Alpha InTec 26C Installation And Servicing Instructions
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Alpha InTec 26C Installation And Servicing Instructions

Wall mounted, fan assisted, room sealed, gas fired, high efficiency condensing combination boilers
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Installation and Servicing

Instructions
Alpha InTec
26C, 30C, 34C and 24X, 28X
Range of Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired, High Efficiency Condensing Combination Boilers
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0844 871 8764
website: www.alpha-innovation.co.uk
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
British Gas
Service Listed
0051
For use with Natural Gas or Propane Gas (AS SUPPLIED)
Leave these instructions with the User

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Summary of Contents for Alpha InTec 26C

  • Page 1: Installation And Servicing

    Installation and Servicing Instructions Alpha InTec 26C, 30C, 34C and 24X, 28X Range of Wall Mounted, Fan Assisted, Room Sealed, Gas Fired, High Efficiency Condensing Combination Boilers For Technical help or for Service call ... ALPHA HELPLINE Tel: 0844 871 8764 website: www.alpha-innovation.co.uk...
  • Page 2 E-mail: info@hhic.org.uk Website: www.hhic.org.uk Useful contact details; Gas Safe Register - 0800 408 5577 - www.gassaferegister.co.uk Alpha Heating Innovation; General Sales Enquiries - 0844 871 8760 Technical Helpline - 0844 871 8764 Alpha InTec C and X - Benchmark Scheme...

  • Page 3: Table Of Contents

    Service record ........43 INTRODUCTION The Alpha InTec range of high efficiency condensing boilers are wall mounted, fan assisted room-sealed combination boilers. The burner is lit electronically and the heat output is controlled by a modulating fan and gas valve. These are combination boilers providing both central heating and domestic hot water at mains pressure.

  • Page 4: Technical Data

    Min. primary system pressure Recommended system pressure - Cold System pressure relief valve setting Expansion vessel size litres Expansion vessel charge pressure Electrical power consumption - Max. Watts Electrical power consumption - Standby Watts Alpha InTec C and X - Technical Data...
  • Page 5 Boiler dry lift weight Max. total flue length Horizontal Max. total flue length Vertical Flue system diameter 60/100 60/100 60/100 60/100 60/100 Factory fitted Filling loop Seasonality valve GasSaver compatible - Solar compatible Alpha InTec C and X - Technical Data...

  • Page 6: Technical Data

    WARNING Ensure Control wires are RF Climatic connected correctly - refer to the control receiver control and boiler instructions for (optional) connection details. RF Climatic Optional Alpha controls control (optional) Fig. 1 Alpha InTec C and X - Technical Data...

  • Page 7: Boiler Schematic

    24 - Gas service cock 37 - Flow regulator (if fitted) 12 - Flue hood 25 - Mains inlet on/off valve 13 - Overheat thermostat 26 - On/off valve (2 off) Fig. 2 Alpha InTec C and X - Technical Data...

  • Page 8: General Boiler Information

    2. Under no circumstances must the flue length (including allowances for extra bends) exceed 12 metres horizontally and only 14 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 9 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 InTec C and X - General Boiler Information...
  • Page 10 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. Alpha InTec C and X - General Boiler Information...
  • Page 11 The boiler may be installed in a cupboard or compartment, provided it is correctly designed for that purpose, i.e. complies with the Building Regulations and the requirements of BS 6798. Alpha InTec C and X - General Boiler Information...
  • Page 12 Drain taps (to BS 2879) must be used to allow the system to be completely drained. Hose unions Double check valve assembly Heating circuit Mains return water Stop Stop supply valve valve Test cock Filling loop temporarily connected Fig. 7 Alpha InTec C and X - General Boiler Information...
  • Page 13 FLUSHING THE HEATING SYSTEM It is essential that the central heating system is thoroughly cleaned and flushed when fitting an Alpha InTec boiler. Failure to do so will invalidate the warranty. The primary condensing heat exchanger is constructed in stainless steel and therefore is compatible with most materials used in a heating system.
  • Page 14 Seasonality valve (C models only) - This valve maintains the hot water temperature (factory set) for both summer and winter conditions by automatically changing the flow rate through the boiler. However, if adjustment of the setting is required, refer to Section 5.6.2. Alpha InTec C and X - General Boiler Information...

  • Page 15: Installation

    140 mm, 185 mm if the wall jig is used (ensure the lines are horizontal). Template This will give the position of the centre of the hole for the flue. Fig. 11 Alpha InTec C and X - Installation...
  • Page 16 D - Cold water mains inlet (15 mm) B - Hot water outlet (15 mm) E - Heating return (22 mm) C - Gas inlet (22 mm) F - Pressure relief valve (15 mm) Fig. 13a - Without wall jig Alpha InTec C and X - Installation...
  • Page 17 FIT THE FLUE - Figs. 14 and 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 18 Note: Ensure that all cuts are square and free from burrs. Once assembled with the components pushed home, the flue is fully sealed. Allow 20 mm 30 mm Do not cut past this point Fig. 19 Alpha InTec C and X - Installation...
  • Page 19 Use the template (supplied with the boiler) to mark the required flue position, ensure the slope towards the boiler is correct. Determine the overall flue length as described in Section 4.6, paragraph 2 to determine the number of Alpha CD 750 or 1000 mm flue extensions required.
  • Page 20 Plume Management 45° bend 60 mm dia. (each 45° bend equivalent to 0.9 m flue length) Plume Management 1000 mm extension 60 mm dia. (equivalent to 1 m flue length) 60 mm dia. wall bracket Fig. 21 Alpha InTec C and X - Installation...
  • Page 21 Note: The equivalent horizontal flue assembly length + the equivalent plume management length (PM length) must not exceed the maximum flue length stated for each boiler, i.e. Alpha CD boiler maximum equivalent flue length must not exceed 12 metres. Alpha InTec C and X - Installation...
  • Page 22 Ensure the electrical supply to the boiler is isolated. Important: Only use the Alpha single channel controls. Do not fit any two channel controls. Remove the three screws securing the terminal block cover at the rear of the control panel.

  • Page 23: Commissioning

    Loosen the gas inlet pressure test point screw on the gas valve (see Fig. 26). Ensure the gas supply is on and open the boiler service cock to purge in accordance with BS 6891. Retighten the test point screw and test for gas tightness. Close the boiler gas service cock. Alpha InTec C and X - Commissioning...
  • Page 24 If the selector is set for hot water only - The burner is turned off, the fan will continue to run for 50 seconds and the pump will stop immediately. In both modes the fan modulates according to the output required. Alpha InTec C and X - Commissioning...
  • Page 25 Thoroughly flush out the water pipework (refer to Section 3.9) and with no pressure in the boiler heating circuit, empty the cyclone (if applicable) at it's drain point (see Fig. 13) of any debris. Clean the mains water inlet filter (see Fig. 13). Re-pressurise the system as described in Section 5.1. Alpha InTec C and X - Commissioning...
  • Page 26 Mains inlet temperature or FlowSmart cylinder temperature (if sensor fitted) °C Not used Fault history - by rotating the CH knob (item 6 in Fig. 25) in this menu the last five faults will be displayed Error code Alpha InTec C and X - Commissioning...

  • Page 27: Routine Servicing

    2. The expansion vessel pressure test point is accessible from inside the boiler at the front. Check that the condensate trap drain pipe is connected and all joints are sound. Record details of the service in the Service Record at the back of these instructions. Alpha InTec C and X - Routine Servicing...

  • Page 28: Component Replacement

    Note: Before removing the cap, ensure that the water released from the trap can be contained to avoid spillage. The trap will contain no more than 200 cc of condensate water. Replace the drain cap. Alpha InTec C and X - Routine Servicing...
  • Page 29 Raise the control panel and secure in position with the two screws provided. Check the operation of the boiler. (Refer to Sections 5.4 and 5.5). Return all controls to their original settings. Alpha InTec C and X - Routine Servicing...

  • Page 30: Component Replacement

    Gain access to the room sealed chamber as described in Section 7.1. Undo the gas pipe union to the combustion chamber front to gain access. Unscrew the damaged injector and screw in a replacement. Re-assemble in reverse order. Alpha InTec C and X - Component Replacement...
  • Page 31 Gain access behind the front panel as described in Section 7.1. Disconnect the wiring. Using a 13 mm spanner, turn the sensor 90° anti-clockwise and withdraw it from the heat exchanger. Fit the new sensor and re-assemble in reverse order. Alpha InTec C and X - Component Replacement...
  • Page 32 Withdraw the motor forwards from the valve body. Re-assemble in reverse order with a new motor. Retaining DHW temperature sensor clip Diverter valve motor and assembly DHW Flow switch Flow switch bottom fixing screw Fig. 32 Alpha InTec C and X - Component Replacement...
  • Page 33 7.14 ALPHA CONTROLS (if fitted) - Fig. 24 Note: For replacement only use an Alpha single channel control. Do not fit a two channel control. Gain access behind the control panel as described in Section 7.1. Remove the three screws securing the terminal block cover at the rear of the panel.
  • Page 34 Insert the new air vent using a new washer and turn it clockwise to lock it in position. Refill and pressurise the system. (Refer to Commissioning, Section 5.1). Primary pressure switch Pressure gauge sensor position Automatic air vent Pump Pressure relief valve Drain point Pressure gauge Fig. 34 Alpha InTec C and X - Component Replacement...
  • Page 35 The mains water inlet filter is located in the body of the DHW flow switch. Refer to Section 7.17 to remove the flow switch. The filter can be removed using a small screwdriver. Clean the filter and re-assemble in reverse order. Alpha InTec C and X - Component Replacement...
  • Page 36 Gain access behind the front casing and drain the hot water circuit as described in Sections 7.1 and 7.2. Remove the valve by disconnecting the unions from the bottom of the boiler, the mains inlet valve and filling loop. Re-assemble in reverse order using a new valve. Alpha InTec C and X - Component Replacement...

  • Page 37: Wiring Diagrams

    DHW SET Remove the link between terminal block connections 1 and 2 if the 12 34 5 6 optional Alpha Climatic control or Alpha controls (optional) 230 V room thermostat is used. Transformer Alpha InTec C and X - Wiring Diagrams...
  • Page 38 (15 - 20 V DC) Sensor (optional) Transformer Note: Main Terminal Block Gas Valve PCB Connection To connect external controls remove link from terminals 1 and 2 and connect 240 V switched live to terminal 1. Alpha InTec C and X - Wiring Diagrams...

  • Page 39: Error Codes And Fault Finding

    Cylinder sensor faulty FlowSmart only) Internal wiring error Incorrect wiring configuration detected Check internal wiring connections to PCB Combination boiler DHW sensor X4 System boiler link X14 Refer to wiring diagram Alpha InTec C and X - Error Codes and Fault Finding...
  • Page 40 If the temperature Heat exchanger air flow blocked continues to rise the boiler will lock out and E03 Flue restriction will be displayed Flue sensor fault Pump fault Alpha InTec C and X - Error Codes and Fault Finding...

  • Page 41: 10 Short Parts List

    1.023999 Burner (30C - 28X) 1.026281 Diverter valve motor 1.028572 Pressure switch 1.027277 DHW heat exchanger 12 plate (26C - 24X) 1.028657 DHW heat exchanger 14 plate (30C - 28X) 1.028658 DHW heat exchanger 18 plate (34C) 1.028660 1.030267 Condensate trap bowl 1.029697...

  • Page 42: Benchmark Checklist

    GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.

  • Page 43: Service Record

    SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.
  • Page 44 These instructions have been carefully prepared but we reserve the right to alter the specification at any time in the interest of product improvement. Sevenoaks, Kent TN15 7RS © Alpha Therm Limited 2011. Tel: 0844 871 8764 email: info@alpha-innovation.co.uk website: www.alpha-innovation.co.uk Part No.

This manual is also suitable for:

Intec 30cIntec 34cIntec 24xIntec 28x

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