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either the spud on the orfice that feeds gas hasn't been turned down on the orfice or if it has then the air shutter hasn't been opened up to where it says L.P. on the shutter as L.P. needs more air to complete combustion,if the flame can be seen flaring up then its the orfice spud and if this isn't adjusted,then most likely the air shutter hasn't been adjusted either
being this is a commercial oven you will nee3d to go to a commercial parts purveyor to get the conversion parts,on residential units the orfices are included with the range when new for conversion at any time,the gas orfices need to be changed on the top burners,then the orfice spuds in the oven bake and broil units need to be turned down onto the orfice for conversion,your commercial parts person will have the steps with the conversion kit to do the change-over
that simple, all you can do it go to place where you can buy a LP orfice and LP regulator and remove all NG orfice and regulator out and install all LP orfice and regulator you ready to go for LP..
the burner orfices will have to be changed ans pressure reg / some have either /or reg / just turn lever to the fuel you are using . but always change the orfices to gas or lp . blk is lp copper nat gas .. you can probably do it with out the instructions it's very simple .. if the other set of orfice's are not in or on range then order them for your model . ..mm
First thing you will need to do is find out from the manufacturer of the oven if there is a conversion kit available and if the appliance is convertable. If there is then you can order the kit and follow the installation instructions. Also check the back of the oven for an envelope that may contain the gas orfice replacement heads to convert the appliance to natural gas. If you find the replacement orfice then you will need to remove the lp orfice from the burner and install the natural one. Then the appliance gas regulator will need to have the pressure adjusted lower for natural gas. There is usually a removable cap on top of the regulator on the oven. When you remove this cap there is usually a small metal ring that you can remove and flip over. It will say "nat" on one side and "lp" on the other. You will need to turn this ring over and re-insert so it displays "nat". This will change the gas pressure from 13 inches W.C. to 4 inches W.C. Some appliances only require the orfice change and no regulator adjustment but make sure that is the case with your oven because if you feed 13 inches W.C. pressure to a burner with a natural gas orfice...YOU WILL GET A HUGE BURNER FLAME AND MAY BURN/FLASH YOURSELF...So use extreme caution when converting a gas appliance. And if the oven has a pilot you will need to adjust the pilot pressure or change it's orfice if it has one. If it is electronic ignition no adjustment to that will be needed. Also unplug the electrical power the the unit while working on it.
WW Granger is the biggest supplier I know of for dayton. Consult them for information and if its still available.
In lue of this find the oldest repair man you trust and ask him if he knowes anything about them. I know I could help if I could see what you have and had some more questions answered. Pilot ignition? Gas valve model? Does it have a regulator in the gas valve? Then you have to find a kit to block open the regulator. Then change the orfices to correct size or solder and redrill the old ones. Then maybe adjust the combustion air, and you may have to change the pilot burner orfice and adjust it.
After that you can fill the LP tank.
Hope this helps IF so please grade me accordingly and Good Luck.
The orifice is not adjustable but there is a small air sheild around it that is held in place with 1 screw and needs only to be adjusted if the flame is not of a blue color (starting to get a yellow or orange color in it).
You guys like things that go boom. My advice is to get a certified gas tech. To change the orfice to LP you have to take apart the unit from the front.
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