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Ariston Type C Installation, Servicing And Operating Instructions

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Download this manual See also: Instructions for Installation and Servicing, Instruction and Installation Manual
Installation, Servicing and
Operating Instructions
Type C Boilers
COMBI A 24 MFFI G.C.N: 47-116-44
COMBI A 30 MFFI G.C.N: 47-116-45
LEAVE THESE INSTRUCTIONS
WITH THE END USER
Country of destination: GB/IE

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  • Page 1 Installation, Servicing and Operating Instructions Type C Boilers COMBI A 24 MFFI G.C.N: 47-116-44 COMBI A 30 MFFI G.C.N: 47-116-45 LEAVE THESE INSTRUCTIONS WITH THE END USER Country of destination: GB/IE...

  • Page 2: Customer Care

    The MTS Group as a leading manufacturer of domestic and commercial water heating appliances is committed to providing high quality products and a high quality after sales service. Advice on installation or servicing can also be obtained by contacting the Ariston Technical and Customer Service Departments on:...

  • 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 CLOCKS ........................8 SETTING THE MECHANICAL CLOCK ....................8 SETTING THE DIGITAL CLOCK......................9 INSTALLERS’...

  • Page 4: Introduction

    SERVICING INSTRUCTIONS 18 REPLACEMENT OF PARTS ........................43 18.1 TO GAIN GENERAL ACCESS ........................ 43 18.1.1 Removing the front panel........................43 18.1.2 Lowering the control panel........................43 18.2 ACCESS TO THE COMBUSTION CHAMBER..................44 18.2.1 Removing the combustion chamber front panel ................... 44 18.2.2 Removing the burner ..........................

  • Page 5: User Instructions

    USER INSTRUCTIONS 1. Control Panel Fig. 1 Control panel (Fig. 1) Connecting bracket 16.- Pressure gauge Taps shown in Open position (Fig. 2) 25.- Display 26.- On/off push button and power on indicator light 39.- Gas Service Tap 27.- Yellow indicator - Comfort button 40.- Water Service Tap 28.- Reset push button and red indicator lock-out light...

  • 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 necessary 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 29 and 30 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, see below.

  • Page 8: Setting The Time Clocks

    6. Setting the time clocks (continued) Setting the Mechanical Clock Fig. 3 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). 2.

  • Page 9: Setting The Digital Clock

    6. Setting the time clocks (continued) Setting the Digital Clock Operating the time switch The steps marked with the symbol “ ” are necessary to carry out a switching program. Preparing for Operation Activate the “Res” switch (=RESET) to reset the time switch to its default setting (activate using a pencil or similar pointed instrument).
  • Page 10 6. Setting the time clocks (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.- Condense trap 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 Weight with packaging : 24 kW : 37 kg 30 kW : 40 kg Minimum space required 450mm 450 mini pour entretien 296 (24 kW) 360 (30 kW)

  • Page 13: Hydraulic Data

    9. Hydraulic data The boiler is fitted with an automatic by-pass as standard. The volume of the expansion vessel in a pressurised appliance varies according to: The graphs (Fig. 10) show the development of the pressure available in relation to flow (on exit from the boiler). - the average operating temperature in °C To ensure correct operation, the minimum flow of the - the static height, which is the difference in metres between...

  • Page 14: Installation Requirements

    10. Installation requirements Reference Standards exposed to the free passage of external air at all times and In the United Kingdom, the installation and initial start up of must not be installed in a place likely to cause nuisance. It the boiler must be by a CORGI Registered installer in must not be allowed to discharge into another room or space accordance with the installation standards currently in effect,...
  • Page 15 10. Installation requirements (continued) Electrical Supply The use of a corrosion inhibitor in the system is All electrical work carried out must be in accordance with all recommended to prevent corrosion (sludge) damaging the current local Building Regulations and British Standards. boiler and system;...
  • Page 16 10. Installation requirements (continued) 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 17: 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 18 11. Installing the boiler (continued) Fig. 12 Fig. 13 Fig. 14 Fig. 15...

  • Page 19: 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 20: 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 21 Clamp Screws Seal Fig. 19 Fig. 20...

  • Page 22: Fitting The 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 23: 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 24 12. Connecting the flue (continued) 123.5 Fig. 25 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 25 12. Connecting the flue (continued) RAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY Fig. 27...

  • Page 26: Electrical Connections

    13. Electrical connections Making the Electrical Connections Lower the electrical box to gain access to the elec- trical connections. Push in the tabs P (Fig. 28) on either side of the boiler and pivot the box forward. Remove the PCB cover (see Section 18.4 - page 51).
  • Page 27 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. 30). 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 28: Fitting The Mechanical And Digital Time Clocks

    13. Electrical connections (continued) 13.1 Fitting the Digital Programmer The boiler is supplied with a factory fitted mechanical time clock, to fit the optional digital programmer it is necessary to proceed as follows; (this should only be carried out by a competent engineer) Isolate the electrical supply to the appliance;...

  • Page 29: Commissioning And Testing

    14. Commissioning and testing 14.1 Initial preparation ATER REATMENT MTS (GB) Limited support the initiative. In The boiler is equipped with a stainless steel heat exchanger. Sections 24 and 25 (pages 60 and 61) of this manual the Commissioning Checklist and Service Interval The detailed recommendations for water treatment are given Record can be found.

  • Page 30: Adjusting The Co

    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 1. Remove the casing panel as described in Section 18.1 necessary to insert a diaphragm and restrictor between the (page 43);...

  • Page 31: External Sensor Set-Up

    14.7 External sensor set-up (where fitted) When using an outdoor sensor, the microprocessor- controlled PCB will select the most suitable flow temperature, taking into account the external temperature and the type of system. The microprocessor is capable of doing this because it is possible to establish a link between the external temperature and the flow temperature of the Central Heating system water.

  • Page 32: Operational Checks

    14. Commissioning and testing (continued) 14.10 Operational checks 14.11 Instructing the end user 1. The system must be visually checked for soundness; 1. Hand over these instructions and explain how to use the time clock and room thermostat and explain how to 2.

  • Page 33: Fitting The Casing

    14. Commissioning and testing (continued) 24 kW 30 kW 35 kW 22.4 32.5 20.8 19.2 27.5 17.6 22.5 14.4 12.8 17.5 11.2 12.5 9 10 Fig. 39 Steps (Value P min - P max - Menu 4) 15. Fitting the casing Fitting the casing Remove the protective film on the casing;...

  • Page 34: 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 temperatures 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 35: 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 36: Adjustments And Settings

    17. Adjustments and settings The boiler is delivered with pre-set values described in menus 3 and 4. 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 Fig.
  • Page 37 ACTION CONFIGURATION DISPLAY Menu - 1 - Default register 5 ” Record of the last 10 faults Section Digit 1 Digit 2 Digit 3 and 4 code from 01 to 99 Last fault occurred Last but one fault occurred code from 01 to 99 code from 01 to 99 x times code from 01 to 99...
  • Page 38 ACTION CONFIGURATION DISPLAY Menu - 3 - Boiler options once Section Digit 1 Digit 2 Digit 3 and 4 0 : permanent DHW Comfort mode 1 : 30 mins x times 0 : no DHW thermostatic kit fitted to boiler? (limits DHW temp to 60°C) 1 : yes 0 : central heating and...
  • Page 39 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 : Low speed 0 to 5 min by step Pump post circulation duration 0.5 min...
  • Page 40 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 41 ACTION CONFIGURATION DISPLAY Menu - 6 - Automatic heating regulation once Section Digit 1 Digit 2 Digit 3 and 4 0 : External sensor fitted Regulation on 1 : External sensor not fitted x times 0 : External sensor not fitted Heating setting in automatic/manual mode 1 : External sensor fitted...
  • Page 42 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 43: 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 54) 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 44: Access To The Combustion Chamber

    18.2 Access to the Combustion Chamber 18.2.1 Removing the air gas assembly 1. Isolate the gas supply to the boiler; 4. Disconnect the detection electrode 5. Remove the earth cable from the 2. Carry out step 18.1.1; cable (Fig. 49); ignition electrode (Fig.

  • Page 45: Removing The Burner

    18.2.2 Removing the burner 1. Carry out step 18.1.1 and 18.2.1; 3. Slide the burner out from the 4. Reassemble in reverse order and 2. Remove the 3 screws F from the front, taking care not to damage the checking all seals are undamaged air/gas manifold (Fig.

  • Page 46: 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. 68); 18.2.1 (Fig.

  • Page 47: Removing The Heat Exchanger

    18.2.7 Removing the heat exchanger 3. Unscrew the three bolts M from the 4. Remove the flow and return pipes 1. Carry out step 18.1.1; main heat exchanger (Fig. 74); and the condense drain pipe from 2. Remove the air gas manifiold as in the heat exchanger.

  • Page 48: 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 49: Removing The Secondary Heat Exchanger

    18.3.4 Removing the secondary heat exchanger 4. Unscrew the two fixing screws R and pull the heat 1. Carry out step 18.1.1 and 18.1.2; exchanger toward you (see Figs. 89 & 90); 2. Remove the 3 way valve motor as in step 18.3.2; 5.

  • Page 50: 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. 95) and pull it toward you; 3. Reassemble in reverse order; take care to ensure the valve is in the correct position; Fig.

  • Page 51: Removing The Dhw Flow Switch

    18.3.10 Removing the pressure gauge 18.3.11 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 52: Removing The Fuses

    6. To remove the display PCB, remove the two screw 8. To remove the main PCB disconnect all electrical W4 and lift the PCB out (see Fig. 103); connections and remove the two screws W5 (see Fig. 7. Reassemble in reverse order; 104);...

  • Page 53: 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 28.

  • Page 54: Maintenance Instructions

    19. Incorrect function (continued) Fault Cause Solution Check gas, water and electrical The boiler doesn’t start No gas, no water or no electricity supplies, 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 Press the reset button 28 (Fig.

  • Page 55: Operational Test

    20. Maintenance Instructions (continued) Cleaning the water side Use detergents that dissolve CaCO3. Leave to act for a short time and then rinse. Make sure that the detergent does not remain inside the exchanger. 20.3 Operational test Unscrew the lower part of the condensate trap and clean it. Fill it with water and replace.

  • Page 56: Short Spares List

    21. Short spares list Manf. date Key N° Description G.C N° Manf. Pt. N° Type from HEAT EXCHANGER 61313760 HEAT EXCHANGER 24KW 61313763 HEAT EXCHANGER 30KW FAN ASSEMBLY 990686 TEMPERATURE PROBE 61306030 GASKET D:129.4 GAS SECTION 61307584 GAS SECTION ASSY 61310129 GAS SECTION ASSY 61314434...

  • Page 57: Notes

    22. Notes...

  • Page 58: Technical Data

    23. Technical data Model COMBI A 24 MFFI CE certificate 1312-BP-4083 Performance category **** NoX class Category II2H3P Central Heating input (min/max) 7.5 to 25 Central Heating output (min/max) 80°C/60°C 7 to 24 Central Heating output (max) 50°C/30°C Domestic Hot Water input (max) Domestic Hot Water output (max) SEDBUK rating / SAP efficiency Band / %...
  • Page 59 Model COMBI A 30 MFFI CE certificate 1312-BP-4084 Performance category **** NoX class Category II2H3P Central Heating input (min/max) 9.4 to 30 Central Heating output (min/max) 80°C/60°C 9 to 29 Central Heating output (max) 50°C/30°C Domestic Hot Water input (max) Domestic Hot Water output (max) A / 90.2 SEDBUK rating / SAP efficiency...

  • Page 60: Benchmark Commissioning Checklist

    24. Benchmark Commissioning Checklist...

  • Page 61: Service Interval Record

    25. Service Interval Record...

  • Page 64: Terms And Conditions Of Guarantee

    ERMS AND ONDITIONS OF UARANTEE Please read these terms and conditions which are in On the 12 month anniversary of the appliance addition to any terms and conditions detailed in this book installation, you must have it serviced to continue any or any registration card supplied with your appliance.

This manual is also suitable for:

Combi a 24 mffiCombi a 30 mffi

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