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7. ELECTRICAL SUPPLY

The boiler requires a 230/240 V ~ 50 Hz supply, fused at 3 A if a 13 A 3-pin plug is used or a 5 A fuse if any other type of plug is used.

To connect a plug:-
The colour of the wires in the mains lead of the boiler may not correspond with the coloured markings identifying the terminals
in your plug. In this case proceed as follows:-

The wire coloured green and yellow must be connected to the terminal in the plug that is marked with the letter E, or by the
earth symbol

, or coloured green or green and yellow.

The blue wire must be connected to the terminal which is marked with either the letter N or coloured black.
The brown wire must be connected to the terminal which is marked with the letter L or coloured red.

THE APPLIANCE MUST BE EARTHED.

6

GAS SAFETY REGULATIONS

Current Gas Safety (Installation and Use) Regulations:-

It is the law that all gas appliances are installed and serviced by a competent person, ie CORGI registered personnel. Failure to
install or service appliances correctly could lead to prosecution. It is in your interest and that of safety to ensure compliance
with the law. The manufacturer's instructions must not be taken in any way as over-riding statutory obligations.

The Benchmark Log Book must be fully completed by the installer on installation of the boiler. All CORGI registered installers
carry a CORGI ID card and have a registration number. Both should be recorded in your central heating Log Book. You can
check your installer is CORGI registered by calling CORGI on 01256 372300.

Manual compiled and designed by Publications 2000 - Tel: (01670) 356211

These instructions have been carefully prepared but we
reserve the right to alter the specification at any time in
the interest of product improvement.
© Alpha Therm Limited 2001.

10/01/D122

Part No. 1.015429

Alpha Therm Limited.
Goldsel Road, Swanley, Kent BR8 8EX
Tel: (01322) 669443
Fax: (01322) 615017

7

FAULT FINDING FOR THE USER

If you experience a problem of no heating, try to solve the problem by following the simple checks below before calling out a
service engineer.

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Содержание SY24

Страница 1: ...Room Sealed Gas Fired System Boiler Goldsel Road Swanley Kent BR8 8EX Fax 01322 615017 For Technical help or for Service call ALPHA HELPLINE Tel 01322 669443 Alpha SY24 G C No 41 532 01 HEJEID I Service Listed For use with Natural Gas only Leave these instructions with the User ...

Страница 2: ...fety Installation and Use Regulations All relevant Building Regulations issued by the Department of the Environment Building Standards Scotland Consolidation Regulations issued by the Scottish Development Department Health Safety Document No 635 The Electricity At Work Regulations 1989 The installation should also be in accordance with the following British Standard Codes of Practice BS 5440 1 200...

Страница 3: ...ing Heat Input kW Gross Btu h Heat Output modulating kW Btu h Burner Pressure mbar Settings in wg Gas Rate m h ft h Burner Main Heat exchanger Main Burner Injectors Flue Outer Duct Flue Inner Duct Stainless steel Copper 1 30 mm x12 White Aluminium 2 3 COMPONENTS Central Heating Sealed System Max Working System Pressure Min System Pressure Max System temperature Pressure Relief Valve Setting Expans...

Страница 4: ...1 m for vertical terminal assembly Maximum flue length 4 m Each additional 90 Bend is equivalent to 1 m of flue length Each 45 Bend is equivalent to 0 5 m of flue length The Vertical Flue terminal assembly is equivalent to 1 m of flue length 2 8 AVAILABLE PUMP HEAD FOR CENTRAL HEATING gal min 3 7 2 8 2 3 1 8 1 5 Btu h 79 500 60 000 50 000 40 000 31 700 kW 23 3 17 58 14 65 11 63 9 3 metres 2 4 3 8 ...

Страница 5: ...sealed chamber 6 Fan 7 Air pressure switch 8 Flue hood 9 Overheat thermostat 10 Expansion vessel 11 Automatic air vent Fig 2 12 Pump 13 Drain point 14 Pressure relief valve 15 Ignition electrodes 16 Flame sensing electrode 17 Flue sampling point 18 Gas service cock 19 Primary pressure switch 20 On off valve 2 off 21 Automatic by pass ...

Страница 6: ...ervicing must always be maintained Note A cupboard or compartment used to enclose the boiler must be designed and constructed specifically for the purpose i e comply with the Building Regulations 3 4 FLUE SYSTEM Fig 3 The flue system must be installed in accordance with BS 5440 1 For horizontal flues ensure there is a slight downward slope towards the terminal Flue components are available as foll...

Страница 7: ...NTAL FLUE OPTIONS Lmax 4 metres L B C E 185 mm Alpha SY24 General Boiler Information L B C 185 mm C B E C B E B F B C L B E F 185 mm 90 bend 1 metre L B C 185 mm 2 x 45 bends 1 metre Fig 3 VERTICAL FLUE OPTIONS ...

Страница 8: ...ple have access the terminal must be protected by a terminal guard A suitable guard is available from Tower Flue Components Ltd Vale Rise Tonbridge Kent TN9 1TB 3 6 BOILER LOCATION The boiler is not suitable for external installation The boiler must be installed on a flat vertical wall which is capable of supporting the weight of the boiler The boiler can be fitted to or adjacent to a wall compris...

Страница 9: ...st point in the system Mains water supply Stop valve Test cock Double check valve assembly Overflow Heating circuit return Heating circuit return Mains water supply Double check valve assembly Stop valve Test cock Air inlet valve Filling loop temporarily connected Hose unions Fig 6 Fig 7 3 8 FILLING THE CENTRAL HEATING SYSTEM Figs 6 7 The system design pressure cold should be set to 1 0 bar This p...

Страница 10: ...ray 4 2 CLEARANCES REQUIRED Fig 8 Fig 8 4 3 PREPARE THE WALL Figs 9 10 1 Decide upon the position of the boiler taking into account the clearances required for servicing and the flue terminal position 2 Tape the template to the wall ensure it is level and the right way up and mark the position of the holes for the boiler mounting bracket and bottom fixings If rear exit flue is used mark the positi...

Страница 11: ... bottom tray by removing the four fixing screws When all the connections have been checked for soundness replace the tray and secure with the four screws previously removed The heating union bends have been designed to enable the heating pipes to be routed from above and or below using the same fitting Note When soldering to the boiler union bends ensure the bends are not connected to the valves o...

Страница 12: ...the outer duct of the flue immediately before the terminal Push the flue assembly through the 127 mm flue hole so that the collar completely passes through the wall Then pull the flue assembly back into the correct position Visually check that the collar is sealing the outside wall and that it is not restricting any of the openings of the flue terminal 10 Position the seal and clamp two screws sup...

Страница 13: ...length finished wall thickness 172 mm Side flue Outer air duct length finished wall thickness the distance from the inside wall to the side of the boiler 145 mm Inner flue duct length finished wall thickness the distance from the inside wall to the side of the boiler 182 mm 5 When measuring the outer duct measure from the end of the tube as shown in Figs 12 and 13 6 Cut both the inner and outer du...

Страница 14: ... is pulled out of its clamp the live and neutral wires become taut before the earth wire The main terminal block can be removed by pulling it off the pins to give easy access to the terminals Do not switch on the electrical supply at this stage 3 If an external control i e room thermostat or external clock is to be fitted remove the terminal block cover and remove the link between terminals 1 and ...

Страница 15: ...ter may be released from the system by manually operating the drain point see Fig 2 until the system design pressure is obtained The system design pressure cold should be between 0 75 and 1 25 bar Refer to sections 3 7 and 3 8 System volume and Filling the system 5 2 BOILER CONTROLS Fig 15 Alpha SY24 Commissioning 5 COMMISSIONING Fig 15 5 3 TEST FOR GAS SOUNDNESS AND PURGE THE SUPPLY 1 With the bo...

Страница 16: ...ser s requirements 3 If the boiler is not to be handed over immediately close the boiler gas service cock and switch off the electrical supply 4 If there is any possibility of the boiler being left during frost conditions then the boiler and system should be drained refer to section 8 2 It is recommended that a label is attached to the boiler drawing attention to the fact that the system has been ...

Страница 17: ... switch will prevent the boiler from operating 6 2 FROST THERMOSTAT The boiler incorporates a built in frost thermostat which automatically turns on the boiler and pump if the water in the boiler falls below 8 C providing the electrical supply is on and the selector switch set to The boiler will operate until the water temperature in the system reaches approximately 40 C 6 3 PUMP If the electrical...

Страница 18: ...allowing water to escape from the system check that this is actually happening 6 Refill vent and re pressurise the system as necessary Refer to Commissioning section 5 1 If the system pressure exceeds 2 5 bar when operating at maximum temperature the heating expansion vessel should be checked and re pressurised if necessary Note 1 Check the expansion vessel charge only when the system pressure is ...

Страница 19: ...e in position 7 Raise the control panel and secure in position with the two screws provided 8 Check the operation of the boiler Refer to Boiler Operation section 6 9 Return all controls to their original settings Alpha SY24 Routine Servicing Component Replacement 8 COMPONENT REPLACEMENT It is the law that any service work must be carried out by a competent person ie CORGI registered personnel Warn...

Страница 20: ...move the screw securing the electrode and withdraw the electrode Fit the new electrode ensuring both are positioned correctly and the spark gap is correct see Fig 18 Re assemble 1 Replace the burner ensuring it is located correctly 2 Replace the combustion chamber front cover ensuring it is correctly located especially on the sides 3 Complete re assembly as described in Routine Servicing section 7...

Страница 21: ... section 8 1 2 Disconnect the coil wires and pressure tube from the gas valve 3 Loosen the one screw securing the electrical plug and disconnect the plug 4 Disconnect the burner manifold union and the gas inlet pipe union from the manifold 5 Remove the two manifold screws from beneath the boiler 6 Carefully push the valve towards the rear of the boiler take care not to damage the manifold sealing ...

Страница 22: ... 2 Remove the four screws securing the combustion chamber front cover and remove the cover 3 Remove the overheat thermostat section 8 9 and the CH temperature sensor section 8 17 4 Remove the right hand side baffle plate by lifting it up 5 Disconnect the two unions from the heat exchanger flow and return pipes 6 Lift up the heat exchanger off the pipes and remove it by carefully withdrawing it out...

Страница 23: ... the system Refer to Commissioning section 5 1 8 19 PUMP Refer to Fig 23 Gain access behind the casing and drain the boiler heating circuit as described in sections 8 1 and 8 2 Pump head 1 Remove the four socket head screws securing the pump head to the body Withdraw the head remove the wiring cover and disconnect the wiring 2 Connect the wiring to the new head as follows Brown to L Blue to N Gree...

Страница 24: ...ove the boiler or a rear exit flue is used it is not possible to replace the vessel in which case an additional vessel should be fitted external to the boiler in the central heating return pipe as close to the boiler as possible see Fig 5 1 Gain access behind the casing and drain the boiler heating circuit as described in sections 8 1 and 8 2 2 Disconnect the pipe from the pump inlet manifold and ...

Страница 25: ...25 Alpha SY24 Wiring Diagrams 9 1 ILLUSTRATED WIRING DIAGRAM 9 WIRING DIAGRAMS ...

Страница 26: ...26 9 2 FUNCTIONAL FLOW WIRING DIAGRAM Alpha SY24 Wiring Diagrams ...

Страница 27: ...Earth Continuity Resistance to Earth Short Circuit and Polarity with a suitable meter Note These checks must be repeated after any servicing or fault finding 3 Ensure all external controls are calling for heat and check all external and internal fuses 4 Check that the gas and water pipework has been connected to the correct connections on the boiler and all valves are open However before any servi...

Страница 28: ...28 10 3 FAULT FINDING SOLUTION SECTIONS A to F Alpha SY24 Fault Finding ...

Страница 29: ...29 Alpha SY24 Fault Finding 10 4 FAULT FINDING SOLUTION SECTIONS G to J ...

Страница 30: ...Pressure gauge Ignition electrode right Ignition electrode left Flame sensing electrode Ignition electrode lead Flame sensing electrode lead By pass assembly Combustion chamber insulation panel set Description British Gas GC No E57 720 E57 733 E57 736 E57 665 E57 666 E76 342 E57 668 E76 320 E76 374 E76 317 E76 378 E57 700 E57 702 E57 703 E57 709 E57 710 E57 712 E57 713 E57 714 E65 195 E57 717 E65 ...

Страница 31: ...TAILS OF BOILER INSTALLATION Date of Installation Name of Installer Address Postcode Telephone No Boiler Serial Number see data label on inside of left hand case panel DETAILS OF BOILER SERVICE HISTORY Date of Service Details of Service Service Engineer ...

Страница 32: ...Alpha Therm Limited Goldsel Road Swanley Kent BR8 8EX Tel 01322 669443 Fax 01322 615017 Part No 1 016236 These instructions have been carefully prepared but we reserve the right to alter the specification at any time in the interest of product improvement Alpha Therm Limited 2001 ...

Страница 33: ...017 For Technical help or for Service call ALPHA HELPLINE Tel 01322 669443 Alpha SY24 G C No 41 532 01 HEJEID I Service Listed Alpha SY24 Wall Mounted Fan Assisted Room Sealed Gas Fired System Boiler For use with Natural Gas only Leave these instructions with the User ...

Страница 34: ...owing conditions apply Neon B Flashing very slowly every 5 seconds Electricity supply to the boiler is on B Illuminated continuously Burner is alight B Flashing on and off Temperature sensor fault contact your Service Engineer A Flashingonandoff Overheatthermostathasoperated Rotateselectorswitchtotheresetposition 3 toreset Ifthiscontinues to happen contact yor Service Engineer A Illuminated contin...

Страница 35: ... this position the pump will automatically operate for 5 minutes in every 24 hours If the water temperature falls below 8 C the built in frost thermostat will operate the boiler automatically until the temperature of the water in the heating system has been raised To turn the boiler off for longer periods Switch off the electrical supply to the boiler If required all supplies i e gas water and ele...

Страница 36: ... CORGI registered personnel Failure to install or service appliances correctly could lead to prosecution It is in your interest and that of safety to ensure compliance with the law The manufacturer s instructions must not be taken in any way as over riding statutory obligations The Benchmark Log Book must be fully completed by the installer on installation of the boiler All CORGI registered instal...

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