Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

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Coleman DGAA070BDTA furnace with 7990-328 gas valve. I want to convert from NG to LPG. I need to change the orifiice. Is there anything elese? I don't see a reversilble regulating device referenced on door palel. Connection to the valve is a pipe tread/compression nipple.

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Dan Webster

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You gotta flip the nat/LP nut on the gas valve itself. All the burner orifices need to be changed or cranked down if they have spuds and the air shutters opened up. Then ya might have to tweak the system.

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Posted on Nov 21, 2010

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To convert from N.G. to L.P. you will need to change pilot and all burner orifices. And change gas valve pressure regulator. Gas valve must be convertable to accomplish this. Do not try to use N.G. orifices fof L.P. as L.P. runs at amuch higher pressure than natural gas and holes in orifices are much smaller. If worst comes to worst you can purchase convertable valve and the right orifices. Or change orifices and install L.P. gas valve. I hope this helps you. Thanks.

Posted on Nov 21, 2010

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You will will have to change the reg as ng burns at 4inches and lpg burns at 14 inches and pilot orffice if fitted

Posted on Nov 21, 2010

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