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Ariston A/27 MFFI manual

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Table of contents for the manual

  • Page 1

    A/23 MFFI - A/27 MFFI G.C .N. 47-116-10 / 47-116-12 Installation Instructions T ype C Boilers LEA VE THESE INSTRUCTIONS ADJA CENT TO THE GAS METER Countr y of destination: GB[...]

  • Page 2

    2 B023 T ABLE OF CONTENTS 1. GENERAL INFORMA TION 1.1 General Instructions 1.2 T echnical Information 1.3 Ov erall View 2. INST ALLA TION 2.1 Ref erence Standards 2.2 Siting the Appliance 2.3 Ov erall Dimensions 2.4 Clearances 2.5 Mounting the Appliance 2.6 Electrical Connection 2.7 Gas Connection 2.8 W ater Connections 2.9 Flue Connection 2.10 Roo[...]

  • Page 3

    3 B023 This manual is an integr al and essential par t of the product. It should be kept with the appliance so that it can be consulted by the user and our authorised personnel. Please carefully read the instructions and notices about the unit contained in this manual, as the y provide impor tant information regarding the saf e installation, use an[...]

  • Page 4

    CE Cer tification Heat Input max/min kW 25.6/11.0 Heat Output max/min kW 23.1/9.2 Efficiency of Nominal Heat Input % 90.2 Efficiency at 30% of Nominal Heat Input % 87.8 Heat Loss to the Casing (³T=50°C) % 1.2 Flue Heat Loss with Burner Operating % 8.6 Flue Heat Loss with Burner Off % 0.4 Maximum Discharge of Fumes (G20-G25) Kg/h 59 Residual Disch[...]

  • Page 5

    5 B023 A/23 MFFI - A/27 MFFI Legend: 1. Flue Connector 2. Combustion Chamber Hood 3. Main Heat Exchanger 4. Combustion Chamber Insulation P anel 5. Burner 6. Expansion V essel 7. Ov erheat Ther mostat 8. Spark Generator 9. Diverter V alv e 10. Main Circuit T emperature Probe 11. Main Circuit Flo w Switch 12. Div er ter V alv e Microswitch 13. Filte[...]

  • Page 6

    6 B023 The technical inf or mation and instructions provided herein below are intended f or the installer so that the unit may be installed correctly and saf ely . The installation and initial star t up of the boiler m ust be by a CORGI Approv ed Installer in compliance with the installation standards currently in eff ect, as well as with any and a[...]

  • Page 7

    7 B023 Legend: A = Central Heating Flow (3/4”) B = Domestic Hot W ater Outlet (1/2”) C = Gas Inlet (3/4”) D = Domestic Cold W ater Inlet (1/2”) E = Central Heating Return (3/4”) 2.3 Overall Dimensions 890 365 (A-B-D-E) (C) 465 In order to allow f or access to the interior of the boiler for maintenance purposes, the boiler must be installe[...]

  • Page 8

    8 B023 F asten the boiler in place using the template and anchors supplied with the unit. It is highly recommended that a spirit lev el be used to position the boiler so that it is perf ectly lev el. F or additional information, please consult the instructions contained in the connection kit and the flue kit. F or safety purposes, hav e a competent[...]

  • Page 9

    9 B023 2.9 W ater Connections Legend A = Central Heating Flow B = Domestic Hot W ater Outlet C = Gas Inlet D = Domestic Cold W ater Inlet E = Central Heating Return I = Saf ety V alve Central Heating Detailed recommendations are given in BS 6798:1987 and BS 5449-1:1990, the f ollowing notes are giv en for gener al guidance. Pipe W or k: Copper tubi[...]

  • Page 10

    10 B023 public access . Air Release P oints: These must be fitted at all high points where air naturally collects and m ust be sited to f acilitate complete filling of the system. The appliance has an integral sealed e xpansion v essel to accommodate the increase of water v alue when the system is heated. It can accept up to 7 l (1.5 gal) of e xpan[...]

  • Page 11

    TERMINAL POSITION mm A - Directly below an open windo w or other opening 300 B - Below gutters , solid pipes or drain pipes 75 C - Below ea ves 200 D - Below balconies or car-port roof 200 E - F rom vertical drain pipes and soil pipes 75 F - F rom internal or external cor ners 300 G - Abov e ground or below balcon y lev el 300 H - F rom a surf ace [...]

  • Page 12

    12 B023 This procedure must be done as f ollows: 1 - Remov e the air vent intak e you w ant to use, in the area indicated in Fig. 2.8, b y breaking the perfor ated r ing. 2 - Use a tool to gr asp the lid and remov e it completely . 3 - Clean any b urrs or shar p edges with a knif e or an appropr iate tool. In Fig. 2.10 below , se veral diff erent t[...]

  • Page 13

    13 B023 In calculating the lengths of the pipes, the maximum length m ust also take into consideration the v alues for the e xhaust/air intak e end ter minals, as well as 90° elbows f or coaxial systems. The C52 types must comply with the f ollowing requirements: 1. The discharge/intak e v ent pipes must hav e the same diameter of ø 80 mm. 2. The[...]

  • Page 14

    14 B023 5 Remov e the grommet “D” shown in photo 5, mak e a hole in it and pass the room ther mostat wire through. 6 Remov e the link located on the ter minal and connect the wire. 7 Replace the grommet and the terminal to their or iginal positions, close the cov er on the grommet compar tment and f asten the wire-clamp “C” in place. 8 If a[...]

  • Page 15

    15 B023 2.11 Electrical Diagram Legend: A T = High V oltage P .C .B. BT = Low V oltage P .C .B. B = Flame F ailure L.E.D . C = Insufficient W ater Pressure L.E.D . D = W ater T emperature Indicator L.E.D .s E = Overheat Thermostat Warning L.E.D . F = System Reset Button G = Selector Knob f or Operating Mode H = Domestic Hot W ater T emp . Adjustmen[...]

  • Page 16

    16 B023 A/23 MFFI - A/27 MFFI EX C-MI/FFI 8 A/23 MFFI - A/27 MFFI[...]

  • Page 17

    2.12 W ater Cir cuit Diagram 17 B023 A/23 MFFI - A/27 MFFI Legend 1. Air Pressure Switch 2. F an 3. Main Heat Exchanger 4. Main Burner 5. Ignition Electrodes Detection Electrode 6. Gas V alv e 7. Ov erheat Ther mostat 8. Main Circuit T emperature Probe 9. Div er ter V alv e 10. Main Circuit Flo w Switch including Saf ety Pressure Switch for Primar [...]

  • Page 18

    40 50 60 70 80 C C 3.3 Contr ol P anel A - Ignition Loc kout Reset Button/Saf ety (Overheat)Thermostat Reset B - Ignition Loc kout L.E.D . C - Selector Knob for Summer/Winter/Flue Analysis Modes* D - Low System W ater Le vel L.E.D . E - T emperature Adjustment Knob f or Domestic Hot W ater F - Heating System Thermometer G - Saf ety (Ov erheat)Ther [...]

  • Page 19

    19 B023 3.4 Initial Start-up The chec ks to be run before initial start-up are as follows: 1. Make sure that: - the screw on the automatic air v alve has been loosened when the system is full; - If the water pressure in the system is below 1 bar , br ing it up to the appro- priate lev el; - Check to see whether the gas cock is closed; - Make sure t[...]

  • Page 20

    20 B023 The boiler is designed to make it easy to analyse the comb ustion by-products . Using the especially designed aper tures, readings can be tak en on the temperature of the comb ustion by-products and of the comb ustion air , as well as of the concentrations of O 2 and CO 2 , etc. The best maximum-pow er test conditions for the heating system[...]

  • Page 21

    21 B023 off status. After the system has been allowed to cool, the system can be reset by pressing the b utton “A”. 4 - Limescale Build-up This is an indirect control (actuated through the regulation of the temperature in the primar y heat exchanger) on the f ormation of limescale in the secondar y heat e xchanger . Regardless of the flow r ate[...]

  • Page 22

    22 B023 4.1 Changing the T ype of Gas The boiler can be con verted to use either methane (natural) gas (G20) or LPG (G30 - G31) by an A uthorised Service Centre. The operations that must be perf ormed are the follo wing: 1. Replace the jets on the main burner (see table in section 4); 2. Adjust the maximum and minimum thermal capacity values f or t[...]

  • Page 23

    6. MISCELLANEOUS 6.1 Wiring Diagram f or T wo Heating Zones V4043H VA LV E BRO WN 8 BLUE 2 GREY 9 ORANGE 10 GREEN/YELLO W 3 Honeywell ST 699B 1002 63 N L Link L-5-8 ST 6400/ST 6300 ST 6200 3 4 N L Drayton T empus 7 3 4 N L Horstmann 425, 525, 527 14 E N L Link L-2-5 Landis & Gyr RWB2 34 N L Glowworm Mastermind Landis & Gyr RWB20 34 N L Micr[...]

  • Page 24

    24 B023 6.2 Wiring Diagram f or Connection to Ariston Un vented Cylinder V4043H VA LV E BRO WN 8 BLUE 2 GREY 9 ORANGE 10 GREEN/YELLO W 3 Honeywell ST 699B 1002 63 N L Link L-5-8 ST 6400/ST 6300 ST 6200 3 4 N L Drayton T empus 7 3 4 N L Horstmann 425, 525, 527 14 E N L Link L-2-5 Landis & Gyr RWB2 34 N L Glowworm Mastermind Landis & Gyr RWB2[...]

  • Page 25

    NO TES 25 B023[...]

  • Page 26

    26 B023 NO TES[...]

  • Page 27

    27 B023[...]

  • Page 28

    Manuf acturer : Merloni T ermoSanitari SpA - Italy Commercial subsidiar y: MTS (GB) LIMITED MTS Building Hughenden A ven ue, High Wycombe Bucks HP13 5FT T elephone: (01494) 755600 - F ax: (01494) 459775 T echnical Service Hotline: (01494) 539579 Cod. 23 99 84 1260 112 - B023 ST AMP A: Azienda Grafica BIEFFE srl - Recanati[...]