Ariston Combi A 24 MFFi Installation And Servicing Instructions
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Ariston Combi A 24 MFFi Installation And Servicing Instructions

Ariston Combi A 24 MFFi Installation And Servicing Instructions

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C C O O M M B B I I A A
S S E E R R I I E E S S
Country of destination
Supplied By www.heating spares.co Tel. 0161 620 6677
12
9
3
6
GB
IE
Combi A 24 MFFi
Combi A 30 MFFi
Installation and
Servicing
Instructions
Type C Boilers
G.C.N:
47-116-44 (24 kW)
G.C.N:
47-116-45 (30 kW)
LEAVE THESE
INSTRUCTIONS WITH THE
END-USER
MODE
MAN
AUTO
TEMP

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  • Page 1: Installation And Servicing

    Combi A 24 MFFi C C O O M M B B I I A A Combi A 30 MFFi S S E E R R I I E E S S Installation and Servicing Instructions Type C Boilers G.C.N: 47-116-44 (24 kW) G.C.N:...

  • Page 2: Customer Care

    These instructions are suitable for the Combi A boilers : Do not forget the Log Book! MTS 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. 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.

  • Page 3: Table Of Contents

    Contents CUSTOMER CARE Page Guarantee ................................2 Statutory Requirements ............................2 Contents ................................3 INTRODUCTION ..............................4 USER INSTRUCTIONS ............................5 1 CONTROL PANEL............................5 2 HOW TO USE ..............................6 3 MAINTENANCE ...............................7 4 GUARANTEE..............................7 5 PRACTICAL INFORMATION...........................7 6 SETTING THE TIME CLOCK ..........................8 SETTING THE MECHANICAL CLOCK ....................8 SETTING THE DIGITAL CLOCK......................9 INSTALLERS’...

  • Page 4: Introduction

    SERVICING INSTRUCTIONS 18 REPLACEMENT OF PARTS .........................42 18.1 To Gain General Access........................42 18.1.1 Removing the front panel........................42 18.1.2 Lowering the control panel........................42 18.2 Access to the Combustion Chamber .....................43 18.2.1 Removing the combustion chamber front panel ..................43 18.2.2 Removing the burner ..........................44 18.2.3 Removing the detection electrode ......................44 18.2.4 Removing the ignition electrode......................44 18.2.5 Removing the fan...........................45...

  • Page 5: User Instructions

    USER INSTRUCTIONS 1. Control panel Fig. 1 Control panel (Fig. 1) Connecting bracket Taps shown in Open position (Fig. 2) 16.- Pressure gauge 26.- Display 39 : Gas service tap 27.- On/off push button and power on indicator light 40 : Water service tap 28.- Programming button - domestic hot water temperature holding function -yellow indicator light 41 : Central heating flow isolating valve...

  • Page 6: How To Use

    2. How to use Switching on and filling instructions 1. Check the pressure in the central heating system is above 0.7 bar and below 1.5 bar with the pressure gauge 16 (fig.1), should it be neccessary to re-pressurise the system,ensure the filling loop 45 (fig. 2) is attached, open the filling taps 43 & 44, the pressure gauge will now start to rise, once the pressure reads 1.0 bar, close the filling taps and disconnect the filling loop.

  • Page 7: Maintenance

    Stand-by mode Turn the control knobs 30 and 31 to the OFF position to deactivate the DHW and Heating. Leave the ON/OFF button On with the green light on. During the stand-by mode the display indicates the time, anti-seizing and anti- freezing will be active.

  • Page 8: Setting The Time Clock

    6. Setting the time clock Setting the mechanical clock Fig. 3 12 12 Fig. 4 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).

  • Page 9: Setting The Digital Clock

    6. Setting the time clock (continued) Setting the Digital Clock Manual switch Summer and winter time setting Reset Enter Enter switching the hours times Week- days flash Imput Enter time minutes Enter weekday/s Automatic Manual Continuous Operation Operation Operation = ON = ON = Continuously ON = OFF...
  • Page 10 6. Setting the time clock (continued) Entering the switching times You have 20 memory Iocations available. Each switching time takes up one memory location. Keep pressing the “Prog” button until a free memory location is shown in the display “– –:– –”. Programme ON or OFF with the “...

  • Page 11: Installers' Instructions

    INSTALLER INSTRUCTIONS 7. Description 1.- Steel chassis complete with expansion vessel 2.- Sealed chamber 3.- Burner and heat exchanger assembly 4.- Air / gas connection 5.- 24 V modulating fan 6.- Gas valve 7.- Ignition electrode 8.- Ionisation probe 9.- Ignitor 10.- Combustion products manifold 11.- Siphon 12.- Silencer...

  • Page 12: Dimensions

    8. Dimensions All dimensions in mm Safety valve C/H and condensate Heating flow D.H.W. outlet Gas supply Cold water inlet Heating return With packaging : 24 kW : 37 kg 30 kW : 40 kg 172,5 121,5 J K L M N minimum space required 450 450 mini pour entretien 296 (24 kW)

  • Page 13: Installation Requirements

    10. Installation requirements Reference Standards must not be installed in a place likely to cause nuisance. It In the United Kingdom, the installation and initial start up of must not be allowed to discharge into another room or space the boiler must be by a CORGI Registered installer in such as an outhouse or closed lean-to.
  • Page 14 10. Installation requirements (continued) Electrical Supply The use of a corrosion inhibitor in the system such as Fernox The appliance requires an earthed 230V - 50 Hz supply and MB-1, BetzDeaborn Sentinel X100 or Fernox System must be in accordance with current I.E.E. It must also be Inhibitor is recommended to prevent corrosion (sludge) possible to be able to completely isolate the appliance damaging the boiler and system;...
  • Page 15 10. Installation requirements (continued) into a suitable acid resistant pipe - e.g. plastic waste or giving a minimum water seal of 75mm and an air break overflow pipe. The condensate discharge pipe must have a must be incorporated in the pipe run, as above. minimum diameter of 22mm, must have a continuous fall and iii) Terminating into a gully, below the grid level but above preferably be installed and terminated to prevent freezing.

  • Page 16: Installing The Boiler

    11. Installing the boiler Please check that you are familiar with the installation requirements before commencing work (Section 10). The installation accessories described in the following list are included in the boiler packaging: - Hanging bracket - A paper template (showing the dimensions of the boiler with 5 mm side clearances) - Connection tails and valves - Screws and washers - Connection washers...
  • Page 17 11. Installing the boiler (continued) Fig. 12 Fig. 13 Fig. 14 Fig. 15 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 18: Connecting The Flue

    12. Connecting the Flue The boiler should only be installed with a flue system supplied by MTS (GB) Limited. 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. The boiler is supplied ready for connection to a concentric flue system.

  • Page 19: Fitting The Coaxial Flue (Ø 60/100 Horizontal)

    12.1 Fitting the coaxial flue (Ø 60/100 Horizontal) ONTENTS (60mm) ILICONE LBOW & E EALS NTERNAL XTERNAL - 60/100) IPE INCLUDING ERMINAL METRE LAMP CREWS 1x Seal Once the boiler has been positioned on the wall, insert the elbow into the socket and rotate to the required position. : It is NOTE possible to rotate the elbow 360...
  • Page 20 Fig. 20 Fig. 21 Fig. 22 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 21: Fitting Vertical Flue (Ø 60 / 100)

    12.3 Fitting the Coaxial Flue (Ø 60 / 100 Vertical) EE PAGE FOR MAXIMUM AND MINIMUM FLUE RUNS 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 22: Fitting The Twin Flue (Ø 80 / 80)

    12. Connecting the flue (continued) 12.4 Fitting the twin pipe (Ø80/80) EE PAGE FOR MAXIMUM AND MINIMUM FLUE RUNS ABLE 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 23 12. Connecting the flue (continued) 123,5 Fig. 27 In the event that twin flue pipes are used, and the boiler has a side clearance of less than 60mm from the wall, it is necessary to cut a larger diameter hole for the flue pipe, this should be ø100 mm, this will then allow for easier assembly of the air intake elbow and the tube outside the wall (see Fig.
  • Page 24 12. 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. 29 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 25: Electrical Connections

    13. Electrical connections Making the Electrical Connections Hinge down the electrical box to gain access to the electrical connections. Push in the tabs P (Fig. 30) on either side of the boiler and pivot the box for- ward. Remove the PCB cover (see Section 18.4 - page 50).
  • Page 26 13. Electrical connections (continued) If a remote time clock is to be fitted, using a volt-free switching time clock, remove the link wire and connect the switching wires from the time clock following points above (see also Diagram B Fig. 32). If using an external time clock and room thermostat, remove the link wire and connect in series as above (see also Diagram C Fig.

  • Page 27: Fitting Digital Time Clock

    13. Electrical connections (continued) 13.1 Fitting the Digital Time Clocks To fit the digital time clock it is necessary to proceed as follows; (this should only be carried out by a competent engineer) Isolate the electrical supply to the appliance; Remove the front panel as described in Section 18.1.1;...

  • Page 28: Commissioning And Testing

    14. Commissioning and testing 14.1 Initial preparation The detailed recommendations for water treatment are given MTS (GB) Limited support the initiative. In in BS 7593:1992 (Treatment of water in domestic hot water Sections 24 and 25 (pages 60 and 61) of this manual the central heating systems);...

  • Page 29: Adjusting The Co2

    14. Commissioning and testing (continued) 14.4 Gas Conversion 14.3 Adjusting the CO To convert from Natural Gas (G20) to LPG (G31), it is 2. Make sure that all radiator valves are open; necessary to insert a diaphragm and restrictor between the 3.

  • Page 30: External Sensor Set-Up

    14.7 External sensor and ambient sensor set-up (where fitted) N.B. To ensure that these parameters are set correctly, consult the "thermo-regulation help" document enclosed with the documentation folder. 14.8 Completion For the Republic of Ireland it is necessary to complete a “Declaration of Conformity”...

  • Page 31: Instructing The End User

    14. Commissioning and testing (continued) 14.10 Instructing the end user 1. Hand over these instructions and explain how to use the time clock and room thermostat (if fitted) and explain how to register the guarantee; 2. Show the end user how to switch the appliance off quickly, and indicate the position of the electric supply isolator;...

  • Page 32: Fitting The Casing

    15. Fitting the casing Fitting the casing Remove the protective film on the casing: - Locate the lower clips into the slots in the chassis - Engage hooks N on the casing in notches R on the side panels M operation (Fig. 42) - Fit the top of the panel in place - Close the panel mounting clamps (Fig.

  • Page 33: Sequence Of Operation

    16. Sequence of operation 16.1 Central Heating Mode Activation of the time clock and/or room thermostat starts the boiler. The display panel indicates the flow temperature s in central heating as illustrated below: Central heating mode ON Room thermostat contact ON With the boiler in rest, the diverter valve is in the domestic hot water position, activation of the central heating changes the position of the motorised valve head, moving the diverter valve into the central heating position.

  • Page 34: Domestic Hot Water Mode

    16. Sequence of operation 16.2 Domestic Hot Water Mode The Domestic Hot Water (DHW) production always has priority over the Central Heating (CH) mode. When a hot tap is turned on, the DHW flow switch is activated. The minimum DHW flow rate is 2 l/min. If the diverter valve is in the CH position it will motor into the DHW position and the boiler will start.

  • Page 35: Adjustments And Settings

    17. Adjustments and settings The boiler is delivered with pre-set values described in menus 3 and 4. 12 12 All settings must only be changed by the installer or a qualified person. To gain access to the setting buttons please, open the front control panel cover P.
  • Page 36 ACTION CONFIGURATION DISPLAY Menu - 1 - Default register 5 ” Record of the last 10 faults Section Digit 1 Digit 2 Digit 3 and 4 Last fault occured code from 01 to 99 Last but one fault occurred code from 01 to 99 code from 01 to 99 x times Last fault occurred before the previous one...
  • Page 37 ACTION CONFIGURATION DISPLAY Menu - 3 - Boiler options once Rubrique Elément 1 Elément 2 Elément 3 et 4 Inactive 0 : non DHW thermostatic kit fitted to boiler? x times (fix DHW temp to 65°C) 1 : oui 0: on heating and reheating of exchanger Optional programmer action 1: on reheating of...
  • Page 38 ACTION CONFIGURATION DISPLAY Menu - 4 - Boiler settings once Section Digit 1 Digit 2 Digit 3 and 4 0 : no Stop pump after burner stops 1 : yes x times 0 : High speed Pump speed 1 : Adaptive 0 to 5 min by step Pump post circulation duration 0.5 min...
  • Page 39 ACTION CONFIGURATION DISPLAY Menu - 5 - Combustion rate control mode (test mode) Effect Display once Combustion rate control mode OFF Combustion rate control mode ON The main exchanger temperature appears on the display. The digit - on the display shows the gas output level.
  • Page 40 ACTION CONFIGURATION DISPLAY Menu - 6 - Thermo-regulation settings once Section Digit 1 Digit 2 Digit 3 and 4 0: Heating setting can be adjusted by the user 1: Variable heating setting depending on the external temperature x times 2: Variable heating setting Type of control depending on the room temperature (Clima Manager)*...
  • Page 41 17. Adjustments and settings (continued) CH anti cycling delay setting : If you would like to change the setting of CH anti cycling delay, if you want 3 min, proceed as follows: HE FACTORY SETTING IS SECONDS AND THE FOLLOWING EXPLANATION REFER TO MENU SECTION Display 5 ”...

  • Page 42: Servicing Instructions

    SERVICING INSTRUCTIONS To ensure efficient safe operation, it is recommended that the boiler is serviced annually by a competent person, refer to Section 20 (page 53) for the Servicing Schedule. Before starting any servicing work, ensure both the gas and electrical supplies to the boiler are isolated and the boiler is cool.

  • Page 43: Access To The Combustion Chamber

    18.2 Access to the Combustion Chamber 18.2.1 Removing the air gas assembly 5. Remove the earth cable from the ignition electrode (Fig. 51), and 1. Isolate the gas supply to the boiler; 4. Disconnect the detection electrode remove the ignition electrode cable 2.

  • Page 44: Removing The Burner

    18.2.2 Removing the burner Do not remove the burner unless absoluly necessary. 4. Reassemble in reverse order and 1. Carry out step 18.1.1 and 18.2.1 3. Slide the burner out from the front, (without removing the 4 nuts D); checking all seals are undamaged taking care not to damage the 2.

  • Page 45: Removing The Fan

    18.2.5 Removing the fan 1. Carry out step 18.1.1; 3. Unscrew the two screws from the 4. Unscrew the three screws K on the 2. Remove the air gas manifiold as in venturi J and remove with the gas air/gas pipe and remove (Fig. 69); step 18.2.1 (Fig.

  • Page 46: Removing The Heat Exchanger

    18.2.7 Removing the heat exchanger 1. Carry out step 18.1.1; 3. Remove the flow pipe clip and 4. Remove the flow and return pipes 2. Remove the air gas manifiold as in unscrew the pump nut (Fig. 75a & and the condense drain pipe from 18.2.1 (Fig.

  • Page 47: Access To The Water Circuit

    18.3 Access to the Water Circuit Important! Before any component is removed, the boiler must be drained of all water. 18.3.1 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 48: Removing The Secondary Heat Exchanger

    18.3.4 Removing the secondary heat exchanger 1. Carry out step 18.1.1 and 18.1.2; 5. Unscrew the two fixing screws R and pull the heat 2. Remove the 3 way valve motor as in step 18.3.2; exchanger toward you (see Figs. 90 & 91); 3.

  • Page 49: Removing The Pressure Relief Valve

    18.3.6 Removing the pressure relief valve 1. Carry out step 18.1.1 and 18.3.1; 2. Remove the clip securing the valve (see Fig. 96) and pull it toward you; 3. Reassemble in reverse order; take care to ensure the valve is in the correct position; Fig.

  • Page 50: Removing The Pressure Gauge

    18.3.11 Removing the pressure gauge 18.3.12 Removing the pressure switch 1. Carry out steps 18.1.1 and 18.3.1; 1. Remove the casing as in step 18.1.1 and drain down as 2. Remove the pressure gauge by releasing the two clips V in step 18.3.1;...

  • Page 51: Removing The Fuses

    4. Remove the two screws W3 from the front control 5. Remove all electrical connections from the display PCB panel and lower the front control panel (see Fig. 107); (see Fig. 108); Fig. 107 Fig. 108 6. To remove the display PCB, remove the two screw 8.

  • Page 52: Incorrect Function

    19. Incorrect function In case of problem, or when the boiler has displayed an error code, the display flashes 2 digits. Please refer to the table below to diagnose the fault. For faults 01 and 03, A appears on the display, the boiler is locked and the reset button illuminates (28). To reset the boiler press the reset button 29.

  • Page 53: Maintenance Instructions

    19. Incorrect function (continued) Fault Cause Solution Control gas, water and electrical No gas, no water or no The boiler doesn’t start electricity supply, fuses… Air in the gas pipe Purge the air from the gas pipe Room thermostat switched off Turn the room thermostat up Wait for a few minutes Overheat lockout (A01)

  • Page 54: Short Spares List

    21. Short spares list 24 30 Manf. date Key N Description Type Manf. Pt. N Other from FF FF 0100 BURNER ASSEMBLY 0101 60000292 BURNER 24KW 60000293 BURNER 30KW 0103 60000295 SOUPAPE 0110 61317432 IGNITION ELECTRODE 0111 60000312 IONIZATION ELECTRODE 0112 61314753 GASKET D:85-66.5-2.5...

  • Page 55: Technical Data

    22. Technical data Model Combi A 24 MFFi CE certificate 1312-BP-4083 Performance category **** NoX class Category II2H3P Heating output 80°C/60°C 5 to 21 Heating output 50°C/30°C 6 to 23 Variable hot water power Pn max 25,1 Nominal gas flow rate (15 °C-1013 mbar) Central Heating &...
  • Page 56 Model Combi A 30 MFFi CE certificate 1312-BP-4084 Performance category **** NoX class Category II2H3P Heating output 80°C/60°C 6 to 27 Heating output 50°C/30°C 7 to 29 30,2 Variable hot water power Pn max Nominal gas flow rate (15 °C-1013 mbar) Central Heating &...

  • Page 57: Benchmark Commissioning Checklist

    23. Benchmark Commissioning Checklist BENCHMARK No. G A S B O I L E R C O M M I S S I O N I N G C H E C K L I S T BOILER SERIAL No. NOTIFICATION No.

  • Page 58: Service Interval Record

    24. Service Interval Record S E R V I C E I N T E R VA L R E C O R D It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below. Service Provider.

  • Page 59: Notes

    MTS are continuously improving their products and therefore reserve the right to change specifications without prior notice and accepts no liability for any errors or omission in the information contained in this document. Manufacturer: MTS (SA) - France Commercial subsidiary: M T S (GB) Limited MTS Building Hughenden Avenue...

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Combi a 30 mffi

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