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Manafacture: Stovax File size: 603.72 kb File name: Language of manual:

coal, soot etc. which could short the spark, clean the area. Problem is with the pipework or fittings which lead to the fire. Correct and retry. Is thermocouple connection good in back of valve? Replace oxypilot. Will pilot stay alight? Change mag unit. Is the pilot flame of the correct length? See diagram 1, Servicing Requirements Change the pilot unit. Will pilot With the pilot stay lit? running is the gas pressure stated on the databadge? With the fire running on full is the gas at the pressure stated on the databadge? Run for no more than 60 seconds turn off, time interval until mag unit shuts with a click. Is this greater than 7 seconds? Run for a maximum of 60 seconds, turn off, time interval until mag unit shuts with a click. Is this greater than 7 seconds? Tighten the connection and retry. No No No No No No Yes SYSTEM OK Yes Yes Yes Yes No Yes Yes No Light the pilot and keep the control knob pushed in at least 10 seconds before letting go. FLAME FAILURE FUNCTIONAL CHECK SERVICING INSTRUCTIONS FAULT FINDING CHARTS IGNITION FUNCTIONAL CHECK 2 NO SPARK Ensure there is no debris around the pilot assembly, (e.g. coal, soot etc.) which could short the spark, clean the area. Consult Section 2 on page 4, retry. Operate the valve to light the pilot, does the valve 'click'? Is the pIlot burner horizontal? See diagram 1, Servicing Requirements Has ignition lead become detached or is connection poor? Remove the electrode lead from electrode with insulated pliers. Hold the tip 4mm from the pilot pipework, is there a spark when the valve ‘clicks’? Is the electrode wire detached from the piezo in the valve? Replace the lead and, retry. Correct and retry. Check for defective or damaged control knob spindle or cam operation. Check for correct location of piezo components. Correct and retry. Remove the electrode lead from the piezo. Operate the valve. Does a spark jump from the piezo to the valve body? Is the valve being operated correctly? Reset the pilot burner. Yes Yes Yes No No No Yes Yes Yes No No Replace the electrode. Replace the electrode lead and retry. Replace the piezo and gas valve and retry. Yes No 20 2.3 Loosen main injector nut on airbox and disconnect from injector, see diagram 3, A. 2.4 Remove the 2 screws attaching burner to back of unit, see diagrams 4A & 4B. Carefully withdraw burner unit upwards and tilt to remove the burner through door opening. Remove the 2 screws holding the heat shield in place. Replace in reverse order checking all joints for leaks. 1.1 All principal components can be replaced without removing the stove from its installation but it is essential that the gas supply to the appliance is turned off at the isolation device before proceeding further. 2.1 Turn the gas supply off at the isolation device. Ensure the unit is cool. Use cover material to front of appliance to protect paintwork etc. Remove the door and place to one side. (4 nuts). Carefully remove the ceramic fuel components to a safe place. Remove front cover-plate (2 screws). Remove cover plate fixing bracket (2 wing nuts). (Small Stoves only) Unscrew pilot union nut on gas valve. See diagram 1. 2.2 Disconnect thermocouple from gas valve. See diagram 2. Remove ignition lead from electrode. (Cut cable tie to ignition lead if required). 1. GENERAL SERVICING INSTRUCTIONS REPLACING PARTS 2. BURNER UNIT REMOVAL 1 2 3 4B A AR0391 AR0943 AR0389 AR0384 AR0385 Viewing slot on Marlborough only A 4A 21 3.1 Remove the burner module as described in Servicing Section 2 above. Carefully cut the cable ties holding the thermocouple to the pilot pipe. Remove the HT lead from the electrode, undo the two retaining screws and remove the pilot. See diagram 5. 3.2 When replacing the pilot ensure the thermocouple follows its original route, i.e. along the pilot pipe. Attach the thermocouple to the pipe with new cable ties. 3.3 Set the spark gap. See diagram 6. 4.1 Gain access to the back of the pilot assembly, (see section 2) and disconnect the ignition lead from the electrode. 4.2 Remove the front cover from the control valve, (see diagrams 7 and 8). Disconnect the other end of the ignition lead from the valve body. Note the existing route of the ignition lead. 4.3 Replace with a new ignition lead following the same route as the old one. Replace the valve cover and the pilot assembly. 4.4 Check operation of the new ignition lead. 5.1 The piezo assembly used on this appliance is not serviceable and is unlikely to fail. 5.2 If a new piezo is required it will be necessary to change the gas valve. Refer to Section 6. SERVICING INSTRUCTIONS REPLACING PARTS 4. IGNITION LEAD AND PIEZO 5. PIEZO 3. PILOT UNIT 5 6 7 8 AR0915 AR0916 22 6.1 Turn the gas supply off at the isolation device. 6.2 Disconnect the 2x8mm and 1x4mm gas pipe fittings at the back of the gas valve and also disconnect the thermocouple, see diagram 9. 6.3 Undo the single screw that secures the left-hand side of the control cover, see diagram 10. 6.4 To release the right-hand side of ...

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