Alpha E-Tec 25R Installation And Servicing Instructions
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Alpha E-Tec 25R Installation And Servicing Instructions

Wall mounted, fan assisted, room sealed, gas fired, high efficiency condensing regular boiler
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Installation and Servicing
Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired, High Efficiency Condensing Regular Boiler
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 2018.
Instructions
E-Tec 25R
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0344 871 8764
website: www.alpha-innovation.co.uk
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
Set for use with Natural Gas
Leave these instructions with the User
Part No. 1.041526 rev. ST.003864/000
1118/D389

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Summary of Contents for Alpha E-Tec 25R

  • Page 1 E-Tec 25R Wall Mounted, Fan Assisted, Room Sealed, Gas Fired, High Efficiency Condensing Regular Boiler For Technical help or for Service call ... ALPHA HELPLINE Tel: 0344 871 8764 website: www.alpha-innovation.co.uk Nepicar House, London Road, Wrotham Heath, Sevenoaks, Kent TN15 7RS...
  • Page 2 Service Interval Record and left with the householder. www.centralheating.co.uk Useful contact details: Gas Safe Register - 0800 408 5577 - www.gassaferegister.co.uk Alpha Heating Innovation: General Sales Enquiries - 0344 871 8760 Technical Helpline - 0344 871 8764 Alpha E-Tec 25R - Benchmark Scheme...

  • Page 3: Table Of Contents

    2. It is the law that all domestic boiler installations are registered by the installer through the Gas Safe Notification Scheme. 3. The boiler must only be used with Alpha CD condensing flue components. Propane Gas (LPG) - In addition to the regulations and requirements stated, the boiler must be installed in accordance with BS 5482:1 - The Installation of Propane Burning Appliances in Permanent Dwellings.

  • Page 4: Safety Symbols

    The user must not dispose of the appliance at the end of its service life as municipal waste, but send it to appropriate collection centres. PERSONAL PROTECTIVE EQUIPMENT SAFETY GLOVES SAFETY GOGGLES SAFETY FOOTWEAR Alpha E-Tec 25R - Safety Symbols...

  • Page 5: Technical Data

    Type of installation C13, C33, C43, C53, C63, C83, C93 * with Alpha Diverter Kit or DHW relay fitted ** Sealed system - Kit required TECHNICAL PERFORMANCE DATA - LPG - PROPANE GAS (Cat I3P 3P - G31 37 mbar)
  • Page 6 Each additional CD 90° Bend is equivalent to 1.3 m of flue length. Each CD 45° Bend is equivalent to 0.9 m of flue length. The CD Vertical Flue terminal assembly is equivalent to 1 m of flue length. Alpha E-Tec 25R - Technical Data...
  • Page 7 Optional integral controls are available if required. Note: Only use the Alpha two channel controls. Do not fit any single channel controls*. Fig. 3.1 shows the Internal two channel clock option for S or Y plan. Alternatively bring a Switched Live from external controls to terminal 1.
  • Page 8 Flue temperature sensor and thermal fuse Venturi positive pressure point (+) Flue test point (pressure point +) Drain valve Primary flow sensor Air test point (pressure point -) Drain valve Condensing heat exchanger Fig. 3.2 Alpha E-Tec 25R - Technical Data...

  • Page 9: General Boiler Information

    The boiler is supplied with a 'Special X' type electrical connection with a PVC <HAR> H05W-F 3 x 0.75 cable without a plug. If the power cable is damaged or replaced, it must be replaced with a cable supplied by Alpha or authorized After-Sale Technical Service.
  • Page 10 L = A + (2 x 45° bends = 1.8 metre) Fig. 4.1 VERTICAL FLUE OPTIONS Not less than 300 mm Not less than 300 mm Hmax = 14 m Hmax = 12.2 m (14 m - 1.8 m) Fig. 4.2 Alpha E-Tec 25R - General Boiler Information...
  • Page 11 Where a terminal is sited below 2 m from the ground or floor level, the terminal must be protected by a terminal guard. In these situations, consideration should also be given to prevent nuisance plume and fumes in areas such as access routes, passageways, patios, balconies etc. Alpha E-Tec 25R - General Boiler Information...
  • Page 12 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 E-Tec 25R - General Boiler Information...
  • Page 13 CENTRAL HEATING SYSTEM - Figs. 4.5 and 4.6 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. The external pump must be able to achieve a minimum flow rate of 900 l/m on open systems or 515 l/m on sealed systems.
  • Page 14 4.11 DISPOSAL OF CONDENSATE Provision must be made for the safe disposal of condensate produced by the flue gases of the Alpha boilers and reference should be made to BS 6798 for the requirements on the disposal of condensate.
  • Page 15 Two rows of 3 x 12mm holes at 25mm centres, 50mm from the bottom Soakaway depth 400mm of the tube. Holes to face filled with limestone chippings away from house. Fig. 4.10 - External soakaway Alpha E-Tec 25R - General Boiler Information...

  • Page 16: Installation

    Condensate discharge pipe Literature pack and Wall template A suitable Alpha flue system must be selected to use with the boiler. Notes: a. All flues must be suitable for Alpha condensing boilers. b. CD 750 mm and 1000 mm flue extensions are available, if required.
  • Page 17 Bottom view Wall Condensate discharge pipe Heating flow Gas service cock (22 mm) Heating return (22 mm) Electrical connection Use compression Gas inlet (22 mm) fittings Top view Wall Fig. 5.4 Alpha E-Tec 25R - Installation...
  • Page 18 FIT THE FLUE - Figs. 5.5 and 5.6 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 19 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. 5.10 Alpha E-Tec 25R - Installation...
  • Page 20 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 5.6, paragraph 2 to determine the number of Alpha CD 750 or 1000 mm flue extensions required.
  • Page 21 Plume Management 1000 mm extension 60 mm dia. (equivalent to 1 m flue length) - Part No. 6.2001310. 60 mm dia. wall bracket - Part No. 6.2001260. Plume kit (2 x 93° bends 1 x 1000 mm extension and wall bracket) - Part No. 6.2001300. Fig. 5.12 Alpha E-Tec 25R - Installation...
  • Page 22 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. E-Tec boilers - the maximum equivalent flue length must not exceed 12 metres. Alpha E-Tec 25R - Installation...
  • Page 23 Ensure the electrical supply to the boiler is isolated. IMPORTANT - Only use an Alpha two channel clock. Do not fit a single channel clock. Remove the three screws securing the terminal block cover at the rear of the control panel, see Fig. 5.14.
  • Page 24 External Sensor – Weather compensation feature The weather compensation sensor can only be used on an E-Tec R boiler when the Alpha Diverter Kit (part No. 6.5500048) or the DHW relay kit (part No. 3.029422) are used, otherwise the DHW temperature will be affected.
  • Page 25 5.13 OPTIONAL ALPHA SYSTEM DIVERTER KIT The Alpha Diverter Kit operates as a hot water priority valve. If the heating is on and there is a hot water demand the valve will divert the primary hot water to the cylinder until the cylinder sensor is satisfied. The heating will be held off during this period so it is recommended that a high recovery cylinder is used.

  • Page 26: Commissioning

    17 Solar function (not used on this model) Domestic hot water temperature power scale 18 Functioning with external temperature probe control knob with Alpha diverter kit or 11 Operating in summer mode active (optional) DHW relay fitted 12 Operating in winter mode...
  • Page 27 Refer to Sections 5.13 and 5.14. Note: The Summer mode will only function if the Alpha Diverter kit has been fitted. When using a standard 'Y' or 'S' plan system the boiler MUST BE left in Winter mode.
  • Page 28 BOILER OPERATION With the optional Alpha Diverter Kit fitted, the E-Tec R operates with hot water priority. If the heating is on and there is a hot water demand the valve will divert the primary hot water to the cylinder until the cylinder sensor is satisfied.
  • Page 29 Fault history - by rotating the CH knob (item 6 in Fig. 6.1) in this menu the last five faults will be displayed Error code * With Alpha Diverter kit fitted it shows cylinder set temperature. With DHW relay fitted it shows the flow temperature to cylinder...
  • Page 30 Air test point F (+) A (-) Outlet pressure test point Gas outlet flow Inlet pressure adjustment screw test point (Max. CO ) Off/Set adjustment screw (Min. CO ) Wiring plug Fig. 6.2 Fig. 6.3 Alpha E-Tec 25R - Commissioning...
  • Page 31 1 - Displays the flow temperature during operation and off when no request 'Winter' mode 0 - The display shows the set value of the CH selector 1 - The display shows the flow temperature during operation and the set value with no request Alpha E-Tec 25R - Commissioning...
  • Page 32 0 - 1 1 - On Cylinder 0 - with external 230V DHW request signal (optional relay board 0 - 1 management is necessary) 1 - with optional Alpha diverter valve kit (and cylinder sensor). Alpha E-Tec 25R - Commissioning...

  • Page 33: Routine Servicing

    Section 7.1 and Section 7.3 paragraphs 1, 2 and 3 need to be carried out to allow a visual check of the components within the room sealed chamber. Alpha E-Tec 25R - Routine Servicing...
  • Page 34 10. Withdraw the complete burner/fan/air inlet assembly towards you. 11. Remove the condensate trap assembly and clean as described in Section 8.11. Case front panel fixing screw Room sealed panel fixing screws (7) Control panel fixing screws Fig. 7.1 Fig. 7.2 Alpha E-Tec 25R - Routine Servicing...
  • Page 35 To ensure correct and safe operation of the appliance, it is essential that any worn or failed components are replaced with only genuine Alpha spare parts. Use of non-genuine Alpha spares could invalidate your warranty and may pose a potential safety hazard.
  • Page 36 Flue temperature sensor and thermal fuse Primary flow temperature sensor Four fixing nuts for item 15 Combustion chamber front assembly Overheat thermostat Primary heat exchanger Boiler drain points Venturi Gas injector Primary return temperature sensor Spark generator Fig. 7.4 Alpha E-Tec 25R - Routine Servicing...

  • Page 37: Component Replacement

    Gain access as described in Section 8.1. Unplug the wire from the flue sensor. 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 E-Tec 25R - Component Replacement...
  • Page 38 It is important to clean the trap every time the trap is removed to flush out any deposits from the collection bowl. Note: Partially fill the trap before replacing. After cleaning re-fit the trap and re-connect the hoses and the locating screw. Alpha E-Tec 25R - Component Replacement...
  • Page 39 Unplug the wiring and remove the retaining pin from from the base of the thermostat. Unclip the sensor from the flow pipe. Re-assemble in reverse order using a new overheat thermostat in the same position as the original and refit the retaining pin. Alpha E-Tec 25R - Component Replacement...

  • Page 40: Wiring Diagram

    E4 ....Overheat thermostat R ..Red E14 ..Flue thermofuse W ..White G3 ....Spark generator M20..Fan R5 ....Trimmer DHW set R6 ....Trimmer CH set R14 ..Boiler configuration resistance (2.7 kohm) T2 ....Voltage transformer Y1 ....Gas valve Alpha E-Tec 25R - Wiring Diagram...

  • Page 41: Error Codes And Fault Finding

    Where an error code is displayed use the following tables to identify the fault and possible causes. 10.2 ERROR CODES AND FAULT FINDING If any fault or anomaly persists, contact Alpha Heating Innovation Technical Helpline. The history of errors can be viewed in the 'INFO' menu - d9...
  • Page 42 Check system filling and venting No primary From ignition the boiler detects no temperature Check for air locks preventing flow temperature increase rise in the primary circuit Check for blocked flow or closed valves detected Alpha E-Tec 25R - Error Codes and Fault Finding...

  • Page 43: Short Parts List

    Clip - Flow/return pipe to heat exchanger 1.026763 Clip - Gas pipe connections 1.020393 Boiler wall bracket 2.015350 Boiler accessory pack complete 3.028540 Wall template 1.041524 Burner front insulation panel 1.039141 Rear combustion insulation panel 1.040351 Alpha E-Tec 25R - Short Parts List...

  • Page 44: Energy Classification

    Contact details Alpha Therm Ltd., Nepicar House, Wrotham Heath, Kent. TN15 7RS (*) High temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet. (**) Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters 50°C return temperature.
  • Page 45 (QHE) Yearly electricity consumption for the domestic hot water function (AEC) Yearly fuel consumption for the domestic hot water function (AFC) Seasonal room heating yield (ηs) 92 % Domestic hot water production yield (ηwh) Alpha E-Tec 25R - Energy Classification...
  • Page 46 Alpha E-Tec 25R - Energy Classification...
  • Page 47 * To be established by means of table 5 of Regulation 811/2013 in case of “assembly” including a heat pump to integrate the boiler. In this case the boiler must be considered as the main appliance of the assembly. Alpha E-Tec 25R - Energy Classification...
  • Page 48 12.7 PARAMETERS FOR FILLING IN DHW PACKAGE ASSEMBLY CHART Parameter E-Tec 25R ‘I’ ‘II’ ‘III’ * To be determined according to Regulation 811/2014 and transient calculation methods as per Notice of the European Community no. 207/2013. Alpha E-Tec 25R - Energy Classification...
  • Page 49 Alpha E-Tec 25R - Energy Classification...

  • Page 50: 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 according to the manufacturer’s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty.

  • Page 51: Service Record

    SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval 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. Always use the manufacturer’s specifed spare part when replacing controls.

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