VOKERA Linea 24 Installation & Servicing Instructions Manual
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VOKERA Linea 24 Installation & Servicing Instructions Manual

The linea range combined central heating and domestic hot water appliance
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The
Linea 24 Linea 28
Range
Installation
& Servicing
Instructions
British Gas Service Listed
G.C. No. 47 094 27 (Linea 24)
G.C. No. 47 094 28 (Linea 28)
G.C. No. 47 094 29 (Linea Plus)
THESE INSTRUCTIONS
TO BE RETAINED
BY USER

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  • Page 1 Linea 24 Linea 28 Installation & Servicing Instructions British Gas Service Listed G.C. No. 47 094 27 (Linea 24) G.C. No. 47 094 28 (Linea 28) G.C. No. 47 094 29 (Linea Plus) THESE INSTRUCTIONS TO BE RETAINED BY USER...

  • Page 2: Table Of Contents

    Checking Electrical supply Lighting The Boiler Checking Burner Pressures Range Rating C/H Checking The Flue System Checking The Heating Thermistor Regulating The C/H System Final Flushing The C/H System Filling & Testing H/W System Final Checks For Operation Linea 24 & 28...

  • Page 3: Introduction

    SECTION 1 INTRODUCTION These appliances are designed for use with a The Vokèra Linea 24 & 28 are combined sealed heating system only and are not in- central heating and domestic hot water appli- tended for use on an open vented system.

  • Page 4: Schematic Diagram

    40 C. NOTE Fig. 2 NOTE: pressure switch. Senses water pressure in the KEY: Central Heating Return. primary circuit and operates the pressure switch Central Heating Flow. (22) Hot Water Outlet. Cold Water Inlet. Linea 24 & 28...

  • Page 5: Technical Data

    Min. input 11.6 kW (39,590 Btu/h)(gross)(h/w) Vertical 14/14m 14/14m Max. output 28.0 kW (95,563 Btu/h) Min. output 9.9 kW (35,836 Btu/h)(c/h) The reduction in flue length for each bend Min. output 8.7 kW (29,692 Btu/h)(h/w) used is listed opposite. Linea 24 & 28...

  • Page 6: Working Pressure (H/W & C/H)

    The curve has been modified to allow for the pressure drop Burner Details Main burner: through the appliance. Polidoro type NP12 Main burner injectors 12 x 1.35 Fig. 3 Linea 24 & 28...

  • Page 7: General Requirements

    The effect of such ‘steaming’ must be consid- Where the installation of the boiler will be in an ered. unusual location special procedures may be necessary and BS 6798:1987 gives detailed guidance on this aspect. Linea 24 & 28...

  • Page 8: Air Supply

    4.6.1 The following notes are given for general A suitable guard is available from Vokera Ltd. guidance. Part No 018, G.C. No. 301 106 4.6.2 Pipework...
  • Page 9 Fig. 5 Fig. 5a N.B. Vokèra Ltd recommend a 2-pipe system. Single pipe systems are more liable to be troublesome unless carefullly designed and installed. Linea 24 & 28...

  • Page 10: Filling Point

    Timber framed buildings If the appliance is to be fitted in a timber framed building, it should be fitted in accordance with the Institute of Gas Engineers publication (IGE/UP/7) ‘Guide for Gas Installations in Timber Frame Buildings’. Linea 24 & 28...

  • Page 11: Installation

    (Fig. 11) 5.3.3 Ensure the casing and screws are put to one Fig. 11 Fig. 10 Case Screws Case screws (one either side) Linea 24 & 28...

  • Page 12: Mounting The Appliance

    ‘Y’. Once the telescopic flue terminal vertical flue applications to be considered, has been adjusted to the correct length, secure the flue alternatively, the Vokera twin flue system can assembly with the screw supplied. be utilised if longer flue runs are required.

  • Page 13: Fitting The Flue (Vertical)

    Vertical flue terminal 1.0 metre 0225770 Pitched roof flashing plate 0225765 Flat roof flashing plate 2359069 750mm extension 750mm 2359079 1500mm extension 1500mm 2359049 45º bend (pair) 2359059 90º bend Fig. 13A 0225760 Wall bracket (5) Linea 24 & 28...

  • Page 14: Fitting The Flue (Twin)

    5.5.3 TWIN FLUE SYSTEM mark and cut a 105mm hole in the ceiling and/or roof. The Vokera twin flue system enables greater flue distances to be achieved (see 5.4.2) than Fit the appropriate flashing plate to the roof and insert that of the standard concentric flue system.
  • Page 15 If necessary cut the plain ends (male) of the twin flue pipes to allow connection to the concentric to twin converter. Fig. 16 Linea 24 & 28...
  • Page 16 The last twin flue pipes must be pushed 50mm onto the male spigots of the concentric to twin converter. Linea 24 & 28...

  • Page 17: Connecting Gas & Water Supplies

    4.7. If controls external to the appliance are required, design of the external electrical cir- cuits should be undertaken by a competent Mains Input and person. External Con- trols Terminal See Section 10 for further advice. Block Fig. 19a Linea 24 & 28...
  • Page 18 Normal tors become taut before the earthing conductor. Operating Position Fig.22 Do not connect wires to this terminal strip Closed Position Filling Position Controls terminal strip Linea 24 & 28...

  • Page 19: Commissioning

    / off / mode switch (20) to remedy any leaks discovered. 6.5.3 Set the c/h control knob (16) to the highest setting. 6.5.4 The appliance will go through an ignition se- quence and the burner will light. Linea 24 & 28...

  • Page 20: Checking Burner Pressures

    Adjust hot water control knob to it's maximum setting. Allow boiler to operate for approximately 5 - 10 minutes before checking gas pres- sures. Gas Valve U Gauge Tube Fig.23 Manometer Linea 24 & 28...

  • Page 21: Range Rating C/H

    The appliance will therefore ignite pe- dosage. riodically to maintain heat within the appli- 6.10.2 Inspect the system for soundness. Turn the ance. appliance off at the mode selector switch (fig. 1, 20). Linea 24 & 28...

  • Page 22: Final Checks For Operation

    Section 10 Appendices A and B at the rear of this manual provides full instruction for fitting and wiring the optional built-in time switches and for wiring to external controls. Fig. 26 Fig. 25 Case Screws Case screws (one either side) Linea 24 & 28...

  • Page 23: Servicing Instructions

    3. Occasional maintenance of mechanical when the system is cold See 6.3.4 working parts will be necessary. Service 5. Turn off mains electricity and turn off gas kits are available from ypur local Vokèra service tap on the appliance. stockists. Linea 24 & 28...

  • Page 24: To Gain General Access

    NOTE: When refitting the combustion cham- ber front cover it is essential to correctly seat and secure the cover in place ensuring both clips are secured in place. Fig. 28 a Fig. 28 b Fig. 28 c Linea 24 & 28...

  • Page 25: Main Burner & Electrode

    Close heating flow and return valves by turn- ing 1/4 turn until indicating lines are horizon- tal. Pull lever on head of safety valve to drain primary circuit to boiler. 8.8.7 Place cloth under heat exchanger to catch surplus water. Fig. 30 Linea 24 & 28...

  • Page 26: Fan

    To remove side combustion chamber insula- Fig. 31 tion boards, gently prise upwards and pull out. 8.11.4 To remove rear board, gently prise upwards and pull out. 8.11.5 Fourth panel (front) is replaced complete with combustion chamber front panel. Linea 24 & 28...

  • Page 27: Ignition Pcb

    8.13.10 Test all joints for gas soundness. 8.13.11 Check burner pressures. As detailed in 6.6 If incorrect adjust as instructed in 8.23. Silicon Pipe Connection Point Pipe Securing Clip Pump Securing Modulator Bracket Coil Fig. 32 Fig. 33 Linea 24 & 28...

  • Page 28: Pump

    8.15.4 Open lowest draw-off or drain tap on hot water system. Pump Pipe Union Pump Gas Valve & Ignition Control Domestic Heat Diverter Valve Exchanger Safety Valve Domestic Hot Water Flow Switch Pressure Switch Fig. 34 Linea 24 & 28...

  • Page 29: Domestic Heat Exchanger

    If the vessel cannot be repressurised or if pressure loss is very frequent the expansion vessel will require changing. Alternatively, a new vessel can be fitted in the return to the appliance, and the old vessel isolated in situ. Linea 24 & 28...

  • Page 30: Safety Valve

    Domestic Heat Exchanger Domestic Hot Water Thermistor Water Flow Regulator Domestic Hot Water Heat Exchanger Retaining Screws Pressure Switch Diverter Valve and Flow Switch Manifold Safety Valve Diverter Valve Bobbin Diverter Valve Cover Motorised Valve Fig.35 Linea 24 & 28...

  • Page 31: Motorised Valve

    8.5. Remove R/H side panel as fig.29 8.21.32a PRIMARY Fig. 36 Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are hori- zontal. Pull lever on head of safety valve to drain primary circuit to boiler. Linea 24 & 28...

  • Page 32: Setting Gas Pressures

    1.3 mbar. connected to plug JP9. plus or minus 0.13 mbar. Gas pressure adjustment protective cover Fig. 37 Maximum pressure Minimum pressure ad- adjustment screw (a) justment screw (b) Linea 24 & 28...
  • Page 33 Refit casing and clean up. temperature of the system. Once achieved the appliance will modulate to LED 1 to 4 suit system load. Jumper JP9 Minimum Adjustment Button Minimum Fig. 38 Adjustment Potentiometer Linea 24 & 28...

  • Page 34: Operational Checks & Wiring

    The pump and fan are started simultaneously which results in a changeover of the pressure differential switch. Once this action has been proven the gas valve will be energised and the electrode will start to spark. Linea 24 & 28...

  • Page 35: Diagnostic Error Codes

    To ensure that internal/external controls (if fitted) do not interfere with fault finding, disconnect the wires from terminals TA & TA (labelling them in the process to ensure correct reconnection) and provide a solid link between TA & TA. Linea 24 & 28...

  • Page 36: Checking Operation Of Electronic Control Board

    START LINEA 24 / 28 TEST A : CHECKING OPERATION OF ELECTRONIC CONTROL BOARD AT START UP TURN MODE SELECTOR SWITCH TO HOT WATER IS THE POSITION DIVERTER VALVE IN THE DHW POSITION 230V ON MOTORISED IS THE LED VALVE BETWEEN...
  • Page 37 PRESSURE BETWEEN TERMINALS DIFFERENTIAL M5.4 AND M3.3 SWITCH ON PCB CHECK THE FAN AND/OR FLUE ASSEMBLY CHECK WIRING AND REPLACE THE CONNECTIONS GREEN LED ALIGHT CHECK WIRING AND CONNECTIONS HIGH LIMIT THERMOSTAT OR RESTART THE TEST Linea 24 & 28...
  • Page 38 WAIT FOR BOILER TO COOL RESTART THE TEST IS THE LED GREEN ELECTRONIC IS THE LED IGNITION GREEN CONTROL REPLACE PCB CHECK WIRING AND REPLACE RESTART THE CONNECTIONS, HIGH ELECTRONIC TEST LIMIT THERMOSTAT IGNITION AND PCB CONTROL Linea 24 & 28...
  • Page 39 START LINEA 24 / 28 TEST B : CHECK CONTROL IN DHW MODE TURN MODE SELECTOR SWITCH TO H/W POSITION AND H/W THERMOSTAT TO MAXIMUM TURN ON TAP THERE A VOLTAGE >10 VDC BETWEEN TERMINALS M4.1 & M4.2 DOES ON PCB...
  • Page 40 START LINEA 24 / 28 TEST C: CHECK CONTROL IN C/H MODE TURN MODE SELECTOR SWITCH TO C/H SET C/H THERMOSTAT TO MAX. OPERATE R/STAT OR CLOCK, OR LINK TERMINALS TA & TA ON PLUG M16 240V BETWEEN M11.1 &...
  • Page 41 ELECTRONIC IGNITION BOX PRESSURE PRESSURE SWITCH IS GAS VALVE OPERATING CHECK THE WATER CIRCUIT REPLACE GAS CHECK GAS REPLACE VALVE SUPPLY PRESSURE SWITCH THERE 24 VDC BETWEEN TERMINALS M3.5 & M5.4 ON PCB REPLACE ELECTRONIC CB Linea 24 & 28...
  • Page 42 DIGITAL DISPLAY SHOWING DIGITAL DISPLAY SHOWING REPLACE PCB DIGITAL DISPLAY SHOWING 06 CHECK DHW NTC SENSOR OR CONNECTION DIGITAL DISPLAY SHOWING CHECK FLOW NTC SENSOR OR CONNECTION REPLACE PCB Linea 24 & 28...
  • Page 43 REPLACE DHW REPLACE PCB FLOW SWITCH DOES DHW FLOW SWITCH IS DHW NTC OK REPLACE DHW FLOW SWITCH WATER FLOW TEMPERATURE REPLACE DHW REPLACE PCB < 78˚C DOES SWITCH IS DHW NTC OK REPLACE DHW REPLACE PCB Linea 24 & 28...
  • Page 44 DOES PUMP WATER FLOW REPLACE FLOW TEMPERATURE < 78˚C REPLACE PCB BOILER AT LOCK OUT IS FLOW NTC OK DOES REPLACE PCB PUMP SWITCH RESET BOILER. WAIT REPLACE FLOW ABOUT 10 SECS. REPLACE PCB RESTART TEST Linea 24 & 28...
  • Page 45 WATER FLOW TEMPERATURE SWITCH CH >40 ˚C THERMOSTAT TO MAX. REPLACE PCB BURNER AND FAN SWITCH ON TIMER JUMPER PRESENT AT JP8 ON REMOVE WAIT 3 MIN. JUMPER JP8 ON PCB RESTART THE REPLACE PCB TEST Linea 24 & 28...

  • Page 46: Section 10 Appendix

    (as fig. 5). ROOM THERMOSTAT Remove the loop between terminals = & TA Fig. 2 connect room thermostat between TA & TA (as fig. 6). Clock Multiplug Connector Vokera room thermostat Fig. 4 Fig.3 Linea 24 & 28...
  • Page 47 N, and the earth to the earthing strip. ii) Terminal marked = is a spare terminal used to connect controls. (Remove Internal link between = & TA ) time clock Linea 24 & 28...

  • Page 48: External Time Clock Installation

    COMMON Appliance Room Terminal Thermostat Block Remove link between = & TA (iii) Randall Time Switch and Vokera Room Thermostat. Earths have been omitted for clarity To ease wiring conges- Randall tion at the appliance Time switches terminal strip, remove the...

  • Page 49: S & Y Plan Installations

    NOTE: WHEN USING A 'Y' PLAN INSTALLATION THE MODE SELECTOR SWITCH WILL BE OVERRIDEN BY THE CONTROL CIRCUIT. To ease wiring conjestion at the appliance terminal strip, remove the wiring harness normally used for internal clock connection. Linea 24 & 28...

  • Page 50: Exploded Diagrams

    Instrumental panel 10021951 10022015 Ignition module 10021848 10021848 Door panel 1862 1498 Wiring harness 10021117 10021117 Quick primer pressure gauge 1857 1857 Wiring harness 1980 1980 Hole cap 8654 8654 Wiring harness 1780 1780 1867 1867 Linea 24 & 28...
  • Page 51 5208 Washer 5026 5026 Water supply stop cock 10023567 10023567 Flexible pipe 10023570 10023570 Clip 1820 1820 1824 1824 Non return valve 10023569 10023569 1823 1823 Connection 1790 1790 Heating cock 10023566 10023566 Clip 1890 1890 Linea 24 & 28...
  • Page 52 2903 2903 Washer 5041 5041 Bracket 2940 2940 Washer 5023 5023 By-pass valve 2047 2047 Washer 5026 5026 Pump lock key 9263 9263 Wiring harness 10020530 10020530 Venting plugs kit 01005137 01005137 Wiring harness 1873 1873 Linea 24 & 28...
  • Page 53 1823 1823 Washer 5072 5072 Clip 1890 1890 Glass 3139 3139 NG plate 5172 5172 Glass flange 4007 4007 Wiring harness 10021947 10021947 Silicone tube 1457 1457 Wiring harness 10022112 10022112 Gas valve solenoid 10020838 10020838 Linea 24 & 28...
  • Page 54 Clamp for 60 diam. tube 5916 5916 front panel 5269 5315 Washer clamp 5917 5917 Self tapping screw 5080 5080 Fan to flue connector 10023181 10023183 Wiring harness 1870 1870 6491 6492 Wiring harness 10021236 10020529 Hood assembly 1842 1842 Linea 24 & 28...

  • Page 55: Abling & Disabling Controls

    Jumpers JP1, JP2, JP3, JP4, JP5 and JP7 also exist on the printed circuit board DO NOT under any circumstances add or remove jump- ers at these points. Spare jumpers are available from Vokèra stockists. Part no. 7232. Linea 24 & 28...

  • Page 56: Functional Flow Diagram

    Motorised valve ISO1 Fan triac SP/SE E. Spark/Sense electrode Led ok (green) Solenoid operators Led alarm (red) Burner control board TRF1 Transformer Boiler control board Setting key Secondary thermistor Setting trimmer Natural gas or LPG selector Linea 24 & 28...

  • Page 57: Illustrated Wiring Diagram

    GENERAL LAYOUT & ILLUSTRATED WIRING DIAGRAM Fig. 41 black brown blue black orange white brown brown purple purple white white brown blue brown blue Linea 24 & 28...

  • Page 58: Preliminary Electrical System Checks

    - if the fault also occurs at this stage then there is a house system fault which requires attention by the ELECTRICITY AUTHORITY. The customer should be warned not to use the appliance until this examina- tion has been carried out. Linea 24 & 28...

  • Page 59: Lpg Instructions

    11.6.2 Turn off the main electrical supply. Gain access to the interior as instructed in 5.3.1 - 5.3.2. 11.6.3 Gain access to the electrical terminals as 5.7.2. Ensure the Jumper at point JP8 is removed. Linea 24 & 28...
  • Page 60 An LED on the PCB will flash red to confirm the appliance is in central heating minimum mode. The gas pressure should now be: 6.5 mbar plus or minus 0.65 mbar 5.5 mbar plus or minus 0.55 mbar Linea 24 & 28...
  • Page 61 Linea 24 & 28...
  • Page 62 Linea 24 & 28...
  • Page 63 Linea 24 & 28...
  • Page 64 Vokèra Ltd. Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP Email: enquiries@vokera.co.uk Web: www.vokera.co.uk General Enquiries - Tel: 01442 281400 Fax: 01442 281460 Technical Advice - Tel: 0870 333 0520 Spare Parts - Tel: 0141 945 6820 After Sales Service - Tel: 0870 333 0220 Vokèra Ireland...

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