Compact. Installation & Servicing Instructions THESE INSTRUCTIONS TO BE RETAINED BY USER

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1 Compact Installation & Servicing Instructions THESE INSTRUCTIONS TO BE RETAINED BY USER

2 Contents Design principles and operating sequence Page 1.1 Principle components Central heating mode Hot water mode Safety devices Frost protection 2 Technical data Page 2.1 Central heating Domestic hot water Gas pressure Expansion vessel Dimensions Clearances Connections Electrical Flue details Efficiency Pump duty 4 General requirements (UK) Page 3.1 Related documents Location of appliance Gas supply Flue system Air supply Water circulation Pipework Automatic by-pass Drain cocks Air release points Expansion vessel Filling point Low pressure sealed system Frequent filling Electrical supply Showers Mounting on a combustible surface Timber framed building Inhibitors 7 General requirements (EIRE) Page 3.A1 Related documents 7 3.A2 Location of appliance 7 3.A3 Gas supply 7 3.A4 Flue system 7 3.A5 Air supply 8 3.A6 Water circulation 8 3.A6.1 Pipework 8 3.A6.2 Automatic by-pass 8 3.A6.3 Drain cocks 8 3.A6.4 Air release points 8 3.A6.5 Expansion vessel 8 3.A6.6 Filling point 8 3.A6.7 Low pressure sealed system 8 3.A6.8 Frequent filling 8 3.A7 Electrical supply 8 3.A8 Showers 8 3.A9 Mounting on a combustible surface 8 3.A10 Timber framed building 8 3.A11 Inhibitors 8 3.A12 Declaration of conformity 8 Installation Page 4.1 Delivery Contents Unpacking Preparation for mounting the appliance Important Flue restrictor ring Fitting the flue Concentric horizontal flue Concentric vertical flue Twin flue system Connecting the gas and water Gas Flow and return Safety valve Cold water inlet Hot water outlet Electrical connections Casing removal Electrical connection Connecting the mains (230V) input 15 Commissioning Page 5.1 Gas supply installation The heating system Initial filling of the system Initial flushing Filling the hot water system Pre-operation checks Initial lighting Checking burner pressures Final flushing of the heating system Inhibtors Setting the flow temperature Setting the system design pressure Regulating the central heating system Regulating the domestic hot water Final checks Instructing the user 17 Servicing instructions Page 6.1 General Routine annual servicing Replacement of components De-scaling main heat exchanger Component removal procedure Pump head Safety valve Automatic air release valve Water pressure switch Domestic water flow switch Pressure gauge Primary and secondary thermistors High limit thermostat PCB Integral time switch Gas valve Burner, injectors and spark/sense electrode Flue fan Heat exchanger Air pressure switch Expansion vessel Expansion vessel (removal) 21 Checks, adjustments and fault finding page 7.1 Checking appliance operation At rest mode Hot water mode Heating mode Frost protection mode Burner pressure settings Setting the maximum DHW gas pressure Setting the minimum DHW gas pressure Setting the max & min CH burner pressures Combustion analysis test Checking the expansion vessel Electro-mechanical faults Possible installation faults Electrical checks Earth continuity test Short circuit test Polarity check Reversed polarity or supply fault Resistance to earth check Fuses Fault finding Wiring diagrams Page 8.1 Connection of a room thermostat Connection of an external time clock 32 Functional flow diagram Exploded diagrams Page Table 1 35 Table 2 36 Table 3 37 Table 4 38 Table 5 39 L.P.G. instructions Page 10.1 Technical data Related documents Gas supply Gas supply installation Burner pressures Setting the maximum DHW gas pressure Setting the minimum DHW gas pressure Setting the max & min CH burner pressures 40 REAR FLUE Page 11.1 Fitting the flue 41

3 INTRODUCTION The Vokera Compact range of appliances are combined central heating and domestic hot water boilers, which by design incorporates full sequence electronic ignition, circulating pump, expansion vessel, safety valve, pressure gauge, automatic by-pass, and mechanical time clock. Compact is produced as a room sealed appliance, suitable for wall mounting applications only. Compact is provided with a fan powered flue outlet with an annular co-axial combustion air intake that can be rotated horizontally through 360 degrees for various horizontal or vertical applications, and can also be converted for use with a rear flue outlet. Compact can also be used with the Vokera twin flue system. This appliance is designed primarily for use with sealed systems; consequently it is not intended for use on an open vented system. 1 2 Fig.1 General Layout Flue Analysis Test Point 2 Pressure Tube Negative 3 Fan Assembly 4 Heat Exchanger 5 Secondary thermistor 6 Combustion chamber 7 Burner 8 Expansion vessel 9 Water pressure switch 10 Domestic Hot Water Flow Switch 11 Gas Valve 12 Timeclock 13 CH position 14 Fault indicator led 15 Mode selector switch 16 DHW position 17 Pressure gauge 18 Safety valve 19 Pump 20 Auto air vent 21 Electrode 22 High limit thermistor 23 Primary thermistor 24 Air chamber (with cover removed) 25 Air pressure switch 26 Auto by pass (fig. 2) 27 Water flow restrictor (fig. 2) Fig. 1 Compact 1

4 SECTION 1 DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS A fully integrated, electronic control board featuring mode selection switch, full sequenceelectronic ignition, temperature control system, and appliance status indicator. A BI-thermal gas to water heat exchanger. A multi-functional gas valve. Two-stage, primary water pressure switch. Integral pump, expansion vessel, pressure relief valve, pressure gauge, domestic water flow switch, fan, differential air pressure switch, and time clock. MODES OF OPERATION 1.2 CENTRAL HEATING MODE When there is a request for central heating via the time-clock and/or any external controls, the pump and fan are started, the fan proves the differential air pressure switch which in-turn, allows an ignition sequence to begin. Ignition is sensed by the electronic circuitry to ensure flame stability at the burner. Once successful ignition has been achieved the appliance operates al 75% of maximum for a fifteen-minute period, and thereafter the appliance operates on maximum output until the desired temperature setting is reached Once the desired temperature is reached, the burner will modulate to maintain that temperature, however should the temperature within the appliance continue to rise, the burner will shut down and the boiler will perform a three-minute anti-cycle (timer delay). 1.3 HOT WATER MODE When there is a demand for domestic hot water the domestic hot water flow switch is proved by the flow of water through the appliance, this allows the fan to run, the fan proves the differential air pressure switch which in-turn, allows an ignition sequence to begin. Ignition is sensed by the electronic circuitry to ensure flame stability at the burner. Once successful ignition has been achieved the appliance will modulate burner gas pressure to maintain the desired water temperature, should the temperature of the domestic hot water exceed the temperature setting by 5 ºC the burner will shut down until the water temperature drops below the required setting. 1.4 SAFETY DEVICES In both central heating and domestic hot water modes, safe operation is ensured by. A water pressure switch that monitors the system pressure and will deactivate the pump and prevent burner ignition should the pressure or primary flow rate fall below the rated tolerance. Differential air pressure switch that checks the correct operation of the fan and flue thereby preventing or interrupting burner operation. A high limit thermostat that overrides the control circuit to prevent or interrupt burner ignition. A safety valve which releases excess pressure from the primary circuit FROST PROTECTION The appliance has built-in frost protection that allows the pump to operate if the appliance temperature drops to 7 ºC, should the temperature continue to drop the burner will light until the primary circuit temperature exceeds 30 ºC. return flow hw outlet cold inlet Fig. 2 2 Compact

5 SECTION 2 TECHNICAL DATA Ref. Condition 15 C, 1013,25 mbar, dry gas TE: L.P.G. data refer to section 10 Compact 24 Compact Central heating Heat input (kw) Heat output (maximum) kw Heat output (minimum) kw Minimum working pressure 0,5 bar 0,5 bar Maximum working pressure 3.0 bar 3.0 bar Minimum flow rate 350 l/h 350 l/h 2.2 Domestic hot water Heat input (kw) Heat output (maximum) kw Heat output (minimum) kw Flow rate (35 C rise) 9.8 l/min 11.5 l/min Maximum inlet pressure 6.0 bar 6.0 bar Minimum inlet working pressure 0.15 bar 0.15 bar Minimum flow rate 2 l/min. 2 l/min. 2.3 Gas pressures Inlet pressure G mbar 20.0 mbar Maximum burner pressure 10.1 mbar 10.2 mbar Minimum burner pressure (central heating) 1.9 mbar 1.9 mbar Minimum burner pressure (domestic hot water) 1.5 mbar 1.3 mbar Gross rate (maximum) 2.78 m 3 /h 3.28 m 3 /h Injectors size 12 x 1.35 mm 14 x 1.35 mm 2.4 Expansion vessel Capacity 8 litres 8 litres Maximum system volume 76 litres 76 litres Pre-charge pressure 1.0 bar 1.0 bar 2.5 Dimensions Height 740 mm 740 mm Width 400 mm 450 mm Depth 328 mm 328 mm Dry weight 32 kg 34 kg 2.6 Clearances Left side 50 mm 50 mm Right side 12 mm 12 mm Top 150 mm from casing or 25 mm above flue elbow, whichever is applicable Bottom 150 mm 150 mm Front 600 mm 600 mm 2.7 Connections Flow & return 22 mm 22 mm Hot & cold water connections 15 mm 15 mm Gas 15 mm 15 mm Safety valve 15 mm 15 mm 2.8 Electrical Voltage 230V/~ 50hz 230V/~ 50hz Power consumption 125 W 125 W Internal fuse 2 A 2 A PCB fuse 2 AF 2 AF External fuse 3 A 3 A 2.9 Flue details Maximum horizontal flue length (concentric) 4.25 m 3.4 m Maximum vertical flue length (concentric) 5 m 4.2 m Maximum twin flue length (horizontal or vertical) 14 m + 14 m 14 m + 14 m Maximum rear flue length (see section 11) 1.0 m 1.0 m 2.10 Efficiency SEDBUK Band D Band D Compact 3

6 2.11 PUMP DUTY Fig. 3 shows the flow rate available after allowing for pressure loss through the appliance against system pressure loss. When using this graph apply only the pressure loss of the system. The graph is based on a 20 ºC temperature differential. Water pressure (mbar) Fig Litres Per Hour (x100) SECTION 3 GENERAL REQUIREMENTS (UK) Key Location Minimum distance A Below an opening (window, air-brik, etc.) 300 mm B Above an opening (window, air-brik, etc.) 300 mm C To the side of an opening (window, air-brik, etc.) 300 mm D Below gutter, drain-pipe, etc. 75 mm E Below eaves 200 mm F Below balcony, car-port roof, etc. 200 mm G To the side of a soil/drain-pipe, etc. 150 mm H From internal/external corner or boundary 300 mm I Above ground, roof, or balcony level 300 mm J From a surface or boundary facing the terminal 600 mm K From a terminal facing a terminal 1200 mm L From an opening in the car-port into the building 1200 mm M Vertically from a terminal on the same wall 1500 mm N Horizontally from a terminal on the same wall 300 mm P From a structure to the side of the vertical terminal 300 mm Q From the top of the vertical terminal to the roof flashing As determined by the fixed collar of the vertical terminal Fig. 4 4 Compact

7 This appliance must be installed by a competent person in accordance with the Gas Safety (Installation & Use) Regulations. 3.1 RELATED DOCUMENTS The installation of this boiler must be in accordance with the relevant requirements of the Gas Safety (Installation & Use) Regulations, the local building regulations, the current I.E.E. wiring regulations, the bylaws of the local water undertaking, the Building Standards (Scotland) Regulation, and Building Standards (Northern Ireland) Regulations. It should be in accordance also with any relevant requirements of the local authority and the relevant recommendations of the following British Standard Codes of Practice. 3.2 LOCATION OF APPLIANCE The appliance may be installed in any room or internal space, although particular attention is drawn to the requirements of the current I.E.E. wiring regulations, and in Scotland, the electrical provisions of the Building Regulations, with respect to the installation of the appliance in a room or internal space containing a bath or shower. 3.3 GAS SUPPLY The gas meter as supplied by the gas supplier must be checked to ensure that it is of adequate size to deal with the maximum rated input of all the appliances that it serves. Installation pipes must be fitted in accordance with BS Pipe work from the meter to the appliance must be of adequate size. Pipes of a smaller size than the appliance gas inlet connection must not be used. The installation must be tested for soundness in accordance with BS6891. If the gas supply serves more than one appliance, it must be ensured that an adequate supply is maintained to each appliance when they are in use at the same time. 3.4 FLUE SYSTEM The terminal should be located where the dispersal of combustion products is not impeded and with due regard for the damage and discoloration that may occur to building products located nearby. The terminal must not be located in a place where it is likely to cause a nuisance (fig. 4). In cold and/or humid weather, water vapour may condense on leaving the terminal; the effect of such pluming must be considered. BS 5440 PART 1 FLUES BS 5440 PART 2 FLUES AND VENTILATION BS 5449 PART 1 FORCED CIRCULATION HOT WATER SYSTEMS BS5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES (2 ND FAMILY GASES) BS 6798 BOILERS OF RATED INPUT T EXCEEDING 60kW BS 6891 LOW PRESSURE INSTALLATION PIPES BS 7074 PART 1 APPLICATION, SELECTION, AND INSTALLATION OF EXPANSION VESSELS AND ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS When an appliance is installed in a room or internal space containing a bath or shower, the appliance or any control pertaining to it must not be within reach of a person using the bath or shower. The location chosen for the appliance must permit the provision of a safe and satisfactory flue and termination. The location must also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance. Where the installation of the appliance will be in an unusual location special procedures may be necessary, BS 6798 gives detailed guidance on this aspect. A compartment used to enclose the appliance must be designed and constructed specifically for this purpose. An existing compartment/ cupboard may be utilised provided that it is modified to suit. Details of essential features of compartment/ cupboard design including airing cupboard installations are given in BS This appliance is not suitable for external installation. If installed less than 2 m above a pavement or platform to which people have access (including balconies or flat roofs) the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to BS 5440 Part 1, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves. 3.5 AIR SUPPLY The following notes are intended for general guidance only. This appliance is a room-sealed, fan-flued boiler, consequently it does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required. 3.6 WATER CIRCULATION Detailed recommendations are given in BS 5449 Part 1 and BS The following notes are for general guidance only. Compact 5

8 3.6.1 PIPEWORK It is recommended that copper tubing to BS 2871 Part 1 is used in conjunction with soldered capillary joints. Where possible pipes should have a gradient to ensure air is carried naturally to air release points and that water flows naturally to drain cocks. Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated areas such as under floors, loft space, and void areas AUTOMATIC BY-PASS The appliance has a built-in automatic by-pass, consequently there is no requirement for an external by-pass, however the design of the system should be such that it prevents boiler cycling DRAIN COCKS These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance. The drain cocks must be manufactured in accordance with BS AIR RELEASE POINTS These must be positioned at the highest points in the system where air is likely to be trapped. They should be used to expel trapped air and allow complete filling of the system EXPANSION VESSEL The appliance has an integral expansion vessel to accommodate the increased volume of water when the system is heated. It can accept up to 8 litres of expansion from within the system, generally this is sufficient, however if the system has an unusually high water content, it may be necessary to provide additional expansion capacity (see section 6.19) FILLING POINT A method for initial filling of the system and replacing water lost during servicing etc. must be provided. This method of filling must comply with the current Water Supply (Water Fittings) Regulations 1999 and Water Bylaws 2000 (Scotland). Fig. 5 shows an accepted method. Fig. 5 flow/return pipe control valve temporary connection double check valve control valve supply pipe LOW PRESSURE SEALED SYSTEM An alternative method of filling the system would be from an independent make-up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres above the boiler (fig. 5a). The cold feed from the make-up vessel or tank must be fitted with an approved non-return valve and stopcock for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible. Automatic air-vent Fig. 5a Non-return valve Heating return Make-up vessel or tank Stopcock FREQUENT FILLING Frequent filling or venting of the system may be indicative of a leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar. 3.7 ELECTRICAL SUPPLY The appliance is supplied for operation on 50Hz electrical supply; it must be protected with a 3-amp fuse. The method of connection to the mains electricity supply must allow for complete isolation from the supply. The preferred method is by using a double-pole switch with a contact separation of at least 3 mm. The switch must only supply the appliance and its corresponding controls, i.e. time clock, room thermostat, etc. Alternatively an un-switched shuttered socket with a fused 3-pin plug both complying with BS 1363 is acceptable. 3.8 SHOWERS If the appliance is intended for use with a shower, the shower must be thermostatically controlled and be suitable for use with a combination boiler. 5.0 metres minimum 6 Compact

9 3.9 MOUNTING ON A COMBUSTIBLE SURFACE If the appliance is to be fitted on a wall of combustible material, a sheet of fireproof material must protect the wall TIMBER FRAMED BUILDING If the appliance is to be fitted in a timber framed building, it should be fitted in accordance with the Institute of Gas Engineers publication (IGE/UP/ 7) Guide for Gas Installations in Timber Frame Buildings INHIBITORS Vokera recommend that a neutral inhibitor is used to protect the heating system from the effects of corrosion and/or electrolytic action. The inhibitor must be administered in strict accordance with the manufacturers* instructions. *Fernox and Sentinel manufacture products that have proved suitable for use with Vokera appliances. Vokera Ltd. cannot comment on the suitability of any other such product with our appliances. Fig SECTION 3A GENERAL REQUIREMENTS (EIRE) This appliance must be installed by a competent person in accordance with and defined by, the Standard Specification (Domestic Gas Installations) Declaration (I.S. 813). 3A.1 RELATED DOCUMENTS The installation of this boiler must be in accordance with the relevant requirements of the local building regulations, the current ETCI National Rules for Electrical Installations, and the bylaws of the local water undertaking. It should be in accordance also with any relevant requirements of the local and/or district authority. 3A.2 LOCATION OF APPLIANCE The appliance may be installed in any room or internal space, although particular attention is drawn to the requirements of the current ETCI National Rules for Electrical Installations, and I.S. 813, Annex K. When an appliance is installed in a room or internal space containing a bath or shower, the appliance or any control pertaining to it must not be within reach of a person using the bath or shower. The location chosen for the appliance must permit the provision of a safe and satisfactory flue and termination. The location must also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance. Where the installation of the appliance will be in an unusual location special procedures may be necessary, refer to I.S. 813 for detailed guidance on this aspect. A compartment used to enclose the appliance must be designed and constructed specifically for this purpose. An existing compartment/cupboard may be utilised provided that it is modified to suit. Compact This appliance is not suitable for external installation. 3A.3 GAS SUPPLY The gas meter as supplied by the gas supplier must be checked to ensure that it is of adequate size to deal with the maximum rated input of all the appliances that it serves. Installation pipes must be fitted in accordance with I.S Pipe work from the meter to the appliance must be of adequate size. Pipes of a smaller size than the appliance gas inlet connection must not be used. The installation must be tested for soundness in accordance with I.S If the gas supply serves more than one appliance, it must be ensured that an adequate supply is maintained to each appliance when they are in use at the same time. 3A.4 FLUE SYSTEM The terminal should be located where the dispersal of combustion products is not impeded and with due regard for the damage and discoloration that may occur to building products located nearby. The terminal must not be located in a place where it is likely to cause a nuisance (see I.S. 813). In cold and/or humid weather, water vapour may condense on leaving the terminal; the effect of such pluming must be considered. If installed less than 2 m above a pavement or platform to which people have access (including balconies or flat roofs) the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to I.S. 813, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves. 7

10 3A.5 AIR SUPPLY The following notes are intended for general guidance only. This appliance is a room-sealed, fan-flued boiler, consequently it does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required. 3A.6 WATER CIRCULATION Specific recommendations are given in I.S The following notes are for general guidance only. 3A.6.1 PIPEWORK It is recommended that copper tubing be used in conjunction with soldered capillary joints. Where possible pipes should have a gradient to ensure air is carried naturally to air release points and that water flows naturally to drain cocks. Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated areas such as under floors, loft space, and void areas. 3A.6.2 AUTOMATIC BY-PASS The appliance has a built-in automatic by-pass, consequently there is no requirement for an external by-pass, however the design of the system should be such that it prevents boiler cycling. 3A.6.3 DRAIN COCKS These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance. 3A.6.4 AIR RELEASE POINTS These must be positioned at the highest points in the system where air is likely to be trapped. They should be used to expel trapped air and allow complete filling of the system. 3A.6.5 EXPANSION VESSEL The appliance has an integral expansion vessel to accommodate the increased volume of water when the system is heated. It can accept up to 8 litres of expansion from within the system, generally this is sufficient, however if the system has an unusually high water content, it may be necessary to provide additional expansion capacity (see section 6.19). 3A.6.6 FILLING POINT A method for initial filling of the system and replacing water lost during servicing etc. has been provided. You should ensure this method of filling complies with the local water authority regulations. 3A.6.7 LOW PRESSURE SEALED SYSTEM An alternative method of filling the system would be from an independent make-up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres above the boiler (fig. 5). The cold feed from the make-up vessel or tank must be fitted with an approved non-return valve and stopcock for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible. 3A.6.8 FREQUENT FILLING Frequent filling or venting of the system may be indicative of a leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar. 3A.7 ELECTRICAL SUPPLY The appliance is supplied for operation on 50Hz electrical supply; it must be protected with a 3-amp fuse. The method of connection to the mains electricity supply must allow for complete isolation from the supply. The preferred method is by using a double-pole switch with a contact separation of at least 3 mm. The switch must only supply the appliance and its corresponding controls, i.e. time clock, room thermostat, etc. 3A.8 SHOWERS If the appliance is intended for use with a shower, the shower must be thermostatically controlled and be suitable for use with a combination boiler. 3A.9 MOUNTING ON A COMBUSTIBLE SURFACE If the appliance is to be fitted on a wall of combustible material, a sheet of fireproof material must protect the wall. 3A.10 TIMBER FRAMED BUILDINGS If the appliance is to be fitted in a timber framed building, it should be fitted in accordance with I.S. 813 and local Building Regulations. The Institute of Gas Engineers publication (IGE/ UP/7) Guide for Gas Installations in Timber Frame Buildings gives specific advice on this type of installation. 3A.11 INHIBITORS Vokera recommend that a neutral inhibitor is used to protect the heating system from the effects of corrosion and/or electrolytic action.the inhibitor must be administered in strict accordance with the manufacturers* instructions. *Fernox and Sentinel manufacture products that have proved suitable for use with Vokera appliances. Vokera Ltd. cannot comment on the suitability of any other such product with our appliances. 3A.12 DECLARATION OF CONFORMITY A Declaration of Conformity (as defined in I.S. 813) must be provided on completion of the installation. A copy of the declaration must be given to the responsible person and also to the gas supplier if required. 8 Compact

11 SECTION 4 INSTALLATION 4.1 DELIVERY The appliance is delivered in a heavy-duty cardboard carton. Lay the carton on the floor with the writing the correct way up. 4.2 CONTENTS Contained within the carton is: the boiler the wall mounting bracket an accessories pack containing service valves and sealing washers the instructions pack containing installation & servicing instructions, appliance logbook, user instructions, guarantee registration card, 3 amp fuse and flue restrictor ring. 4.3 UNPACKING At the top of the carton pull both sides open do not use a knife unfold the rest of the carton from around the appliance, carefully remove all protective packaging from the appliance, and lay the accessories etc. to one side. Protective gloves should be used to lift the appliance, the appliance back-frame should be used for lifting points. 4.4 PREPARATION FOR MOUNTING THE APPLIANCE The appliance should be mounted on a smooth, non-combustible, vertical surface, which must be capable of supporting the full weight of the appliance. Care should be exercised when determining the position of the appliance with respect to hidden obstructions such as pipes, cables, etc. When the position of the appliance has been decided using the template supplied carefully mark the position of the wall bracket (fig. 7) and flue-hole (if applicable) IMPORTANT There are three hole types set out on the appliance template: type 1 should be used in conjunction with the telescopic flue kits (part no & ) type 2 should be used in conjunction with standard horizontal flue kit (part no ) type 3 should be used in conjunction with the telescopic rear flue kits (part no & ) FLUE RESTRICTOR RING To ensure maximum efficiency of the appliance, it may be necessary to fit one of the supplied flue restrictor rings to the appliance flue outlet. 4.5 FITTING THE FLUE The top flue outlet permits both horizontal and vertical flue applications to be considered, alternatively, the Vokera twin flue system can be utilised if longer flue runs are required CONCENTRIC HORIZONTAL FLUE (For concentric vertical flue, see section 4.5.2). (For twin flue applications, see section 4.5.3). Compact 24 Total flue length Less than 0.85 metre Less than 2 metre Less than 3 metre Less than 4.25 metre Compact 28 Total flue length Less than 0.85 metre Less than 1.70 metre Less than 2.70 metre Less than 3.40 metre Restrictor required 42 mm diameter 44 mm diameter 46 mm diameter Not installed Restrictor required 45 mm diameter 47 mm diameter 49 mm diameter Not installed The appliance flue outlet elbow can be rotated through 360º on its vertical axis. In addition the flue may be extended from the outlet elbow in the horizontal plane (see section 4.4.2), however if the flue is to be extended or additional bends are to be fitted, the standard horizontal flue kit (part no ) must be used. A reduction must also be made to the maximum length (see table) when additional bends are used. Bend Reduction in maximum flue length for each bend 45º bend 0.5 metre 90º bend 0.85 metre Horizontal flue terminals and accessories Part No. Description Min-Max Length Standard telescopic flue 380 mm 600 mm (Dimension X ) Extended telescopic flue 600 mm 920 mm (Dimension X ) Horizontal flue kit For use with add. Bends 833 mm & extensions (dimension X ) mm extension 750 mm mm extension 1500 mm º bend (pair) N/A º bend N/A Wall bracket (5) N/A Using the template provided (see section 4.4.1), mark and drill a 125 mm hole for the passage of the flue pipe. The hole should have a 1º drop from the boiler to outside, to eliminate the possibility of rainwater entering the appliance via the flue. The fixing holes for the wall-mounting bracket should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount the appliance onto the bracket. Compact 9

12 type 1= centre of rear flue hole using only or flue type 2= centre of rear flue hole for use with type 3= for rear flue only Fig. 7 FITTING THE TELESCOPIC FLUE KIT ( & ) Total flue length Less than 1 metre Carefully measure the distance from the centre of the appliance flue outlet to the face of the outside wall (dimension X, fig. 8). Add 50 mm to dimension X to give the overall flue length (dimension Y ). Using the complete telescopic flue assembly adjust the length to suit dimension Y. Once the telescopic flue terminal has been adjusted to the correct length, secure the flue assembly with the screw supplied. Insert the flue restrictor ring (supplied in the instruction pack) into the appliance flue gas outlet. Slide the flue assembly into the previously drilled flue hole and locate the flue bend over the appliance flue outlet. Push the flue bend down over the appliance flue outlet and ensure the correct seal is made. Pull the flue assembly towards and over the flue bend using a twisting action ensuring the correct seal is made. Check that the terminal protrudes past the finished outside wall by the correct length (115 mm) Restrictor required Compact 24 Compact mm diameter 42 mm diameter 110 FITTING THE STANDARD ( ) HORIZONTAL FLUE KIT (see section 4.4.1) Carefully measure the distance from the centre of the appliance flue outlet to the face of the outside wall (dimension X, fig. 8A). Ensure the inner (60 mm) pipe is fully inserted into the outer (100 mm) pipe (when the inner pipe is fully inserted, it stands proud of the outer pipe by 7.5 mm). Add 32 mm to dimension X to give the overall flue length (dimension Y ). The standard horizontal flue kit (part no ) is suitable for a distance (dimension Y ) of up to 865 mm. TE Dimension Y is measured from the end of the terminal to the end of the outer (100 mm) pipe. The internal trim should be fitted to the flue pipe before connection of the 90º bend. Insert the flue restrictor ring (supplied with instruction pack) into the appliance flue gas outlet if the total flue length is less than 1.0 metre. If the horizontal flue kit ( ) requires to be cut to the correct size (dimension Y ), you must ensure that the inner (60 mm) pipe stands proud of the outer (100 mm) pipe by 7.5 mm (fig. 8B). Ensure any burrs are filed or removed and that any seals are located properly before assembly. Connect the inner (60 mm) pipe of the terminal assembly to the push-fit end of the 90º bend (supplied) using a twisting action. Insert the assembled flue into the previously drilled hole. Using the clips & screws supplied, connect the flue assembly to the boiler, ensuring that the terminal protrudes past the finished outside wall by the correct length (135 mm). You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The exterior trim can now be fitted. 7,5 Dimension Y 135 mm Max 833 mm 115 mm Dimension X Fig. 8A X + 50 mm = Y Fig. 8 TE You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted. EXTENDING THE HORIZONTAL FLUE If the horizontal flue requires extension/s or additional bend/s, the standard horizontal flue terminal ( ) must be used. Connect the bend supplied with the terminal kit to the top of the boiler using the clips, screws & gaskets supplied. The additional bends & extensions have an internal push-fit connection, care should be taken to ensure that the correct seal is made when assembling the flue system. Connect the required number of flue extensions or bends (up to the maximum equivalent flue length) to the flue terminal using the clips, screws & gaskets supplied (fig. 8A & 8B). 10 Compact

13 TE When cutting the horizontal flue terminal or an extension to the required length, you must ensure that the excess is cut from the plain end of the terminal or extension, and that the inner (60 mm) pipe is 7.5 mm longer than outer (100 mm) pipe (fig. 8A & 8B). Remove any burrs, and check that any seals are located properly. You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted. Boiler Fig. 8B CONCENTRIC VERTICAL FLUE The vertical flue terminal can be connected directly to the appliance flue outlet. Alternatively, an extension or bend can be connected to the appliance flue outlet if desired (see section 4.4.2), however if additional bends are fitted, a reduction must be made to the maximum flue length (see table below). Compact 24 Total flue length Less than 1.5 metre Less than 2.5 metre Less than 3.5 metre Less than 5 metre Push-fit connection 7,5 mm Extension Restrictor required 42 mm diameter 44 mm diameter 46 mm diameter Not installed Fit the appropriate flashing plate to the roof and insert the vertical flue terminal through the flashing plate from the outside, ensuring that the collar on the flue terminal fits over the flashing. The fixing holes for the wall-mounting bracket should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount the appliance onto the bracket. IMPORTANT The vertical flue terminal is 1.0 metre in length and cannot be cut; therefore it may be necessary to adjust the height of the appliance to suit or use a suitable extension. Insert the flue restrictor ring into the appliance flue outlet, in accordance with the table in section Connect the vertical flue assembly to the boiler flue spigot using the 60 mm & 100 mm clips, gaskets, & screws (supplied), ensuring the correct seal is made. The flue support bracket (supplied with the vertical flue kit) can now be fitted. If the vertical flue requires extension/s or additional bend/s, connect the required number of flue extensions or bends (up to the maximum equivalent flue length) between the boiler and vertical flue assembly (fig. 8B). TE When cutting an extension to the required length, you must ensure that the excess is cut from the plain end of the extension and that the inner (60 mm) pipe is 7.5 mm longer than outer (100 mm) pipe (fig. 8B). Remove any burrs, and check that any seals are located properly. You must ensure that the entire flue system is properly supported and connected. 300 mm min. 465 mm Compact 28 Total flue length Less than 1.5 metre Less than 2.4 metre Less than 3.4 metre Less than 4.2 metre Restrictor required 45 mm diameter 47 mm diameter 49 mm diameter Not installed Bend Reduction in maximum flue length for each bend 45º bend 0.5 metre 90º bend 0.85 metre Vertical flue terminal and accessories Part No. Description Length Vertical flue terminal 1.0 metre Pitched roof flashing plate N/A Flat roof flashing plate N/A mm extension 750 mm mm extension 1500 mm º bend (pair) N/A º bend N/A Wall bracket (5) N/A Using the dimensions given in fig. 9 as a reference, mark and cut a 105 mm hole in the ceiling and/or roof. Fig mm TWIN FLUE SYSTEM Compact 24 Total flue length (air = fumes) Less than Less than Less than Restrictor required 42 mm diameter 44 mm diameter 46 mm diameter Compact 11

14 Compact 28 Total flue length Less than Less than Less than Less than Restrictor required 45 mm diameter 47 mm diameter 49 mm diameter Not required Compact 24 restrictor ring The Vokera twin flue system enables greater flue distances to be achieved (see section 2.8) than that of the standard concentric flue system. It can be used for horizontal or vertical applications, however the twin flue system must be converted to the dedicated concentric flue kit for termination. It is essential that the installation of the twin flue system be carried out in strict accordance with these instructions. GUIDANCE TES ON TWIN FLUE INSTALLATION The flue must have a fall back of 1º back to the appliance to allow any condensate that forms in the flue system to drain. Consideration must also be given to the fact that there is the possibility of a small amount of condensate dripping from the terminal. Ensure that the entire flue system is adequately supported, use at least one bracket for each extension. Extreme care must be taken to ensure that no debris is allowed to enter the flue system at any time. As the exhaust outlet pipe can reach very high temperatures it must be protected to prevent persons touching the hot surface. Twin flue accessories Part No. Description Length Horizontal flue terminal 1.0 metre Vertical flue terminal 1.0 metre 300 Twin adapter kit for Compact 24 N/A Twin adapter kit for Compact 28 N/A Pitched roof flashing plate N/A Flat roof flashing plate N/A Condensate drain kit N/A m extension (pair) 250 mm m extension (pair) 500 mm m extension (pair) 1000 mm m extension (pair) 2000 mm º bend (pair) N/A º bend (pair) N/A Twin bracket (5) N/A Single bracket (5) N/A MOUNTING THE BOILER The fixing holes for the wall-mounting bracket should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount the appliance onto the bracket INSTALLATION OF TWIN ADAPTOR KIT (fig. 10 & 10A) Insert the exhaust connection manifold (B) onto the appliance flue outlet and secure to the flue spigot using the screws provided. Insert the silicone seal into the exhaust outlet. Remove the blanking plates (located to the left of the appliance flue outlet) and using the same screws install the air baffle (A). Fig. 10 Compact 28 Fig. 10A INSTALLATION OF CONDENSATE DRAIN KIT (fig. 10B) The condensate drain kit must be fitted within 1 metre of the appliance flue outlet. It is recommended that the condensate drain kit should be fitted in the vertical plane, however it can be fitted horizontally with care. Fit the first bend to the condensate drain kit or exhaust connection manifold by firmly pushing in to position. Using the two holes in the exhaust connection manifold as a guide, drill a 3 mm hole in each and secure using the screws provided. Connect the air inlet pipe to the air baffle as above. The twin flue pipes extensions and accessories can now be installed by pushing together (the plain end of each extension or bend should be pushed approximately 50 mm into the female socket of the previous piece). The condensate drain trap must be connected to the drain in accordance with building Regulations or other rules in force. Fig. 10B air inlet air inlet Condensate drain kit flue outlet restrictor ring flue outlet 12 Compact

15 HORIZONTAL TERMINATION (fig. 11) The twin flue system must be converted to the dedicated concentric flue kit for termination. The horizontal terminal is supplied with a builtin converter box and cannot be shortened. A 130 mm hole is required for the passage of the concentric terminal through the wall. Depending on site conditions it may be preferable to install the terminal assembly prior to fitting the twin flue pipes. Mark and drill a 130 mm hole for the passage of the horizontal flue terminal, ensuring that there is a 1º fall back to the boiler (17 mm per 1000 mm). Insert the terminal assembly into the flue hole. Push-fit the twin flue pipes onto the concentric to twin converter box ensuring that the exhaust pipe connects to the exhaust connection on the concentric to twin converter. If necessary cut the plain ends (male) of the twin flue pipes to allow connection to the concentric to twin converter. TE Before cutting twin flue pipes ensure allowances have been made for connection onto the previous piece and onto the concentric to twin converter. The last twin flue pipes must be pushed 50mm onto the male sockets of the concentric to twin converter. connects to the exhaust connection on the concentric to twin converter. If necessary cut the plain ends (male) of the twin flue pipes to allow connection to the concentric to twin converter. TE Before cutting twin flue pipes ensure allowances have been made for connection onto the previous piece and onto the concentric to twin converter. The last twin flue pipes must be pushed 50 mm onto the male spigots of the concentric to twin converter. You must ensure that the entire flue system is properly supported and connected. Ensure that any horizontal sections of pipe have a 1º fall towards the appliance (17 mm per 1000 mm). The convertor box on the vertical terminal will have to be temporarily removed when inserting the terminal through the flashing. The condensate trap must be primed with water prior to commissioning the boiler. convertor box convertor box condensate trap Fig. 11 TE You must ensure that the entire flue system is properly supported and connected. When cutting an extension to the required length, you should ensure that the excess is cut from the plain end of the extension. Remove any burrs, and check that both seals are located properly. Seal the flue terminal assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted VERTICAL TERMINATION (fig. 12) The twin flue system must be converted to the dedicated concentric flue kit for termination. The vertical terminal is supplied with a built-in converter box and cannot be shortened. A 130 mm hole is required for the passage of the concentric terminal through the ceiling and/ or roof. Depending on site conditions it may be preferable to install the terminal assembly prior to fitting the twin flue pipes. Fit the appropriate flashing plate to the roof and insert the vertical flue terminal through the flashing plate from the outside, ensuring that the collar on the flue terminal fits over the flashing. Push-fit the twin flue pipes onto the concentric to twin converter ensuring that the exhaust pipe condensate trap Fig CONNECTING THE GAS AND WATER The appliance is supplied with an accessories pack that contains large and small sealing washers, service valves, and pipe connections. The service valves are of the compression type, the pipe connections have plain copper ends. When connecting pipework to the valves or connections, tighten the compression end first, then insert the sealing washers before tightening the valve or connection to the appliance. It will be necessary to hold the valve or connection with one spanner whilst tightening with another GAS (fig. 6) The appliance is supplied with a 15 mm service valve, connect a 15 mm pipe to the inlet of the valve, and tighten both nuts. TE It will be necessary to calculate the diameter of the gas pipe to ensure the appliance has an adequate supply of gas. Compact 13

16 4.6.2 FLOW & RETURN (fig. 6) The appliance is supplied with 22 mm service valves for the heating connections, connect 22 mm pipe to the inlet of each valve and tighten both nuts SAFETY VALVE (fig. 6) The appliance is supplied with a 15 mm compression coupling. Connect a 15 mm pipe to the coupling and tighten. It may be necessary to fit a non-return valve if the installation is subject to mains knock, in order to eliminate false activation of the domestic hot water flow switch COLD WATER INLET (fig. 6) The appliance is supplied with a 15mm stopcock, connect a 15mm service pipe to the inlet of the service valve and tighten both nuts. It may be necessary to fit a pressure reducing valve if the installation is subject high-pressure fluctuations or high pressure surges HOT WATER OUTLET (fig. 6) The appliance is supplied with a 15 mm copper tail, connect a 15 mm pipe and suitable coupling to the tail and tighten. The discharge pipe must have a continuos fall away from the boiler to outside and allow any water to drain away thereby eliminating the possibility of freezing. The discharge pipe must terminate in a position where any water possibly boiling discharges safely without causing damage or injury, but is still visible. 4.7 ELECTRICAL CONNECTIONS The electrical supply must be as specified in 3.7/ 3.7A. the appliance is supplied, pre-wired with a 1.0 metre length of flex, connect the wires as follows: connect the Brown wire to the L (Live) terminal of the plug or fused isolator connect the Blue wire to the N (Neutral) terminal of the plug or fused isolator connect the Green/Yellow wire to the E (Earth) terminal of the plug or isolator ensure the plug or fused isolator is fitted with a 3 amp fuse. If this method of connection is unsuitable, please refer to section 8. A qualified electrician should connect the electrical supply to the appliance. The electrical supply must be as specified in section 3.7/3.7A. A qualified electrician should connect the electrical supply to the appliance. If controls external to the appliance are required, a competent person must undertake the design of any external electrical circuits, please refer to section 8 for detailed instructions. ANY EXTERNAL CONTROL OR WIRING MUST BE SERVED FROM THE SAME OLATOR AS THAT OF THE APPLIANCE. The supply cable from the isolator to the appliance must be 3-core flexible sized 0.75mm to BS Wiring to the appliance must be rated for operation in contact with surfaces up to 90 ºC CASING REMOVAL To gain access to the appliance electrical connections you must first remove the casing, proceed as follows: Locate and remove the 3 screws that secure the outer casing to the appliance (fig 13). Gently pull one side of the casing then the other to disengage it from the retaining clips. Lift the casing upward to disengage it from the top locating hooks and then remove. Store the casing and screws safely until required. Re-fit in the reverse order. Fig. 13 Control panel screws and casing screws ELECTRICAL CONNECTION The appliance terminal strip is located behind the control fascia (fig. 14). TE If it is anticipated that external controls will be required please refer to the wiring diagrams in section 8 for more detailed information. Fig Compact

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