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Ariston microGENUS HE 24 MFFI Installation And Servicing Instructions

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Installation and Servicing

Instructions
Type C Boilers
microGENUS HE 24 MFFI G.C.N: 47-116-37
microGENUS HE 28 MFFI G.C.N: 47-116-38
microGENUS HE 32 MFFI G.C.N: 47-116-39
LEAVE THESE INSTRUCTIONS WITH
THE END-USER
Country of destination: GB / IE

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Summary of Contents for Ariston microGENUS HE 24 MFFI

  • Page 1: Installation And Servicing

    Installation and Servicing Instructions Type C Boilers microGENUS HE 24 MFFI G.C.N: 47-116-37 microGENUS HE 28 MFFI G.C.N: 47-116-38 microGENUS HE 32 MFFI G.C.N: 47-116-39 LEAVE THESE INSTRUCTIONS WITH THE END-USER Country of destination: GB / IE...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 6.2.3 R . 43 1. GENERAL INFORMATION EMOVING THE ANELS ENERAL NSTRUCTIONS . 44 CCESS TO THE OMBUSTION HAMBER VERALL 6.3.1 R EMOVING THE OMBUSTION . 44 HAMBER 2. INSTALLATION 6.3.2 R . 44 EMOVING THE URNER AND EFERENCE TANDARDS 6.3.3 R...

  • Page 3: General Information

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

  • Page 4: Overall View

    VERALL EGEND Flue Manifold Air Intake for Twin Pipe Flue Systems Combustion Chamber Hood Main Heat Exchanger Overheat Thermostat Central Heating Flow Temperature Probe Combustion Chamber Insulation Panel Burner Detection Electrode Ignition Electrodes Motorised Valve Condensate trap Domestic Hot Water Temperature Probe Low Water Pressure Switch Secondary Heat Exchanger Gas Valve...

  • Page 5: Installation

    INSTALLATION ITING THE PPLIANCE EFERENCE TANDARDS The appliance may be installed in any room or indoor The technical information and instructions provided area, although par ticular attention is drawn to the herein below are intended for the installer / Servicing requirements of the current I.E.E.

  • Page 6: Overall Dimensions

    VERALL IMENSIONS EGEND A = Central Heating Flow (3/4” - 22mm Copper Tail) B = Domestic Hot Water Outlet (1/2” - 15mm Copper Tail) C = Gas Inlet (3/4” - 15mm Copper Tail) D = Domestic Cold Water Inlet (1/2” - 15mm Copper Tail) E = Central Heating Return (3/4”...

  • Page 7: Electrical Connection

    2.5.1. Drill the wall and plug using those supplied with the connections kit, position the hanging bracket and secure with the wall bolts supplied, assemble the connection kit and secure to the wall. N : It is highly recommended that a spirit level be used to position the appliance to ensure that it is perfectly level.

  • Page 8: Gas Connection

    The local gas region contractor connects the gas meter to ONNECTION 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 9 AFETY ALVE ISCHARGE OMESTIC ATER The discharge should terminate facing downward on the The domestic water must be in accordance with the exterior of the building in a position where discharging relevant recommendation of BS 5546:1990. Copper (possibly boiling water & steam) will not create danger or tubing to BS EN 1057:1996 is recommended for water nuisance, but in an easily visible position, and not cause carrying pipe work and must be used for pipe work...

  • Page 10: Condensate

    situation it is necessary to treat the water with an appropriate corrosion inhibitor. - Any treatment of water by additives in the system for frost protection or for corrosion inhibition has to be absolutely suitable for all the metals used in the circuit. The use of a corrosion inhibitor in the system such as Fernox MB-1, BetzDeaborn Sentinel X100 or Fernox System Inhibitor is recommended to prevent corrosion...
  • Page 11 ii) Connecting into the waste system of the building such 2. External termination of condensate drainage pipe via as a washing machine or sink trap. The connection internal discharge branch (e.g. sink waste) and condensate siphon must be upstream of the washing machine/sink (If the connection is down stream of the waste trap then an additional trap giving a minimum water seal of 75 mm and an air break must be incorporated in the pipe run,...

  • Page 12: Flue

    2.9. ONNECTING THE YSTEM 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 MPORTANT exposed to outdoor air. BEFORE CONNECTING THE FLUE ENSURE THAT LITRE OF The terminal must not discharge into another room or space WATER HAS BEEN POURED INTO THE EXHAUST CONNECTION TO...

  • Page 13: Fitting The Coaxialf

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

  • Page 14: Fitting The 5" Flue

    Once cut to the required length, ensure that the flue is free from burrs and reassemble the flue. If fitting the flue from inside of the building attach the grey outer wall seal to the flue terminal and push the flue through the hole, once the wall seal has passed through the hole, pull the flue back into the elbow (ensuring that the flue seal is not dislodged) until the external wall seal is...

  • Page 15: Ertical

    clamps are necessary to secure the flue components. Before proceeding to fit the flue, ensure that the maximum flue length has not been exceeded (See the tables on Page 19) and that all elbows and bends have been taken into consideration, the maximum flue length is 10 metres, for each additional 90 elbow 1 metre must be subtracted from the total flue length, and for...

  • Page 16: Fitting The Twin Pipe

    roof (see Fig. 2.16 for distance from the wall to the centre of the flue). Cut a 120mm diameter hole through the ceiling and/or roof and fit the flashing plate to the roof. DO NOT cut the vertical flue kit. To connect the vertical flue kit directly to the boiler, place the vertical starter kit (Part No.
  • Page 17 The twin flue pipes can be fitted with or without additional elbows and need no clamps, simply ensure that the red o- ring is inserted in the female end of the flue pipe and push the extension piece fully into the previous section of flue pipe or elbow, check that the o-ring is not dislodged when assembling the flue.
  • Page 18 In the event that the air intake and exhaust are run to the left, it will be necessary to reduce the height of the air intake by cutting 20mm from the base of the air intake elbow (see Fig. 2.19) Fig.
  • Page 19 Do not remove the Remove the Length Length Maximum Flue 24 MFFI Exhaust Type ø 40 mm Restrictor Reduction 45 Reduction 90 Length Restrictor (Fig.2.20A) elbow (m) elbow (m) Type 1 Coaxial Between Between Type 2 Systems 0.5 m 1.0 m 500 mm - 1 m 1 m - 4 m ø...
  • Page 20 FIG. 2.21 RAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY Fig. 2.22...

  • Page 21: Control Panel

    2.10 ONTROL ANEL EGEND A - On/Off Button B - Domestic Hot Water Temperature Adjustment C - Central Heating Temperature Adjustment D - Reset Button/Flue Test analysis mode* E - Comfort Mode Selector F - Summer Mode LED (Green) G - Ignition/Overheat Lockout LED (Red) H - Central Heating (Winter Mode) LED (Green) I - Digital Display (Fault Code/Water Temperature) .

  • Page 22: Removing The Frontp

    2.12 EMOVING THE RONT ANEL In order to access the inside of the boiler, it is necessary to unscrew the fastening screws “A” of the control panel located on the lower part of the panel itself. The control panel moves downward and when pulled forward rotates on two lateral hinges.

  • Page 23: Fitting The Digitalc

    2.14. ITTING THE IGITAL LOCK The microGENUS HE boiler is supplied with a factory fitted mechanical time clock. There is a digital clock available as an optional extra (code: 706348). To fit the digital clock it is necessary to proceed as follows:- 1.

  • Page 24: Setting The Mechanical

    2.15. ETTING THE ECHANICAL LOCK 1. General layout The mechanical clock covers a 24 hour period. Each tappet represents 15 minutes A (Fig. 2.32). An override switch is located on the clock B (Fig 2.32). 2. To set the time To set the time of day, grasp the outer edge of the dial and turn slowly clockwise until the correct time is lined up with the arrow C (Fig.
  • Page 25 If you now press the “Prog” key once again, the number of Automatic Manual Continuous Operation Operation Operation free memory Iocations will be displayed, e.g. “18”. If all memory locations are occupied, the display “00” appears. = ON = ON = Continuously ON = OFF = OFF...

  • Page 26: Electrical

    2.17 LECTRICAL YSTEM IAGRAMS CN303 CN302 . 2.33...
  • Page 27 A - Dip Switches B - Summer/Winter Switch - Central Heating Temperature Regulation C - Connector for Remote Control (Climate Manager) D - Domestic Hot Water Temperature Regulation E - Soft-light Regulation F - Maximum Central Heating Temperature Regulation G - ON/OFF Selector H - EEPROM Time Clock Connector L - Release Push Button...

  • Page 28: Water Circuit Diagram

    2.18 ATER IRCUIT IAGRAM . 2.34 14 15 SI016C A. Central Heating Flow EGEND B. Domestic Hot Water Outlet C. Gas Inlet D. Domestic Cold Water Inlet Heat Exchanger E. Central Heating Return Overheat Thermostat Central Heating Flow NTC Burner Detection Electrode Ignition Electrodes Diverter Valve...

  • Page 29: Commissioning

    COMMISSIONING MTS (GB) Limited support the initiative. In NITIAL REPARATION Sections 11 and 12 of this manual you will find the commissioning checklist (page 68) and the service interval record (Page 69), It is important that the commissioning checklist is completed in the presence of your customer, they are shown how to use it, and it is signed by them.
  • Page 30 - If the boiler is installed in an existing system, any unsuitable additives must be removed prior to the fitting of the boiler; - Under no circumstances should the boiler be fired before the system has been thoroughly flushed; the flushing procedure must be in line with BS7593:1992.

  • Page 31: Initial Start Up

    HE CHECKS TO BE RUN BEFORE INITIAL START UP ARE AS NITIAL TART FOLLOWS 1. Make sure that: - the screw on the automatic air valve has been loosened when the system is full; - If the water pressure in the system is below 1.5 bar, bring it up to the appropriate level;...

  • Page 32: Operational Adjustments

    To access the areas in which adjustments are made, it is PERATIONAL necessary to open the control panel, as indicated in DJUSTMENTS 2.12, then remove the rear inspection cover by ECTION unscrewing the two screws “A”. Access is thereby provided to the P.C.B. and to the following components: 1.

  • Page 33: Boiler Safety Systems

    OILER AFETY YSTEMS The boiler is protected from malfunctioning by means of internal checks by the P.C.B., which brings the boiler to a stop if necessary. WARNING! The boiler is still powered. There are two types of shut-off: • SHUTDOWN (A) •...

  • Page 34: Draining The System

    FROST DEVICE The boiler is equipped with an anti-frost device which, operates in two ways depending on the water temperature: Temperature @ Flow Sensor below 8 The pump will run at speed 2 for 2 mins (1 minute in CH and 1 minute in DHW).

  • Page 35: Completion

    For the Republic of Ireland it is necessary to complete a OMPLETION “Declaration of Conformity” to indicate compliance to I.S. 813. An example of this is given in the current edtion of I.S. 813. In addition it is necessary to complete the Commissioning Checklist, (Section 11, page 68).

  • Page 36: Instructing The Endu

    3.11 1. Hand over the copy of the End User Instructions NSTRUCTING supplied with the appliance, together with these instructions, and explain how to use the timeclock and room thermostat if fitted. 2. Show the End User how to switch the appliance off quickly, and indicate the position of the electric supply isolator.

  • Page 37: Gas Adjustments

    MJ/m 45.67 80.58 80.58 Nominal Delivery Pressure mbar Minimum Delivery Pressure mbar microGENUS HE 24 MFFI Main Burner: n. 14 jets (ø) 1.30 0.70 0.70 Consumption (15°C; 1013mbar) max - min 2.54 - 1.16 Consumption (15°C; 1013mbar) max - min Kg/h 1.89 - 0.87...

  • Page 38: Adjusting The Gasp

    DJUSTING THE RESSURES Setting the minimum and the maximum power of the boiler 1. Check that the supply pressure and dynamic working pressure to the gas valve is a minimum of 20 mbar for natural gas and 29 and 37 mbar for LPG (G30 or G31). 2.
  • Page 39 6. When you have completed the above operations, turn off the hot water tap, reconnect the supply terminal to the modureg on the gas valve, reconnect the compensation pipe and replace the cap on the screw CN203 CN206 CN200 of the modureg. CN201 Setting the maximum heating circuit power Max Heating...
  • Page 40 ABLE Regulating the heating power for natural gas (G20) model 24 model 28 model 32 Regulating the heating power for butane gas (G30) model 24 model 28 model 32 Regulating the heating power for propane gas (G31) model 24 model 28 model 32...

  • Page 41: Maintenance

    MAINTENANCE It is recommended that the following inspections be carried out on the boiler at least once a year: Visually check the appliance for correct installation; Check the appliance for the correct operation; Check the flue and flue installation for correct siting, installation and that it is in good condition.;...

  • Page 42: Servicing Instructions

    SERVICING INSTRUCTIONS ENERAL CCESS To ensure efficient safe operation, it is recommended that the boiler is serviced annually by a competent person. All testing and maintenance operations on the boiler require the control panel to be lowered. This will also Before starting any servicing work, ensure both the require the removal of the casing.

  • Page 43: 6.2.3 Removing The Side Panels

    6.2.2 Removing the sealed chamber front cover 6.2.3 Removing the side panels 1. Remove the screws “C” (F . 6.5); 1. Remove the four screws “D” for each side panel 2. Lift the sealed chamber front cover from the locating .6.7);...

  • Page 44: Access To The Combustion

    CCESS TO THE OMBUSTION HAMBER 6.3.1 Removing the combustion cover 1. Remove the screws “E” (F . 6.8); 2. Lift off the combustion cover. . 6.8 . 6.10 6.3.3 Removing the electrodes Before carrying out this procedure, unscrew and slide the burner forward (see previous section).

  • Page 45: Removing The Main Heate

    6.3.4 Removing the main heat exchanger . 6.13 1. Drain the boiler of water; 2. Remove the side panels (see 6.2.3) 3. Remove the overheat thermostat sensor “H” (F . 6.15); 4. Remove the clips “I” (F . 6.15); 5. Release the connection nut “J” (F .

  • Page 46: Removing The Air Pressure

    . 6.18 . 6.21 . 6.19 . 6.22 6.3.5 Removing the air pressure switch 1. Disconnect the electrical connections “L” and silicone pipes “M” from their connection points (F . 6.20); 2. Remove screws “N” on the top of the sealed chamber .

  • Page 47: 6.3.6 Removing The Fan

    6.3.6 Removing the fan 6.3.7 Removing the flue sensor and condensate sensor 1. Remove screw “P” (F .6.24); 1. To remove the flue sensor, disconnect electrical 2. Disconnect electrical connections “Q” and silicone pipe connections “S” (F .6.27); “Q1” (F .6.25);...
  • Page 48 6.3.8 Removing the Recuperator 1. Remove the U-clips “U” (F .6.30); 2. Remove the clamp “V” to disconnect the condensate trap tube (F .6.31); 3. Loosen the nut “W” (F .6.32); 4. Remove the four screws “X” (F .6.33); 5. Remove the recuperator (F .6.34 - 6.35);...

  • Page 49: Removing The Condensate

    6.3.9 Removing the Recuperator Housing 6.3.10 Removing the Condensate Trap 1. Remove the recuperator - see paragraph. 6.3.8 1. Remove the clamp “Z” (F .6.38); 2. Unscrew the two screws “Y” (F .6.36); 2. Remove the clamp “A1” (F .6.39); 3.

  • Page 50: Access To The Gas Valve

    6.4.2 Removing the gas valve (Honeywell) CCESS TO THE ALVE Important! Before removing the gas valve, ensure the 6.4.1. Removing the spark generator gas supply is turned off. 1. Disconnect the ignition leads “A2” by pulling upward 1. Disconnect all the cables from the solenoid and .

  • Page 51: Access To The Water Circuit

    CCESS TO THE ATER IRCUIT Important! Before any component is removed, the boiler must be drained of all water. 6.5.1 Removing the D.H.W. (secondary) exchanger 1.Remove the condensate trap - see Section. 6.3.10; 2.Remove the screws “A6” (F 6.48); 3.Disconnect the cable “A7” (F 6.49);...

  • Page 52: 6.5.2 Removing The Pump Pressure Switch

    6.5.2 Removing the pump pressure switch 6.5.3 Removing the safety valve 1. Remove the pump pressure switch electrical connections 1. Disconnect the discharge pipe work from below the “A8” (F 6.52); boiler; 2. Unscrew the pump pressure switch by using a spanner on 2.

  • Page 53: Removing The Automatica

    6.5.4 Removing the automatic air vent 6.5.5 Removing the pump 1. Remove the U-clip “B1” (F . 6.58); 1. Remove the electrical connetction “ B2” (F . 6.61); 2. Remove valve complete with float using a screwdriver 2. Release the nut “B3” (F .

  • Page 54: Removing The Pressureg

    6.5.6 Removing the pressure gauge 1. Remove the U-clip “B8” (F . 6.67) 2. Push the pressure gauge through the control panel from the rear using a screwdriver (F . 6.68-6.69). . 6.64 . 6.67 . 6.65 . 6.68 . 6.66 .

  • Page 55: Removing The Expansionv

    6.5.7 Removing the expansion vessel 6.5.8 Removing the overheat thermostat 1. If rear exit flue, remove the flue; 1. Disconnect the overheat ther mostat electrical 2. Release nut “B9” (F . 6.70); connections “C2” (F . 6.73); 3. Remove back-nut “C1” (F .

  • Page 56: Removing The C.h. T Sensor (N.t.c.)

    6.5.9 Removing the C.H. temperature sensor (N.T.C.) 6.5.10 Removing the D.H.W. temperature sensor (N.T.C.) 1. Pull off the electrical connector and remove the sensor probe using a suitable spanner (F . 6.76-6.77). 1. Pull off the electrical connector and unscrew the sensor probe using a suitable spanner (F .

  • Page 57: Removing The D.h.w. Flow

    6.5.12 Removing the D.H.W. flow switch CCESS TO THE ONTROL YSTEM 1. Unplug the electrical connector “C5” (F . 6.80); Important! Isolate the electrical supply to the boiler 2. Remove the D.H.W. flow switch using a screwdriver before accessing the control panel. .

  • Page 58: Removing The Time Clock

    6.6.2 Removing the P.C.B. 1. Isolate electricity; 2. Remove the inspection cover from the reverse of the control panel, unscrew the screws “C7” (F . 6.85); 3. Unplug all electrical connections from the recuperator P.C.B on the reverse of inspection cover (F .
  • Page 59 6.6.3 Removing the time clock 1. Disconnect the electrical connections “D5” from the clock (F . 6.93); 2. Remove screws “D6” (F . 6.93); 3. Lift out the time clock from the control panel (F . 6.94). . 6.91 . 6.93 .

  • Page 60: Fault Finding

    These fault finding guides are not exhaustive. However, it FAULT FINDING is possible to detect and correct many defects by using the standard fault finding diagrams described in this chapter, ensure these guides are carried out in the set order. AULT INDING UIDE...
  • Page 61 IS THE PUMP RUNNING? POWER TO THE PUMP? 1. Check pump cable 2. Check/replace main P.C.B. THE LOW WATER PRESSURE SWITCH WORKING CORRECTLY? E02: does not close 1. Check if there is air in the system 2. Check the main circuit flow switch operation 3.
  • Page 62 IS THE FAN DOES CODE RUNNING? E33 APPEAR? 1. Check the fan cable 2. Replace the fan 3. Replace the main P.C.B. Replace the main P.C.B. 1. Check/replace ignition IGNITION electrode SPARKS ARE GENERATED 2. Check ignition cable REGULARLY? 3. Check/replace the main P.C.B. 1.

  • Page 63: Short Spare Parts List

    SHORT SPARE PART LIST 56 55 24 25 36 36 37 MODEL CODE SERIAL NO. REF. VALIDITY MICROGENUS 24 MFFI HE (UK) NG 3300025 2320429900001 MICROGENUS 28 MFFI HE (UK) NG 3300015 2320429900001 MICROGENUS 32 MFFI HE (UK) NG 3300026 2320429900001...
  • Page 64 code 65100547 code 65101257 code 65102576...
  • Page 65 G.C. part ARISTON Description Part. No. Motor (3-Way Valve) 997147 O-Ring 998424 Gasket (3/4”) 573520 Gasket (1/4”) 569390 Low Water Pressure Switch 998458 Temperature probe (DHW) 998458 Spark Generator 65100249 Pump 65101417 Clock 999599 Pressure Gauge 65100695 Air Pressure Switch...

  • Page 66: Technical Information

    TECHNICAL INFORMATION Name microGENUS HE 24 MFFI microGENUS HE 28 MFFI CE Certification 0051BP2805 0051BP2805 Flue Type Heat Input max/min 26.7 / 12.2 31.1 / 13.3 Heat Output max/min 23.3 / 10.4 27.0 / 11.4 Efficiency of Nominal Heat Input (60/80°C) 87.4...
  • Page 67 Name microGENUS HE 32 MFFI CE Certification 0051BP2805 Flue Type Heat Input max/min 35.0 / 13.3 Heat Output max/min 30.5 / 11.3 Efficiency of Nominal Heat Input (60/80°C) 87.1 Efficiency of Nominal Heat Input (30/50°C) 87.1 Efficiency at 30% of Nominal Heat Input (30°C) 86.9 Efficiency at Minum Input 84.8...
  • Page 68 BENCHMARK COMMISSIONING CHECKLIST...
  • Page 69 SERVICE INTERVAL RECORD...
  • Page 72 ERMS AND ONDITIONS OF UARANTEE Please read these terms and conditions which are in manufacturer’s guarantee has been withdrawn. addition to any terms and conditions detailed in this book On the 12 month anniversar y of the appliance or any registration card supplied with your appliance. installation, you must have it serviced to continue any guarantee offered into the following year.

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