Fig.1 illustrates the general layout of components. Fig.2 illustrates the operating principles described below. Central Heating Mode When the various switches and controls impose a demand for heat, the pump is started. If the primary pressure is sufficient, the electronic circuitry is energised. The fan is started, the gas valve is energised at an intermediate rate and the electronic ignition goes through an ignition attempt. The burner ignition is checked by the electronic circuitry to ensure correct ignition of the burner; once successful the gas will flow at 75% of maximum heat input for a period of approximately 15 minutes and then go to maximum heat input to maximise heating performance, unless the boiler nears optimum temperature where it will modulate down to suit system load. As water temperature increases this is sensed by the temperature sensor on the primary heat exchanger which modulates the burner to match the heat output to the heat requirement of the system. Depending on the load, either a) The water temperature will continue to rise and the burner will continue to modulate down; The burner will switch off at maximum temperature, or b) the water temperature will fall; the burner will return to a higher output to match demand. Air Intake Flue Outlet 9 25

2.2 2.2.1

2.4 2.4.1

Fig. 2 KEY: A B C D 2

D NOTE: pressure switch. Senses water pressure in the primary circuit and operates the pressure switch (22)
Central Heating Return. Central Heating Flow. Hot Water Outlet. Cold Water Inlet.

SECTION 3

TECHNICAL DATA
Concentric Flue Bend Twin Flue Bend Reduction in flue length for each bend 1000mm 1000mm Reduction in flue length for each bend 1000mm 500mm
Units Dimensions and values are given in the preferred Sl Units with Imperial units in brackets where applicable. Dimensions and Contents
24 Height Width Depth Weight dry Weight full 820mm (32.3) 400mm (15.7 355mm (14.0) 41kg (90lb) 44kg (97lb) 28 820mm (32.3) 450mm (17.7) 355mm (14.0) 43kg (94.6lb) 46kg (101lb)
Water content: 3 litres (.66 gals) for further dimensions see figs 12 - 16 3.3 Connection sizes Heating flow and return: Nut and olive for 22mm o.d. Cold water inlet: Nut and olive for 15mm o.d. Hot water outlet: Nut and tail for 15mm o.d. Gas Service: Nut and tail for 15mm o.d. Safety valve outlet: 15mm comp.or capillary Flue outlet/Air inlet: nom dia 60/100mm specially supplied with boiler (concentric). Flue outlet/Air inlet: nom dia 80/80mm specially supplied with boiler (twin). 3.4 3.4.1 Installation Requirements Clearances (Horizontal or Vertical Flue) Minimum - above casing 225mm (9in) Minimum - below casing 200mm (8in) Minimum - In front 600mm (24in) Minimum - At sides 12mm (in) from casing Maximum heating system contents approx. 76.4 litres (16.8 gals). Acceptance capacity of expansion vessel 8 litres (1.8 gals). Means of filling sealed system: To accord with BS and/or local Water Authority requirements. Using extension tubes the flue may be extended to the following lengths. Concentric Horizontal Vertical 24 4.5m 5.25m 28 3.4m 4.4m

Gas Cock C/H return valve Safety valve outlet

Hot water Outlet

Fig. 7
Showers If a shower control is to be supplied from the combination unit it should be of the type which incorporates a thermostatic control and by design is suitable for use with a combination boiler. Check application with shower manufacturer. 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.

SECTION 5

Fig. 8

INSTALLATION

5.1 Delivery (fig. 8) The appliance is delivered in a heavy duty cardboard carton. Lay the carton on the floor with the writing the correct way up. 5.2 Unpacking (fig. 9) Pull both sides of the top of the carton open. Do not use a knife. Remove the hanging bracket, literature pack and fittings pack, from the packaging. Remove the package supports. Lift the appliance from the carton and lay the appliance down with the white frame on the floor. Remove the protective bag, and the polystyrene support from the back of the appliance. Do not remove the insulation jacket on the domestic heat exchanger.

Fig. 9

The fittings pack contains Wiring harness for optional built in timer 15mm nut & olive Adjustable stopcock Safety valve outlet pipe (1) Filling loop hose (1) Various washers Flue kit supplied in separate carton. 5.3 5.3.1 Preparing for Mounting Push to release front door panel and lower to reveal controls. Loosen the 2 captive screws securing the front control panel to the lower part of the casing and lower to reveal inside of boiler. (fig. 10) Remove two screws at base of casing, slightly lift the casing and slide it gently towards the top of the appliance to disengage the case from the top suspension hooks. (Fig. 11) Ensure the casing and screws are put to one

Fig. 10

Fig. 11

Case Screws

Case screws (one either side)
Mounting the appliance The appliance should be mounted on a smooth, vertical surface, which must be capable of supporting the full weight of the appliance. Care should be exercised when determining the position of the appliance with respect to hidden obstructions such as pipes, cables, etc. When the position of the appliance has been decided using the template supplied carefully mark the position of the fixing jig/mounting bracket assembly (see fig. 7) and flue-hole (if applicable).

Horizontal flue terminals and accessories
Part No. Description Standard telescopic flue Extended telescopic flue Min-Max Length 380mm 600mm (Dimension X) 600mm 920mm (Dimension X) 2359029 Horizontal flue kit For use with add. Bends & extensions 750mm extension 1500mm extension 45 bend (pair) 90 bend Wall bracket (5) 833mm (Dimension X) 750mm 1500mm N/A N/A N/A
Important There are two holes on the template. The lower hole should be used with the telescopic flue kit (part no. 0225705 & 0225710). The upper hole is for use with all other horizontal flue kits. Maximum flue lengths Linea 24 4.5m 5.25m 14m/14m + terminal Linea 28 3.4m 4.4m 14m/14m + terminal

2359049

2359059 0225760
Flue system Concentric Horizontal Concentric Vertical Twin flue 5.5
Fitting the flue The top flue outlet permits both horizontal and vertical flue applications to be considered, alternatively, the Vokera twin flue system can be utilised if longer flue runs are required. Concentric horizontal flue (For concentric vertical flue, see 5.5.2) (For twin flue applications, see 5.5.3) The appliance flue outlet elbow can be rotated through 360 on its vertical axis. In addition the flue may be extended from the outlet elbow in the horizontal plane (see 5.4.2), however if the flue is to be extended or additional bends are to be fitted, the standard horizontal flue kit (part no. 2359029) must be used. A reduction must also be made to the maximum length (see table) when additional bends are used. Reduction for bends
FITTING THE TELESCOPIC FLUE KIT (0225705 & 0225710) Carefully measure the distance from the centre of the appliance flue outlet to the face of the outside wall (dimension X see fig. 12). Add 50mm to dimension X to give the overall flue length (dimension Y). Using the complete telescopic flue assembly adjust the length to suit dimension Y. Once the telescopic flue terminal has been adjusted to the correct length, secure the flue assembly with the screw supplied. NOTE The flue restrictor ring (see fig. 1) must be removed or discarded prior to attaching the flue bend to the appliance. Insert the flue assembly into the previously drilled flue hole and locate the flue bend over the appliance flue outlet. Push the flue bend down over the appliance flue outlet and ensure the correct seal is made. Pull the flue assembly towards and over the flue bend using a twisting action ensuring the correct seal is made. Check that the terminal protrudes past the finished outside wall by the correct length (115mm). NOTE You must ensure that the entire flue system is properly supported and connected.

Bend 45 bend 90 bend

Reduction in maximum flue length for each bend 0.5 metre 1.0 metre
Using the template provided (see 5.4.1), mark and drill a 125mm hole for the passage of the flue pipe. The hole should have a 1 drop from the boiler to outside, to eliminate the possibility of rainwater entering the appliance via the flue. The fixing holes for the wall-mounting bracket & jig should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket & jig has been secured to the wall, mount the appliance onto the bracket. 10 Fig. 12 Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted Linea 24 & 28

FITTING THE STANDARD (2359029) HORIZONTAL FLUE KIT (see 5.4.1) Carefully measure the distance from the centre of the appliance flue outlet to the face of the outside wall (dimension X see fig. 13). Ensure the inner (60mm) pipe is fully inserted into the outer (100mm) pipe (when the inner pipe is fully inserted, it stands proud of the outer pipe by 7.5mm). Add 32mm to dimension X to give the overall flue length (dimension Y). The standard horizontal flue kit (part no. 2359029) is suitable for a distance (dimension Y) of up to 865mm.
EXTENDING THE HORIZONTAL FLUE If the horizontal flue requires extension/s or additional bend/s, the horizontal flue terminal kit (2359029) must be used. Connect the bend supplied with the terminal kit to the top of the boiler using the clips, screws, & gaskets supplied. The additional bends & extensions have an internal push-fit connection, care should be taken to ensure that the correct seal is made when assembling the flue system. Connect the required number of flue extensions or bends (up to the maximum equivalent flue length) to the flue terminal using the clips, screws, & gaskets supplied (see fig. 13 & 13A). IMPORTANT The flue restrictor ring (see fig. 1) must be removed or discarded if the total flue length including bends exceeds 1.0m. NOTE When cutting the horizontal flue terminal or an extension to the required length, you must ensure that the excess is cut from the plain end of the terminal or extension, and that the inner (60mm) pipe is 7.5mm longer than outer (100mm) pipe (see fig. 13 & 13A). Remove any burrs, and check that any seals are located properly. You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted. 5.5.2 Concentric vertical flue The vertical flue terminal can be connected directly to the appliance flue outlet. Alternatively, an extension or bend can be connected to the appliance flue outlet if desired (see 5.4.2), however if additional bends are fitted, a reduction must be made to the maximum flue length (see table below). Reduction for bends
Bend 45 bend 90 bend Reduction in maximum flue length for each bend 0.5 metre 1.0 metre
Fig. 13 NOTE Dimension Y is measured from the end of the terminal to the end of the outer (100mm) pipe. The internal trim should be fitted to the flue pipe before connection of the 90 bend. If the horizontal flue kit (2359029) requires to be cut to the correct size (dimension Y), you must ensure that the inner (60mm) pipe stands proud of the outer (100mm) pipe by 7.5mm (see fig. 13A). Ensure any burrs are filed or removed and that any seals are located properly before assembly. Connect the inner (60mm) pipe of the terminal assembly to the push-fit end of the 90 bend (supplied) using a twisting action. Insert the assembled flue into the previously drilled hole. Using the clips & screws supplied, connect the flue assembly to the boiler, ensuring that the terminal protrudes past the finished outside wall by the correct length (135mm). You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The exterior trim can now be fitted.

Vertical flue terminal and accessories
Part No. Description Vertical flue terminal Pitched roof flashing plate Flat roof flashing plate 750mm extension 1500mm extension 45 bend (pair) 90 bend Wall bracket (5) Length 1.0 metre N/A N/A 750mm 1500mm N/A N/A N/A

Fig. 13A

Using the dimensions given in fig. 14 as a reference, mark and cut a 105mm hole in the ceiling and/or roof. Fit the appropriate flashing plate to the roof and insert the vertical flue terminal through the flashing plate from the outside, ensuring that the collar on the flue terminal fits over the flashing. The fixing holes for the wall-mounting bracket & jig should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount the appliance onto the bracket & jig. IMPORTANT The vertical flue terminal is 1.0 metre in length and cannot be cut; therefore it may be necessary to adjust the height of the appliance to suit or use a suitable extension. Remove or discard the flue restrictor ring from the appliance flue outlet (see fig. 1), if the total flue length including the allowance for any additional bends exceeds 1.0 metre. Connect the vertical flue assembly to the boiler flue spigot using the 60mm & 100mm clips, gaskets, & screws (supplied), ensuring the correct seal is made. The flue support bracket (supplied with the vertical flue kit) can now be fitted. If the vertical flue requires extension/s or additional bend/s, connect the required number of flue extensions or bends (up to the maximum equivalent flue length) between the boiler and vertical flue assembly (see fig. 13A). NOTE When cutting an extension to the required length, you must ensure that the excess is cut from the plain end of the extension and that the inner (60mm) pipe is 7.5mm longer than outer (100mm) pipe (see fig. 13A). Remove any burrs, and check that any seals are located properly. You must ensure that the entire flue system is properly supported and connected.
TWIN FLUE SYSTEM The Vokera twin flue system enables greater flue distances to be achieved (see 5.4.2) than that of the standard concentric flue system. It can be used for horizontal or vertical applications, however the twin flue system must be converted to the dedicated concentric flue kit for termination. It is essential that the installation of the twin flue system be carried out in strict accordance with these instructions. GUIDANCE NOTES ON TWIN FLUE INSTALLATION The flue must have a fall back of 1 back to the appliance to allow any condensate that may form in the flue system to drain via the condensate drain. Consideration must also be given to the fact that there is the possibility of a small amount of condensate dripping from the terminal. Ensure that the entire flue system is adequately supported, use at least one bracket for each extension. The entire flue system must be adequately insulated to maintain heat within the flue system thereby reducing the possibility of condensate production. As the exhaust outlet pipe can reach very high temperatures it must be protected to prevent persons touching the hot surface.

Fig. 18

You must ensure that the entire flue system is properly supported and connected. Ensure that any horizontal sections of pipe have a 1 fall towards the appliance (17mm per 1000mm). The convertor box on the vertical terminal will have to be temporarily removed when inserting the terminal through the flashing. The condensate trap must be primed with water prior to commissioning the boiler. The condensate drain trap must be connected to the drain in accordance with building regulations or other rules in force.

5.6 5.6.1 5.6.2

Connecting the Gas and Water Figs. 6 and 16 show the locations of the fittings. Do not over tighten nuts, use another spanner to apply counter force to avoid damaging the appliance Gas Supply Connecting the gas supply. Connect a 15mm gas pipe to the gas service tap and tighten the union nut securing the tap to the appliance. Pipework from the meter to the appliance must be of adequate size. A minimum gas pressure of 20mb (8 in. w.g.) must be available at the appliance inlet at full flow rate. See section 3. DO NOT use pipes of a smaller size than the appliance inlet connection. 5.7.3 5.7.2
N.B. IT IS ESSENTIAL THAT ALL EXTERNAL CONTROL CIRCUITS AND WIRING IS WIRED FROM THE SAME ELECTRICAL ISOLATOR AS SERVES THE APPLIANCE. Factory fitted internal wiring must not be disturbed when wiring external controls. To gain access to the electrical terminals Remove electrical cover by releasing four securing screws. Fig.19. The mains input terminal block is now easily visible (see fig. 19a). The electricity supply cable from the isolator and the appliance terminal block must be 3 core flexible sized 0.75mm (24 x 0.2mm) to BS6500. Wiring to the appliance should be rated for operation in contact with surfaces up to 90C.

Electrical Cover Screws

Central Heating Connect the central heating pipework (22mm o.d) to the respective valves, right hand: flow, left hand: return, and tighten the nuts. Hot Water Connect a 15mm pipe to the hot water outlet connection of the appliance. Tighten the nut. If the hot water system does not include a tap below the hot water outlet connection, provide a suitable drain tap to permit draining of the appliance hot water side during servicing.
Cold Water Connect a 15mm cold water service pipe to the inlet stopcock of the appliance. Tighten the nut. If the cold water supply is liable to high pressure or large pressure fluctuations, a flow/ pressure regulator should be fitted in the supply pipe. Should the appliance be subject to 'mains knock' it would be advisable to install a non return valve in the hot water outlet pipe to prevent unnecessary activation of the domestic flow switch. Fig. 19

6.14 6.14.1

7.3 7.4

6.14.2 6.14.3 6.15

Hinge up the control fascia and secure using the two screws. (fig.26) Disconnect filling loop, fit filling loop cap. Leave filling loop in a safe and accessible place. Supplementary Instructions for Fitting & Removing Optional Time Clock and for Wiring to External Controls. 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. 25

Fig. 26

SECTION 8

SERVICING INSTRUCTIONS
6. Gain general access as described in 8.4. 7. Remove main burner (see 8.6). Lightly clean with a soft brush and inspect for damage. If during initial inspection any combustion irregularity was suspected, remove injectors and clean or replace (see 8.7). 8. Place cloth below combustion chamber to catch debris. Clean heat exchanger using suitable brushes and rods if necessary. 9. Inspect combustion chamber lining. The insulating material is easily damaged. Do not scrape, but clean off lightly. If any panels are damaged these should be replaced (see 8.11). 10. Replace all parts in reverse order but leave the controls fascia open and outer casing off. 11.Undertake a complete commissioning check as detailed in section 6. 12.Close up control fascia and refix front casing. 13.Clean off casing using soft cloth and dilute detergent. 14.Complete details of service undertaken in the boiler log book. NOTE: there is a flue gas analysis test point incorporated in the flue outlet. (see 8.23.6 and fig. 1, 30) 8.3.2 Replacement of Parts 1. The life of individual components varies and they will need servicing as and when faults develop. The fault finding sequence charts in section 9 will serve to locate which component is the cause of any malfunction. Instructions for removal, inspection and replacement of the individual parts are given in the following pages. 2. The domestic hot water heat exchanger may in certain conditions become partially blocked by scale deposits. Evidence of this will be deterioration in performance. This condition could well be treated using proprietary descalants following makers' instructions without dismantling the appliance by circulating a fluid through the dhw coil. To do this, disconnection from hot and cold services is necessary. Reconnect only after thorough flushing with clean water. 3. Occasional maintenance of mechanical working parts will be necessary. Service kits are available from ypur local Vokra stockists.

8.19.2

8.17.1 8.17.2 8.17.3 8.17.4 8.17.5
Switch OFF mains electricity and gain general access. Disconnect electricity supply and wiring for external controls from the appliance. See 5.7 Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Remove screws on large maintenance clip/s (fig. 14) and remove. Loosen screws on the small clip/s and disconnect flue. Disconnect all pipe unions at the base of the appliance. Lift appliance off upper bracket. Remove two screws retaining vessel securing strap at top. Disconnect expansion pipe at base of expansion vessel and lift vessel out of the appliance. Reassemble in reverse order, using new fibre washers.

8.19.3

8.19.4

8.19.5 8.19.6 8.19.7

8.17.6 8.17.7 8.17.8 8.17.9 8.18 8.18.1 8.18.2

8.19.8

8.18.3 8.18.4 8.18.5 8.18.6 8.19 8.19.1

8.20 8.20.1 8.20.2

Safety Valve Part No. 1806 Refer to figs.34 & 35 Gain general access as 8.4. Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Disconnect safety valve discharge pipe. Loosen grub screw at base of safety valve and pull forwards releasing valve from O' ring seal. Replace in reverse order.
8.21 8.21.1 8.21.2 8.21.3 8.21.4 8.21.5
Removal of Electrical Components Ensure electricity is switched off at main isolator and gain general access as 8.4. Water pressure switch Fig. 1, no. 22 Gain general access as 8.4 Carefully remove the electrical connections to the water pressure switch Extract locking pin and remove the water pressure swutch from the hydraulic manifoldRemove printed circuit board cover by releasing 5 securing screws. Reassemble in reverse order ensuring correct location of electrical connctions. (see fig. 41&43 for electrical conncections)

8.20.3 8.20.4 8.20.5

8.21.6

Domestic Heat Exchanger

Domestic Hot Water Thermistor

Water Flow Regulator

Domestic Hot Water Heat Exchanger Retaining Screws
Diverter Valve and Flow Switch Manifold

Pressure Switch

Safety Valve Diverter Valve Bobbin Diverter Valve Cover

Motorised Valve

Fig.35

8.21.7 8.21.8 8.21.9

Motorised Valve Gain general access as 8.4 Release motorised valve by removing retaining clip.
8.21.32b DOMESTIC HOT WATER Close cold water inlet stopcock. See fig.6 and 6.3.3.4. Open lowest draw-off or drain tap on hot water system. 8.21.33 Remove ignition control box as 8.12 8.21.34 Pull off electrical plug connection from thermistor. 8.21.35 Unscrew thermistor from pocket. 8.21.36 Reassemble in reverse order. 8.22 8.22.1 8.22.2 Pressure Gauge Part No 1857 Gain general access as 8.4 Close heating flow and return valves (fig.6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Trace capillary from back of pressure gauge to connecting point on brass manifold. Unscrew the retaining screw beside the capillary tube entry to the manifold. Pull out capillary tube from manifold. Squeeze plastic locking lugs behind fascia and press gauge from aperture. Reassemble in reverse order following original route for capillary tubes and ensuring locking lugs are located in the grooves.

8.21.10 Remove electrical plug in connector. 8.21.11 Reassemble in reverse order. 8.21.12 Printed Circuit Board Part No. 24&28-10020478 8.21.13 Gain general access as 8.4 8.21.14 Remove printed circuit board cover by releasing 5 securing screws. 8.21.15 Pull out multi plug connectors,one earth lead from the printed circuit board. 8.21.16 Remove 2 screws securing circuit board to front panel and remove board. 8.21.17 Reassemble in reverse order ensuring correct location of electrical connections. (see fig. 41&43 for electrical connections) NOTE: It will also be necessary to check/ adjust the c/h gas pressure as 8.23. 8.21.18 Display Printed Circuit Board 8.21.19 Remove printed circuit board as 8.21.13 to 8.21.18. 8.21.20 Remove three control knobs from front control panel. 8.21.21 Remove the two screws securing the circuit board to the front panel. 8.21.22 Pull out two multi-plug connectors. 8.21.23 Replace in reverse order. 8.21.24 Safety Thermostat Part No 8367 (Refer to fig. 36) 8.21.25 Gain general access as 8.4. 8.21.26 Remove room sealed chamber front cover as 8.5 and R/H side panel (fig. 29). 8.21.27 Pull off the two electrical connections on the back of the thermostat. 8.21.28 Release stat from flow pipe by unscrewing 2 retaining screws. 8.21.29 Reassemble in reverse order ensuring correct location of electrical connections. (see fig. 41&43 for electrical connections) 8.21.30 Thermistor Sensors Part No. 8484 Refer to fig.36 8.21.31 Gain general access as 8.4. 8.21.32 Remove room sealed chamber front cover as 8.5. Remove R/H side panel as fig.29 8.21.32a PRIMARY Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler.
8.22.3 8.22.4 8.22.5 8.22.6 8.22.7

Primary Thermistor

Safety Thermostat

Flow Pipe

Fig. 36
Setting Gas Pressures ALL SETTINGS DONE WITH A SUITABLE MANOMETER CONNECTED TO GAS VALVE AS INSTRUCTED IN 6.6.5 8.23.3
Replace the grey wire back onto the modulator coil together with the protective cover. Setting Minimum Rate (C/H) Turn off the hot water draw off tap. Gain access to the electrical terminal blocks (5.7.2). Fig.19. Identify jumper plug position JP9 on circuit board fig. 38 and fit a temporary jumper tag. Turn the mode selector switch to the position, ensure that the room thermostat and/or timeclock (if fitted) are calling for heat. Turn the heating thermostat to maximum and ensure the appliance ignites. Identify minimum adjustment button on pcb (fig. 38). Press the minimum adjustment button once, the boiler will operate in central heating mode at a minimum gas pressure. An LED on the PCB will flash red to confirm the appliance is in central heating minimum mode. The gas pressure should now be: 24 (N/G) 1.9 mbar. plus or minus 0.19 mbar. 28 (N/G) 1.6 mbar. plus or minus 0.16 mbar. If the reading is incorrect it should be adjusted as follows: Identify the minimum adjustment potentiometer on the PCB fig. 38. With the boiler still in central heating mode and the burner at the minimum rate, using a small screwdriver turn the potentiometer clockwise to increase & anti-clockwise to decrease the minimum gas pressure. When all is adjusted, press the minimum adjustment button once (the appliance will return to normal operation). Turn the appliance off and remove the temporary jumper connected to plug JP9.

Fig. 7 Showing 230v input electrical connection and internal timer without room thermostat. Note: DO NOT remove link between terminals = & TA.

Internal time clock

Fig. 8 Showing 230v input electrical connection internal timer and room thermostat. Note: i) Room thermostat contact rated at 230v. Should the room thermostat require a neutral or earth, connect neutral to one of the terminals marked N, and the earth to the earthing strip. ii) Terminal marked = is a spare terminal used to connect controls. (Remove link between = & TA ) 45
Wiring to External Time Switches and Thermostats.
Earths have been omitted for clarity
(i) General Schematic Diagram. Room Thermostat To ease wiring congestion at the appliance terminal strip, remove the wiring harness normally used for internal clock connection.
Remove Link between = & TA

External Time Switch

Appliance Terminal Block
(ii) ACL Time Switch and Typical Room Thermostat
To ease wiring congestion at the appliance terminal strip, remove the wiring harness normally used for internal clock connection.
ACL Lifestyle LP111 or LP711 Do not link L & 1

LOAD COMMON

Room Thermostat Remove link between = & TA
(iii) Randall Time Switch and Vokera Room Thermostat. Earths have been omitted for clarity To ease wiring congestion at the appliance terminal strip, remove the wiring harness normally used for internal clock connection. Room Thermostat
Randall Time switches 103 103E 103E7 Do not link terminals 3 & 6 in time switch
Remove link between = & TA
MODE SELECTOR SWITCH MUST BE IN THE

POSITION.

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

EXPLODED DIAGRAMS

KEY DESCRIPTION
Film for display Push-push cover Hole cap Protection film O ring Screw Selector knob kit Control knob kit Edge clip Nut Transformer Ignition module Wiring harness Wiring harness Wiring harness 1980 1780
Frame 01005133 Guard 1913 Case 1880 Plastic Trade Mark Label 1781 2A fuse mA fuse 1947 Cover 10021849 Printed Circuit Board 1847 Led Light Guide 1858 Printed Circuit Board 10020477 Instrumental panel 10021951 Door panel 1862 Quick primer pressure gauge 1857 Hole cap 8654 Pin 1867
11 Expansion vessel Flexible pipe Heating distributor manifold Pipe DHW actuator Clip Water supply stop cock Flexible pipe Non return valve Connection Heating cock

10023566

Heating cock Pipe Nipple Water supply stop cock Water supply stop cock Washer Washer Clip Nut Nut Clip 1823 1890
20 Heat exchanger Pipe Pipe Pump Wiring harness Domestic water heat exchanger Connection Non return valve Pipe Hight limit thermostat NTC sensor Pipe Pipe Flow governor Connection Bracket By-pass valve Pump lock key Venting plugs kit

01005137

Pressure switch Heat insulator O ring Automatic air vent bottle O ring Safety valve Motorized valve O ring connection Three way valve cover Fixing fork wrench Seating plate Three way valve overhault kit Spring Screw Washer Washer Washer Wiring harness Wiring harness 10020530 1873
Air box bottom Ambidx air box side NG Burner NP LPG burner NP Spark electrode Air box clip Cover Washer Glass Glass flange Silicone tube Gas valve solenoid

1457 10020838

51 Gas pipe Gas valve Gas pipe Gas cock Washer Washer Nut Clip NG plate Wiring harness Wiring harness 10021947 10022112
Pressure differential switch Silicone tube Brass cap Block with combustion analysis check Fan flue connection Clamp for 60 diam. tube Washer clamp Fan to flue connector Fan Hood assembly

6491 1842

51 Combustion chamber assembly Combustion chamber back panel Combustion chamber lateral panel Combustion chamber front panel Self tapping screw Wiring harness Wiring harness 1870 10020529
ABLING AND DISABLING ELECTRONIC FUNCTIONS
Certain electronic functions on the Linea range of appliances can be abled or disabled according to customer preference. The selections can be made by the addition or removal of jumper tags situated on the printed circuit board. Refer to fig. 40 for jumper positions on printed circuit board. Hot Water Preheat Function: To disable remove jumper JP6 To able add jumper to JP6 C/H Delay Timer: To disable add jumper to JP9 To able remove jumper from JP9 Natural Gas / LPG For Nat gas add jumper to JP8 For LPG remove jumper from JP8 Jumpers JP1, JP2, JP3, JP4, JP5 and JP7 also exist on the printed circuit board DO NOT under any circumstances add or remove jumpers at these points. Spare jumpers are available from Vokra stockists. Part no. 7232.

FUNCTIONAL FLOW DIAGRAM

Fig. 40
Key RT TSH SFS P.S. PDS HL SR SS MOD F P 3W SP/SE E. OPE BCB BEB SB JP8 Room thermostat Heat time switch Domestic hot water flow switch Pressure switch Differential pressure switch Hight limit thermostat Heat thermistor Domestic hot water thermisto Modulator Fan Pump Motorised valve Spark/Sense electrode Solenoid operators Burner control board Boiler control board Secondary thermistor Natural gas or LPG selector JP7 JP9 PT2 PT3 PT1 (SB) DS1-DS2 TA1 F1 F2 RL1 RL2 RL3 ISO1 L1 L2 TRF1 S1 PT1 Room thermostat or remote control jumper Timer on-off selector Central heatingtemperature control Domestic hot water temperature control Selection of 0-reset/winter-summer Temperature/alarm display Combustion analysis selector Fuse 100 mA F (on 24V circuit) Fuse 2 A F (on 230 V circuit) Ignition relay Pump relay 3 way valve Fan triac Led ok (green) Led alarm (red) Transformer Setting key Setting trimmer
NOTE: L-N-E CONNECTION IS ADVISABLE

blue brown

purple

brown brown

orange

brown black

Linea 24 & 28 Fig. 41
grey grey blue blue brown black red brown red
NOTE: L-N-E CONNECTION IS ADVISABLE CONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT IS 230 V.a.c.
GENERAL LAYOUT & ILLUSTRATED WIRING DIAGRAM
white-red white brown blue
GREEN white-light blue white-brown white-purple RED
PRELIMINARY ELECTRICAL SYSTEM CHECKS
A. EARTH CONTINUITY CHECK - appliance must be electrically disconnected - meter set on (ohms) x 1 scale and adjust zero if necessary. a) Test leads from any appliance earth point to earth pin on plug - resistance should be less than 0.1 (ohm). If the resistance is greater than 0.1 (ohm) check all earth wires for continuity and all contacts clean and tight. B. SHORT CIRCUIT CHECK - appliance electrically disconnected, all switches ON (including stats) a) meter set on (ohms) x 1 scale. Test leads from L to N in appliance terminal strip/block - if meter reads 0 then there is a short circuit. b) meter set on (ohms) x 100 scale Repeat test with leads from L to E. If meter reads less than (infinity) there is a fault. NOTE - Should it be found that the fuse has failed but no fault is indicated, a detailed continuity check (i.e. by disconnecting and checking each component) is required to trace the faulty component. It is possible that a fault could occur as a result of local burning/arcing but no fault could be found under test. However, a detailed visual inspection should reveal evidence of burning around the fault. C. POLARITY CHECK Appliance connected to mains supply and meter set on 300V ac scale. Test at appliance terminal strip:a) Test leads from L to N - meter reads approx 230V ac b) Test leads from L to E ( ) - meter reads approx 230V ac c) Test leads from N to E ( ) - meter reads from O-15V ac* Thus the terminal marked L is the live terminal. If the low* V ac reading is given on terminals other than N to E ( ) there is an electrical fault. Repeat the test at the appliance plug/inlet spur to check the wiring system up to the appliance and rectify any fault. If necessary repeat the test at the supply system socket/spur - 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 examination has been carried out. D. RESISTANCE TO EARTH CHECK Appliance must be disconnected from mains supply and meter set on (ohms) x 100 scale. All switches, including stats, ON - Test leads from L to E - if meter reads other than infinity () there is a fault which should be isolated. A detailed continuity check is required to trace the faulty component. IMPORTANT - This series of checks are the first electrical checks to be carried out during a fault finding procedure. On completion of the service/fault finding task which has required the breaking and remaking of electrical connections then the checks - A. Earth Continuity. C. Polarity and D. Resistance to Earth - must be repeated.

SECTION 11

L.P.G. INSTRUCTIONS

11.1 Gas Rates (LPG)

Min. Gas Rate Max. Gas Rate 11.2 Burner Details (LPG) 1.52 litres/h 4.12 litres/h
1.63 litres/h 4.85 litres/h
Main Burner Main Burner Injectors Burner Pressure Max. Rate Burner Pressure Min. C/H Burner Pressure Min. DHW Burner Pressure Soft Light 11.3 RELATED DOCUMENTS BS 6798 BS 5449 BS 5546 BS 5440 BS Polidoro NPx 0.77 36.0 mbar 6.5 mbar 5.1 mbar 16.7 mbar
Polidoro NPx 0.77 36.0 mbar 5.5 mbar 4.3 mbar 16.7 mbar

Part 1

Part 1 Part 1
Boilers of rated input not exceeding 60kW Forced circulation hot water systems Installation of gas hot water supplies for domestic purposes. Flues Domestic Butane & Propane Gas burners in permanent dwellings
GAS SUPPLY A gas supply should be connected to the boiler by a competent L.P.G. installer and should be of sufficient size to supply the boiler at its maximum output. An existing supply should be checked by the installer or L.P.G. supplier to ensure that it can deal with the rate of gas supply required for all the appliances when they are in use at the same time.

11.6.4

Locate the main burner pressure test point (fig. 20) and slacken the screw half a turn in an anti clockwise direction. Attach a suitable pressure gauge as described at 6.6.5. IMPORTANT: Before measuring gas pressures it is imperative that the protective cover over the gas valve adjustment screw is removed. (Fig. 37) Turn on electricity supply. Turn mode selector switch to the position and fully open a domestic hot water tap to operate boiler in dhw mode. Adjust hot water control knob to its maximum setting.

11.5 11.5.1

GAS SUPPLY INSTALLATION Inspect the entire installation including the meter, test for soundness and purge. CHECK BURNER PRESSURE The heat inputs for high and low gas rates are factory set to the maximum values given in section 11.2 but it is necessary to check/ adjust this when commissioning the appliance. Turn off the main electrical supply. Gain access to the interior as instructed in 5.3.1 5.3.2. Gain access to the electrical terminals as 5.7.2. Ensure the Jumper at point JP8 is removed. 11.6.5

11.6 11.6.1

The pressure reading for maximum output should be : 24 36.0mbar. (Plus or minus 3.6mbar) 28 36.0mbar. (Plus or minus 3.6mbar)

Plus AG

Installation & Servicing Instructions
British Gas Service Listed G.C. No. 27 (Linea 24) G.C. No. 28 (Linea 28) G.C. No. 29 (Linea Plus)
THESE INSTRUCTIONS TO BE RETAINED BY USER
CONTENTS Section Subject Section 1 Introduction General Layout

Page no 1 1

Section
Subject Concluding Operations Instructing The User

Page no 31

Section 7 Section 8

Section 2

Design Principles & Operating Sequence 2 Schematic Diagram Central Heating Mode Domestic Hot Water Mode Safety Devices Frost Thermosat Technical Data Dimensions & Contents Connection Sizes Installation Requirements Electrical Details Performance & Limitations Working Pressure (H/W & C/H) Flow Rates Central Heating Pump Duty General Requirements Related Documents Location of Appliance Gas Supply Flue System Air Supply Water Circulation (C/H) Pipework By-Pass System Design Filling Point Electrical Supply Showers

8 Section 9

Section 3

Section 4

Servicing Instructions General Recommended Routine Servicing Replacement Of Parts To Gain General Access To Remove: Room Sealed Chamber Front Cover Main Burner & Electrode Main Burner Injectors Main Heat Exchanger Fan DAPS Combustion Chamber Insulation Panel Ignition PCB Gas Control Valve Pump Domestic Flow Switch Diverter Valve Domestic Heat Exchanger Diverter Valve Main Expansion Vessel Safety Valve Pressure Switch Motorised Valve Printed Circuit Board Display Printed Circuit Board Safety Thermostat Thermistor Sensors Pressure Gauge Setting Gas Pressures Operational Checks & Wiring Sequence of Functions Diagnostic Error Codes Fault Finding Guides

Section 5

Installation 9 Delivery 9 Unpacking 9 Preparing For Mounting 9 Mounting The Appliance 10 Fitting The Flue Horizontal - Vertical Twin 10-11 Connecting Gas & Water Supplies 15 Electrical connections 15 Commissioning Gas Installation Initial Flushing of Pipework Initial Filling of System System Design Pressure 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 20

33 34-43

Section 6
Section 10 Appendix 44 Internal Time Clock Installation 44 External Time Clock Installation 46 S & Y Plan Installations 47 Exploded Diagrams 48-52 Abling & Disabling Controls 53 Functional Flow Diagram 54 Illustrated Wiring Diagram 55 Preliminary Electrical System Checks 56 LPG Instructions 57-58

SECTION 1

INTRODUCTION
The appliance is designed for use with a sealed heating system only and is not intended for use on an open vented system. The provision of stored domestic hot water is possible by the addition of an indirect cylinder with 'S' or 'Y' plan controls. An automatic range-rating facility is incorporated in the boiler for the central heating system in conjunction with the electronic burner modulation. The domestic hot water (dhw) service utilises a motorised control combined with a 3 port diverter valve to give hot water priority which also benefits from a preheat function.
The Vokra Linea Plus is a combined central heating and domestic hot water appliance. By design it incorporates full sequence electronic ignition, circulating pump, expansion vessel, safety valve, temperature gauge, pressure gauge and 3 port diverter valve. The Plus also benefits from an air/gas modulation system and has low NOx emissions. The boiler is produced as a room sealed appliance suitable for wall mounting applications only. It is provided with a fan powered flue outlet with an annular co-axial combustion air intake which can be rotated through 360 degrees. A vertical & twin flue option is available.

4.6.1 4.6.2

By-Pass An automatic by-pass is incorporated in the boiler, but systems should be designed to ensure that with all radiators turned off a flow rate of at least 350 litres/hour (1.28 gals/min) is achieved through the system. See 6.9.4. System Design Figs 5 & 5a illustrates typical system layouts showing options of either, pipe connection from below as fig. 5, or pipe connection from above utilising the purpose made duct in the rear frame of the appliance. Draining Taps These must be located in accessible positions to permit the draining of the whole system. The taps must be at least 15mm nominal size and manufactured in accordance with BS 2879: 1980.
Terminal position for fan assisted boiler (minimum distance) mm A - Directly below an open window or other 300 opening (e.g. air brick) B - Below gutters, soil pipes or drain pipes 25 C - Below eaves 25 D - Below balconies or car port roof 25 E - From vertical drain pipes and soil pipes 75 F - From internal or external corners 25 G - Above ground or below balcony level 300 H - From a surface facing a terminal 600 I - From a terminal facing a terminal 1200 J - From an opening in the car port (e.g. door window) into dwelling. 1200 K - Vertically from a terminal on the same wall 1500 L - Horizontally from a terminal on the same wall 300 M - Horizontally from a vertical terminal to a wall 300 N - Horizontally from an opening, airbrick, openable window, etc. 300
NOTE: The flue must be terminated in a place not likely to cause a nuisance. 4.5 Air Supply The following notes are intended for general guidance. The room sealed fan flued boiler does not require a permanent air vent for combustion air supply. Where installed in a cupboard or compartment ventilation is not required.

Fig. 5

Fig. 5a
N.B. Vokra Ltd recommend a 2-pipe system. Single pipe systems are more liable to be troublesome unless carefullly designed and installed. Linea Plus AG 7
Air Release Points These must be fitted at all high points where air will naturally collect, and must be sited to facilitate complete filling of the system. The appliance has an integral sealed expansion vessel to accommodate the increase of water volume when the system is heated. It can accept up to 10 litres of expansion water. If the appliance is connected to a system with an unusually high water content. Calculate the total expansion and add additional sealed expansion capacity as appropriate. In general, modern systems will present no problem.
Filling Point A method for filling the system and replacing water lost during servicing is provided on the appliance. This method complies with the Water Supply (Water Fittings) Regulations 1999.

Bend 45 bend 90 bend Reduction in maximum flue length for each bend 0.5 metre 1.0 metre
Using the template provided (see 5.4.1), mark and drill a 125mm hole for the passage of the flue pipe. The hole should have a 1 drop from the boiler to outside, to eliminate the possibility of rainwater entering the appliance via the flue. The fixing holes for the wall-mounting bracket & jig should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket & jig has been secured to the wall, mount the appliance onto the bracket. 10 Fig. 12 Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted.
FITTING THE STANDARD (2359029) HORIZONTAL FLUE KIT (see 5.4.1) Carefully measure the distance from the centre of the appliance flue outlet to the face of the outside wall (dimension X see fig. 13). Ensure the inner (60mm) pipe is fully inserted into the outer (100mm) pipe (when the inner pipe is fully inserted, it stands proud of the outer pipe by 7.5mm). Add 32mm to dimension X to give the overall flue lenghth (dimension 'Y')standard horizontal flue kit (part no. 2359029) is suitable for a distance (dimension Y) of up to 865mm.
EXTENDING THE HORIZONTAL FLUE If the horizontal flue requires extension/s or additional bend/s, the horizontal flue terminal kit (2359029) must be used. Connect the bend supplied with the terminal kit to the top of the boiler using the clips, screws, & gaskets supplied. The additional bends & extensions have an internal push-fit connection, care should be taken to ensure that the correct seal is made when assembling the flue system. Connect the required number of flue extensions or bends (up to the maximum equivalent flue length) to the flue terminal using the clips, screws, & gaskets supplied (see fig. 13 & 13A). NOTE When cutting the horizontal flue terminal or an extension to the required length, you must ensure that the excess is cut from the plain end of the terminal or extension, and that the inner (60mm) pipe is 7.5mm longer than outer (100mm) pipe (see fig. 13 & 13A). Remove any burrs, and check that any seals are located properly. You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted. 5.5.2 CONCENTRIC VERTICAL FLUE The vertical flue terminal can be connected directly to the appliance flue outlet. Alternatively, an extension or bend can be connected to the appliance flue outlet if desired (see 5.4.2), however if additional bends are fitted, a reduction must be made to the maximum flue length (see table below).

TWIN FLUE SYSTEM The Vokera twin flue system enables greater flue distances to be achieved (see 5.4.2) than that of the standard concentric flue system. It can be used for horizontal or vertical applications, however the twin flue system must be converted to the dedicated concentric flue kit for termination. It is essential that the installation of the twin flue system be carried out in strict accordance with these instructions. GUIDANCE NOTES ON TWIN FLUE INSTALLATION The flue must have a fall back of 1 back to the appliance to allow any condensate that may form in the flue system to drain via the condensate drain. Consideration must also be given to the fact that there is the possibility of a small amount of condensate dripping from the terminal. Ensure that the entire flue system is adequately supported, use at least one bracket for each extension. The entire flue system must be adequately insulated to maintain heat within the flue system thereby reducing the possibility of condensate production. As the exhaust outlet pipe can reach very high temperatures it must be protected to prevent persons touching the hot surface.

Reduction for bend

Bend 45 bend 90 bend Reduction in maximum flue length for each bend 1.0 metre 1.0 metre

Twin flue accessories

Part No. Description Horizontal flue terminal Vertical flue terminal Twin adapter kit Pitched roof flashing plate Flat roof flashing plate Condensate drain kit 0.25m extension (pair) 0.5m extension (pair) 1.0m extension (pair) 2.0m extension (pair) 45 bend (pair) 90 bend (pair) Twin bracket (5) Single bracket (5) Length 1.0 metre 1.0 metre N/A N/A N/A N/A 250mm 500mm 1000mm 2000mm N/A N/A N/A N/A

Fig. Linea Plus AG

Mounting the boiler The fixing holes for the wall-mounting bracket & jig should now be drilled and plugged, an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount the appliance onto the bracket & jig. 5.5.3.1 Installation of twin adaptor kit (fig. 15)
The condensate drain kit must be fitted within 1 metre of the appliance flue outlet. It is recommended that the condensate drain kit should be fitted in the vertical plane, however it can be fitted horizontally with care. Fit the first bend to the condensate drain kit or exhaust connection manifold by firmly pushing in to position. Using the two holes in the exhaust connection manifold as a guide, drill a 3mm hole in each and secure using the screws provided. Connect the air inlet pipe to the air baffle as above. The twin flue pipes extensions and accessories can now be installed by pushing together (the plain end of each extension or bend should be pushed approximately 50mm into the female socket of the previous piece). The condensate drain trap must be connected to the drain in accordance with Building Regulations or other rules in force

Fig. 15 Remove or discard the flue restrictor ring from the appliance flue outlet (see fig. 1). Insert the small restrictor ring (supplied with the twin adapter kit) if the total flue length including the allowance for any bends is less than 8 metres. Insert the exhaust connection manifold onto the appliance flue outlet. Place the silicone seal (supplied with twin adapter kit) over the rim of the exhaust connection manifold. Remove one of the blanking plates (located to the left & right of the appliance flu Remove one of the blanking plates (located to the left & right of the appliance flue outlet) and using the same screws install the air baffle. 5.5.3.2 Installation of condensate drain kit (fig. 16)

5.5.3.3

Horizontal termination ( fig. 17) The twin flue system must be converted to the dedicated concentric flue kit for termination. The horizontal terminal is supplied with a built-in converter box and cannot be shortened.
Fig. 17 A 130mm hole is required for the passage of the concentric terminal through the wall. Depending on site conditions it may be preferable to install the terminal assembly prior to fitting the twin flue pipes. Mark and drill a 130mm hole for the passage of the horizontal flue terminal, ensuring that there is a 1 fall back to the boiler (17mm per 1000mm). Insert the terminal assembly into the flue hole. Push-fit the twin flue pipes onto the concentric to twin converter ensuring that the exhaust pipe connects to the exhaust connection on the concentric to twin converter. If necessary cut the plain ends (male) of the twin flue pipes to allow connection to the concentric to twin converter. 13

Fig. 16

NOTE Before cutting twin flue pipes ensure allowances have been made for connection onto the previous piece and onto the concentric to twin converter. The last twin flue pipes must be pushed 50mm onto the male spigots of the concentric to twin converter. NOTE You must ensure that the entire flue system is properly supported and connected. When cutting an extension to the required length, you should ensure that the excess is cut from the plain end of the extension. Remove any burrs, and check that both seals are located properly. Seal the flue terminal assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted. 5.5.3.4 Vertical termination (See fig. 18) The twin flue system must be converted to the dedicated concentric flue kit for termination. The vertical terminal is supplied with a builtin converter box and cannot be shortened. A 130mm hole is required for the passage of the concentric terminal through the ceiling and/or roof. Depending on site conditions it may be preferable to install the terminal assembly prior to fitting the twin flue pipes. Fit the appropriate flashing plate to the roof and insert the vertical flue terminal through the flashing plate from the outside, ensuring that the collar on the flue terminal fits over the flashing. Push-fit the twin flue pipes onto the concentric to twin converter ensuring that the exhaust pipe connects to the exhaust connection on the concentric to twin converter. If necessary cut the plain ends (male) of the twin flue pipes to allow connection to the concentric to twin converter. NOTE Before cutting twin flue pipes ensure allowances have been made for connection onto the previous piece and onto the concentric to twin converter. The last twin flue pipes must be pushed 50mm onto the male spigots of the concentric to twin converter. 14 Linea Plus AG

Normal Operating Position
Closed Position Filling Position

Fig. 20

Do not connect wires to this terminal strip

Fig. 21

Controls terminal strip

SECTION 6

COMMISSIONING
6.3.3 Initial flushing of Pipework The whole of the heating system must be flushed both cold and later hot as detailed in 6.10. Open all radiator or heating valves and the appliance central heating valves. Drain the boiler and system from the lowest points. Open the drain valve full bore to remove any installation debris from the boiler prior to lighting. Refill the boiler and heating system as described in 6.3.2 6.3.4 6.3.4.1 6.3.4.2 Setting the System Design Pressure The design pressure should be a minimum of 1 bar and maximum 1.5 bar. The actual reading should ideally be 1 bar plus the equivalent height in metres to the highest point of the system above the base of the appliance. (Up to the maximum of 1.5 bar total). N.B. The safety valve is set to lift at 3bar/ 30m/ 45psig. 6.3.4.3 To lower the system pressure to the required value, pull lever on head of safety valve (14) a quarter turn to release water until the required figure registers on the gauge (31). Filling the Hot Water System Close all hot water draw-off taps. Turn filling/inlet valve to the normal operating position (vertically up). See fig. 20 Slowly open each draw-off until clear water is discharged. Checking Electricity Supply Carry out preliminary checks for continuity, polarity, and resistance to earth (see page 61), gaining access as required according to 5.7.2 in this manual. Leave the appliance with the control fascia closed and with the mains electricity switched OFF Lighting the Boiler Ensure flow and return valves are open. (6.3.2.1) If external and/or internal controls are fitted (e.g Timeclock and/or Room thermostat) ensure they call for heat. The commissioning of the appliance may be easier if the external/ internal controls are disconnected and terminals TA & TA are linked. (For access procedure turn off electricity and refer to 5.7.2 for instructions). 6.5.2 6.5.3 6.5.4 Switch on the mains electricity and turn the on / off / mode switch (25) to Set the c/h control knob (28) to the highest setting. The appliance will go through an ignition sequence and the burner will light.
Where the text bears identifying numbers in brackets, refer to figs. 1 and 2 unless otherwise instructed. Gas Supply Installation Inspect the entire installation including the meter. Test for soundness and purge, all as described in BS6891:1988. Central Heating Systems IMPORTANT DO NOT RELEASE AIR FROM THE RED SEALED EXPANSION TANK. It is charged with air at the factory from.75 -.80 bar (11 - 12psig) Initial filling of the System See 3.4.3. Open central heating flow and return valves. Unscrew black cap on automatic air release valve (18) one full turn. (Leave open permanently). Close all air release taps on the central heating system. Identify the filling/inlet valve found at the base of the appliance. See fig.6. The filling loop may have been disconnected from the filling/inlet valve and heating flow valve. If so reconnect unscrewing the caps as necessary. The filling/inlet valve has 3 positions. (Fig. 20) i) Vertically up - normal operating position. ii) Turn to the left to horizontal - closed position. iii) Vertically down - Filling position. To fill, slowly turn the handle of the filling/inlet valve from the closed position towards the filling position. Mains water will be heard to enter the system/boiler. As the water enters the system/boiler the pressure gauge will be seen to rise. Pressurise to between 1bar & 1.5bar when the system is cold. DO NOT OVERPRESSURISE. Once the desired pressure is achieved turn the filling/inlet valve back to the closed position. Starting with the lowest radiator open each air release tap in turn closing it only when clear water, free of bubbles, flows out. In the same way release air from any high points in the pipework. Continue filling the system until at least 1.0 bar registers on the gauge then turn the handle of the filling/inlet valve back to the closed position. Inspect the system for water soundness and remedy any leaks discovered.

Complete details of the boiler, controls, installation and commissioning in the log book supplied with the boiler. This is an important document which must be correctly completed and handed to the user. Failure to install and commission this appliance to the manufacturers instructions may invalidate the warranty.
SECTION 7 INSTRUCTING THE USER
7.1 Hand over the copy of the Users Instructions and boiler log book supplied with the appliance, together with these instructions. Explain how to operate the boiler correctly and how to use the timeclock and room thermostat if fitted. Show the user how to switch off the appliance and indicate the position of the electric supply isolator. Inform the user of the location of all drain cocks and air vents. Explain how to turn the appliance off for both short and long periods and advise on the precautions necessary to prevent damage should the appliance be inoperative when freezing conditions may occur. Show the user the filling loop position its function and how to repressurise the system using the filling/inlet valve. Advise the user that, for continued safe and efficient operation, the appliance must be serviced by a competent person at least once a year.

6.14 6.14.1

7.3 7.4

6.14.2 6.14.3 6.15

Hinge up the control fascia and secure using the two screws (fig.25). Disconnect filling loop, fit filling loop cap. Leave filling loop in a safe and accessible place. Supplementary Instructions for Fitting & Removing Optional Time Clock and for Wiring to External Controls. 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. 24 Fig. 25

Case screws (one either side) 20

SECTION 8

SERVICING INSTRUCTIONS
6. Gain general access as described in 8.4. 7. Remove main burner (see 8.6). Lightly clean with a soft brush and inspect for damage. If during initial inspection any combustion irregularity was suspected, remove injectors and clean or replace (see 8.7). 8. Place cloth below combustion chamber to catch debris. Clean heat exchanger using suitable brushes and rods if necessary. 9. Inspect combustion chamber lining. The insulating material is easily damaged. Do not scrape, but clean off lightly. If any panels are damaged these should be replaced (see 8.11). 10. Replace all parts in reverse order but leave the controls fascia open and outer casing off. 11. Undertake a complete commissioning check as detailed in section 6. 12. Close up control fascia and refix front casing. 13. Clean off casing using soft cloth and dilute detergent. 14. Complete details of service undertaken in the boiler log book. NOTE: there is a flue gas analysis test point incorporated in the flue outlet (fig. 1, 23). 8.3.2 Replacement of Parts 1. The life of individual components varies and they will need servicing as and when faults develop. The fault finding sequence charts in section 9 will serve to locate which component is the cause of any malfunction. Instructions for removal, inspection and replacement of the individual parts are given in the following pages. 2. The domestic hot water heat exchanger may in certain conditions become partially blocked by scale deposits. Evidence of this will be deterioration in performance. This condition could well be treated using proprietary descalants following makers' instructions without dismantling the appliance by circulating a fluid through the dhw coil. To do this, disconnection from hot and cold services is necessary. Reconnect only after thorough flushing with clean water. 3. Occasional maintenance of mechanical working parts will be necessary (three port valve, flow diaphragm). Service kits are available from your local Vokra stockists. Vokra Service Kit No.T0019.

Fig. 26 Flue gas analysis test point

8.5 8.5.1 8.5.2

Fig. 27 a

Fig. 27 b 22

Fig. 28 a Linea Plus AG
Main Burner and Electrodes Main Burner Part No 0511 N.G. 0512 L.P.G Spark/Sense Electrode Part No 1838 Refer to figs 28a - 28c.

8.8.8 8.8.9

Unscrew unions on either side of main heat exchanger fig. 29a&b. Slide out main heat exchanger, taking care not to damage insulation panels. Avoid spillage of water on boiler electrics. Reassemble in reverse order using new fibre washers in unions.

8.6.1 8.6.2 8.6.3 8.6.4

Gain general access as 8.4. Remove room sealed front cover as 8.5 Remove front of combustion chamber by releasing screws (fig. 27a&b). Remove four burner retaining screws (fig. 29a&b). Ease burner forward and rest on chamber base (fig. 28a&b). Release electrode retaining screws & carefully remove electrode(s). Trace electrode and earth lead to electronic ignition control and gas valve and disconnect Trace electrode leads, 1 to pcb and 2 to electronic ignition unit and disconnect. 8.8.10

8.6.5 8.6.6

8.6.7 8.6.8
Remove main burner. Reassemble in reverse order ensuring correct location of electrode(s). Note1. If the Ionisation electrode is replaced the gas pressures will need resetting as instructed in 8.23. Note 2: If difficulty is found in relocating the burner securing screws, easier access can be gained by removing the two side panels (fig. 28a&b). Note 3: See page 36 for electrode positioning.

Fig. 28b

8.7 8.7.1 8.7.2 8.7.3 8.7.4 8.8
Main Burner Injectors Gain general access as 8.4. Remove room sealed front cover plate and combustion chamber front (8.5 & 8.6.3). Remove main burner (8.6.4 to 8.6.8). Unscrew injector(s) from burner bar. Main Heat Exchanger 0513 Refer to fig. 29 Gain general access as 8.4. Remove room sealed front cover plate (8.5). Remove front of combustion chamber (8.6.3). Remove two air baffle plates, 1 screw securing each (fig. 30). Remove both side panels, 2 screws each (fig. 28a&b). Close heating flow and return valves by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Place cloth under heat exchanger to catch surplus water. Fig. 28c

8.8.1 8.8.2 8.8.3 8.8.4 8.8.5 8.8.6

Fig. 29a

8.9 8.9.1 8.9.2 8.9.3 8.9.4
Flue Fan Part No. 2076. Remove room sealed front cover plate (8.5) and front of combustion chamber (8.6.3). Loosen maintenance clip securing screws (see fig. 30) and slide upwards to clear joint. Remove silicone pipes from nozzles on inner flue bend. Remove 5 flue hood retaining screws (see fig. 30). NOTE: when removing the two side screws the two air baffle plates can be removed.

8.9.5 8.9.6

Carefully slide flue hood forward disconnecting electrical leads on fan in the process. Unscrew 4 screws securing fan to flue hood and remove fan. Transfer aluminium manifold (two screws) to new fan. Reassemble in reverse order, replacing centre hood screw first. Differential Analog Pressure Switch Part No. 2677 Refer to Fig. 30 Gain general access as 8.4. Remove room sealed cover (8.5). Remove 2 screws holding pressure differential switch to the combustion chamber. Pull off tab connectors and remove pressure switch, disconnecting the air pressure pipes in the process. Reassemble in reverse order. See fig. 39&40 for correct fitting of electrical connections. When reconnecting the pressure pipes the upper nozzle on the inner flue bend connects to the upper nozzle of the pressure differential switch. Maintenance clip Pressure differential switch Fig. 29b

8.9.7 8.10

8.10.1 8.10.2 8.10.3 8.10.4

8.10.5

Air tubes

8.11 8.11.1 8.11.2

Combustion Chamber Insulation Boards Gain general access as 8.4. Remove room sealed front cover 8.5. Remove front of combustion chamber 8.6.3. Remove Main Heat Exchanger 8.8. To remove side combustion chamber insulation boards, gently prise upwards and pull out. To remove rear board, gently prise upwards and pull out. Fourth panel (front) is replaced complete with combustion chamber front panel. Hood Retaining Screws Air baffle plate

8.11.3 8.11.4 8.11.5

Fig. 30
8.12 8.12.1 8.12.2 8.12.3 8.12.4 8.12.5
Ignition PCB Gain general access as 8.4. Remove PCB cover. Disconnect wires from ignition PCB. Remove ignition PCB. Replace in the reverse order ensuring wires are replaced correctly.
8.13 8.13.1 8.13.2 8.13.3 8.13.4 8.13.5 8.13.6 8.13.7 8.13.8 8.13.9
Gas Control Valve (complete) Part No. 2471 fig. 31. Turn off gas service tap. Remove Ignition control box as 8.12. Pull off silicone tube from gas valve regulator. Disconnect earth leads from gas valve. Disconnect wires from modulator coil. Unscrew gas service tap union & release from its seating. Remove 2 screws securing gas valve bracket to the base frame. Undo union above the gas control valve & withdraw gas valve. Transfer gas connecting pipes to the new valve using new gasket.
8.13.10 Reassemble in reverse order. 8.13.11 Test all joints for gas soundness. 8.13.12 Check burner pressures. As detailed in 6.6.

8.19.5 8.19.6 8.19.7
8.17.6 8.17.7 8.17.8 8.17.9 8.18 8.18.1 8.18.2

8.19.8

8.18.3 8.18.4 8.18.5 8.18.6 8.19 8.19.1

8.19.2

Switch OFF mains electricity and gain general access. Disconnect electricity supply and wiring for external controls from the appliance.

8.20 8.20.1 8.20.2

Safety Valve Part No. 1806 Refer to figs.33 & 34. Gain general access as 8.4. Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Disconnect safety valve discharge pipe. Loosen grub screw at base of safety valve and pull forwards releasing valve from O' ring seal. Replace in reverse order.
8.21 8.21.1 8.21.2 8.21.3 8.21.4 8.21.5 8.21.6 8.21.7
Removal of Electrical Components Ensure electricity is switched off at main isolator and gain general access as 8.4. Pressure Microswitch Fig. 1, no. 15. Gain general access as 8.4. Release microswitch from hydraulic group by removing one securing screw. Remove plastic cover. Remove electrical wires. Reassemble in reverse order ensuring correct location of electrical connections. (See fig. 39&40 for electrical connections).

8.20.3 8.20.4 8.20.5

Domestic Hot Water Thermistor

Water Flow Regulator

Domestic Hot Water Heat Exchanger Retaining Screws
Diverter Valve and Flow Switch Manifold

Pressure Switch

Safety Valve Diverter Valve Bobbin Diverter Valve Cover

Fig. 34

Motorised Valve

8.21.8 8.21.9

Diverter Valve Gain general access as 8.4.
Open lowest draw-off or drain tap on hot water system. 8.21.34 Remove ignition control box as 8.12. 8.21.35 Pull off electrical plug connection from thermistor. 8.21.36 Unscrew thermistor from pocket. 8.21.37 Reassemble in reverse order. 8.22 8.22.1 8.22.2 Pressure Gauge Part No 1857. Gain general access as 8.4. Close heating flow and return valves (fig.6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. Trace capillary from back of pressure gauge to connecting point on brass manifold. Unscrew the retaining screw beside the capillary tube entry to the manifold. Pull out capillary tube from manifold. Squeeze plastic locking lugs behind fascia and press gauge from aperture. Reassemble in reverse order following original route for capillary tubes and ensuring locking lugs are located in the grooves.
8.21.10 Release motorised valve by removing retaining clip. 8.21.11 Remove electrical plug in connector. 8.21.12 Reassemble in reverse order. 8.21.13 Printed Circuit Board Part No. 05022. 8.21.14 Gain general access as 8.4. 8.21.15 Remove printed circuit board cover by releasing 5 securing screws. 8.21.16 Pull out multi plug connectors,one earth lead and one electrode lead from the printed circuit board. 8.21.17 Remove 2 screws securing circuit board to front panel and remove board. 8.21.18 Reassemble in reverse order ensuring correct location of electrical connections. (See fig. 39&40 for electrical connections). NOTE: it will also be necessary to check/ adjust the c/h gas pressure as 8.23. 8.21.19 Display Printed Circuit Board 8.21.20 Remove printed circuit board as 8.21.13 to 8.21.18. 8.21.21 Remove three control knobs from front control panel. 8.21.22 Remove the two screws securing the circuit board to the front panel. 8.21.23 Pull out two multi-plug connectors. 8.21.24 Replace in reverse order. 8.21.25 Safety Thermostat Part No 8367 Refer to fig. 35. 8.21.26 Gain general access as 8.4. 8.21.27 Remove room sealed chamber front cover as 8.5 and R/H side panel (fig. 28a&b). 8.21.28 Pull off the two electrical connections on the back of the thermostat. 8.21.29 Release stat from flow pipe by unscrewing 2 retaining screws. 8.21.30 Reassemble in reverse order ensuring correct location of electrical connections. (See fig. 39&40 for electrical connections). 8.21.31 Thermistor Sensors Part No. 8484 Refer to fig.35. 8.21.32 Gain general access as 8.4. 8.21.33 Remove room sealed chamber front cover as 8.5. Remove R/H side panel as fig.28a&b. 8.21.33a PRIMARY Close heating flow and return valves (fig. 6) by turning 1/4 turn until indicating lines are horizontal. Pull lever on head of safety valve to drain primary circuit to boiler. 8.21.33b DOMESTIC HOT WATER Close cold water inlet stopcock. See fig.6 and 6.3.2.4. Linea Plus AG

8.22.3 8.22.4 8.22.5 8.22.6 8.22.7

Fig. 35

Primary Thermistor

Safety Thermostat

Flow Pipe
Setting Gas Pressures ALL SETTINGS DONE WITH A SUITABLE MANOMETER CONNECTED TO GAS VALVE AS INSTRUCTED IN 6.6.5.

8.23.1

Setting Maximum Rate Turn off electrical supply to boiler and follow instructions in section 8.4 to gain access. Refer to fig. 22 & 36. Turn on the electricity supply and the appliance mode selector switch to remove gas pressure adjustment protective cover (fig. 36). Turn on fully a domestic draw off tap. The boiler will now light at full flame. Screw the outer nut (a) on the end of the modulator coil slowly clockwise until the burner lights. Adjust the nut until the correct pressure is obtained on the gauge. The correct reading should be: 10.1 mbar plus or minus 1.0 mbar

8.23.2

Setting Minimum Rate Remove one of the grey wires connecting to the modulator coil. The gas pressure will now be at the minimum rate. Turn the inner minimum adjusting screw (b) anti clockwise to decrease the pressure, or clockwise to increase the pressure until the minimum gas pressure is achieved, (ensure when adjusting the inner screw the outer nut (a) is held in position) the correct reading should be: 1.1 mbar plus or minus 0.11 mbar Replace the grey wire back onto the modulator coil together with the protective cover.
Gas pressure adjustment protective cover

Fig. 36

Maximum pressure adjustment screw (a)
Minimum pressure adjustment screw (b)
Soft Light Ignition The Linea range incorporates a fully automatic soft light ignition sequence which is non adjustable. When ignition is called for the gas valve is energised and at the same time 20 m/A is applied to the modulator coil for a period of approximately 3 seconds. During this 3 seconds the appliance will ignite. After the initial 3 seconds power to the modulator coil is gradually increased to a maximum power of 140 m/A. 140 m/A is applied to the modulator coil for a further second. If the appliance is operating in hot water mode the maximum heat input will be automatically adjusted depending on the temperature of the appliance. If the appliance is operating in central heating mode see 8.24.1.
8.24.2.1 To use the combustion switch it is important that the gas pressures are set accurately as described in 8.23.1- 8.23.3. 8.24.2.2 Remove combustion switch cap on front control panel by turning 1/4 turn to disengage. Fig.1, 29 8.24.2.3 Unscrew flue gas analysis test point fig.1, 23. Set up flue gas analyser and insert probe into test point. 8.24.2.4 Using a screwdriver lightly press the black toggle behind the combustion switch cap once only. The appliance will light at maximum rate. At this point the digital display will show CO to confirm the appliance is in combustion test mode. 8.24.2.5 Analyse flue gasses on analyser. 8.24.2.6 Once the analysis is complete lightly press the black toggle once to disengage the combustion mode. The display will revert to showing appliance temperature on the digital display. NOTE: the combustion switch can also be used when gas rating the appliance. 8.25 End of Servicing Run through the general commissioning as described in Section 6 as far as they apply. Refit casing and clean up.

CHECK WIRING AND CONNECTIONS GREEN LED LIGHT NO
IS THERE 24 Vdc BETWEEN TERMINALS M5.3 AND M3.5 ON PCB
NO CHECK COMBUSTION AND CHECK &/OR REPLACE BURNER THERMISTOR AND WIRING

YES RESTART THE TEST

CHECK WIRING AND CONNECTIONS, HIGH LIMIT THERMOSTAT OR PCB
5 Vdc BETWEEN TERMINALS M2.1 & M2.2 ON DISPLAY BOARD

IS RED LED FLASHING

NO FAULT CODE SHOWING
5 Vdc BETWEEN TERMINALS M9.1 & M9.2 ON CONTROL BOARD

REPLACE DIGITS BOARD

YES CHECK AND/OR REPLACE WIRING OR CONNECTIONS WITH DISPLAY BOARD

LED ASSEMBLY OK

BICOULORED
MAINS PRESENT BETWEEN M16.L & M16.N ON CONTROL BOARD
REPLACE THE BICOULORED LED ASSEMBLY
NO CHECK FUSES F1 AND F2 ON CONNECTION BOARD
REPLACE THE DIGITS BOARD FAULT CODE 01 SHOWING
RECHECK SUPPLY FUSE & CONNECTORS TO BOILER TERMINALS
YES SWITCH ON/OFF SELECTOR TO OFF POSITION YES FUSE OK
REPLACE CONTROL BOARD FAULT CODE 02 SHOWING YES SWITCH MODE SELECTOR TO DHW POSITION

REPLACE FUSE

RESTART THE HIGH LIMIT STAT RESTART THE TEST GREEN LED LIGHT YES GREEN LED LIGHT YES IGNITION CONTROL OK NO YES
CHECK WIRING AND CONNECTIONS ,HIGH LIMIT THERMOST. AND CONTROL BOARD

RESTART THE TEST

REPLACE IGNITION CONTROL
VOKERA LINEA PLUS AG Rev. 1 08/03/2000 TEST B : CHECK CONTROL IN DHW MODE
TURN MODE SELECTOR SWITCH TO DHW. DHW STA AT MAX. T

TURN ON TAP

DOES BURNER LIGHT YES
IS THERE A VOL TAGE >4 Vdc BETWEEN TERMINALS M3.10 & M3.11 ON PCB
CHECK BOILER STARTUP: TEST A

IS FAN ON?

NO CHECK FAN, WIRING AND CONNECTIONS, DIFFERENTIAL ANALOG PRESSURE SWITCH AND CONTROL BOARD
IS D.A.P.S. OK? YES TURN DHW THERMOSTAT AT MIN.

CHECK FLUE VENTURI TUBE

REPLACE DIFFERENTIAL ANALOG PRESSURE SWITCH
DO BURNER AND FAN SWITCH OFF
WAIT WATER FLOW TEMPERATURE >40 C
YES TURN DHW THERMOSTAT AT MAX.
IS WATER FLOW TEMPERATURE >40 C
VOKERA LINEA PLUS AG Rev. 1 08/03/2000
SWITCH ON BOILER AND SELECT MODE TO WINTER C/H THERMOSTAT A T MAX.
TEST C: CHECK CONTROL IN C/H MODE
MAKE A LINK BETWEEN PIN M16.TA AND M16.TA ON CONTROL BOARD
YES DOES BURNER LIGHT NO CHECK BOILER STARTUP TEST A
IS THE 3 WA VALVE Y ON CH POSITION?
YES CHECK &/OR REPLACE 3 WAY VALVE
MAINS PRESENT BETWEEN M11.1 & M11.2 ON CONTROL BOARD

NO REPLACE CONTROL BOARD

NO IS FAN ON?
NO CHECK FAN, WIRING AND CONNECTIONS, DIFFERENTIAL ANALOG PRESSURE SWITCH AND CONTROL BOARD NO

11.6 11.6.1

11.6.2

11.6.3

11.6.6
Reduce the domestic water flow rate to approximately 3-4 litres/min. Turn the domestic control knob slowly to minimum the boiler output will reduce to the minimum setting. If low flame cannot be established in this way, turn off the electricity supply, and disconnect a grey wire from the modulator coil. Switch on the electricity supply, the boiler will now light at the minimum setting. When low flame is established the pressure reading should be : Plus AG (LPG) 3.7 mbar (Plus or minus 0.37 mbar) If it is different adjustment should be made in accordance with the instructions in 8.23.

11.6.7

11.6.8
If a grey wire was disconnected from the modulator coil to check the minimum setting, turn off the electricity supply and reconnect the wire. Maximum Rate in Central Heating Mode The Linea range does not require any adjustment to the maximum heat requirement of the system load. Setting the Minimum Rate for Central Heating The Linea range does not require any adjustment to the minimum heat requirement of the system load. Soft light ignition and range rating for central heating is fully automatic, no adjustment is necessary. Turn mode selector to the OFF position, disconnect pressure gauge, re-tighten screw. Relight boiler. Re- check for gas soundness. Replace electrical controls panel. Refix the boiler casing (fig. 24). Hinge up controls facia and secure using the 2 screws (fig. 25).

11.11 11.12 11.13 11.14

energizing home heating

Vokra Ltd.

Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP Email: enquiries@vokera.co.uk Web: www.vokera.co.uk General Enquiries - Tel: Fax: Technical Advice - Tel: 0520 Spare Parts - Tel: 6820 After Sales Service - Tel: 0220

Vokra Ireland

West Court, Callan, Co Kilkenny Tel: Fax: 056 55060
Vokra Ltd. reserve the right to change the specifications without prior notice. Consumers statutory rights are not affected. A Riello Group Company

COLLECTIVE MARK

Vokra supports Benchmark
Cod. 10023217 - 20/02 - Ed. 3