas are clear.

The servicing procedures 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 appliance 

BEFORE SERVICING.

IMPORTANT.

 After completing the servicing or exchange of

components always test for gas soundness, carry out
functional checks as appropriate and test for spillage. Refer
to Frame 26.  

Note.

 

It may be necessary to remove the boiler

casing to carry out the spillage test.

30 BOILER CASING REMOVAL

Thermostat phial

Thermostat pocket

Phial retaining 
clip

Split pin

MEX 729

1.

Remove the 2 screws and lift off the lower
front panel.

2.

Remove the 2 screws and lift off the grille
assembly.

3.

Disconnect the in-line connector on the PCB
lead.

4.

Remove the Burner On neon cable from the
back of the control panel.

7.

Remove the 2 screws securing the control panel and
pull down to release the tabs from under the top panel.

8.

If the boiler is not fitted under a work top, access for flue
cleaning will be improved by removing the top panel.

5.

Unplug the in-line connector to the TTB
thermostat.

6.

Remove the thermostat phial from the
pocket as shown.

SER

VICING

200944-1.p65

3/8/2004, 3:41 PM

22

Summary of Contents for Mexico Super CF4120

Page 1: ...e 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 reconditioned or copy parts that have not been clearly authorised by Ideal Boilers CF495 CF4120 CF4140 May 2004 UIN 200 944 A02 ...

Page 2: ...m 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 appliance designed for connection to a flue discharging the products of combustion outside the room with air for combustion being drawn directly from the room where the appliance is installed without a fa...

Page 3: ...nly 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 n a For condensing boilers only Condensate drain n a For all boilers complete sign hand over to customer For GB to comply with Building Regulations Part L1 Part J in Scotland the boiler should be fi...

Page 4: ...es 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 these appliances unless covered by these Installation and Servicing Instructions or otherwise recommended by Caradon Ideal Limited in writing If in doubt please enquire Any direct connection of a co...

Page 5: ...er 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 MINIMUM clearance of 533 mm 21 MUST be available at the front of the boiler for servicing Boiler Clearances Top One side Aggregate A or B A B CF495 mm in 20 3 4 35 1 3 8 135 5 1 4 CF4120 mm in 20 3 4 50 2...

Page 6: ...ned 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 remo...

Page 7: ...be 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 BS 2879 If required a drain tap not supplied may be fitted to an unused bottom 1 BSP tapping on the front of the boiler BOILER CONTROL INTERLOCKS Caradon Ideal Limited recommend that heating systems...

Page 8: ...ce 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 return connections are used for each service All possible configurations are given in Frame 11 and ONLY those shown should be used 2 The schematic pipework graph is based on the assumption that NO MORE...

Page 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 capacity must be adequate to accept the expansion of the system water when heated to 110 o C 230 o F c The charge pressure must not be less than the static water head above the vessel The pressure atta...

Page 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 Through a self contained unit comprising a cistern pressure booster pump if required and if necessary an automatic pressure reducing valve and flow restrictor The cistern should be supplied through a t...

Page 11: ...lignment 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 assembly 41 1 TTB downdraught thermostat bracket 46 Boiler base plate 49 Flue baffle 47 Heat shield 68 Retention clip 69 Split pin 94 Cleanout cover 94 49 41 1 2 1 7 Tie rod 8 46 Mex 2127 Data badge 2...

Page 12: ...ation 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 retaining pin 1 off 1 BSP plugs 5 off 1 x 1 2 BSP reducing bush 1 off Distributor tube Cable strap 2 off 28mm Comp nut 1 off 28mm olive 1 off INSTALLATION ...

Page 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 the panel by lowering and pulling it forward 7 Remove the 2 screws securing the top panel to the side 8 Draw the top panel forward and lift it off the boiler 9 Remove the 2 screws securing the LH side ...

Page 14: ...g 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 tapping using an approved jointing material Refer to Tables 6 and 7 4 Connect pipe fittings to the rear tappings and plug any unused tappings Note If using iron elbows fit a short straight connector i...

Page 15: ...irectly 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 guarantee of Caradon Ideal Limited INVALID Caradon Ideal Limited recommend Water Treatment in accordance with the Benchmark Guidance Notes on Water Treatment in Central Heating Systems Caradon Ideal Limit...

Page 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 insulated cable NOT LESS than 0 75 mm2 24 x 0 2 mm to BS 6500 Table 16 Wiring external to the boiler MUST be in accordance with current l E E BS 7671 Wiring Regulations and local regulations For Ireland r...

Page 17: ...ve 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 clarity Ensure proper earth continuity when wiring 2 Numbering of terminals on thermostats is specific to the manufacturer 3 This is a fully controlled system set the boiler thermostat to maximum 4 S...

Page 18: ...ange 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 shows a change over frost thermostat which will cover most systems which do use CH OFF If however on such a system the HW pipework is in an isolated part of the house a second frost thermostat may be us...

Page 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 and 2 to refit the RH side panel 4 Place the top panel and push back 5 Secure the top panel to the side panels IMPORTANT Wiring within the boiler casing must be neatly secured with the cable straps p...

Page 20: ...nuing 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 components using leak detection fluid 7 Operate the boiler for 10 minutes to stabilise the burner temperature 8 The boiler is preset at the factory to its nominal rating If the burner setting pressure r...

Page 21: ...ystem 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 of the precautions necessary to prevent damage to the system and to the building in the event of the system remaining inoperative during frosty conditions Notes a If an optional Programmer Kit is fi...

Page 22: ...es 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 appliance BEFORE SERVICING IMPORTANT After completing the servicing or exchange of components always test for gas soundness carry out functional checks as appropriate and test for spillage Refer to Fr...

Page 23: ...e 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 Withdraw both lint gauzes 1 Remove the 2 screws and lift off the front panel and remove the grille assembly from the casing 2 Disconnect the electrical leads from the gas valve 3 Disconnect the igni...

Page 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 ensuring the TTB thermostat is connected Refit the controls panel ensuring that the thermostat phial and phial retaining clip are correctly located in the thermostat pocket and secured by the split pin...

Page 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 supply 2 Remove the lower front panel and grille assembly 3 Turn off the gas supply at the boiler Note In order to assist fault finding the control box PCB is fitted with 2 indicator lights which represen...

Page 26: ...n 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 the Burner On neon cable from the back of the control panel 6 Unscrew the 2 screws and pull down the control panel so that the 2 tabs clear the top panel 7 Remove the thermostat phial from the pocke...

Page 27: ...ip 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 off the lower front panel Refer to Frame 30 3 Slacken the screw at the thermostat pocket and withdraw the phial from the pocket 4 Remove the thermostat retaining nut and withdraw the thermostat from ...

Page 28: ...shers 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 burner s to the front plate and manifold Withdraw the burner 9 Fit the new burner s and reassemble in reverse order taking care not to damage the main burner injector which is screwed into the burne...

Page 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 front panel then remove the grille assembly Refer to Frame 30 3 Disconnect the electrical leads from the gas valve 4 Disconnect the ignition lead from the PCB 5 Undo the gas cock union Remove the 4 ...

Page 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 thermostat bracket and lead and reassemble in reverse order ensuring that the in line connector is secured 1 Refer to Frame 38 2 Remove the 2 screws and lift off the lower front panel Refer to Frame 30 3 Undo...

Page 31: ...overheat 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 90 C replace control stat If below 90 C replace overheat stat YES Is there a spark at the ignition electrode Does the pilot burner light NO Is there a gas supply to the boiler has the gas supply been...

Page 32: ...wndraught 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 commonly required as replacement components due to damage or expendability Their failure or absence is likely to affect safety or performance of this appliance The list is extracted from the British Gas ...

Page 33: ...SHORT 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 Casing front panel 76 Top panel 77 Grille assy 78 Casing fixing pack not shown ...

Page 34: ...ate 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 Controls panel complete 65 Control box 66 Boiler control thermostat 67 Thermostat knob 64 Control panel 72 Magnetic strip 71 Controls front panel 53 BOILER CONTROL PANEL Exploded View ...

Page 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 ...

Page 36: ...of 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 OF QUALITY These appliances are designed for use with Natural Gas only They have been tested and conform with the provisions of BS 6332 and BS 5258 CERTIFIED PRODUCT Manufactured under a BS EN ISO 90...

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