Alpha CD13R Installation And Servicing Instructions
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Alpha CD13R Installation And Servicing Instructions

Wall mounted, fan assisted, room sealed, gas fired, high efficiency condensing regular boiler range
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Installation and Servicing

Alpha CD13R,18R and 24R
Wall Mounted, Fan Assisted, Room Sealed, Gas Fired,
High Efficiency Condensing Regular Boiler Range
Instructions
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0870 3001964
website:www.alpha-innovation.co.uk
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
British Gas
Alpha CD13R
Alpha CD18R
Alpha CD24R
For use with Natural Gas only
Leave these instructions with the User
Service Listed
G.C. No. 41 532 05
G.C. No. 41 532 03
G.C. No. 41 532 04

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Summary of Contents for Alpha Alpha CD13R

  • Page 1: Installation And Servicing

    Installation and Servicing Instructions Alpha CD13R,18R and 24R Wall Mounted, Fan Assisted, Room Sealed, Gas Fired, High Efficiency Condensing Regular Boiler Range For Technical help or for Service call ... ALPHA HELPLINE Tel: 0870 3001964 website:www.alpha-innovation.co.uk Nepicar House, London Road,...

  • Page 2: Table Of Contents

    13 Service record ........34 INTRODUCTION The Alpha CD Regular range of high efficiency condensing boilers are wall mounted, fan assisted room-sealed boilers. The burner is lit electronically and the heat output is controlled by a modulating fan and gas valve.

  • Page 3: Technical Data

    5.1 mm Power Consumption 55 W Main Burner Injector CD13R/18R 5.25 mm Internal Fuse F2 A CD24R Electrode Spark Gap 3 - 4 mm White Flue - Outer Duct Flue - Inner Duct Plastic Alpha CD13R, 18R, 24R - Technical Data...
  • Page 4 Note: This Appliance Must Be Earthed An optional integral two channel Clock kit (Part No. 6.1000220) is available if required. Note: Only use the Alpha two channel clock. Do not fit any single channel clocks. Fuse - Always fit fast blow 2 A...
  • Page 5 Primary return temperature sensor Ignition electrodes Venturi Flame sensing electrode Main burner Venturi negative point Primary/condensing heat exchanger Venturi positive point Room sealed chamber Gas service cock Condensate trap Pressure differential test points Fig. 2 Alpha CD13R, 18R, 24R - Technical Data...

  • Page 6: General Boiler Information

    2. Under no circumstances must the flue length (including allowances for extra bends) exceed 12 metres horizontally and only 15 metres vertically. 3. Failure to use Alpha CD flue components with the boiler will invalidate the boilers CE approval, guarantee and may be unsafe.
  • Page 7 VERTICAL FLUE OPTIONS Not less than 300 mm Not less than 300 mm Not less than 300 mm Not less than 300 mm Hmax = 15 m Hmax = 13.2 m Fig. 3 Alpha CD13R, 18R, 24R - General Boiler Information...
  • Page 8 However, If the terminal is fitted less than 2 m above a surface where there is no public access, the terminal must be protected by a terminal guard. A suitable guard is available from Alpha Therm Ltd. For further information refer to BS 5440 Pt1:2008.
  • Page 9 CENTRAL HEATING SYSTEM - Fig. 5 and 5a The boiler is designed for use in an open or (if the alpha sealed system kit is used) sealed central heating system in accordance with the requirements of BS 5449 and BS 6798.
  • Page 10 Fig. 7 3.10 FLUSHING THE HEATING SYSTEM It is essential that the central heating system is thoroughly cleaned and flushed when fitting an Alpha CD boiler. Failure to do so will invalidate the warranty. The primary and condensing heat exchanger is constructed in stainless steel and therefore is compatible with most materials used in a heating system.
  • Page 11 3.11 DISPOSAL OF CONDENSATE Provision must be made for the safe disposal of condensate produced by the flue gases of the Alpha CD boilers and reference should be made to BS 6798: 2000 for the requirements on the disposal of condensate.

  • Page 12: Installation

    130 mm dia. flue hole using a 127 mm core drill. Drill the fixing holes (10 mm dia.) to accept the No.10 plugs supplied. Using the screws supplied, fit the mounting bracket. Alpha CD13R, 18R, 24R - Installation...
  • Page 13 Ensure that the gas isolation valve is closed (spindle flats at right angles to valve) and do not turn on the gas supply at this stage. A - Gas valve B - Gas isolating valve C - Condensate trap Fig. 13 Alpha CD13R, 18R, 24R - Installation...
  • Page 14 FIT THE FLUE - Figs. 14, 15 The following procedure applies to fitting an Alpha CD Easy-Flue to both rear or side exit flue - horizontally only. The CD Easy-Flues are suitable for use in the flue length ranges shown in the tables below.
  • Page 15 Side Flue (B + C) Comments CD13R/18R Up to:- 11.93 m max 11.89 m max Alpha CD 750 mm or 1000 mm flue extension CD24R Up to:- 11.96 m max 11.89 m max (Part No. 6.2000750 or 6.2001050) is required to extend the range of telescopic flue.
  • Page 16 Determine the overall flue length as described in Section 4.6, paragraph 2 to determine the number of Alpha CD 750/1000 mm flue extensions required. Assemble the flue extensions together by locating the inner duct into the seal joint and secure each extension together with the clamps supplied (three screws).
  • Page 17 FIT THE CLOCK KIT - Fig. 21 Ensure the electrical supply to the boiler is isolated. Note: Only use an Alpha two channel clock. Do not fit a single channel clock. Remove the two screws securing the clock cover at the rear of the control panel.

  • Page 18: Commissioning

    P1 and P2 as shown in Fig 23. Allow the boiler to run for 10 minutes and check the differential burner pressures. Set the selector switch to 'ON'. The burner will light at the ignition rate and will increase to the factory pre-set maximum output after approximately 4 minutes. Alpha CD13R, 18R, 24R - Commissioning...
  • Page 19 If the inlet gas pressure is not 20 mbar, either the pipework is too small or the gas supply to the house is insufficient, in which case contact your gas supplier. If the differential burner pressures are still incorrect contact Alpha.

  • Page 20: Boiler Operation

    A, B and C flashing on and off at the same time - Temperature sensor wiring or flow and return connections incorrect. Note: Do not hold the selector switch in the reset position (3) for more than 2 to 3 seconds. Alpha CD13R, 18R, 24R - Boiler Operation...

  • Page 21: Routine Servicing

    Six nuts and washers Gas pipe securing combustion union chamber front assembly Viewing window Room sealed panel fixing screws Ignition generator Pressure tube assembly connections Condensate trap Fan assembly fixing screws Fig. 25 Alpha CD13R, 18R, 24R - Routine Servicing...
  • Page 22 Raise the control panel and secure in position with the two screws provided. Replace the front case panel and secure in position. Check the operation of the boiler. (Refer to Boiler Operation, Section 6). Return all controls to their original settings. Alpha CD13R, 18R, 24R - Routine Servicing...

  • Page 23: Component Replacement

    Gain access behind the room sealed chamber panel as described in Section 8.1. Undo the gas inlet pipe union to the combustion chamber front to gain access. Unscrew the damaged injector and screw in a replacement. Re-assemble in reverse order. FAN - Fig. 27 Alpha CD13R, 18R, 24R - Component Replacement...
  • Page 24 Fit the new assembly and re-assemble in reverse order. Carry out a soundness test. Light the boiler and set the gas valve to the settings stated on the instruction sheet provided with the new valve. Alpha CD13R, 18R, 24R - Component Replacement...
  • Page 25 Fig. 28 8.15 CLOCK (if fitted) - Refer to Fig. 21 Note: For replacement only use an Alpha two channel clock. Do not fit a single channel clock. Gain access behind the control panel as described in Section 8.1. Remove the two screws securing the clock cover at the rear of the control panel.
  • Page 26 Disconnect the inlet and drain connection of the condensate trap. Remove the fixing screw and lift the trap from its location. Fill the new trap with water and fit it to the boiler and re-assemble in reverse order. Alpha CD13R, 18R, 24R - Component Replacement...

  • Page 27: Wiring Diagrams

    REMOVE LINK FROM TERMINALS 1 & 2 - Green AND CONNECT 230/240 V SWITCHED LIVE TO G/Y - Green/Yellow TERMINAL1. - White Gy - Grey A FROST THERMOSTAT IS INCORPORATED Pk - Pink WITHIN THE MAIN PCB - Purple Alpha CD13R, 18R, 24R - Wiring Diagrams...
  • Page 28 Primary Flow Temperature Sensor Primary Return Temperature Sensor Transformer Note: Main Terminal Block TO CONNECT EXTERNAL CONTROL REMOVE LINK FROM TERMINALS 1 AND 2 AND CONNECT 230/240 V SWITCHED LIVE TO TERMINAL 1. Alpha CD13R, 18R, 24R - Wiring Diagrams...

  • Page 29: Fault Finding

    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 servicing or replacement of parts ensure the gas and electrical supplies are isolated. 10.2 CENTRAL HEATING - Follow operational sequence Alpha CD13R, 18R, 24R - Fault Finding...
  • Page 30 Check pressure tubes are connected Ensure gas is on and purged Gas at burner PCB - X7 connector, Adjust gas valve Replace gas valve is 240 V across terminals 26, 27 Replace PCB Alpha CD13R, 18R, 24R - Fault Finding...
  • Page 31 10.3 FAULT FINDING SOLUTIONS F to I Alpha CD13R, 18R, 24R - Fault Finding...

  • Page 32: Short Parts List

    Ignition electrode and lead 3.013626 Fig. 26 Ignition electrode 1.016779 E94-418 Fig. 27 E96-572 Flame sensing electrode and lead 1.019293 Fig. 26 Combustion chamber insulation panel front E94-420 1.014732 Fig. 25 Condensate trap 3.016875 Alpha CD13R, 18R, 24R - Short Parts List...

  • Page 33: Benchmark Checklist

    The operation of the appliance and system controls have been demonstrated to the customer The manufacturer's literature has been left with the customer COMMISSIONING ENG'S NAME: Print ..............CORGI ID No........... Sign ..............Date ..............Alpha CD13R, 18R, 24R - Benchmark Checklist...

  • Page 34: Service Record

    Company Name ................Company Name ................Telephone No................Telephone No................CORGI ID card serial No............CORGI ID card serial No............Comments ................... Comments ..........................................................Signature ..................Signature ..................Alpha CD13R, 18R, 24R - Service Record...
  • Page 35 Alpha CD13R, 18R, 24R...
  • Page 36 These instructions have been carefully prepared but we reserve the right to Nepicar House, London Road, Wrotham Heath, alter the specification at any time in the interest of product improvement. Sevenoaks, Kent TN15 7RS © Alpha Therm Limited 2008. Tel: 0870 3001964 email: info@alphatherm.co.uk website:www.alpha-innovation.co.uk Part No.

This manual is also suitable for:

Cd18rCd24r

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