Page 2 - TABLE OF CONTENTS; - Gas Adjustment Table
2 B004 TABLE OF CONTENTS 1. GENERAL INFORMATION 1.1 General Instructions1.2 Technical Information1.3 Overall View 2. INSTALLATION 2.1 Reference Standards2.2 Siting the Appliance2.3 Overall Dimensions2.4 Clearances2.5 Mounting the Appliance2.6 Electrical Connection2.7 Gas Connection2.8 Water Connecti...
Page 3 - Check the following at least once a year:; General Information
3 B004 This manual is an integral and essential part of the product. It should be keptwith the appliance so that it can be consulted by the user and our authorisedpersonnel. Please carefully read the instructions and notices about the unit contained int h i s m a n u a l , a s t h ey p r o v i d e i...
Page 4 - Technical Information; 0 - Check the proper operation of the gas safety system:; the instructions shown in the Installation Instructions.
4 B004 23 MFFI 27 MFFI 27 RFFI SYSTEM 30 MFFI CE CertificationHeat Input max/min kW 25.6/11.0 29.8/12.0 29.8/12.0 33.0/12.0 Heat Output max/min kW 23.1/9.2 27.3/10.1 27.3/10.1 30.3/10.2 Efficiency of Nominal Heat Input % 90.2 91.6 91.6 92.0 Efficiency at 30% of Nominal Heat Input % 87.8 88.3 88.3 88...
Page 5 - GENUS 27 RFFI SYSTEM; Overall View
5 B004 GENUS 23/27/30 MFFI Legend: 1. Flue Connector 2. Combustion Chamber Hood 3. Main Heat Exchanger 4. Combustion Chamber Insulation Panel 5. Burner 6. Expansion Vessel 7. Overheat Thermostat 8. Spark Generator 9. Diverter Valve (MFFI) Motorised Valve (RFFI) 10. Main Circuit Temperature Probe11. ...
Page 6 - INSTALLATION; Reference Standards; Flues
6 B004 The technical information and instructions provided herein below are intendedfor the installer so that the unit may be installed correctly and safely. The installation and initial startup of the boiler must be by a CORGI ApprovedInstaller in compliance with the installation standards currentl...
Page 7 - Overall Dimensions; Clearances
7 B004 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”)F = Cylinder Flow (3/4”)G = Cylinder Return (3/4”) 2.3 Overall Dimensions 890 385 (A-B-D-E) (C) 465 99 99 132 67 65 85 155 208 30...
Page 9 - Water Connections; Legend; This boiler is suitable only for sealed systems.; View of the Boiler Connections
9 B004 2.8 Water Connections Legend A = Central Heating FlowB = Domestic Hot Water OutletC = Gas InletD = Domestic Cold Water InletE = Central Heating ReturnF = Cylinder FlowG = Cylinder ReturnI = Safety Valve Central HeatingDetailed recommendations are given in BS 6798:1987 and BS 5449-1:1990,the f...
Page 10 - Residual Head of the Boiler; Flue Connections
10 B004 Residual Head of the Boiler 27/30 kW 23 kW 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 ...
Page 11 - TERMINAL POSITION
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 F - From internal or external corners 300 G - Above ground or belo...
Page 15 - Remove the grommet “E” shown in the photo 4, make a hole in it and pass; the room thermostat wire through.; Only a two-wire type room thermostat can be used.; Room Thermostat; clips “B” and lift and rotate down the control panel box.
15 B004 4 Remove the grommet “E” shown in the photo 4, make a hole in it and pass the room thermostat wire through. 5 Remove the link located in the terminal block and connect the wire.6 Replace the grommet and the terminal block to their original positions, close the cover on the grommet compartmen...
Page 16 - Electrical Diagram; Colours
16 B004 2.11 Electrical Diagram Legend: AT = High Voltage P.C.B. BT = Low Voltage P.C.B. A = Remote Connector Kit 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 f...
Page 17 - GENUS 27 RFFI SYSTEM
17 B004 Aa GENUS 23/27/30 MFFI Aa GENUS 27 RFFI SYSTEM
Page 18 - GENUS 27 RFFI SYSTEM
18 B004 CN202 P GENUS 23/27/30 MFFI P GENUS 27 RFFI SYSTEM
Page 19 - Water Circuit Diagram
19 B004 GENUS 23/27/30 MFFI 2.12 Water Circuit Diagram Legend 1. Air Pressure Switch 2. Fan 3. Main Heat Exchanger 4. Burner 5. Electronic Ignitor and Electronic Flame Detector 6. Gas Valve 7. Overheat Thermostat 8. Heating Sensor 9. Diverter Valve (MFFI) Motorised Valve (RFFI) 10. Main Flow Switch ...
Page 20 - COMMISSIONING; Initial Preparation; Filling the Heating System:; Removing the Casing
20 B004 3. COMMISSIONING 3.1 Initial Preparation Preliminary electrical system checks to ensure electrical safety must be carriedout by a competent person i.e. polarity, earth continuity, resistance to earth andshort circuit. Filling the Heating System: Remove the panels of the case and lower the co...
Page 21 - Control Panel
21 B004 3 2. Lift the front panel up until it stops after the click; 3. Remove the front panel from the rest of boiler casing;4. Unhook the two cords from the location slots. 4 3.3 Control Panel A - Ignition Lockout Reset Button/Safety (Overheat)Thermostat Reset B - Ignition Lockout L.E.D. C - Selec...
Page 23 - Combustion Analysis; and CO
23 B004 3.6 Combustion Analysis The boiler is designed to make it easy to analyse the combustion by-products. Using the especially designed aper tures, readings can be taken on thetemperature of the combustion by-products and of the combustion air, as wellas of the concentrations of O 2 and CO 2 , e...
Page 24 - Draining the System; Draining the heating system.; the water that comes out; Draining the domestic hot water system.
24 B004 3.9 Draining the System Draining the heating system. The heating system must be emptied as follows:- Turn off the boiler;-Open the drain valve for the system and place a container below to catch the water that comes out; - Empty the system at the lowest points (where present). If you plan on...
Page 25 - GAS ADJUSTMENTS
CATEGORY II2H3+ Methane Gas Liquid Butane Gas Liquid Propane Gas G20 G30 G31 Recommended Soft-light Pressure(mbar) 5-5.5 17 - 18 18 - 19 Lower Wobbe Index (15°C;1013mbar) MJ/m3h 45.67 80.58 70.69 Nominal Delivery Pressure mbar 20 30 37 Minimum Delivery Pressure mbar 17 20 25 23 MFFI Main Burner: n. ...
Page 26 - and cleaning of the burners if needed.; MAINTENANCE
26 B004 It is recommended that the following checks be made on the boiler atleast once a year:1 - Check the seals for the water connections; replacement of any faulty seals.2 - Check the gas seals; replacement of any faulty gas seals.3 - Visual check of the entire unit.4 - Visual check of the combus...
Page 27 - MISCELLANEOUS; PR; BOILER
27 B004 6. MISCELLANEOUS 6.1 Wiring Diagram for Two Heating Zones V4043H VALVE BROWN 8 BLUE 2 GREY 9 ORANGE 10 GREEN/YELLOW 3 Hone yw ell ST 699B 1002 63 N L Link L-5-8 ST 6400/ST 6300 ST 6200 3 4 N L Dr ayton T empus 7 3 4 N L Horstmann 425, 525, 527 14 E N L Link L-2-5 Landis & Gyr R WB2 34 N ...
Page 29 - NOTES
Page 32 - Merloni TermoSanitari SpA - Italy
B004 - Cod. 23 99 84 1259 111 - Stampa: bb iiee ffff ee RECANATI Manufacturer: Merloni TermoSanitari SpA - Italy Commercial subsidiary: MTS (GB) LIMITED MTS BuildingHughenden Avenue,High WycombeBucks HP13 5FTTelephone: (01494) 755600 -Fax: (01494) 459775Technical Service Hotline: (01494) 539579
