Ariston CLAS HE Series Installation And Servicing Instruction
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Ariston CLAS HE Series Installation And Servicing Instruction

Gas fired condensing wall hung combination boilers
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Installation and Servicing Instructions
CLAS
Country of destination GB, IE
HE
Gas fired condensing wall hung
combination boilers
G.C.N : 47-116-51 (24 kW)
G.C.N : 47-116-52 (30 kW)
G.C.N : 47-116-53 (38 kW)
CLAS HE 24
CLAS HE 30
CLAS HE 38
The code of practice for the installation,
commissioning & servicing of central heating systems

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  • Page 1 Installation and Servicing Instructions CLAS Gas fired condensing wall hung combination boilers G.C.N : 47-116-51 (24 kW) G.C.N : 47-116-52 (30 kW) G.C.N : 47-116-53 (38 kW) CLAS HE 24 CLAS HE 30 CLAS HE 38 Country of destination GB, IE The code of practice for the installation, commissioning &...

  • Page 2: Table Of Contents

    overview INDEX Overview General Information ....................3 Advice for the Installer .....................4 CE Labelling .........................4 Data Plate Symbols ....................4 Safety Regulations ....................5 Product description Control Panel.......................6 Display ...........................6 Overall View .........................7 Overall Dimension ....................7 Minimum Clearances ....................7 Technical Information ....................8 Installation Reference Standards ....................9 Installing the Boiler ....................

  • Page 3: Overview

    overview These instructions are suitable for CLAS HE 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 4: Advice For The Installer

    overview Advice for the installer CE labelling The installation and first ignition of the boiler must be The CE mark guarantees that the appliance conforms to the fol- performed by qualified personnel in compliance with lowing directives: current national regulations regarding installation, and - 90/396/CEE in conformity with any requirements established by relating to gas appliances...

  • Page 5: Safety Regulations

    overview Safety regulations and not slippery and that the ladders are fitted with handrails on either side of the ladder and parapets on the landing. Key to symbols: Personal injury caused by falling from a height. During all work carried out at a certain height (generally Failure to comply with this warning implies the risk of with a difference in height of more than two metres), personal injury, in some circumstances even fatal...

  • Page 6: Product Description

    product description Control panel � Legend : 11. Domestic Hot Water adjustment knob 1. Display 1. Time clock . R button eset 13. ON/OFF button 3. Red indicator locking light 14. Blue indicator burner ON 4. Orange indicator C fonction OmfORt 15.

  • Page 7: Overall View

    product description Overall view 1. flue connector . air pressure switch 3. burner 4. detection Electrode 5. overheat thermostat 6. C.H. Return temperature probe 7. C.H. Flow temperature probe 8. gas valve 9. secondary heat exchanger 10. D.H.W. temperature probe 11.

  • Page 8: Technical Information

    product description Technical Data Model 24 kW 30 kW 38 kW CE Certification (pin) 0085BR0347 Boiler type B3-C13-C33-C43-C53-C83 Max/min nominal calorific flow rate (Pci) ,0/5,5 8,0/6,5 31,0/7,5 Max/min nominal calorific flow rate (Pcs) 4,4/6,1 31,1/7, 34,4/8,3 Domestic hot water max/min nominal calorific flow rate (Pci) 5,0/5,5 30,0/6,5 38,0/7,5...

  • Page 9: Installation

    installation Reference Standards due regard for the damage or discolouration that may occur to In the United Kingdom, the installation and initial start-up of the building within the vicinity and consideration must also be given boiler must be by a CORGI registered installer in accordance with to adjacent boundaries, openable windows should also be taken the installation standards currently in effect, as well as with any into consideration when siting the flue.
  • Page 10 installation Water Supply Preiodically check the pH balance of the water/anti-freeze mixture of the boiler circuit and replace it when the amount The boiler is suitable for sealed systems only. The maximum working pressure for the appliance is 6 bar. All fittings and measured is out of the range stipulated by the manufacturer (7 pipework for the appliance should be of the same standard.
  • Page 11 installation 3. External termination of condensate drainage pipe via internal ii) Connecting into the waste system of the building such as a discharge branch (e.g. sink waste - proprietary fitting). washing maching or sink trap. The connection must be upstream of the washing machine/sink. If the connection is down stream of if the waste trap then an additional trap giving a minimum water seal of 75mm and an air break must be incorporated in the pipe run, as above.

  • Page 12: Installing The Boiler

    installation Installing the Boiler Please check that you are familiar with the installation requirement before commencing work (pages 7 - 11). 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 valves (Compression) - Screws and washers...

  • Page 13: Gas Connection

    installation Gas connection Instructions for opening the casing and performing an internal inspection Make sure, using the labels on the packaging and the data plate Before performing any work on the boiler, first disconnect it from on the appliance itself, that the boiler is in the correct country the electrical power supply using the external bipolar switch and that the gas category for which the boiler was designed removing the fuse and shutting off the gas valve.
  • Page 14 installation Water circuit diagram To calculate the size of the heating installation, refer to the "Available pressure" graph below. Graph representing the available circulation pump pressure ΔT20 mbar 30-38 kW 30-35 kW 24 kW 1000 1100 1200 Before the first time the equipment is used, the trap must be filled with water.

  • Page 15: Connecting The Flue

    installation Connecting the Flue Flue System The provision for satisfactory flue termination must be made as described in BS 5440-1. The appliance must be installed so that the flue terminal is expo- sed to outdoor air. The terminal must not discharge into another room or space such as an outhouse or lean-to.

  • Page 16: Fitting The Coaxial Flue (Ø 60/100 Horizontal)

    installation Warning The exhaust gas ducts must not be in contact with or close to Important inflammable material and must not pass through building struc- Ensure that the flue is not blocked. tures or walls made of inflammable material. Ensure that the flue is supported and assembled in accordance When replacing an old appliance, the flue system must be chan- with these instructions.

  • Page 17: Fitting The 5" Flue (Ø 80/15 Horizontal / Vertical)

    installation Clamp Screws Seal Fig. 4 Fitting the 5” Flue Once the boiler has been positioned on the wall, it is necessary (Ø 80 / 15 Horizontal/vertical) to insert the Ø80/15 adaptor (Fig. 5) for both horizontal and vertical flue runs into the boiler flue socket (not supplied with flue kit - Part No 3318095).

  • Page 18: Fitting The Coaxial Flue (Ø 60/100 Vertical)

    installation Fitting the Coaxial Flue Note: See table for maximum and minimum flue runs. (Ø 60 / 100 Vertical) Contents: 1x Silicone O-Ring (60mm) 1x Conical Adaptor (60/100mm) 1x Vertical Flue Kit (80/15mm) 3x Screws 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 19: Fitting The Twin Pipe (Ø 80/80)

    installation Fitting the Twin Pipe (Ø80 / 80) When siting the twin flue pipe, the air intake and exhaust terminals must terminate on the same wall, the centres of the terminals must be a minimum of 80 mm apart and the air intake must not be sited above the exhaust terminal (refer to Fig.
  • Page 20 installation Fig. 9 AIR INTAKE MUST NOT BE FITTED ABOVE THE EXHAUST AIR INTAKE EXHAUST AIR INTAKE Fig. 10 For coaxial systems, the maximum development value, mentio- ned in the table below also takes into account an elbow. For twin flue systems the maximum development value, mentio- ned in the table includes the exhaust gas/air intake terminal.
  • Page 21 installation Table of flue gas exhaust duct lengths DIAMETER of COAXIAL SYSTEM FLUE TYPE LENGTH PIPE 1 m 60/100 36 m 80/15 10 m 60/100 Flue gas exhaust and air suction duct 30 m 80/15 through external wall in the same range of pressure 60/100 18 m...
  • Page 22 installation DIAMETER of TWIN-PIPE SYSTEM FLUE TYPE LENGTH PIPE 36 m (S1=S) 30 m Flue gas exhaust and air suction duct 80/80 (S1=S) through external wall in the same range of pressure 18 m (S1=S) 60 m (S1=S) C 33 50 m Flue gas exhaust andair suction duct from 80/80...

  • Page 23: Electrical Connections

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

  • Page 24: Room Thermostat Connection

    installation Room thermostat connection Introduce the thermostat wire - Loosen the cable clamp using a screwdriver and insert the wires leading from the room thermostat one at a time. - Connect the wires to the terminals as indicated in the figure below, removing the link - Make sure that they are well connected and that they are not subject to stress when the control panel lid is opened or...

  • Page 25: Electrical Diagram

    installation Electrical diagram For increased safety, ask a qualified 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: Commissioning

    commissioning Initial preparation Open the gas cock (supplied with the connection kit) to the MTS (GB) Limited support the benchmark initiative. On pages appliance and check the gas connection on the appliance for pages 65 and 66 of this manual the Benchmark Commissioning leaks.

  • Page 27: First Igniton Operation

    commissioning FIRST IGNITION OPERATION Date ......Installer ......1.

  • Page 28: Ignition Procedure

    commissioning Ignition procedure (See below). If you need to stop it press e , alternatively it is Press the ON/OFF button on the control panel to switch on the possible to manually vent the heat exchanger. boiler. The display shows: At the end, check that the system is completely deaerated and, if not, repeat the procedure.
  • Page 29 commissioning Heating ignition delay adjustment This parameter – menu /sub menu 3/parameter 5 - can be used to manually (0) or automatically (1) set the delay time before the subsequent reignition of the burner after it has switched off on reaching the desired temperature in central heating mode.

  • Page 30: Test Function And Combustion Analysis

    commissioning Test function and combustion analysis Wait for the boiler to stabilise before carrying out the combustion The boiler has two pressure taps to measure the combustion gas analyses. Check the CO value according to the table below. Important: do not remove silencer 22 temperature, the combustive air and the concentrations of O and CO on the outside of the flue gas header.

  • Page 31: Auto Function

    commissioning AUTO function Example 1: This is a function which enables the boiler to automatically adapt ingle zOne sYstem high tempeRAtuRe with On Off ROOm heRmOstAt its operation routine (the temperature of the heating elements) in In this case the following parameters must be set: line with the outdoor conditions, in order to achieve and maintain 4 1 - Activation of temperature adjustment using sensors the requested room temperature conditions.

  • Page 32: 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 stops the boiler from operating if necessary. In the event of the boiler being shut off in this manner, a code appears on the display which refers to the type of shut-off and the reason behind it.

  • Page 33: Settings - Adjustment - Problem Identification Menus

    settings - adjustment - problem identification menus Accessing the settings - adjustment - problem identification The parameters relating to each individual menu are listed in the following pages. menus The various parameters can be accessed and modified using th The boiler can be used to manage the heating and domestic hot programmation buttons button and (see fig.
  • Page 34 settings - adjustment - problem identification menus description value 2 BOILER PARAMETER SETTING 2 1 Entering access code  press the programming "+" button to select 34 and press the m button 2 2 BOILER GENERAL SETTING 2 2 0 Slow ignition 0 to 99 RESERVED FOR SAT 2 2 1 Minimum ambient temperature for...
  • Page 35 settings - adjustment - problem identification menus description value 2 4 BOILER PARAMETER - PART 2 2 4 0 NOT PRESENT 2 4 1 NOT PRESENT 2 4 2 NOT PRESENT 2 4 3 Post-ventilation after heating request 0 = OFF 1 = ON 2 4 4 Time delay after heating temperature increase from 0 to 60 minutes...
  • Page 36 settings - adjustment - problem identification menus Description value 3 BOILER WITH TANK (INTERNAL OR EXTERNAL) AND SOLAR APPLIANCE CONNECTION 3 0 GENERAL SETTING 3 0 0 NOT ACTIVATED 3 0 1 NOT ACTIVATED 3 0 2 NOT ACTIVATED NOT ACTIVATED 3 2 SPECIAL SETTING 3 2 0 NOT ACTIVATED...
  • Page 37 settings - adjustment - problem identification menus description value 4 ZONE 1 PARAMETER 4 0 ZONE 1 TEMPERATURE SETTING 4 0 0 Zone 1 comfort temperature setting from 10 to 30 °C Activated only with the modulating device con- "Comfort ambience T" nected (option) 4 0 1 Zone 1 reduced temperature setting from 10 to 30 °C...
  • Page 38 settings - adjustment - problem identification menus description value 5 ZONE 2 PARAMETER ZONE 2 TEMPERATURE SETTING 5 0 0 Zone  comfort temperature setting from 10 to 30 °C 19 Activated only with the modulating device connected "Comfort ambience T" (option) 5 0 1 Zone  reduced temperature setting from 10 to 30 °C...
  • Page 39 settings - adjustment - problem identification menus description value 7 TEST & UTILITIES 7 0 0 Function test - Cleaning activation can also be obtained by pressing the Reset t-- = funct. at Max heating turn the encoder to select the operating power button for 10 seconds.
  • Page 40 settings - adjustment - problem identification menus Description value 8 6 STATISTICS 8 6 0 Number of hours burner operating in heater mode (xxh) 8 6 1 Number of hours burner operating in hot water mode (xxh) 8 6 2 Number of flame separations 8 6 3 Number of ignition cycles 8 6 4 Number of filling cycles performed 8 6 5 Average length of heating request...

  • Page 41: Maintenance

    maintenance Important Draining procedures Maintenance is an essential part of the safe and efficient operation The heating system must be drained using the following of the boiler and ensures its durability. It should be performed procedure: according to the instructions given in current legislation. Perform - Switch off the boiler, make sure the external bipolar switch is in combustion analysis regularly in order to check the operating the OFF position and shut off the gas valve;...

  • Page 42: General Access

    MAINTENANCE GUIDE 1. GENERAL ACCESS MAINTENANCE GUIDE: GENUS PREMIUM GENERAL ACCESS GENERAL ACCESS Tools Time 3 min Unclip the cover to remove Remove the two screws Remove the front panel Remove the combustion Lower the electrical box chamber front panel by releasing the clips Page.

  • Page 43: Electrical Unit

    MAINTENANCE GUIDE 2. ELECTRICAL UNIT MAINTENANCE GUIDE: GENUS PREMIUM 2 ELECTRICAL UNIT CONTROL BOX ACCESS CONTROL BOX ACCESS Tools Time 4 min Remove the two screws and Remove the front panel as above unlock the four clamps to gain and pivot the electrical box access to the control box FUSE FUSE...
  • Page 44 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM 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 Tools Time 7 min Lower the door and remove the Unscrew the four screws and Unclip the cover to remove...

  • Page 45: Hydraulic Unit

    MAINTENANCE GUIDE: GENUS PREMIUM MAINTENANCE GUIDE 3 HYDRAULIC UNIT 3. HYDRAULIC UNIT 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 46 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM DRAINING DRAINING Tools Time 5 min Turn the drain valve anti-clockwise to open and drain the water from the boiler. 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 PRESSURE SENSOR PRIMARY WATER PRESSURE SENSOR...
  • Page 47 Drain boiler (see 3.3). Remove the fixing clip, MAINTENANCE GUIDE unplug the electrical connector and lift the sensor from the assembly 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...
  • Page 48 Remove the clip Remove the filter MAINTENANCE GUIDE DHW FLOW SWITCH ASSEMBLY 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 MAINTENANCE GUIDE: GENUS PREMIUM LEFT HAND HYDRAULIC BLOCK ASSEMBLY Page.
  • Page 49 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 MAINTENANCE GUIDE 3.10 DHW TEMPERATURE SENSOR DHW TEMPERATURE SENSOR Tools Time 5 min Isolate the cold water supply and drain the DHW circuit.
  • Page 50 MAINTENANCE GUIDE Drain primary and domestic hot water circuits. Remove the two screws and remove the heat exchanger 3.12 CONDENSE TRAP CONDENSE TRAP Tools Time 5 min Unscrew the condense trap from the condense body MAINTENANCE GUIDE: GENUS PREMIUM 3.13 SAFETY VALVE Page.
  • Page 51 Drain boiler (see 3.3). Disconnect the Remove the first clip on the left and discharge pipe pull the safety valve towards you MAINTENANCE GUIDE 3.14 BY-PASS ASSEMBLY BY-PASS ASSEMBLY Tools Time 5 min Drain boiler (see 3.3). Remove the MAINTENANCE GUIDE: GENUS PREMIUM second clip and pull the assembly Push on the by-pass to disengage it toward you...
  • Page 52 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM 3.16 MANUAL AIR VENT MANUAL AIR VENT Tools Time 5 min Remove the clip and lift the manual air vent from the exchanger 3.17 THERMAL FUSE THERMAL FUSE Tools Time 5 min Twist the thermal fuse to remove Page.

  • Page 53: Main Heat Exchanger

    MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM 3.18 MAIN HEAT EXCHANGER MAIN HEAT EXCHANGER Tools Time 20 min Drain boiler (see 3.3). Remove the four clips and disconnect the Isolate the gas supply. Remove pipes between Remove the four screws to free the four screws and disconnect exchanger pump...

  • Page 54: Burner Unit

    MAINTENANCE GUIDE: GENUS PREMIUM MAINTENANCE GUIDE 4 BURNER UNIT 4. BURNER UNIT LEGEND 1. Burner 6. Gas valve 2. Fan 7. Mixing tube 3. Silencer 8. Detection electrode 4. Gas inlet 9. Ignition electrode 5. Air inlet 10. Spark generator Page.
  • Page 55 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM SPARK GENERATOR SPARK GENERATOR Tools Time 5 min Unplug the ignition electrode from Remove the screw and the the spark generator spark generator ELECTRODES ELECTRODES Tools Time 5 min Remove the screws and pull the Unplug the electrodes electrodes towards you.
  • Page 56 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM BURNER BURNER Tools Time 15 min Isolate the gas supply. Remove the Pull the assembly towards Remove the silencer four screws and disconnect the gas pipe from the gas valve Remove the three screws to free Pull the burner toward you the burner door Power...

  • Page 57: Fan Unit

    MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM Tools Time 15 min Remove the three screws to free the Remove the combustion fan. assembly (see 4.3) Twist the gas valve anti-clockwise to disengage it from the fan 1. Venturi Fan & mixer venturi according to the model Power Venturi diameter 24 KW...

  • Page 58: Gas Valve

    MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM GAS VALVE GAS VALVE Tools Time 15 min Remove the combustion Twist the gas valve anti-clockwise to assembly (see 4.3) disconnect it from the fan Bayonet connection 1. Venturi 4. Inlet test nipple 2. Gas valve 5.

  • Page 59: Annual Maintenance

    MAINTENANCE GUIDE: GENUS PREMIUM MAINTENANCE GUIDE 5. 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...
  • Page 60 MAINTENANCE GUIDE MAINTENANCE GUIDE: GENUS PREMIUM Condensate trap Maintenance Interval: Annually or after cleaning primary heat exchanger How : Visual inspection / Clean as necessary / Add water before replacing Pump Maintenance Interval: At the first ignition and annually How: Check that the AAV is open / Visual inspection / Clean as necessary Page.

  • Page 61: 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. CONTROLS To comply with the Building Regulation, each section must have a tick in one or other of the boxes TIME &...
  • Page 62 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 63: Spare Parts Short List

    SHORT LIST SHORT LIST CLAS Key N Description Manf. date Manf. Pt.N Other Type from 24 30 0100 BURNER ASSEMBLY 0110 61317432 IGNITION ELECTRODE 0111 61317433 IONIZATION ELECTRODE 0112 61314753 GASKET D:85-66.5-2.5 0134 60000286 ELECTRODE GASKET 0135 60000297 COMBUSTION CHAMBER LINING KIT 0136 60000623 DOOR GASKET...
  • Page 64 Manufacturer: Merloni TermoSanitari SpA - Italy Commercial subsidiaries: MTS (GB) Limited Professional Team Limited MTS Building Suites 9 & 10, Plaza 56 Hughenden Avenue Blanchardstown Corporate Park  High Wycombe Ballycoolin Bucks HP13 5FT Dublin 15 Telephone: (01494) 755600 Telephone: (01) 810 373 Fax: (01494) 459775 Fax: (01) 810 377 Internet: www.mtsgroup.com/uk...
  • Page 65 User manual CLAS Condensing wall hung combination boiler G.C.N : 47-116-51 (24 kW) G.C.N : 47-116-52 (30 kW) G.C.N : 47-116-53 (38 kW) CLAS HE 24 CLAS HE 30 CLAS HE 38 The code of practice for the installation, commissioning & servicing of central heating systems...
  • Page 66 GUARANTEE The appliance is guaranteed for 4 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 67 user’ manual Auto Function The AUTO function serves to optimise boiler performance, while maintaining an optimum radiator temperature and maximum user comfort. 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.
  • Page 68 user’ manual Winter or summer function Turn the heating button 6 to select the desired operating mode (winter or summer). In winter mode every heating is shown on the display by the heating temperature. Summer mode is set by putting the button 6 in position (hea- ting off ).
  • Page 69 user’ manual COMFORT function To activate the comfort mode it is necessary to press the comfort button 17, this will be indicatd by a yellow light 4. The comfort mode has priority over any other heating request. There are two settings for the comfort mode (they can be adjusted in the parameters menu): 1.
  • Page 70 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 71 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 efficiency, while substantially reducing the amount of wear experienced by the components.
  • Page 72 Manufacturer: Merloni TermoSanitari SpA - Italy Commercial subsidiaries: MTS (GB) Limited Professional Team Limited MTS Building Suites 9 & 10, Plaza 56 Hughenden Avenue Blanchardstown Corporate Park  High Wycombe Ballycoolin Bucks HP1 5FT Dublin 15 Telephone: (01494) 755600 Telephone: (01) 810 7 Fax: (01494) 459775 Fax: (01) 810 77 Internet: www.mtsgroup.com/uk...

This manual is also suitable for:

Clas he 24Clas he 30Clas he 3847-116-5147-116-5247-116-53

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