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I have a shop with a Modine (model PD125AA0111)heater that is currently set up for propane. Last year I ran the heater off of propane bottles and just recently ran a natural gas line run to the shop and need to convert the heater to natural gas. The Modine heater originally was set up for natural gas but before I bought it someone converted it to propane. Now I need to convert it back. The specs on the side of the heater give me the orifice size for 0-2000 ft elevation. I am at 4500 ft. Can I just drill out the existing orifices to the specs on the heater for natural gas?
For the gas valve (Honeywell VR8200A 2900) I need to change the spring and adjust the pressure. Right? I while ago I took some parts out of a home furnace that someone was junking so I have a gas valve spring and orifices for natural gas. The orifices don't fit my shop heater so I cant use them. Will the spring work for the gas valve in my shop heater? I don't know if the gas valves are the same make or model. Any other coaching on adjustments are welcome. - Thanks
My wife's grandpa did this stuff as a career and gave me a bunch of related tools that I kinda know what to do with but I'm not sure about what I'm doing. I'm sure that he could help me if he were here.
![20201030_082730.jpg 20201030_082730.jpg](https://www.snowest.com/forum/data/attachments/305/305011-e90ad4929e7e2ec29048dcbe8608b25e.jpg?hash=6QrUkp5-Ls)
For the gas valve (Honeywell VR8200A 2900) I need to change the spring and adjust the pressure. Right? I while ago I took some parts out of a home furnace that someone was junking so I have a gas valve spring and orifices for natural gas. The orifices don't fit my shop heater so I cant use them. Will the spring work for the gas valve in my shop heater? I don't know if the gas valves are the same make or model. Any other coaching on adjustments are welcome. - Thanks
My wife's grandpa did this stuff as a career and gave me a bunch of related tools that I kinda know what to do with but I'm not sure about what I'm doing. I'm sure that he could help me if he were here.
![20201029_200109.jpg 20201029_200109.jpg](https://www.snowest.com/forum/data/attachments/305/305010-36097390150759c9ff4006b04e530e6f.jpg?hash=NglzkBUHWc)
![20201030_082730.jpg 20201030_082730.jpg](https://www.snowest.com/forum/data/attachments/305/305011-e90ad4929e7e2ec29048dcbe8608b25e.jpg?hash=6QrUkp5-Ls)