Download
Share
Print this page
Ariston microGENUS II 24 MFFI Installation And Servicing Instructions
  1. Manuals
  2. Brands
  3. Ariston Manuals
  4. Boiler
  5. microGENUS II 31 MFFI
  6. Installation and servicing instructions
Ariston microGENUS II 24 MFFI Installation And Servicing Instructions

Ariston microGENUS II 24 MFFI Installation And Servicing Instructions

Type c boilers
Hide thumbs Also See for microGENUS II 24 MFFI:

Advertisement

Quick Links

Download this manual
microGENUS II 24 MFFI
microGENUS II 28 MFFI
microGENUS II 31 MFFI
Installation and Servicing
Instructions
Type C Boilers
G.C.N: 47-116-25 (24kW)
G.C.N: 47-116-26 (28kW)
G.C.N: 47-116-27 (31kW)
LEAVE THESE INSTRUCTIONS WITH
THE END-USER
Country of destination: GB, IE

Advertisement

loading

Related Manuals for Ariston microGENUS II 24 MFFI

Summary of Contents for Ariston microGENUS II 24 MFFI

  • Page 1 II 24 MFFI microGENUS II 28 MFFI microGENUS II 31 MFFI Installation and Servicing Instructions Type C Boilers G.C.N: 47-116-25 (24kW) G.C.N: 47-116-26 (28kW) G.C.N: 47-116-27 (31kW) LEAVE THESE INSTRUCTIONS WITH THE END-USER Country of destination: GB, IE...
  • Page 2 TABLE OF CONTENTS 6.3.1 R 1. GENERAL INFORMATION EMOVING THE . 35 OMBUSTION HAMBER 6.3.2 R EMOVING THE URNER ENERAL NSTRUCTIONS . 35 VERALL 6.3.3 R EMOVING THE . 35 LECTRODES 2. INSTALLATION 6.3.4 R EMOVING THE . 36 XCHANGER EFERENCE TANDARDS 6.3.5 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 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 Domestic Hot Water Temperature Probe Drain Valve Low Water Pressure Switch Secondary Heat Exchanger...
  • Page 5 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, in GB the current I.E.E.
  • Page 6 VERALL IMENSIONS EGEND A = Central Heating Flow (3/4”) B = Domestic Hot Water Outlet (1/2”) C = Gas Inlet (3/4”) D = Domestic Cold Water Inlet (1/2”) E = Central Heating Return (3/4”) . 2.1 LEARANCES In order to allow access to the interior of the boiler for maintenance purposes, the boiler must be installed in compliance with the minimum clearances indicated in F .
  • Page 7 secure with the wall screws 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. 2.5.2. Position the appliance on the hanging bracket and connect the connection kit to the boiler connections.
  • Page 8 ONNECTION 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 9 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. The discharge must not be over an entrance or a window or any other type of public access.
  • Page 10 ONNECTIONS YSTEM The provision for satisfactory flue termination must be made in GB this must be in accordance with BS 5440-1, for IE recommendations are given in the current edition of I.S.813. The appliance must be installed so that the flue terminal is exposed to outside air.
  • Page 11 ITTING THE OAXIAL ORIZONTAL (For Telscopic, Vertical Flue and Twin Pipe Instructions Ø 60/100 mm see page 12) ONTENTS (60mm) ILICONE LBOW & E EALS NTERNAL XTERNAL LUMINIUM IPE INCLUDING ERMINAL METRE 60/100) LAMPS CREWS EALS Once the boiler has been positioned on the wall, insert the elbow into the socket (F 2.7) and rotate to the required position.
  • Page 12 e.g. X = 508mm + 22mm = 530mm 860 - 530 = 330mm (Length to be cut from the plain end of the 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 through the flue through the hole, once the wall seal has passed through the hole, pull...
  • Page 13 The Vertical flue kits maximum and minimum useable lengths with both flat and pitched roof flashings are indicated in (Figs. 2.14 & 2.15). Before proceeding to fit the flue, ensure that the maximum flue length has not been exceeded and that all elbows and bends have been taken into consideration, the maximum flue length is 5 metres, for each additional elbow 1 metre must be subtracted from the total flue...
  • Page 14 Considerations necessary for twin flue installation; It is most important to avoid any possible condense formation entering the appliance. According to Table 2.1 (Page 17) decide if condensation will form within the flue. If yes, there are two options; 1) Where condense will form but can be negated with insulated flue, install insulated the flue with a fall of 5mm in every metre away from the boiler.
  • Page 15 and the air intake must not be sited above the exhaust terminal (refer to F . 2.21). The air intake pipe can be run horizontally, however, the terminal and the final 1 metre of flue must be installed with a fall away from the boiler to avoid rain ingress.
  • Page 16 . 2.20 RAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY AIR INTAKE MUST NOT BE FITTED ABOVE THE EXHAUST AIR INTAKE EXHAUST AIR INTAKE 2.21 HERE MM CENTRES CANNOT BE ACHEIVED THE EXHAUST TERMINAL CAN BE EXTENDED TO PROTRUDE FROM THE WALL BY...
  • Page 17 ABLE Use the Do not use the Maximum Exhaust Risk of Condensation Forming Type ø 41 mm Restrictor Flue 24 MFFI Restrictor Length Between 1m - 4m Coaxial Between NOT APPLICABLE NOT APPLICABLE Systems 500 mm - 1 m Between 1m - 5m ø...
  • Page 18 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 19 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 20 2.14 LECTRICAL YSTEM IAGRAMS . 2.23 CN203 CN206 CN200 CN304 CN201 CN300 FUSE FUSE CN205 ATTENTION When replacing P.C.B. disconnect the EEPROM key (leave it attached to the control panel) and reconnect to the new PCB. CN206 CN203 CN201 CN303 CN302 CN205 A - Dip Switch:...
  • Page 21 2.15 ATER IRCUIT IAGRAM . 2.24 14 15 SI016C EGEND Heat Exchanger Overheat Thermostat Central Heating Flow NTC Burner Detection Electrode Ignition Electrodes Diverter Valve Low Water Pressure Switch 10. Drain Valve 11. Domestic Hot Water NTC 12. Secondary Heat Exchanger 13.
  • Page 22 COMMISSIONING NITIAL REPARATION MTS (GB) Limited support the initiative. Within the other appliances when they are in use at the same the information pack you will find a copy of the time. logbook. It is important that this is completed in the presence of your customer, they are shown how to use it, Pipework must be of an adequate size.
  • Page 23 NITIAL TART HE CHECKS TO BE RUN BEFORE INITIAL START UP ARE AS 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 24 OMBUSTION NALYSIS The flue connector has two apertures, readings can be taken for the temperature of the combustion by-products and of the combustion air, as well as of the concentrations of O and CO , etc. To access these intakes it is necessary to unscrew the front screw and remove the metal plate with sealing gasket.
  • Page 25 SAFETY SHUTDOWN “E” In the event of a safety cut-off (displayed with the code shown in the table), the boiler will automatically try to reset itself and relight. Should this not be the case, contact an authorised Service Centre for assistance. DISPLAY CAUSE E E 0 0 2 2...
  • Page 26 3.10 RAINING THE YSTEM NSTRUCTING 1. Hand over the copy of the End User Instructions supplied RAINING THE EATING YSTEM The heating system must be drained as follows: with the appliance, together with these instructions, and explain how to use the timeclock and room thermostat. Turn off the boiler;...

  • Page 27: Gas Adjustments

    Lower Wobbe Index (15°C;1013mbar) MJ/m 45.67 80.58 80.58 Nominal Delivery Pressure mbar microGenus II 24 MFFI Main Burner: n. 14 jets (ø) 1.25 0.72 0.72 Consumption (15°C; 1013mbar) max - min 2.80 - 1.16 Consumption (15°C; 1013mbar) max - min Kg/h 2.09 - 0.87...
  • Page 28 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. 2. To do this, loosen the screw “A”. Fit the pipe of the pressure gauge to the inlet pressure connection of the gas valve “B”...
  • Page 29 Setting the maximum heating circuit power 7. To set the maximum heating circuit power, turn the On/Off knob to the “ON” position and set the time clock and any external controls to the “ON” position. Turn the CN203 CN206 CN200 knob of the heating thermostat clockwise to maximum.
  • Page 30 II 24 MFFI NATURAL GAS (G20) mbar 3.75 4.75 5.75 LIQUID GAS (G30) mbar 12.5 15.5 18.5 LIQUID GAS (G31) mbar 15.5 microGENUS II 28 MFFI NATURAL GAS (G20) mbar 2.75 LIQUID GAS (G30) mbar 10.5 15.5 18.5 LIQUID GAS (G31) mbar 14.5...
  • Page 31 . 4.1 Regulating the heating power for natural gas (G20) modello 24 model 24 model 28 modello 28 model 31 modello 31 Regulating the heating power for butane gas (G30) modello 24 model 24 model 28 modello 28 modello 31 model 31 Regulating the heating power for propane gas (G31)
  • Page 32 MAINTENANCE It is recommended that the following inspections be carried out on the boiler at least once a year: 1 - Check the seals for the water connections; replace any faulty seals. 2 - Check the gas seals; replace any faulty gas seals. 3 - Visual check of the entire unit.

  • Page 33: Servicing Instructions

    2. The control rotates on two lateral hinges; the panel stays in a SERVICING INSTRUCTIONS horizontal position, which allows access to the inner parts of the boiler (F . 6.2); To ensure efficient safe operation, it is recommended that the 3.
  • Page 34 6.2.2 Removing the sealed chamber front cover 6.2.3 Removing the side panels 1. Remove the screws “C” (F 1. Remove the four screws “D” for each side panel (F . 6.5); .6.7); 2. Lift the sealed chamber front cover from the locating pins 2.
  • Page 35 CCESS TO THE OMBUSTION HAMBER 6.3.1 Removing the combustion cover 1. Remove the screws “E” (F . 6.9); 2. Lift off the combustion cover. . 6.9 Fig. 6.11 6.3.3 Removing the electrodes Before carrying out this procedure, unscrew and slide the burner forward (see previous section).
  • Page 36 6.3.4 Removing the main heat exchanger 1. Drain the boiler of water; . 6.14 2. Remove the side panels (see 6.2.3) 3. Remove the overheat thermostat sensor “I” (F . 6.16); 4. Remove the clips “J” (F . 6.16); 5. Release the connection nut “K” (F .
  • Page 37 6.3.5 Removing the air pressure switch 1. Disconnect the electrical connections “M” and silicone pipes “N” from their connection points (F . 6.21); 2. Remove screws “O” on the top of the sealed chamber . 6.22); 3. Lift out the air pressure switch (F .
  • Page 38 6.3.6 Removing the fan CCESS TO THE ALVE 6.4.1. Removing the spark generator 1. Disconnect electrical connections “P” and silicone pipe (HONEYWELL Gas Valve) “Q” (F .6.24); 2. Remove screw “R” and remove the fan collar clamp “R” 1. Disconnect ignition leads “T” by pulling upward .6.25);...
  • Page 39 6.4.2 Removing the gas valve (Honeywell) CCESS TO THE ATER IRCUIT Important! Before removing the gas valve, ensure the Important! Before any component is removed, the boiler gas supply is turned off. must be drained of all water. 1. Disconnect all the cables from the solenoid and 6.5.1 Removing the D.H.W.
  • Page 40 6.5.2 Removing the pump pressure switch 1. Remove the pump pressure switch electrical connections “Z” (F 6.38); 2. Unscrew the pump pressure switch by using a spanner on the nut (F 6.39); 3. Remove the pump pressure switch (F 6.40). .
  • Page 41 6.5.3 Removing the safety valve 6.5.4 Removing the automatic air vent 1. Remove the U-clip “B1” (F . 6.44); 1. Disconnect the discharge pipe work from below the 2. Remove valve complete with float using a screwdriver boiler; 6.45-F 6.46). 2.
  • Page 42 6.5.5 Removing the pump 1. Remove the electrical connection “ C1” (F . 6.47); 2. Release the nut “D1” (F . 6.48); 3. Remove the retaining clip “E1” from the bottom of the boiler (F . 6.49); 4. Remove the screw “F1” (F .
  • Page 43 6.5.6 Removing the pressure gauge 6.5.7 Removing the expansion vessel 1. Remove the U-clip “I1” (F 1. Release nut “J1” (F . 6.53) . 6.56); 2. Lift the pressure gauge from the rear of the control 2. Remove back-nut “K1” (F .
  • Page 44 6.5.8 Removing the overheat thermostat 6.5.9 Removing the C.H. temperature probe (N.T.C.) 1. Disconnect the overheat ther mostat electrical 1. Pull off the electrical connector and remove the sensor connections “L1” (F . 6.59); probe. (F . 6.62-6.63). 2. Then remove the thermostat from its mounting by releasing the securing clip (F .
  • Page 45 6.5.10 Removing the D.H.W. temperature sensor 6.5.12 Removing the D.H.W. flow switch (N.T.C.) 1. Unplug the electrical connector “O1” (F . 6.66); 1. Pull off the electrical connector and unscrew the 2. Remove the D.H.W. flow switch using a screwdriver sensor probe using a suitable spanner (F .
  • Page 46 6.6.1 Checking the fuses CCESS TO THE ONTROL YSTEM 1. Remove the inspection cover on the reverse of the Important! Isolate the electrical supply to the boiler control panel and unscrew the screws “P1”(F . 6.69); before accessing the control panel. 2.
  • Page 47 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 “Q1” (F . 6.71); 3. Unplug all electrical connections from the P.C.B (F 6.72); 4. Carefully unplug the EEPROM key “R1” (F .
  • Page 48 6.6.3 Removing the time clock 1. Disconnect the electrical connections “U1” from the clock (F . 6.78); 2. Remove screws “V1” (F . 6.78); 3. Lift the time clock out from the control panel (F . 6.79). . 6.78 . 6.79...

  • Page 49: 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 50 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 reset 1. Check if there is air in the system 2. Check the main circuit flow switch operation 3.
  • Page 51 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 52: Exploded View

    EXPLODED VIEW 19 20 30 30 31...
  • Page 53 HORT PARES ARISTON Description Part No. Expansion vessel 998616 998077 O-ring 997147 Motor (3- Way valve) Gasket 3/4" 573520 Flow group 65100547 Gasket 1/4" 569390 Low water pressure switch 995903 Temperature probe (D.H.W.) 998458 65101427 Return group (24 MFFI) 65101257...

  • Page 54: Technical Information

    TECHNICAL INFORMATION Name microGenus II 24 MFFI microGenus II 28 MFFI CE Certification 0694BO4008 0051BO2494 Flue Type Heat Input max/min 29.4 / 12.2 33.1 / 13.3 Heat Output max/min 24.8 / 9.7 28 / 10.5 Efficiency of Nominal Heat Input 84.3...
  • Page 55 Name microGenus II 31 MFFI CE Certification 0694BO4008 Flue Type Heat Input max/min 37.2 / 15.5 Heat Output max/min 31.1 / 12.1 83.6 Efficiency of Nominal Heat Input Efficiency at 30% of Nominal Heat Input Efficiency at Minum Input 78.1 SEDBUK Rating Band Heat Loss to the Casing (T=50°C)
  • Page 56 Manufacturer: Merloni TermoSanitari SpA - Italy 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...