Ariston micro Genus 23 MFFI Installation Instructions Manual Download Page 77

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PART. CODE DESCRIPTION

REF.

NOTE

321

997029

Operator coils (Sit Sigma)

331

998490

Central heating by-pass kit

332

998718

3-Way spring kit (C.H.)

333

998975

3-Way spring kit (D.H.W.)

334

998974

Heating actuator bush

351

998644

O-ring (A.A.V.)

352

998643

Auto Air Vent

353

998738

Gasket (pump head)

354

998961

Pump head

354

999207

Pump head

371

571547

Diaphragm (main flow switch)

372

571772

Magnet (main flow switch)

373

571771

Spring (main flow switch)

374

571770

Main flow switch top cap

375

998172

Main flow switch reed system

381

998716

Burner jet (full kit - NG)

382

998717

Burner jet (full kit - LPG)

NOTE DESCRIPTION

Not supplied as a spare part

Not illustrated

PART. NOTIFICATION OF CHANGES

Spares listed below are not interchangeable with those in Ed.1

999102 - Pipe (expansion vessel)

- replaces code 998584 from serial number: 2320005600001

999103 - Pipe (flow)

- replaces code 998815 from serial number: 2320005600001

999162 - Pump bracket

- replaces code 998606 from serial number: 2320005600001

999091 - Pump (27kW)

- replaces code 998336 from serial number: 2320005600001

999059 - Front cover

- replaces code 998827 from serial number: 2320005600001

999245 - Pressure guage

- replaces code 998625 from serial number: 2320005600001

998952 - Control panel

- not listed on original drawing

999153 - High voltage wiring

- replaces code 998859 from serial number: 2320005600001

999204 - Fan (23kW)

- replaces code 998621 from serial number: 2320005600001

998019 - Pipe (safety valve outlet)

- replaces code 573176 from serial number: 2320005600001

998433 - Burner jet (NG 1.30)

- replaces code 998714 from serial number: 2320005600001

999103 - Pipe (flow)

- replaces code 998815 from serial number: 2320005600001

999148 - Selector knob (comfort)

- replaces code 998605 from serial number: 2320005600001

999406 - Cable (time clock)

- not listed on original drawing

102

998963 - Panel (combustion chamber - R/H) - replaces code 998599 from serial number: 2320005600001

104

999245 - Pressure guage

- replaces code 998625 from serial number: 2320005600001

108

999151 - Panel (sealed chamber - front)

- replaces code 998610 from serial number: 2320005600001

333

998975 - 3-Way spring kit (DHW)

- replaces code 571447 from serial number: 2320005600001

334

998974 - Heating actuator bush

- replaces code 998013 from serial number: 2320005600001

354

999207 - Pump head (27kW)

- replaces code 998961 from serial number: 2320005600001

998953 - Cable holder cover

- not listed on original drawing

Summary of Contents for micro Genus 23 MFFI

Page 1: ...Installation Instructions Type C Boilers G C N 47 116 14 47 116 15 LEAVE THESE INSTRUCTIONS WITH THE END USER Country of destination GB...

Page 2: ...N 2 11 ELECTRICAL SYSTEM DIAGRAMS 2 12 WATER CIRCUIT DIAGRAMS 3 COMMISSIONING 3 1 INITIAL PREPARATION 3 2 CONTROL PANEL 3 3 REMOVING THE FRONT PANEL 3 4 INITIAL START UP 3 5 OPERATIONAL ADJUSTMENTS 3...

Page 3: ...h which this appliance operates is also shown on the label at the bottom of the boiler Do not install this appliance in a damp environment or close to equipment which spray water or other liquids Do n...

Page 4: ...ic hot water production efficiency flow rate and temperature 13 General check of the combustion by products of the discharge ventilation system 14 Check of the general performance of the unit LEGEND 1...

Page 5: ...d appliance is installed in a room containing a bath or shower the boiler and any electrical switch or appliance control utilising mains electricity should be situated so that it cannot be touched by...

Page 6: ...st be changed replace it with one with the same specifications Make the connections to the terminal board located within the control panel as follows The yellow green wire should be connected to the t...

Page 7: ...diagrams for the electrical system are indicated in section 2 11 Warning this appliance must be earthed External wiring to the appliance must be carried out by a qualified technician and be in accord...

Page 8: ...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 n...

Page 9: ...less than 2 metres above a balcony above ground or above a flat roof to which people have access then a suitable terminal guard must be fitted When ordering a terminal guard quote the appliance model...

Page 10: ...ntake by cutting it with a suitable knife see FIG 2 8 2 Insert the elbow into the air intake until it reaches the lower end There is no need to use gaskets or sealing componds 10 IMPORTANT For all flu...

Page 11: ...ms 60 100 Piping not insulated 41 restrictor 47 NONE NONE Piping insulated 41 restrictor 47 NONE NONE TABLE 2 1 Exhaust Type C12 xy C32 xy C42 xy C52 xy C82 xy Restrictor 41 mm L max 38 m L max 34 m M...

Page 12: ...OSTAT CONNECTION A TWIN PIPE SYSTEMS FIG 2 11 In calculating the lengths of the pipes the maximum length L must also take into consideration the values for the exhaust air intake end terminals as well...

Page 13: ...r N Overheat L E D O Temperature L E D s P Transformer Q Circulation Pump Relay R Fan Relay S Gas Valve Relay T Motorised Diverter Valve Relay V Spark Generator A01 Circulation Pump A02 Fan A03 Spark...

Page 14: ...Hot Water Temperature Probe 12 Secondary Heat Exchanger 13 Gas Valve 14 Domestic Water Inlet Filter 15 Pressure Gauge 16 Safety Valve 17 Circulation Pump with Automatic Air Release Valve 18 Domestic H...

Page 15: ...manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free Close the pump plug Continue filling the system until at least 1 bar registers on the pressure g...

Page 16: ...position 16 3 3 REMOVING THE FRONT PANEL B 1 2 3 4 5 A LEGEND A On Off knob B Domestic hot water temperature adjustment knob C Central heating selection winter and temperature adjustment knob D On Of...

Page 17: ...OWS 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 bar bring it up to the appropriate level Check to see...

Page 18: ...oiler is equipped with a device that limits the formation of Limescale in the secondary exchanger by controlling the temperature of the domestic hot water max 61 C and also controlling the temperature...

Page 19: ...3 9 DRAINING THE SYSTEM 5 ANTI FROST DEVICE The boiler is equipped with a device that in the event of the water temperature going below 5 C the 3 way diverter valve switches to domestic hot water and...

Page 20: ...NG THE TYPE OF GAS The outlet pressure of the gas cock is obtained by completely loosening the screw on the solenoid The maximum pressure of the gas to the burner will be equal to the nominal delivery...

Page 21: ...ck of the primary heat exchanger check for overheating in the blade assembly clean the exhaust fan if needed 8 Adjustment of the flow rate of the gas flow rate for lighting partial load and full load...

Page 22: ...2 Link 2 3 6 Sunvic DHP 2201 6 3 E 1 2 Towerchron FP 6 10 2 1 Link 1 5 4 7 9 Towerchron MP 6 10 2 1 Link 1 4 6 11 Towerchron 2000 HW HTG N L ON ON ACL LS522 LS722 3 4 N L Randall 922 972 3 6 E N L Lin...

Page 23: ...3 1 N L Sunvic ET 1451 7 4 E 1 2 Link 2 3 6 Sunvic DHP 2201 6 3 E 1 2 Towerchron FP 6 10 2 1 Link 1 5 4 7 9 Towerchron MP 6 10 2 1 Link 1 4 6 11 Towerchron 2000 HW HTG N L ON ON ACL LS522 LS722 3 4 N...

Page 24: ...ax T 20 C mbar Residual Head of System bar Heating Temperature max min C Domestic Hot Water Temperature max min C D H W Flow Rate T 35 C l min D H W Flow Rate T 35 C gal min D H W Minimum Flow Rate l...

Page 25: ...Servicing Instructions Type C Boilers G C N 47 116 14 47 116 15 LEAVE THESE INSTRUCTIONS WITH THE END USER Country of destination GB...

Page 26: ...he spark generator Removing the gas valve 1 5 ACCESS TO THE WATER CIRCUIT Removing the D H W secondary exchanger Removing the safety valve Removing the automatic air vent Removing the main circuit flo...

Page 27: ...f the individual parts are given in the following pages 1 1 REPLACEMENT OF PARTS 1 2 TO GAIN GENERAL ACCESS All testing and maintenance operations on the boiler require the control panel to be lowered...

Page 28: ...hamber frontal cover from the locating pins FIG 1 7 FIG 1 6 C C FIG 1 7 Removing the side panels 1 Remove the four screws D for each side panel FIG 1 8 2 Pull the panel away from the boiler then lift...

Page 29: ...lose to the P C B Fig 1 14 FIG 1 13 G FIG 1 14 Removing the burner and jets 1 Remove the screws F from the burner FIG 1 11 2 Remove the burner FIG 1 12 3 Remove the jets using a No 7 socket spanner 4...

Page 30: ...that the cables have been connected correctly c Check that the rubber gasket covers the cable electrode connection point completely FIG 1 15 FIG 1 16 H 1 Drain the boiler of water 2 Release the overh...

Page 31: ...Removing the fan 1 Disconnect the electrical connections K and silicon pipes L from their connection points FIG 1 20 2 Remove screws M on the top of the sealed chamber FIG 1 21 3 Unscrew to remove swi...

Page 32: ...w F Turn the screw clockwise to increase the pressure and coun ter clockwise to decrease the pressure displayed on the pressure gauge corresponding to the minimum power see TABLE A page 9 6 When you h...

Page 33: ...ting the heating power for propane gas G31 23 MFFI 2 70 20 11 0 2 0 1 16 2 01 Kg h 0 87 Kg h 27 7 mbar 6 0 mbar 28 mbar 12 x 0 77 2 00 Kg h 0 85 Kg h 35 5 mbar 7 3 mbar 37 mbar 12 x 0 77 27 MFFI 3 15...

Page 34: ...e gauge and connect screw C to the pressure outlet in order to seal off the gas 11 Carefully check the pressure outlets for gas leaks valve inlet and outlet IMPORTANT Whenever you disassemble and reas...

Page 35: ...replacing the exchanger ensure that the O rings are in good condition and replace if necessary 1 6 ACCESS TO THE WATER CIRCUIT FIG 1 30 FIG 1 31 FIG 1 32 FIG 1 33 W X X Removing the gas valve 1 Discon...

Page 36: ...nscrew valve top A1 FIG 1 38 2 Remove valve Fig 1 39 Removing the main circuit flow switch 1 Remove the cable of the main circuit flow switch B1 FIG 1 40 2 Remove the screws C1 FIG 1 41 3 Remove the m...

Page 37: ...G 1 42 3 Remove the U clip F1 FIG 1 43 4 Release the nut G1 FIG 1 44 5 Remove the pipe H1 FIG 1 45 6 Remove the screws I1 FIG 1 46 7 Remove the pump FIG 1 47 D1 FIG 1 41 FIG 1 42 FIG 1 43 FIG 1 44 E1...

Page 38: ...FIG 1 52 4 Remove the expansion vessel FIG 1 53 Removing the pressure gauge 1 Remove the U clip J1 and remove the pressure gauge coupling FIG 1 48 2 Push the pressure gauge through the control panel...

Page 39: ...54 FIG 1 55 Removing the D H W temperature sensor N T C 1 Pull off the electrical connector Q1 and unscrew the sensor probe using a suitable spanner FIG 1 57 FIG 1 57 Removing the divertor valve actu...

Page 40: ...e the fuses FIG 1 61 1 6 ACCESS TO THE CONTROL SYSTEM Removing the time clock 1 Unplug electrical connection W1 from the clock FIG 1 62 2 Remove the screws W2 see fig 1 63 3 Remove the clock from the...

Page 41: ...panel 3 Unplug all electrical connections from the P C B FIG 1 65 4 Remove the screws X1 FIG 1 66 5 Separate the facia panel from the rear of the control panel FIG 1 67 7 Remove the screws Y1 and remo...

Page 42: ...T DEVICE PROTECTION IS ACTIVATED IF HEATING TEMP IS 5 C MUST TIME CLOCK AND OR ROOM THERMOSTAT BE ACTIVATED A ECONOMY COMFORT SELECTOR TEMP C H 34 C Comfort Comfort Economy Economy 1 There is sufficie...

Page 43: ...in the system 2 Check main circuit flow switch operation 3 Check pressure on the water gauge and fill system to return to 1 bar 1 Turn the boiler off then on protection reset 1 Check that the pump is...

Page 44: ...onnection cable 3 Check replace P C B 1 Check replace air pressure switch 2 Check if reset button is jammed 3 Check replace flame detection electrodes 1 Check replace connection cable 2 Check replace...

Page 45: ...k replace P C B 1 Check power supply of gas valve 2 Check replace P C B 3 Check efficiency of gas valve 4 Replace gas valve Shutdown L E D off fan restarts IS THE AIR PRESSURE SWITCH ACTIVATED CHECK P...

Page 46: ...ty D H W flow switch faulty 3 way valve check C H D H W temperature probes check gas pressures check water flow rate check secondary heat exchanger primary heat exchanger faulty or lime scale deposits...

Page 47: ...D O Temperature L E D s P Transformer Q Circulation Pump Relay R Fan Relay S Gas Valve Relay T Motorised Diverter Valve Relay V Spark Generator U Anti cycling Device Adjustment for Heating A01 Circul...

Page 48: ...24 B063 microGENUS 23 27 MFFI J K Blk Blk Gry Gry Pnk Pnk Pnk Gry Gry Wh Wh Wh Wh Wh Wh Wh Rd Blk Rd Blk Rd Blk Blk Blk Blk Brn Brn Brn Brn Blk Blk SE017A U J K M L R S Q T O N SF014A...

Page 49: ...71 72 102 71 74 107 108 106 104 64 103 14 56 58 9 56 56 81 73 37 39 93 97 44 88 78 79 66 65 68 67 51 52 50 94 334 331 332 333 code 998613 311 code 998940 codes 998836 354 353 352 351 371 372 373 374 3...

Page 50: ...2 E61 654 E61 656 E61 660 E62 030 E24 077 E24 077 E24 076 E24 075 E61 663 E61 665 E61 667 Expansion vessel Gasket 3 8 O ring Gasket 3 4 Motor 3 Way valve Fixing clip motor Temperature probe C H W Flow...

Page 51: ......

Page 52: ...oni TermoSanitari SpA Italy Commercial subsidiary MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 internet http www mtsgb ltd uk E mail...

Page 53: ...Users Manual...

Page 54: ...i e by the gas meter Your local MTS Servicing Centre is at your complete disposal for all requirements The guarantee on this appliance is valid for 24 months from the first day of installation Repairs...

Page 55: ...UBLESHOOTING page 14 4 MAINTENANCE page 16 5 CHANGE OF GAS TYPE page 16 6 TIME CLOCK page 17 IMPORTANT Please read this manual carefully For additional information please consult the Installation and...

Page 56: ...e used only for the purpose for which it is designed The manufacturer declines all liability for damage caused by improper or negligent use Do not allow children or inexperienced persons to use the ap...

Page 57: ...ater for Domestic Use Working pressure max min Flow rate T 25 C Flow rate T 35 C Minimum flow rate ELECTRICAL DATA Electrical Supply Frequency Power Consumption Protection of Electrical System CATEGOR...

Page 58: ...6 CONTROL PANEL 23 27 MFFI FR025A...

Page 59: ...nt knob D On Off L E D green E Fume sensor L E D yellow F Ignition failure lockout L E D red G Economy Comfort mode selection knob H Ignition failure lockout and or overheat reset button I Overheat L...

Page 60: ...is recommended that the boiler is serviced annually by a competent person If it is known or suspected that a fault exists on the appliance it must not be used until the fault has been corrected by a c...

Page 61: ...limescale in the boiler exchangers This will ensure that the efficiency of the unit remains the same over time reducing gas consumption and maintenance costs If the boiler should be out of use for a...

Page 62: ...ety devices will shut off the gas and the red L E D F illuminates To reset the ignition system the reset H must be pressed and released Should the boiler fail to ignite a second time check that the ex...

Page 63: ...ing system by adjusting the knob C By positioning the indicator somewhere between min and max a temperature may be obtained which varies from approximately 45 C to about 80 C The water temperature in...

Page 64: ...l i v e r y temperature for the water may be chosen in a range from 36 C to about 56 C depending on the flow rate of the water and the position of the knob between the min and max settings ECONOMY CO...

Page 65: ...ice TURNING OFF CENTRAL HEATING To turn off the central heating rotate the C knob to the 0 position The boiler will stay in summer mode just p r o v i d i n g domestic water on request TURNING OFF THE...

Page 66: ...the ignition the button H must be pressed and released Should the boiler fail to ignite a second time check that the external gas cock is open If the problem persists contact an Authorised Service Ce...

Page 67: ...ed contact an Authorised Service Centre If there are frequent drops in pressure within the system have a plumber check the heating system for possible water leaks TEMPORARY SHUTDOWN DUE TO DEFECTIVE D...

Page 68: ...the water in the boiler has reached a temperature of about 50 C This device is only activated when the boiler is operating perfectly and the system pressure is sufficient the boiler is powered electr...

Page 69: ...and then the boiler starts if the room thermostat if installed or the heating thermostat require heat heating function on EXAMPLE To set the heating of your home in the time interval from 7 00 am to...

Page 70: ...three positions see figure 1 Position I CONSTANT in this position the clock circuit is always closed switch on therefore the boiler will constantly be on and will only shut off upon the request of the...

Page 71: ...19 TECHNICAL DATA Ambient temperature 10 C to 55 C Running reserve 150 h not for 1 5 V DC Shortest switching time 15 minutes Programmable Every 15 minutes...

Page 72: ...fe Recanati Manufacturer Merloni TermoSanitari SpA Italy Commercial subsidiary MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 Technica...

Page 73: ...SPARE PARTS EXPLODED VIEW WALL HUNG GAS BOILERS Models microGENUS 23 MFFI microGENUS 27 MFFI Edition 2 Current from Serial No 2320005600001to 2320021400002...

Page 74: ...87 83 82 84 86 14 85 69 70 71 72 102 71 74 107 108 106 104 64 103 14 56 58 9 56 56 81 73 37 39 93 97 44 88 78 79 66 65 68 67 51 52 50 94 334 331 332 333 code 998613 311 code 998940 codes 998836 354 3...

Page 75: ...7182 Gasket 32 999100 Lock washer 33 998836 Pump AB 33 999091 Pump CD 34 998570 L E D 35 998575 Spindle temperature knob 36 998603 Control knob 37 998572 Spindle on off knob 38 997207 Time clock 39 99...

Page 76: ...73576 Compensation tube 83 573325 Rivet 84 569443 Silicone seal 85 572138 Burner jet washer 86 998433 Burner jet NG 1 30 AC 86 998434 Burner jet LPG 0 77 BD 87 998729 Pipe gas valve 88 998732 Pipe C H...

Page 77: ...8827 from serial number 2320005600001 43 999245 Pressure guage replaces code 998625 from serial number 2320005600001 44 998952 Control panel not listed on original drawing 48 999153 High voltage wirin...

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Ariston micro Genus 23 MFFI, Installation Instructions Manual

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