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Re: procom MN300HPA ventless heater conversion
You need to first get a regulator which will go between the propane tank and the burner. You will need to know the burner capacity in BTU/HR and the pressure required. All of this can be found on the furnace specification plate or on the gas valve. It is a no brainer Circut!
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yea,they don't want any liability.a pressure conversion for most gas valves is simply changing a spring.you can get an adjustable regulator if yours doesn't come apart.sounds like you have enough pressure I'd take the piolit apart and open up the orfice hole its real tiny.also burner hole could be widened a bit.I'd never do this for a customer because of liabality,but would be safe as long safties are in place
Found the manual on line and copied directly from it:
Models FBN400 are equipped for Natural
gas. Field conversion is not
Models FBL400 are equipped for Propane
gas. Field conversion is not permitted
This should answer your question.
See if you can run the gas line or find someone to do it cheaper for you.
you need to find a place that makes your type of heater and they will have a change over kit all it is different orfices and jetcovers for each gas jet from your heater its self explanitory once you see the parts,sometimes there are different gas comp. that if you use there service they will change you over at no or little cost. hope this helps
I have a similar problem. But, I want to convert it to propane. I have a 5 burner vent free modelMN300HPA. If your are handy. I would consider shipping you the parts inside mine to install in yours. These parts are very simple to remove after removing the access panels. I have taken mine out already. Called procom then to no less find out the propane parts needed are not sold by them. I think only the injectors (5) the main valve (regulator) and the pilot are the only things need to change. When taking out the pilot this is easly done, By removing the nut on the supply line. And then bending back the retaining tabs to then slide back the pilot then it comes out of the assembly bracket. Injectors are simply removed. Regulator located at the bottom is a simple remove. The only other item that might be questionable would be the valve that selects the amount of burners you would like to operate. And I would think this would be the same and not need removing. Let me know if I can help. I would like to get mine converted to propane. Thanks Tom
Propane appliances usually run on 10-11 inches of water column, this is about 1/2 pound of pressure. If the regulator you have is not rated for delivering gas at that rate, you will need to find one that does. If your regulator is rated for more than the 11 inches, most likely you could have damaged the appliance regulator that came with the heater. Check the propane pressure specified by the heater manufacture against the rated supply of your regulator and see if they match.
Make sure the heater is rated for Propane and NOT Natural Gas. Check to see if the gas valve on the appliance is in the operate position and all valves are open. Bleed off the air in the gas line by holding down the pilot switch and keep attempting to light the pilot. It could take you a few minutes. If you hear and smell gas but the unit will still not light, don't chance at getting hurt, call a technician.
Look to make sure there are no safety switch that may have triggered off not allowing the gas valve to operate. And make sure there is no obstruction in the heater?s gas valve blocking off the supply of gas.
Always exercise caution when it comes to gas and if you are uncomfortable, call a qualified gas technician.