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Table of Contents
Related Manuals for Chaffoteaux & Maury MINIMA MX2 24 FF NG
Summary of Contents for Chaffoteaux & Maury MINIMA MX2 24 FF NG
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Page 1: Combination Boiler
MINIMA MX2 COMBINATION BOILER Heating and Instantaneous Domestic Hot Water Fanned Flue system Installation, Operating and Servicing Instructions Manufactures N° Model Type Gas Council N° 200906827037.31 MX2 24 FF NG 47 - 980 - 28 200906828037.31 MX2 30 FF NG 47 - 980 - 29... -
Page 2: Guarantee
These instructions are suitable for the Minima MX2 boilers : Do not forget the Log Book! 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 Log Book for your boiler. -
Page 3: Table Of Contents
Table of Contents CUSTOMER CARE Guarantee Statutory Requirements Table of Contents USER’S INSTRUCTIONS CONTROL PANEL HOW TO USE MAINTENANCE FLUE GAS SAFETY GUARANTEE PRACTICAL INFORMATION INSTRUCTIONS FOR SETTING THE BUILT IN CLOCK INSTALLER’S INSTRUCTION DESCRIPTION DIMENSIONS HYDRAULIC DATA INSTALLATION REQUIREMENTS Reference Standards Codes of Practice Flue... - Page 4 SERVICING INSTRUCTIONS Replacement of Parts 22.1 To Gain General Access 22.1.1 Removing the front panel 22.1.2 Removing the side panels 22.1.3 Removing the control panel door 22.2 Access to the Combustion Chamber 22.2.1 Remove the combustion chamber front panel 22.2.2 Removing the burner manifold 22.2.3 Removing the electrodes...
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Page 5: Control Panel
USER’S INSTRUCTIONS Control Panel Fig. 1 Control panel (Fig. 1) Connecting bracket Taps shown in Open position (Fig. 2) 19. - Pressure gauge 31 : Central heating flow isolating valve 20. - On/off push button and power on indicator light 32 : Domestic hot water outlet 21.- DHW water temperature setting and start button 33 : Gas service tap... - Page 6 How to Use Starting up (Fig. 2) 1. Ensure that the mains gas supply isolating tap is open and that the appliance is supplied with power. 2. Ensure that there is sufficient pressure in the heating circuit: the pressure gauge needle should be at a minimum of 1.2 bar and a maximum of 1.7 bar when cold.
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Page 7: Maintenance
Maintenance 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 marked on the Log Book. Flue Gas Safety The boiler is fitted with a safety system which authorises operation of the burner. If this device does not detect movement in the flue the boiler will shut down for safety reasons, and indicators 40, 60 and 80 flash 23 (Fig. -
Page 8: Instructions For Setting The Built In Clock
Instruction For Setting the Built-in Clock (If Fitted) 1. General layout The mechanical clock covers a 24 hour period. Each tappet represents 15 minutes A (Fig. 4). An override switch is located on the clock B (Fig 4). 2. To set the time To set the time of day, grasp the outer edge of the dial and turn slowly clockwise until the correct time is lined up with the arrow C (Fig. -
Page 9: Installer's Instruction
INSTALLER’S INSTRUCTIONS Description 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 cut-out 10 - Return thermistor 11.- Flow thermistor... -
Page 10: Dimensions
Dimensions All dimensions in mm Safety valve C/H Heating flow D.H.W. flow Gas supply 18,5 Cold water inlet Heating return With packaging : 24 kW : 32 kg 30 kW : 33 kg 172,5 121,5 J K L M N minimum space required 450mm 450 mini pour entretien 54 54 54 54... -
Page 11: Installation Requirements
Installation Requirements Reference Standards Flue In the United Kingdom, the installation and initial start up of the boiler must be by a CORGI Registered installer in Detailed information on flue assembly can be found in Section accordance with the installation standards curently in effect, 12 “Connecting the Flue”. -
Page 12: Gas Supply
Installation Requirements (continued) Fernox Manufacturing Ventilation Britannica Works The room in which the boiler is installed does not require specific Clavering ventilation. If it is installed in a cupboard or compartment Essex CB11 4QZ permanent ventilation is not required for cooling purposes. Tel: 01799 550811 Gas Supply The gas installation and soundness testing must be in... -
Page 13: Connecting The Flue
Connecting the Flue The boiler must only be installed with a flue 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 flue brochure and the following instructions.. The boiler is predisposed for the connection to a twin flow concentric gas intake and exhaust duct system. - Page 14 Connecting the Flue (continued) e.g. X = 508mm + 22mm = 530mm 860 - 530 = 330mm (Length to be cut from the plain end of the flue). Once cut to the required length, ensure that the flue is free from burrs and reassemble the flue. If fitting the flue from inside of the building attach the grey outer wall seal to the flue terminal and push through the flue through the hole, once the wall seal has passed through the hole, pull the flue back until the seal is flush with the wall.
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Page 15: Fitting The Coaxial Flue (Ø60/100 Vertical)
Connecting the Flue (continued) 12.3 Fitting the coaxial flue (Ø 60/100 Vertical) ONTENTS (60mm) ILICONE (60/100mm) ONICAL DAPTOR (80/125mm) ERTICAL CREWS The vertical flue kit is supplied with a specially designed weather proof terminal fitted, it can be used either with a flat roof or a pitched roof. - Page 16 Connecting the Flue (continued) must only be cut at the male end and it must be ensured that the distance between the inner and outer flue are kept (Fig. 13). When utilising the vertical flue system, action must be taken to ensure that the flue is supported adequately to prevent the weight being transferred to the appliance flue connection.
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Page 17: Fitting The 5" Flue (Ø80/125)
Connecting the Flue (continued) 12.4 Fitting the 5” flue (Ø 80 / 125) Once the boiler has been positioned on the wall, it is necessary to insert the Ø80/125 adaptor into the boiler flue socket. Place the Ø 60mm insert (Fig. 20) into the boilers exhaust connection; Fit the grey seal over the boilers flue connection and ensuring all lip seals are fitted correctly push the adaptor onto the boilers flue connection, checking that the seal is fitted correctly over the adaptor;... -
Page 18: Fitting The Twin Pipe (Ø80/80)
Connecting the Flue (continued) 12.5 Fitting the twin pipe (Ø80/80) Where it is not possible to terminate the flue within the distance permitted for coaxial flues, the twin flue pipe can be used by fitting a special adaptor to the flue connector and using the aperture for the air intake located on top of the combustion chamber. - Page 19 Connecting the Flue (continued) 60mm inner flue of the concentric terminal connects to the pipe bridge, this point must be adequately sealed with silicone sealant to avoid condense leakage at this point. : Vertical twin flue installations must have a trap on the exhaust. MTS supply a suitable condense trap Part No. 705774 and recommend that this be used in the event that the flue may not form condense.
- Page 20 Connecting the Flue (continued) Concentric outlet Restrictor 60/100 ø 88.5 Without restrictor Max. length 24 kW L min. = 0.3 m L min. = 1 m (Type 1, Type 2, Type 3) L max. = 1 m L max. = 4 m 30 kW L min.
- Page 21 Connecting the Flue (continued) RAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY AIR INTAKE MUST NOT BE FITTED ABOVE THE EXHAUST AIR INTAKE EXHAUST AIR INTAKE Fig. 25...
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Page 22: Installing The Boiler
Installing the Boiler - place the template in the selected position on the wall - fit the hanging bracket - Install the gas and water pipes and the electrical connection to the locations shown on the fitting template - Drill the hole for the flue - unscrew the clamp locking bolt A, which secures the front panel (Fig. -
Page 23: Electrical Connections
Electrical Connections MPORTANT Connection should be via a 3 amp fused double-pole 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. - Page 24 Electrical Connections (continued) - If a remote time clock is to be fitted, using a volt-free switching time clock, connect the switching wires from the time clock following points above (see also Diagram B Fig. 31). - If using an external time clock and room thermostat, these must be connected in series as above (see also Diagram C Fig.
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Page 25: Operating
Operating - Set the system pressure, close filling taps 36, 37 and PRESSURISING (Fig. 32) remove filling loop 38. Domestic Hot Water Circuit: - Check for leaks. - open the cold water tap 34 - Manually check pump is free to turn - open all hot water taps until water flows Gas circuit Central Heating Circuit:... -
Page 26: Burner Gas Output Setting
Operating (continued) Célectic Tempo Débistat Sanitaire 1,5 sec Tempo Débistat Sanitaire 0 sec Domestic hot water flow switch time 1.5 sec. Domestic hot water flow switch time 0 sec. Fonctionnement Modulant On/Off operation Modulating operation Fonctionnement TOR Consigne chauffage à 40 °C Consigne chauffage variable de 35 à... -
Page 27: Fitting The Casing
Fitting the Casing Fitting the casing Remove the protective film on the casing: - offer the casing up (Fig. 34) - engage hooks N on the casing in notches R (operation 1) - fit the top of the panel in place - close the panel mounting clamps (Fig. -
Page 28: Completion
Completion For the Republic of Ireland it is necessary to complete a “Declaration of Conformity” to indicate compliance to I.S. 813. An example of this is given in the current edtion of I.S. 813. In addition to this it is necessary to complete the Log Book. -
Page 29: Setting The Gas Pressures / Gas Type Conversion
Setting the Gas Pressures / Gas Type Conversion When adapting to a gas different from the one for which the boiler is equipped, you should replace the parts delivered with the conversion kit, and make the gas valve adjustments as described below: Fig. -
Page 30: Particular Characteristics
Setting the Gas Pressures (continued) Maximum Burner Pressure (mbar) mbar G 20 G 30 G 31 24 kW FF 11.4 26.8 35.2 30 kW FF 26.5 35.9 Minimum Burner Pressure (mbar) mbar G 20 G 30 G 31 24 kW FF 30 kW FF Fig. -
Page 31: Replacement Of Parts
SERVICING INSTRUCTIONS To ensure efficient safe operation, it is recommended that the boiler is serviced annually by a competent person. Before starting any servicing work, ensure both the gas and electrical supplies to the boiler are isolated and the boiler is cool. -
Page 32: Access To The Combustion Chamber
22.2 Access to the Combustion Chamber 22.2.1 Removing the combustion chamber front panel 22.2.2 Removing the burner manifold 1. Carry out step 22.1.1; 1. Carry out step 22.1.1 and 22.2.1; 2. Unscrew five self tapping screws “D” to release 2. Unscrew the nut between manifold and gas pipe the combustion chamber front panel and lift clear (see Fig. -
Page 33: Removing The Electrodes
22.2.3 Removing the electrodes 22.2.4 Removing the burner 1. Carry out steps 22.1.1 and 22.2.1; 1. Carry out steps 22.2.1, 22.2.1 and 22.2.2; 2. Unscrew the self tapping screws 2. Remove the two self tapping screws “F” securing the (see Fig. 49) 3. -
Page 34: Removing The Main Heat Exchanger
22.2.5 Removing the main heat exchanger 1. Carry out step 22.1.1, 22.2.1 and 22.2.2; 2. Drain the boiler (only heating circuit); 3. Remove the 2 front clips “G” securing the heat exchanger (see Fig. 55); 4. Remove the NTC clips and overheat clip (see Fig. 56); 5. -
Page 35: Removing The Air Pressure Switch
22.2.6 Removing the air pressure switch 22.2.7 Removing the fan Carry out step 22.1.1; Carry out step 22.1.1; (see Fig. 61) (see Fig. 64) 2. Disconnect the wire connectors 2. Disconnect the wire connectors (see (see 3. Disconnect the pressure pipes noting positions 3. -
Page 36: Servicing And Removal Of The Gas Valve
22.3 Servicing and Removal of the Gas Valve 22.3.1 Removing the spark generator 22.3.2 Removing the gas valve 1. Carry out steps 22.1.1 and 22.1.3; ! Ensure the gas supply to boiler is turned off. MPORTANT 2. Disconnect ignition leads “I” by pulling left (see Fig. 68); 1. -
Page 37: Access To The Water Circuit
22.4 Access to the Water Circuit Important! Before any component is removed, the boiler must be drained of all water. 22.4.1 Drain down DHW : close the DHW inlet tap and open a tap on the installation CH : Close the flow and return isolating valve and open the pressure relief valve. -
Page 38: Removing The Pressure Relief Valve
22.4.4 Removing the pressure relief valve 22.4.6 Removing the pump 1. Carry out step 22.1.1 and 22.1.3; 1. Carry out step 22.1.1; 2. Remove the clip securing the valve (see Fig. 84) and 2. Lower the electrical box cover as in step 22.1.3 pull it toward you;... -
Page 39: Removing The Overheat Thermostat
22.4.7 Removing the domestic expansion vessel 22.4.8 Removing the overheat thermostat 1. Remove the boiler from the wall 1. Remove the casing as in step 22.1.1 ; 2. Remove the two screws “T” (see Fig. 91); 2. Pull off the thermostat connections. Then remove 3. -
Page 40: Access To The Control System
22.5 Access to the Control System 22.5.2 Removing the fuses 22.5.1 Removing the P.C.B.s 1. Carry out steps 22.5.1 ; 2. Remove the fuses “X” (see Fig. 99) 3. Reassemble in reverse order. 1. Isolate electricity; 2. Carry out step 22.1.1; 3. -
Page 41: Incorrect Operation
Incorrect Operation If a fault occurs in the appliance, one or more LEDs (23 Fig. 1) flash according to the fault type listed in the table below. CODE FAULT INFORMATION 30 40 50 60 70 80 H H H H H G Overheating safety feature. -
Page 42: Fault Finding
Fault Finding 24.1 Fault finding guide (flow-chart) It is possible to detect and correct defects by using the standard fault finding diagrams described in this chapter. HIS FAULT FINDING GUIDE IS NOT EXHAUSTIVE PRELIMARY CHECKS MAKE SURE THAT: 1 - There is sufficient water in the system 2 - The gas is turned on 3 - The electrical supply is... - Page 43 IS THE PUMP RUNNING? POWER TO THE PUMP? 1 - Check DHW flowswitch 2 - Check pump cable 3 - Check/replace P.C.B. 1 - Check that the pump is not stuck 2 - Release/replace pump IS THE FAN RUNNING? 1 - Check/replace POWER TO connection cable FAN ?
- Page 44 IS THE AIR PRESSURE SWITCH ACTIVATED? CHECK > ∆ P 1.2 mbar 1 - Check A.P. switch cable ∆P ON TEST 2 - Check/replace A.P. switch PRESSURE 3 - Check/replace P.C.B. INTAKE ≤ ∆ 1 - Check exhaust discharge P 1.2 mbar 2 - Check venturi &...
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Page 45: Electrical Diagrams
FAULTS POSSIBILE CAUSES Drawing D.H.W: THERE STILL - air in secondary heat exchanger When you turn on a tap A PROBLEM? - faulty D.H.W. flow switch burner switches off Drawing D.H.W: - faulty 3-way valve / gravity effect (see radiators heat up in summer mode page 41) Drawing D.H.W: - check temperature probes... -
Page 46: Short Spare Parts List
Short Spare Parts List MX2 24 / MX2 30 SHORT LIST Manf. date Key N° Description G.C N° Manf. Pt. N° Type from FF FF 61010191 OVERHEAT THERMOSTAT 105°C 990686 THERMISTOR TEMP. SENSOR 990436 IGNITION ELECTRODE 61310933 FAN ASSY 24FF 61304721 FAN ASSY 30FF 61313340... - Page 47 NOTES...
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Page 48: Technical Data
Technical Data Model MX2 24 FF MX2 30 FF Appliance Category ............. 2H3+ 2H+3+ Heat output C/H .............Pw 10 to 24 kW 12 to 30 kW Heat output DHW ..........Pw max 24 kW 30 kW DHW flow rates (∆T: 30 K) ..........11.4 I/min.