Summary of the content on the page No. 1
A/23 MFFI - A/27 MFFI
G.C.N. 47-116-10 / 47-116-12
Installation Instructions
Type C Boilers
LEAVE THESE INSTRUCTIONS
ADJACENT TO THE GAS METER
Country of destination: GB
Summary of the content on the page No. 2
1. GENERAL INFORMATION TABLE OF CONTENTS 1.1 General Instructions 1.2 Technical Information 1.3 Overall View 2. INSTALLATION 2.1 Reference Standards 2.2 Siting the Appliance 2.3 Overall Dimensions 2.4 Clearances 2.5 Mounting the Appliance 2.6 Electrical Connection 2.7 Gas Connection 2.8 Water Connections 2.9 Flue Connection 2.10 Room Thermostat Connection 2.11 Electrical/System Diagrams 2.12 Water Circuit Diagrams 3. COMMISSIONING 3.1 Initial Preparation 3.2 Removing the Front Panel 3.3 Control
Summary of the content on the page No. 3
This manual is an integral and essential part of the product. It should be kept 1. GENERAL with the appliance so that it can be consulted by the user and our authorised INFORMATION personnel. Please carefully read the instructions and notices about the unit contained in this manual, as they provide important information regarding the safe installation, use and maintenance of the product. For operating instructions please consult the separate User’s Manual. User’s Manual A/23 MFFI A/27 MFFI Read
Summary of the content on the page No. 4
chamber visually. 4 - Visual check of the combustion: clean burners if necessary. 5 - With reference to point 3, dismantle and clean the combustion chamber if necessary. 6 - With reference to point 4, dismantle and clean the injectors if necessary. 7 - Visual check of the primary heat exchanger: - check for overheating of the exchangers fins; - clean the exhaust side of the exchanger and fan if necessary. 8 - Regulate the gas pressure, ignition pressure, partial flame, maximum flame. 9 - Check
Summary of the content on the page No. 5
1.3 Overall View A/23 MFFI - A/27 MFFI Fig. 1.1 Legend: 1. Flue Connector 14. Drain Valve 2. Combustion Chamber Hood 15. Secondary Heat Exchanger 3. Main Heat Exchanger 16. Safety Valve (3 bar) 4. Combustion Chamber Insulation Panel 17. Circulation Pump with Automatic Air Release Valve 5. Burner 18. Gas Valve 6. Expansion Vessel 19. Detection Electrodes 7. Overheat Thermostat 20. Ignition Electrodes 8. Spark Generator 21. Fan 9. Diverter Valve 22. Venturi 10. Main Circuit Temperature Probe 23.
Summary of the content on the page No. 6
The technical information and instructions provided herein below are intended 2. INSTALLATION for the installer so that the unit may be installed correctly and safely. The installation and initial start up of the boiler must be by a CORGI Approved 2.1 Reference Standards Installer in compliance with the installation standards currently in effect, as well as with any and all local health and safety standards i.e. CORGI . This appliance must be installed by a competent installer in accordance with
Summary of the content on the page No. 7
465 2.3 Overall Dimensions (A-B-D-E) (C) Fig. 2.1 Legend: 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”) In order to allow for access to the interior of the boiler for maintenance purposes, the 2.4Clearances boiler must be installed in compliance with the minimum clearances indicated in the diagram below. A/23 MFFI - A/27 MFFI 60 60 450 40 50 60 70 80 C C 300 Fig. 2.2 B023 7 365
Summary of the content on the page No. 8
Fasten the boiler in place using the template and anchors supplied with the 2.5 Mounting the Appliance unit. It is highly recommended that a spirit level be used to position the boiler so that it is perfectly level. For additional information, please consult the instructions contained in the connection kit and the flue kit. For safety purposes, have a competent person carefully check the electrical 2.6 Electrical Connection system in the property, as the manufacturer will not be held liable for
Summary of the content on the page No. 9
2.9 Water Connections A/23 MFFI - A/27 MFFI C A B D E I Fig. 2.4 Legend A = Central Heating Flow B = Domestic Hot Water Outlet C = Gas Inlet D = Domestic Cold Water Inlet E = Central Heating Return I = Safety Valve Central Heating Detailed recommendations are given in BS 6798:1987 and BS 5449-1:1990, the following notes are given for general guidance. Pipe Work: Copper tubing to BS EN 1057:1996 is recommended for water pipes. Jointing should be either with capillary soldered or compression fitti
Summary of the content on the page No. 10
public access. Air Release Points: These must be fitted at all high points where air naturally collects and must be sited to facilitate complete filling of the system. The appliance has an integral sealed expansion vessel to accommodate the increase of water value when the system is heated. It can accept up to 7 l (1.5 gal) of expansion water. If the heating circuit has an unusually high water content, calculate the total expansion and add an additional sealed expansion vessel with adequate
Summary of the content on the page No. 11
TERMINAL POSITION mm A - Directly below an open window or other opening 300 B - Below gutters, solid pipes or drain pipes 75 C - Below eaves 200 D - Below balconies or car-port roof 200 E - From vertical drain pipes and soil pipes 75 BC F F - From internal or external corners 300 F G D J G - Above ground or below balcony level 300 HI A E H - From a surface facing a terminal 600 I - From a terminal facing a terminal 1200 J - From an opening in the car port K L ( e.g. door, window ) into dwelling
Summary of the content on the page No. 12
This procedure must be done as follows: 1 - Remove the air vent intake you want to use, in the area indicated in Fig. 2.8, by breaking the perforated ring. 2 - Use a tool to grasp the lid and remove it completely. 3 - Clean any burrs or sharp edges with a knife or an appropriate tool. A Fig. 2.8 Fig. 2.9 In Fig. 2.10 below, several different types of flue systems are shown. For additional information regarding the flue accessories, please consult the Flue Pipe Accessories manual. Fig. 2.10 B023
Summary of the content on the page No. 13
Maximum Extension Diameter of Pipes Use of a Restrictor Exhaust Type Risk of Condensation Forming Exhaust/Air (mm) on the Discharge Side C12 (xx) 4 m ø 60 /100 L* < 0.5 m Coaxial System C32 (xx) 4 m ø 60 /100 L* < 0.5 m C42 (xx) 4 m ø 60 /100 L* < 0.5 m 23 kW 27 kW C12 (xy) 54 m 46 m ø 80 L < 7 m (23 kW) L < 5 m (27 kW) L > 4 9 m (23 kW) L > 6.5 m (27 kW) C32 (xy) 54 m 46 m ø 80 L < 7 m (23 kW) L < 5 m (27 kW) L > 4.9 m (23 kW) L > 6.5m (27 kW) Twin Pipe Systems C42 (xy)
Summary of the content on the page No. 14
In order to perform this procedure, remove boiler cover as indicated in section 2.10 Room Thermostat 3.2. Then proceed as follows: Connection 1 Remove the screws “A” located on the bottom part of the boiler; 2 Widen the sides so that the control panel can be rotated. 3 Open the cover “B” on the left hand side of the compartment. 4 Insert the wire for the connection of the room thermostat into the wire holder “C”, as indicated in photo 3. 1 2 A 3 4 C B 5 Remove the grommet “D” shown in photo 5,
Summary of the content on the page No. 15
Legend: 2.11 Electrical Diagram AT = High Voltage P.C.B. BT = Low Voltage P.C.B. B = Flame Failure L.E.D. C = Insufficient Water Pressure L.E.D. D = Water Temperature Indicator L.E.D.s E = Overheat Thermostat Warning L.E.D. F = System Reset Button G = Selector Knob for Operating Mode H = Domestic Hot Water Temp. Adjustment I = Central Heating Temp. Adjustment J = Wire Connector for Room Thermostat K = Connector for Total Check System M = Anti-cycling Device Adjustment for Heating N = Soft-light
Summary of the content on the page No. 16
8 EX C-MI/FFI A/23 MFFI - A/27 MFFI A/23 MFFI - A/27 MFFI B023 16
Summary of the content on the page No. 17
2.12 Water Circuit Diagram Legend A/23 MFFI - A/27 MFFI 1. Air Pressure Switch 2. Fan 3. Main Heat Exchanger 4. Main Burner 5. Ignition Electrodes Detection Electrode 6. Gas Valve 7. Overheat Thermostat 8. Main Circuit Temperature Probe 9. Diverter Valve 10. Main Circuit Flow Switch including Safety Pressure Switch for Primary Circuit 11. Automatic By-pass 12. Microswitch for Diverter Valve 13. Secondary Heat Exchanger 14. Domestic Water Inlet Filter 15. Boiler Drain Valve 16. Safety Valve
Summary of the content on the page No. 18
system (sect. 3.4) and run it until the temperature has reached the boiler operating temperature. The system must then be immediately flushed through. The flushing procedure must be in line with BS 7593:1992 Code of practice for treatment of water in domestic hot water central heating systems. During this operation, we highly recommend the use of a central heating flushing detergent (Fernox Superfloc or equivalent), whose function is to dissolve any foreign matter that may be in the system. Subs
Summary of the content on the page No. 19
The checks to be run before initial start-up are as follows: 3.4 Initial Start-up 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 appro- priate level; -Check to see whether the gas cock is closed; -Make sure that the electrical connection has been made properly and that the earth wire is connected to an efficient earthing system; - Supply power to the boiler by pressing th
Summary of the content on the page No. 20
G20 5.5 mm c.a. G25 4.5 mm c.a. G30-31 1.8 mm c.a. - the potentiometer for the maximum thermal power for the heating system, maximum thermal power setting (factory set at the maximum value, unless indicated otherwise on the adhesive sticker located in proximity to the potentiometer); - The connection for the diagnostic device (TCS-TCS2). The boiler is designed to make it easy to analyse the combustion by-products. 3.6 Combustion Analysis Using the especially designed apertures, readings can be t
