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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. 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. 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). 2.3 Loosen main injector nut on airbox and disconnect from injector, see diagram 3, A. SERVICING INSTRUCTIONS REPLACING PARTS 2. BURNER UNIT REMOVAL 1 2 3 4 A AR0391 AR0943 AR0498 AR0385 Viewing slot on Marlborough only A 3. PILOT UNIT 5 19 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. 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. SERVICING INSTRUCTIONS REPLACING PARTS 4. IGNITION LEAD AND PIEZO 5. PIEZO 6 7 8 AR0915 AR0916 6. GAS VALVE 9 20 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 the control cover, insert the narrow blade screwdriver into the slot shown in diagram 11. Lever it gently and pull from the right-hand side at the same time. The cover will now come off. There is a small cylindrical metal spacer inside the cover. This must be kept and replaced on the fixing screw during re-assembly. 6.5 Disconnect the ignition lead from the gas valve. 6.6 Undo the two bolts securing the gas valve to the appliance and remove the valve. 6.7 Replace in reverse order. 6.8 Check all joints for gas leaks. Check operation of the thermocouple and ignition lead. 7.1 Turn the gas supply off at the isolation device. Undo the thermocouple connection from the back of the gas valve. Pull the sensor leads clear and remove the interrupter block. 7.2 Undo the magnetic valve-retaining nut from the back of the control valve. Gently tap out the magnetic valve and replace with a new unit. Replace the retaining nut and tighten. See diagram 12. 7.3 Reassemble the interrupter block and leads. Secure the thermocouple connection in the rear of the gas control. (Do not overtighten). Turn the gas supply on and check the entire pipework and valve joints for any leaks. 8.1 Turn the gas supply off at the isolation device. Locate the main injector on the LH side of the airbox, undo the compression nut and pull the pipe clear of the injector body, see diagram 13,A. 8.2 Rotate the injector until it is fully removed, and install the correct replacement injector. Reassemble and turn the gas supply on, check for leaks. . SERVICING INSTRUCTIONS REPLACING PARTS 7. MAGNETIC SAFETY VALVE 10 11 AR0915 AR0916 12 8. MAIN INJECTOR 13 A AR0498 21 If the stove has been installed in a restrictive location, it may be necessary to remove the stove from its location. 9.1 Locate the sensor in the draught diverter opening, and gently pull the two wires off the terminals. Undo the two taptite screws and remove the sensor and the two plastic spacers. See diagram 14. 9.2 Refit a new sensor ensuring the spacers are located between the sensor and the bracket. Replace the two leads. 9.3 If it has been necessary to remove the stove, ensure that all disturbed gas joints are checked for gas soundness when reinstalled, and repeat the flue clearance test as detailed in the Commissioning Section. 10.1 Turn the gas supply off at the isolation device. 10.2 Locate the aeration plate on the underside of the airbox and remove the Nyloc nut, see diagram 1...

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