Ideal Boilers Classic FF 340 LF Installation And Servicing Manual
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Ideal Boilers Classic FF 340 LF Installation And Servicing Manual

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Summary of Contents for Ideal Boilers Classic FF 340 LF

  • Page 2: Sedbuk No

    GENERAL DATA Table 1 - General Data Boiler Size FF 340 LF FF 350 LF FF 360 LF Gas supply connection (in. BSP) Rc 1/2 (1/2) 1/2" (BSP Female) Flow connection 22mm copper Return connection 22mm copper Maximum static water head m (ft.) 30.5 (100) Minimum static water head...

  • Page 3: Table Of Contents

    Boiler Exploded View ..........11 Models G.C. Appliance No. Burner Exploded View ..........39 Classic FF 340 LF ......41 392 90 Control Box Exploded View ........39 Classic FF 350 LF ......41 392 91 Conversion long flue kit ..........14 Classic FF 360 LF ......

  • Page 4: Gas Safety

    GENERAL INTRODUCTION BS.6891 Low pressure installation pipes. BS.6798 Installation of gas fired hot water boilers of rated input The Classic FF340-360 LF are automatically fully controlled, wall not exceeding 70 kW. mounted, fanned gas boilers. BS.5449 Forced circulation hot water systems. The heat exchanger is cast iron.

  • Page 5: Boiler Water Connections

    GENERAL BOILER WATER CONNECTIONS This appliance in NOT suitable for use in a direct hot water system or for gravity circulation. 2 BOILER CLEARANCES Front clearance: 533mm (21") from the front of the boiler casing. The following minimum clearances must be maintained for operation and Minimum front clearance when servicing.

  • Page 6: Flue Installation

    GENERAL Where installation will be in an unusual location, special Table 3 - Balanced flue terminal position procedures may be necessary and BS.6798 gives detailed Approved Manufacturer’s Clearances guidance on this aspect. Terminal Position Minimum Spacing Compartment Installations 1a. Directly BELOW an opening, air brick, A compartment used to enclose the boiler MUST be designed opening window, etc.

  • Page 7: Trv's

    GENERAL Table 5 - Water flow rate and pressure loss AIR SUPPLY Detailed recommendations for air supply are given in Boiler Size FF 340 LF FF 350 LF FF 360 LF BS.5440:2. In IE refer to I.S. 813:2002. Boiler 11.7 14.7 17.6 Output...

  • Page 8: Pump

    GENERAL ELECTRICAL SUPPLY Note. Where a room sealed appliance is installed in a room containing a WARNING. The appliance MUST be efficiently earthed. bath or shower then the appliance and any electrical switch or Wiring external to the appliance MUST be in accordance with the appliance control utilising mains electricity should be so situated current I.E.E.
  • Page 9 GENERAL SEALED SYSTEM REQUIREMENTS Note. 4. Expansion Vessel The method of filling, refilling, topping up or flushing sealed a. A diaphragm type expansion vessel must be connected primary hot water circuits from the mains via a temporary hose at a point close to the inlet side of the pump, the connecting connection is only allowed if acceptable to the local water authority.
  • Page 10 GENERAL SEALED SYSTEM REQUIREMENTS - continued draw-off points at a lower level then a double check valve 7. Mains Connection shall be installed upstream of the draw-off point. There must be no direct connection to the mains water supply c. Through a temporary hose connection from a draw-off tap or to the water storage tank supplying domestic water, even supplied from a service pipe under mains pressure.

  • Page 11: Appliance Serial No. On Data Badge

    INSTALLATION BOILER ASSEMBLY - Exploded view Classic FF 340 LF shown LEGEND 1A. Heat exchanger. Fan. Collector hood assembly. Flue baffles. Wall mounting plate. Combustion chamber. 44B. Programmer (optional). Tie rods. Main burner. Back panel 4A. Pumped flow pipe. Control box .
  • Page 12 INSTALLATION UNPACKING Pack A Contents The boiler is supplied fully assembled in Pack A, together with a The complete boiler standard flue assembly for rear or side flue outlet, in Pack B. Installation & Servicing Instructions User's Instructions Unpack and check the contents. Hardware Pack (listed below) Wall mounting template Wall mounting plate...

  • Page 13: Determining The Flue Length

    INSTALLATION PACKAGING AND CASING REMOVAL 1. Unpack the boiler. 2. Remove the casing as follows and place to one side to (a) Casing retaining screws, 2 off avoid damage. a. Undo the 2 casing retaining screws (a) retaining the casing to the back panel. b.

  • Page 14: Conversion Long Flue Kit

    INSTALLATION 11 INSTALLING THE CONVERSION KIT To convert your existing Classic FF into a Classic FF LF you will need the contents of the kit, detailed below: Contents No. off Collector hood and restrictor plate assy. FF340 LF ....... 157 066 ........1 Collector hood and restrictor plate assy.

  • Page 15: Rear Installation

    INSTALLATION 12 FLUE ASSEMBLY - Exploded View 1. An optional flue duct extension kit is required for wall thicknesses greater than 600mm (23 ") Refer to Frame 10. 2. When cutting the ducts, always use the cardboard support rings LEGEND provided.

  • Page 16: Fitting The Flue Assembly

    INSTALLATION 15 CUTTING THE FLUE - wall thicknesses of 114 to 600mm Note. If the stand-off brackets are used it is essential that 30mm is added to the measured wall thickness when marking the flue (to allow for the thickness of the brackets). 1.

  • Page 17: Mounting The Boiler

    INSTALLATION 19 MOUNTING THE BOILER Note. Have ready to hand the M8 screw, washer and rectangular plate supplied in the hardware pack. For downward routing of pipes the M5 spacer (supplied in the Downward Piping Kit) should now be fitted to the back of the boiler.

  • Page 18: Side Installation

    INSTALLATION 22 FLUE ASSEMBLY - Exploded view 1. An optional flue duct extension kit is required for lengths (distance from the outside wall to the relevant side of the boiler casing) greater than 600mm (23 ") Refer to Frame 10 . LEGEND 2.
  • Page 19 INSTALLATION 26 FITTING THE FOAM SEAL 25 CUTTING THE FLUE For flue lengths 114 to 600mm ONLY 1. To determine the position for the foam seal measure the wall thickness and mark it onto the flue, measuring from 1. Measure the flue length required (i.e. the distance from the groove near the terminal.

  • Page 20: Fitting The Side Outlet Plates

    INSTALLATION 29 FITTING THE SIDE OUTLET PLATES 30 WALL MOUNTING PLATE Note. If the boiler is fitted closer than 25mm to the side wall 1. Fix the mounting plate to the wall with the No.14 x 50mm the side outlet plate must be fitted now. wood screws.

  • Page 21: Extension Ducts - Fitting

    INSTALLATION 32 CONNECTING THE FLUE TO THE BOILER 1. Pull the flue through the side outlet plate and locate the 3 studs in the hole in the side of the boiler. 2. Secure the flue to the boiler using the three M5 nuts provided.
  • Page 22 INSTALLATION 35 FLUE EXTENSION DUCTS - continued Flue length General arrangement Extension tube Extension duct Note. Side flue shown. 1. A maximum of 5 uncut extension ducts (plus the standard flue duct) may be used together. 2. Flue extensions of greater length than 1m (39") should be supported with the bracket provided.

  • Page 23: 39 Electrical Connections

    INSTALLATION 38 WATER CONNECTIONS 37 GAS CONNECTION Refer to 'Gas Supply ', page 6. 1. Remove the plastic plugs from the flow and Refer to Frame 2 for gas inlet service dimensions. return pipes. A minimum pressure of 20 mbar MUST be available at the boiler inlet with the boiler operating.

  • Page 24: Time And Temperature Control To Heating

    INSTALLATION 41 PICTORIAL WIRING LEGEND blue bk black br brown gy grey or orange pk pink violet white y/g yellow/green 42 MID POSITION VALVE Pumped only Notes. 1. Some earth wires are omitted for clarity. Ensure proper earth continuity when wiring. 2.

  • Page 25: Frost Protection

    INSTALLATION 43 TWO SPRING CLOSED VALVE Pumped only Notes. 1. Some earth wires are omitted for clarity. Ensure proper earth continuity when wiring. 2. Numbering of terminals on thermostats is specific to the manufacturer. 3. This is a fully controlled system - set the boiler thermostat to maximum.

  • Page 26: Initial Lighting

    INSTALLATION 45 COMMISSIONING AND TESTING The Benchmark Log Book or equivalent self certification should be completed and signed to demonstrate compliance with Building Regulations. B. GAS INSTALLATION A. ELECTRICAL INSTALLATION 1. The whole of the gas installation, including the meter, MUST be 1.
  • Page 27 INSTALLATION 47 INITIAL LIGHTING - continued 48 GENERAL CHECKS d. Balance the system. 5. Finally, set the controls to the user's requirements. Make the following checks for correct operation: The temperatures quoted below are approximate and vary 1. Set the boiler thermostat knob to position 6 and operate between installations.

  • Page 28: Servicing

    INSTALLATION 50 SCHEDULE f. Remove any debris from inside the base of the casing. To ensure the continued safe and efficient operation of the appliance, it is recommended that it is checked at regular g. Check that the flue terminal is unobstructed and that the intervals and serviced as necessary.

  • Page 29: Cleaning The Fan Assembly / The Flueways

    INSTALLATION 53 CLEANING THE FAN ASSEMBLY / THE FLUEWAYS 1. Remove the 2 silicon rubber tubes from the fan sensing points. 2. Disconnect the fan leads. 3a. Rear flue Slacken the M4 screw securing the flue connector to the fan. Disconnect the connector from the fan and slide into the flue.

  • Page 30: Spares Replacement

    SERVICING 56 GAS PRESSURE ADJUSTMENT PILOT MAIN BURNER The pilot is factory set to maximum and no further After any servicing, reference should be made to Table 2 adjustment is possible. If, after removing and checking the which quotes details of the rated output with the related injector (as detailed in Frame 61) and ensuring that there is burner setting pressure and the heat input.
  • Page 31 SERVICING 60 THERMOSTAT CONTROL, THERMISTOR SENSOR LEAD and ON/OFF SWITCH REPLACEMENT Refer also to Frame 57. A. Remove the fixing screws B. Swing the control box down into the servicing position. Thermostat control 1. Pull the knob off the shaft. 2.

  • Page 32: Pilot Burner Replacement

    SERVICING 61 LIMIT THERMOSTAT REPLACEMENT 1. Refer to Frame 57. 2. Remove the limit thermostat assembly from the boiler flow pipe. 3. Disconnect the electrical connectors 4. Replace and reassemble in reverse order, taking care to correctly position the limit thermostat as shown in the orientation diagram opposite.

  • Page 33: Ignition Electrode And Lead Replacement

    SERVICING 63 IGNITION ELECTRODE AND LEAD REPLACEMENT 1. Refer to Frame 57. 2. Remove the burner and air box assembly. Refer to Frame 52. 3. Remove the electrode retaining nut. 4. Remove the pilot shield. 5. Remove the ignition electrode and integral lead. 6.
  • Page 34 SERVICING 66 FAN REPLACEMENT 1. Refer to Frame 57 2. Remove the 2 silicon rubber tubes from the fan sensing points. 3. Disconnect the fan leads. 4a. Rear flue. Slacken the M4 screw securing the flue connector to the fan. Disconnect the connector from the fan and slide into the flue. 4b.

  • Page 35: Heat Exchanger Replacement

    SERVICING 70 HEAT EXCHANGER REPLACEMENT 7. Remove the thermostat sensors from the pockets on the heat exchanger by removing the M3 screws and plates. Note. Refer to Frame 7 (Boiler assembly - Exploded view) for 8. Slacken 3 turns only the 4 heat exchanger / inter-panel illustration of the procedure detailed below.

  • Page 36: Fault Finding

    FAULT FINDING START Check mains supply and fuses. Reset the overheat 'stat. Set control Is the mains on neon 'I3' illuminated? 'stat to maximum. Allow the boiler Check programmer and system to reach temperature - if the thermostats are all ON. overheat 'stat trips again, measure Check that boiler plug and socket flow temperature.

  • Page 37: Short List Of Parts

    When replacing any part on this appliance use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Ideal Boilers.
  • Page 38 LIST OF PARTS 73 SHORT PARTS LIST 13 A cla 6113 74 BOILER CASING ASSEMBLY Classic FF 340 - 360 LF - Installation & Servicing...

  • Page 39: Burner Exploded View

    LIST OF PARTS 75 CONTROL BOX - Exploded View LEGEND 19. Control box. 21. Thermostat potentiometer. 23. Printed circuit board. 26. Thermostat knob. 58. Mains on/off switch. 76 BURNER ASSEMBLY - Exploded View LEGEND 10. Burner manifold 11. Air box and pilot assembly. 12.
  • Page 40 Technical Training The Ideal Boilers Technical Training Centre offers a series of first class training courses for domestic, commercial and industrial heating installers, engineers and system specifiers. For details of courses please ring: ....01482 498 432 The code of practice for the installation, commissioning &...

This manual is also suitable for:

Classic ff 350 lfClassic ff 360 lf

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