Ariston Clas 24 FF Installation And Servicing Instructions
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Ariston Clas 24 FF Installation And Servicing Instructions

Ariston wall hung gas boilers type c
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  • Page 2: Table Of Contents

    INDEX General Information ....................3 Maintenance ..................42 General Information ...................... 3 General comments ......................42 Control Panel........................4 Operational test ......................42 Overall wiew ........................5 Draining procedures ....................42 Technical Information ....................6 Draining the D.H.W. system and indirect cylinder ..........42 Draining the System ....................43 Installation ....................8 Completion ........................43 Reference Standards .....................

  • Page 3: General Information

    general information This manual is an integral and essential part of the product. It General Instructions should be kept with the appliance so that it can be consulted by the user and our authorised personnel. Read the instructions and recommendations in these Installation and Servicing Instructions carefully to ensure proper installation, Please carefully read the instructions and notices about the unit use and maintenance of the appliance.

  • Page 4: Control Panel

    CLAS 24 FF CLAS 30 FF Fig. 1 Legend 10. Domestic Hot Water adjustment knob (COMBI models) Display 11. Time clock (optional) RESET button 12. ON/OFF Switch Red LED (illuminated = boiler lockout) 13. “COMFORT” Function L.E.D (COMBI models) Heating System Pressure Gauge Heating only L.E.D (SYSTEM models)

  • Page 5: Overall Wiew

    general information Overall wiew CLAS 24/30 FF CLAS SYSTEM 21/28 FF 14 15 Fig. 3 Fig. 4 Legend Flue connector Air pressure switch Condensate trap Main Heat Exchanger Overheat thermostat Flow temperature probe Burner Ignition electrodes Gas valve 10. Spark generator 11.

  • Page 6: Technical Information

    Technical Information Model Name CLAS 24 FF CLAS 30 FF CE certifi cation (pin) 1312BR4793 1312BR4793 Boiler type C12-C32-C42-C52-B22-B32 Max/min nominal heat input(Hi) 25.8 / 11.0 30.0 / 13.0 Max/min nominal heat input (Hs) 28.7 / 12.2 33.3 / 14.4 Max/min nominal heat input for hot water (Hi) 27 / 11.0...
  • Page 7 general information Model Name CLAS SYSTEM CLAS SYSTEM 21 FF 28 FF CE certifi cation (pin) 1312BR4793 1312BR4793 Boiler type C12-C32-C42-C52-B22-B32 Max/min nominal heat input(Hi) 25.8 / 11.0 30.0 / 13.0 Max/min nominal heat input (Hs) 28.7 / 12.2 33.3 / 14.4 Max/min nominal heat input for hot water (Hi) 27 / 11.0 31.3 / 13.0...

  • Page 8: Installation

    installation Reference Standards Siting the Appliance The technical information and instructions provided herein below are The appliance may be installed in any room or indoor area, although intended for the installer / Servicing Technician so that the unit may particular attention is drawn to the requirements of the current I.E.E. be installed and serviced correctly and safely.

  • Page 9: Overall Dimensions

    installation CLAS 24/30 FF CLAS SYSTEM 21/28 FF CLAS SYSTEM 21/28 FF 67 67 Fig. 5 Overall Dimensions Legend: A = Central Heating Flow (22mm nut & olive) B = Domestic Hot Water Outlet (15mm nut & olive) C = Gas Inlet (15mm) D = Domestic Cold Water Inlet (15mm nut &...

  • Page 10: Monting The Appliance

    installation Mounting the Appliance ø80 ø100 After removing the boiler from its packaging, remove the template from the box. Note: Pay particular attention to any test water that may spill from the appliance. ø80 ø80 Place the template in the position the appliance is to be mounted and after ensuring it is hanging squarely, use it to drill the holes for the hanging bracket and fl...

  • Page 11: Gas Connection

    installation Gas Connection The local gas region contractor connects the gas meter to the service pipe. If the gas supply for the boiler serves other appliances ensure that an adequate supply is available both to the boiler and the other appliances when they are in use at the same time.

  • Page 12: Safety Valve Discharge

    installation Safety Valve Discharge: The discharge should terminate facing downward on the exterior of the building in a position where discharging (possibly boiling water & steam) will not create danger or nuisance, but in an easily visible position, and not cause damage to electrical components and wiring.

  • Page 13: Flue Connection

    installation Flue Connections Flue System The provision for satisfactory fl ue termination must be made in accordance with BS 5440-1. The appliance must be installed so that the fl ue terminal is exposed to outside air. The terminal must not discharge into another room or space such as an outhouse or lean-to.

  • Page 14: Fitting The Coaxial Fl Ue

    installation Fitting the Coaxial Flue (Horizontal) Fig. 12 (For Vertical Flue and Twin Pipe Instructions see pages 13 and 14) Contents: 1x Silicone O-Ring (60mm) 1x Elbow (90 2x Wall Seals (Internal & External) 1x Flue Pipe including Terminal (1 metre - 60/100) 2x Flue Clamps 4x Screws 2x Foam Seals...

  • Page 15: Fitting 80/125 Flue

    installation Fitting 80/125 Flue (Horizontal and Vertical) WARNING (For Coaxial Vertical Flue Instructions see page 13) If the chosen fl ue length requires the use of the restrictor, it is already fi tted inside the fl ue gas collar. In the event of an in- Should the fl...
  • Page 16 installation Fitting the Coaxial Flue (Vertical) Fig. 19 (For Twin Pipe Instructions see page 17) Contents: 1x Silicone O-Ring (60mm) 1x Elbow (90o) 2x Wall Seals (Internal & External) 1x Aluminium Flue Pipe including Terminal (Telescopic - 60/100) 2x Flue Clamps 8x Screws 2x Seals The vertical fl...

  • Page 17: Fitting The Fl Ue (Twin Pipe)

    installation WARNING When utilising the vertical fl ue system, action must be taken to If the chosen fl ue length requires the use of the restrictor, it is ensure that the fl ue is supported adequately to prevent the weight already fi tted inside the fl ue gas collar.
  • Page 18 installation Note: Vertical twin fl ue installations must have a trap on the exhaust. MTS supply a suitable condense trap Part No. 3318026 and recommend that this be used in the event that the fl ue may form condense. When siting the twin fl ue pipe, the air intake and exhaust terminals must terminate on the same wall, the centres of the terminals must be a minimum of 280 mm apart and the air intake must not be sited above the exhaust terminal (refer to Fig.
  • Page 19 installation Fig. 26 Note: Drawings are indicative of fl ueing options only. AIR INTAKE MUST NOT BE FITTED ABOVE THE EXHAUST AIR INTAKE EXHAUST AIR INTAKE Fig. 27...
  • Page 20 TABLE A MAXIMUM EXTENSION EXHAUSTAIR (m) Diameter CLAS 24 FF CLAS 30 FF Exhaust Type of pipe CLAS SYSTEM 21 FF CLAS SYSTEM 28 FF (mm) Do not use Do not use Restrictor ø 44 Restrictor ø 44 Restrictor...

  • Page 21: Electrical Connection

    installation WARNING Peripheral unit connection Before performing any work on the boiler, fi rst To access peripheral unit connections carry out the following steps: disconnect it from the electrical power supply using - Disconnect the boiler from the power supply - Remove the casing by unhooking it from the instrument panel the external bipolar switch.

  • Page 22: Room Thermostat Connection

    installation Room thermostat connection Introduce the outdoor sensor wires - Introduce the thermostat wire - Loosen the cable clamp using a screwdriver and insert the - Loosen the cable clamp using a screwdriver and insert the wires wires leading from the outdoor sensor one at a time. leading from the room thermostat one at a time.

  • Page 23: Wiring Diagram For Connection To An Open Vented Cylinder

    installation IRING IAGRAM ONNECTION ENTED YLINDER...

  • Page 24: Wiring Diagram For Connection To An Mts Vented Cylinder

    installation MTS U IRING IAGRAM ONNECTION NVENTED YLINDER...

  • Page 25: Electrical Diagram

    installation Electrical diagram For increased safety, ask a qualifi ed technician to perform a thorough check of the electrical system. The manufacturer is not responsible for any damage caused by the lack of a suitable earthing system or by the malfunctioning of the electricity mains supply.
  • Page 26 installation Fig. 33...

  • Page 27: Water Circuit Diagram

    installation Water Circuit Diagram Fig. 34 Fig. 35 Legend: 1. Fan A Central Heating Flow 2. Main Heat Exchanger B Domestic Hot Water Outlet 3. Overheat Thermostat C Gas Inlet 4. Central Heating Flow Temperature Probe D Cold Water Inlet 5.

  • Page 28: Commissioning

    commissioning Initial Preparation damaging the boiler and system. MTS (GB) Limited support the initiative. Within the Failure to carry out this procedure may invalidate the appliance information pack you will fi nd a copy of the logbook. warranty. It is important that this is completed in the presence of your customer, they are shown how to use it, and it is signed by them.

  • Page 29: Checking The Gas Settings

    commissioning Checking the gas settings Remove the front casing and proceed as described below. Supply working pressure check 1. Loosen screw “1” (Fig. a) and attach the pressure gauge connection pipe onto the test nipple. 2. Switch the boiler on at maximum power, enabling the “fl ue sweep”...

  • Page 30: Checking The Maximum C.h. Power

    commissioning Maximum Heating Power adjustment Accessing the settings and adjustment menus The maximum heating power can be adjusted to between the Boiler parameters menu 2 - maximum power (shown on the display as “99”, ) allowed by the submenu 3 - parameter 1 boiler and the minimum power (shown on the display as “0”, ).

  • Page 31: Gas Table

    Parameter 2 3 1 mbar 11,8 14,9 18,4 24,4 28,6 33,2 Parameter 2 3 1 CLAS 24 FF CLAS 30 FF CLAS 21 FF SYSTEM CLAS 28 FF SYSTEM Gas Table (propane) (propane lower Wobbe index (15°C, 1013 mbar) (MJ/m3) 45.67 80.58...

  • Page 32: Auto Function

    commissioning Auto function This is a function which enables the boiler to automatically adapt its operation routine (the temperature of the radiators) in line with the outdoor conditions, in order to achieve and maintain the requested room temperature conditions. Depending on the peripheral units connected and the number of zones controlled, the boiler adjusts its fl...

  • Page 33: Boiler Protection Devices

    boiler protection devices Boiler protection devices Table summarising error codes The boiler is protected from malfunctioning by means of internal checks performed by the electronic microprocessor P.C.B., which Central Heating circuit stops the boiler from operating if necessary. Display Description In the event of the boiler being shut off...

  • Page 34: Anti-Frost Device

    boiler protection devices Anti-frost Device. The anti-frost function acts on the central heating fl ow temperatu- Flue test mode re probe, independently from other regulations, when the electri- The P.C.B. enables the boiler to be forced to its maximum or cal supply is turned on.

  • Page 35: Settings - Adjustment - Problem Identifi Cation Menus

    settings - adjustment - problem identifi cation menus Accessing the settings - adjustment - problem identifi cation The parameters relating to each individual menu are listed in the following pages. menus The various parameters can be accessed and modifi ed using th M The boiler can be used to manage the heating and domestic hot button and the +/- buttons (see fi...

  • Page 36: Menu 2 - Boiler Parameter

    settings - adjustment - problem identifi cation menus Description range BOILER PARAMETER Service code Press +/- to select code 234 and press BOILER GENERAL SETTINGS Soft ignition from 0 to 90 see Gas Settings (pages 29 and 30) Zone Frost Temperature (Room Temperature) from 2 to 10 only active when the BUS device is (°C)

  • Page 37: Menu 3 - Boiler With Storage And Boiler With Solar Kit

    settings - adjustment - problem identifi cation menus Description range CENTRAL HEATING PARAMETER - PART 1 NOT PRESENT NOT PRESENT NOT PRESENT Post-ventilation after Central Heating 0 = OFF request 1 = ON Boost Time from 0 to 60 only enabled with Room Thermostat (minutes) on/off...

  • Page 38: Menu 4 - Zone 1 Parameter

    settings - adjustment - problem identifi cation menus Description range SPECIAL SETTINGS Anti-legionella Function - NOT ACTIVE Only for boiler with storage inside Solar Confi guration Type 0 = Nothing or single coil Natural Select 1 or 2 only if the Solar Kit is circulation installed 1 = Single coil Forced circulation...

  • Page 39: Menu 5 - Zone 2 Parameter

    settings - adjustment - problem identifi cation menus Description range Parallel curve shift Zone 1 Off set from - 20 to + 20 To adapt the heating curve to the system requirements, shift the curve in parallel so that the calculated fl ow temperature is modifi...

  • Page 40: Menu 7 - Test & Utilities

    settings - adjustment - problem identifi cation menus Description range Parallel curve shift Zone 2 Off set from - 20 to + 20 To adapt the heating curve to the system requirements, shift the curve in parallel so that the calculated fl ow temperature is modifi...
  • Page 41 settings - adjustment - problem identifi cation menus Description range BOILER TEMPERTURE Set temperature Central Heating(°C) Flow Heating temperature (°C) Return Heating temperature (°C) Domestic Hot Water Temperature (°) (COMBI) SOLAR & STORAGE Storage Temperature (°) Solar collector Temperature D.H.W. Inlet Temperature NTC Storage Low Displayed only with Solar Kit or external storage Kit...

  • Page 42: Maintenance

    maintenance Operational test Important After having carried out the maintenance operations, fi ll the Maintenance is an essential part of the safe and effi cient operation heating circuit at a pressure of approximately 1.0 bar and release of the boiler and ensures its durability. It should be performed the air from the system.

  • Page 43: Draining The System

    maintenance Draining the System Instructing The End User 1. Hand over the copy of the End User Instructions supplied with Draining the Heating System the appliance, together with these instructions, and explain The heating system must be drained as follows: how to use the timeclock and room thermostat if fi...

  • Page 44: Maintenance Guide

    maintenance guide General access GENERAL ACCESS Tools Time 3 min Unclip the cover to remove Remove the two screws Remove the front panel Remove the combustion chamber Lower the electrical box front panel by releasing the clips...

  • Page 45: Electrical Unit

    maintenance guide Electrical Unit Control Box access CONTROL BOX ACCESS Tools Time 4 min Remove the front panel as above Unlock the four clamps to gain and pivot the electrical box access to the control box Fuse FUSE FUSE Tools Time 5 min Open the control box as above...

  • Page 46: Main P.c.b

    maintenance guide Main PCB MAIN PCB MAIN PCB Tools Time 7 min After opening the control box, Unscrew the two screws and disconnect the electrical plug remove the PCB connectors Display PCB DISPLAY PCB DISPLAY PCB Tools Time 7 min Lower the door and remove the Unscrew the four screws and Unclip the cover to remove...

  • Page 47: Hydraulic Unit

    maintenance guide Hydraulic Unit Right hand hydraulic block assembly CLAS 24/30 FF RIGHT HAND HYDRAULIC BLOCK ASSEMBLY LEGEND Diverter valve motor Diverter valve Auto air vent Primary water pressure switch Pump Central heating filter Not applicable in UK Non-return valve Non-return valve assembly 10.

  • Page 48: Way Valve

    maintenance guide 3 way valve 3 WAY VALVE CLAS 24/30 FF 3 WAY VALVE UNIT Tools Time 5 min Remove the clip and lift the motor from the Unplug the diverter valve cable diverter valve body Drain the boiler (see 3.3). Remove the clip and When reassembling, ensure the diverter valve is lift the diverter valve from the assembly aligned correctly...

  • Page 49: Automatic Air Vent

    maintenance guide Automatic air vent AUTOMATIC AIR VENT AUTOMATIC AIR VENT Tools Time 5 min Drain boiler (see 3.3). Remove the clip and lift the AAV from the assembly Primary water pressur sensor PRIMARY WATER PRESSURE SENSOR PRIMARY WATER PRESSURE SENSOR 5 min Tools Time...

  • Page 50: Pump

    maintenance guide Pump PUMP PUMP Tools Time 10 min Disconnect the pipe and then Drain boiler (see 3.3). Remove move the pump to the right Remove the pump the clip and the two screws disengage Remove the sensor (see 3.5) Remove the AAV (see 3.4) CH Filter CH FILTER...

  • Page 51: Fl Ow Switch Assembly

    maintenance guide DHW Flow switch assembly DHW FLOW SWITCH ASSEMBLY CLAS 24/30 FF DHW FLOW SWITCH ASSEMBLY Tools Time 5 min Drain boiler (see 3.3). Remove the clip and pull the Twist the flow switch assembly to disengage flow switch assembly towards you...

  • Page 52: Left Hand Hydraulic Block Assembly

    maintenance guide Left hand hydraulic block assembly LEFT HAND HYDRAULIC BLOCK ASSEMBLY CLAS 24/30 FF 1. DHW temperature sensor 4. Safety valve 2. Left hand hydraulic block 5. Central heating flow 3. By-pass assembly 6. Domestic hot water outlet CLAS SYSTEM 21/28 FF 1.

  • Page 53: Temperature Sensor

    maintenance guide D.H.W. Temperature sensor 3.10 DHW TEMPERATURE SENSOR CLAS 24/30 FF DHW TEMPERATURE SENSOR Tools Time 5 min Isolate the cold water supply and drain the DHW circuit. Lift the sensor from Sensor without wire and clip Unplug the DHW sensor and the assembly remove the clip Safety valve...

  • Page 54: By-Pass Assmbly

    maintenance guide By-pass assembly 3.12 BY-PASS ASSEMBLY BY-PASS ASSEMBLY Tools Time 5 min Drain boiler (see 3.3). Remove the second clip and pull the assembly Push on the by-pass to disengage it towards you Secondary heat exchanger 3.13 SECONDARY HEAT EXCHANGER CLAS 24/30 FF SECONDARY HEAT EXCHANGER Tools...

  • Page 55: Temperature Sensor & Overheat Thermostat

    maintenance guide Temperature sensors & overheat thermostat 3.14 TEMPERATURE SENSORS & OVERHEAT THERMOSTAT TEMPERATURE SENSORS & OVERHEAT THERMOSTAT Tools Time 5 min Remove the clips and the Unplug the electrical connectors temperature sensor or overheat thermostat together IMPORTANT!!!! Do not use conducting paste for the contact sensors because it will alter the resistance value. TEMPERATURE (°C) RESISTANCE (kOmh)

  • Page 56: Main Heat Exchanger

    maintenance guide Main heat exchanger 3.15 MAIN HEAT EXCHANGER MAIN HEAT EXCHANGER Tools Time 15 min Drain boiler (see 3.3). Remove Remove the four pipes clips and Remove the two pipes to free the two screws and pivot the the overheat sensor the heat exchanger combustion chamber panel Remove the two screws at the...

  • Page 57: Burner Unit

    maintenance guide 4. BURNER UNIT Burner unit...

  • Page 58: Spark Generator

    maintenance guide Spark generator SPARK GENERATOR SPARK GENERATOR Tools Time 5 min Disconnect electrically the Free the wire by removing the Disconnect the spark generator boiler and open the control two screws and the earth from the control box Pull the spark generator Unplug the ignition electrode towards you after removing from the spark generator...

  • Page 59: Burner

    maintenance guide Burner BURNER BURNER Tools Time 15 min Isolate the gas supply. Remove the electrodes as above Remove the two screws from the Pull the assembly towards Remove the compensation burner flexible pipe and the two screws from the gas elbow Remove the four screws to free The burner the manifold...

  • Page 60: Fun

    maintenance guide Tools Time 5 min Remove the air pressure switch support and the Disconnect the fan wires condensate collector Remove the four screws and pull the fan towards you Air pressure switch AIR PRESSURE SWITCH AIR PRESSURE SWITCH Tools Time 4 min Disengage the air pressure switch by...

  • Page 61: Gas Valve

    maintenance guide Gas valve GAS VALVE GAS VALVE Tools Time 15 min Remove the screw to free the Remove the screws to free the spark generator and the Remove the gas valve wires gas valve assembly compensation flexible pipe Remove the four screws to Remove the three screws to free Gas valve assembly free the gas part between the...

  • Page 62: Annual Maintenance

    maintenance guide Annual Maintenance 5. ANNUAL MAINTENANCE Plate heat exchanger Maintenance Interval: As necessary How: To measure specification of DHW performance. By-pass & Safety valve Maintenance Interval: Annually How: Visual inspection / Clean as necessary Central heating filter Maintenance Interval: Annually How: Visual inspection / Clean as necessary Flow switch operation Maintenance Interval: Annually...

  • Page 63: Short List

    short list Key N Description Type Manf. Pt.N 24 28 21 28 30 0110 ELECTRODE (IGNITION/DETECTION) 65104549 ... 0576 TEMPERATURE PROBE + CLIP 990686 0632 TEMPERATURE PROBE + CLIP 990686 0638 AUTO AIR VENT WITH O-RING 65104703 0706 PRINTED CIRCUIT BOARD (DISPLAY) 65104448...

  • Page 65: Benchmark - Gas Boiler 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. CONTROLS To comply with the Building Regulation, each section must have a tick in one or other of the boxes TIME &...
  • Page 66 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 68 Commercial subsidiaries: MTS (GB) Limited MTS Heating Limited MTS Building Damastown Industrial Park Hughenden Avenue Damastown Avenue High Wycombe Mulhuddart Bucks HP13 5FT Dublin 15 Telephone: (01494) 755600 Telephone: (01) 810 3723 Fax: (01494) 459775 Fax: (01) 810 3727 Internet: www.mtsgroup.com/uk Internet: www.mtsgroup.com/ie E-mail: info@uk.mtsgroup.com E-mail: info@ie.mtsgroup.com...
  • Page 70 GUARANTEE The appliance is guaranteed for 24 months from the date of purchase. Thank you for choosing an ARISTON boiler. Aristons only obligation under the guarantee will be to repair or repla- We guarantee that your boiler is a reliable and ce the faulty appliacnce at Aristons discretion.
  • Page 71 It ensures the building stays at the ideal temperature, whilst saving energy. The principle is that the water temperature at the boiler outlet is automatically adjusted, depending on the interior ambient temperature. Control Panel CLAS 24 FF CLAS 30 FF Legend: 10. Domestic Hot Water adjustment knob (COMBI models) Display 11.
  • Page 72 user’ manual Initial operating procedures Winter or summer function If the boiler is installed inside the apartment, make sure that Turn the heating button 6 to select the desired operating mode all provisions relating to the air inlet and room ventilation (in (winter or summer).
  • Page 73 user’ manual COMFORT function (COMBI) Stand by To activate the comfort mode it is necessary to press the comfort To switch off the boiler press the ON/OFF 13. button 17, this will be indicatd by a yellow light 4. The comfort Switch off...
  • Page 74 user’ manual Appliance shut-off conditions Operation shutdown error table The boiler is protected from malfunctions by means of internal checks performed by the electronic P.C.B., which stops the boiler Display Description from operating if necessary. In the event of the boiler being shut off in this manner, a code appears on the control panel display which 1 01 Overheating...
  • Page 75 user’ manual Auto button - Temperature adjustment activation The AUTO function enables boiler operation to be adapted to environmental conditions and to the type of system it is installed Comfortable temperature is reached inside the room in the quickest way possible, without wasting money, energy or effi ciency, while substantially reducing the amount of wear experienced by the components.
  • Page 76 Commercial subsidiaries: MTS (GB) Limited MTS Heating Limited MTS Building Damastown Industrial Park Hughenden Avenue Damastown Avenue High Wycombe Mulhuddart Bucks HP13 5FT Dublin 15 Telephone: (01494) 755600 Telephone: (01) 810 3723 Fax: (01494) 459775 Fax: (01) 810 3727 Internet: www.mtsgroup.com/uk Internet: www.mtsgroup.com/ie E-mail: info@uk.mtsgroup.com E-mail: info@ie.mtsgroup.com...

This manual is also suitable for:

Clas 30 ffClas system 21 ffClas system 28 ff

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