© MHG Heating Ltd
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MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 01737 358000 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010517
11.3 Conversion of the Appliance to Operate on LPG (G31)
The Wallcon boilers can be set to operate on Natural Gas or LPG. The Boilers come preset as detailed on the
information labels attached to each unit. If a gas different from that which the unit is arranged to run on is to be
used, a conversion kit is required.
The gas conversion kit is installed as detailed bellow.
1: Remove the boilers case via the six retaining screws at the bottom and pull the
bottom forward. Now lift the case up and off the locating bolts at the top.
2: Remove the gas solenoid wiring. Detach the gas valve from the
supply pipe via the union. Ensure gas is isolated if boiler has been
installed.
3: Remove the Air Inlet flexible hose from the fans venture connection.
4: Undo the six M10 bolts holding the burner door onto the heat exchanger and remove entire assembly from the
boiler.
5: Remove the venture screws and disconnect the gas valve.
6: Remove the O-ring and replace the nozzle with the correct one for
the gas to be burnt.
Gas Type
Wallcon 115/125/160
Natural Gas (G20)
10.7mm
LPG (G31)
9.5mm
7: Reassemble boiler in reverse of the procedure above, ensuring all joints are gas tight.
8: Complete a gas tightness test on the appliance to ensure no gas leaks following the work undertaken.
