Benchmark Alpha InTec 18SNG Service Manual

Installation and ServicingInstructionsAlpha InTec26C, 30C, 34C and 24X, 28XRange of Wall Mounted, Fan Assisted, Room Sealed,Gas Fired, High Efficiency

103.5 FLUE TERMINAL LOCATION - Figs. 4 and 5Notes:1. In addition, the terminal should not be nearer than 150 mm to the framework of an opening into

11Proximity of flue duct outlets to boundariesThe flue duct shall be sited so that it is at least 600 mm (see Fig. 5) from the boundary line when facing

123.7 CENTRAL HEATING SYSTEM - Fig. 6The boiler is designed for use in a sealed central heating system in accordance with the requirements of BS EN 1

133.9 FLUSHING THE HEATING SYSTEMIt is essential that the central heating system is thoroughly cleaned and flushed when fitting an Alpha InTec boiler.

14Fig. 9 - External soakawayFig. 8 - External gullyAlpha InTec C and X - General Boiler InformationOpen end of pipediverted into gullybelow grid but a

154.3 PREPARE THE WALL - Fig. 11If the optional wall jig is used refer to the instructions supplied with the kit.1. Decide upon the position of the

16Alpha InTec C and X - Installation4. Cut the 110 mm diameter hole (or use a 107 mm core drill) in the wall for the flue. Notes: 1. Ensure the hol

17Fig. 164.6 FIT THE FLUE - Figs. 14 and 15The following procedure applies to fitting an Alpha CD Easy-Flue to both rear or side exit flue - horizontal

18Alpha InTec C and X - Installation5. Position the smaller Easy-Flue 40 mm clamp (with seal) supplied, over the bend. Fit the bend to the boiler and

19Alpha InTec C and X - Installation4.8 EXTENDING THE FLUE - Fig. 20Note: The flue assembly length must not exceed the maximum length stated, includi

2Alpha InTec C and X - Benchmark SchemeBENCHMARK SCHEMETo comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be installed

20Alpha InTec C and X - Installation10. Secure the flue assembly to the bend with the clamp ensuring it is positioned centrally over the joint, ensuri

21Alpha InTec C and X - InstallationPM length = C + (1 x 93° bend = 1.3 m) + (2 x 45° bends = 1.8 m)CMin.400 mmCD Easy-FlueFlue sealing collarTerminal

224.10 CONNECT THE MAINS SUPPLY - Fig. 231. Gain access to the boiler terminal block by releasing the two fixing screws (one each side) securing

235 COMMISSIONINGFig. 25When commissioning the boiler, ensure the Benchmark Checklist at the back of these instructions is completed.5.1 FILL THE SY

24Alpha InTec C and X - Commissioning5.4 INITIAL LIGHTING - Refer to Fig. 251. Before turning on the gas and electrical supplies check the heating s

25Fig. 26Fig. 27Max. COadjustment2Outletpressuretest pointInletpressuretest pointMin. COadjustment(under cap)2+-+-P1P2Alpha InTec C and X - Commission

26Alpha InTec C and X - Commissioning5.8 FINAL ASSEMBLY1. Raise the control panel and secure in position with the screws provided. Note: If the wal

27To ensure efficient operation of the boiler it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of ser

28Alpha InTec C and X - Routine Servicing6.2 PREPARE FOR SERVICING - Fig. 281. Ensure the electrical supply is isolated and the gas supply is off.2.

296.4 RE-ASSEMBLE THE BOILER1. Replace the burner, ensuring it is located correctly and secure it in position using the four screws previously remov

3CONTENTS1 Introduction ...32 Technical data ...43 General boiler information

30Alpha InTec C and X - Component Replacement7 COMPONENT REPLACEMENTIt is the law that any service work must be carried out by a competent person, i.

317.6 FAN - Fig. 281. Gain access behind the room sealed chamber as described in Section 7.1.2. Remove the two screws securing the air supply pipe

32Alpha InTec C and X - Component Replacement7.10 GAS VALVE - Fig. 30Note: The replacement of the gas valve or PCB must be carried out by a Gas Safe

337.14 ALPHA CONTROLS (if fitted) - Fig. 24Note: For replacement only use an Alpha single channel control. Do not fit a two channel control.1. Gain ac

34Alpha InTec C and X - Component Replacement7.20 DHW FLOW SWITCH - Fig. 321. Gain access behind the front casing as described in Section 7.1.2. I

357.23 PRIMARY TEMPERATURE SENSOR - Fig. 301. Gain access as described in Section 7.1 and drain the heating circuit described in Section 7.2.2. Dis

36Alpha InTec C and X - Component Replacement7.29 MAINS WATER INLET FILTER - Fig. 131. The mains water inlet filter is located in the body of the DHW

378.1 ILLUSTRATED WIRING DIAGRAM8 WIRING DIAGRAMSGasValveBrGyBkWWOrOrGyGyRWBlOrBkGRGBr BlG/YRRBkWWGGRGyBlSparkGeneratorFlameSensingElectrodeIgnition

38Alpha InTec C and X - Wiring Diagrams8.2 FUNCTIONAL FLOW WIRING DIAGRAMAlpha Control(Optional)1234PumpGas ValveFlowSensorDHW InletSensor (optional)

399 ERROR CODES AND FAULT FINDING9.1 CARRY OUT INITIAL FAULT FINDING CHECKS1. Check that gas, electrical and water supplies are available at the bo

42 TECHNICAL DATAAlpha InTec C and X - Technical Data2.1 TECHNICAL PERFORMANCE DATA - NATURAL GAS (Cat I2H 2H - G20 20 mbar)Heat input gross - DHW

40Alpha InTec C and X - Error Codes and Fault FindingErrorcodeFault Fault description Possible causesCheck flame sensing electrode and leadPCB faultChe

41Alpha InTec C and X - Short Parts List10 SHORT PARTS LISTReferenceDescriptionBritish Gas GC No.Alpha Pt. No.Qty.1.0181623.0203803.0171061.0204121.0

This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstratingcompliance with

© Heating and Hotwater Industry Council (HHIC) www.centralheating.co.ukAll installations in England and wales must be notified to Local Authority Buil

Manual compiled and designed by Publications 2000 - Tel: 01670 356211 09/13/D330Part No. 1.030787 Rev 15.035283/000These instructions have been car

5Alpha InTec C and X - Technical Data2.2 TECHNICAL PERFORMANCE DATA - PROPANE GAS (Cat I3P 3P - G31 - 37 mbar)Heat input gross - DHW kWHeat input g

6Alpha InTec C and X - Technical DataNote: This Appliance Must Be EarthedOptional integral single channel controls are available if required.Note: Onl

72.7 BOILER SCHEMATIC1 - Heat exchanger thermal fuse2 - DHW flow switch, filter and flow regulator3 - Diverter valve4 - Gas valve5 - Primary t

83.1 GAS SUPPLYThe meter and supply pipes must be capable of delivering the required quantity of gas in addition to the demand from any other applian

9HORIZONTAL FLUE OPTIONS - Lmax = 12 metresL = B + C + E + 245 mmAlpha InTec C and X - General Boiler InformationL = B + C + 245 mmCBECBEBFBCL = B + E