Technical data

© MHG Heating Ltd
63
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
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Web www.mhgheating.co.uk
010109
The combustion setting required for all ProCon appliances are as detailed in the following table.
Gas Type High Fire Low Fire
Natural Gas (G20) 8.5% C0
2
9.0% CO
2
LPG (G31) 11.0% CO
2
11.0% CO
2
17.3 Conversion of the Appliance to Operate on LPG (G31).
Unless specified at the time of ordering the appliance/s will be supplied ready to operate on a Natural Gas
(G20) fuel supply.
The appliances data badge will indicate the type of fuel gas the modules have been set to operate with.
Prior to firing the unit for the first time it is advisable to check the size of the gas injector.
The injectors are located on the outlet of module gas valves.
The table below indicates the size of injector for the respective fuel gas.
If the unit is required to operate on a fuel gas different from that to which it is currently set, the following
conversion procedure must be undertaken.
Isolate the fuel and electrical supplies at the appliances isolators.
Disconnect the electrical connection for the gas valves solenoid coils.
Disconnect the gas valve from the gas supply tubing at the union immediately prior to the gas valves inlet.
Remove the ‘Circlip’ located at the outlet of the valve securing the injector to the fan inlet bracket.
Extract the gas valve and injector from the fan inlet bracket.
Install the correctly sized injector into the outlet of the gas valve ensuring to apply the sealing washer.
Reinstall the gas valve/s complete with correct sized injector/s in the reverse order.
Following completion of the re-injectoring of all modules the units will require recommissioning as detailed
in section 15.2.
Gas Type ProCon 16 ProCon 27 ProCon 45 ProCon 75 & 77
Natural Gas (G20) 4.0mm 10.0mm 12.0mm 15.0mm
LPG (G31) 3.5mm 6.0mm 7.0mm 10.0mm