17 replies to this topic

[icarus]

I recently bought a used stove. It has been converted to L/P and now it needs to be converted to NG. I cannot find a source for the NG orifices,, everybody wants to sell me all new burner tubes,, even though you can buy the L/P orifices!

Does some one have a set on the bench that are surplus out of a converted stove? That model uses orifices that are the same for a number of makers. Barring that, can someone give me the proper drill size of each of the 3 sized orifices so that I can drill out the L/P ones to the proper sizes?

With kindest regards,, thanking everyone in advance for any help,

Icarus

[SANTA]

Sorry icarus, I didn't find anything but until someone else comes along on this forum with the answer, did you search the oven inside and out for the NG orifices. They should have been taped somewhere inside the oven when it was converted if the person doing the conversion was thinking into the future.

[icarus]

The previous owner did look carefully. I am don't actually have the stove yet. I know what the converter should have done,,, question is what did he do?

Like I said, there must be thousands of those orifices out there some where!

Icarus

[KurtiusInterupptus]

There are many different sizes and types of orfices...without the actual drill sizes of the orfices, no way you can properly fit any orfices in this stove. I could not get that model # to pull anything up.
Are you in Canada ?

[RegUS_PatOff]

fpdf4084kf

might that perchance be a
fpdf4085kf ?

[icarus]

My bad,,, it is a fpdf 4085 kf, sorry about that folks!

I have the L/P orifices,, I just need to know the drill sizes,, or better yet source a set of NG orifices. I should also note,, I would like to get a copy of the conversion instructions as they don't seem to be available on line.

Icarus

PS Thanks everyone for your help..

[KurtiusInterupptus]

I can't see that they are available that way either...
you seem capable and willing so I will tell you...
obviously, since the unit is LP now, the existing orfices are smaller than NG orfices, giving you some room to experiment.
Generally, LPs are about half the size of their NG cousins. With a good numbered set of bits, you could experiment with each one till you find the proper size. Just flip the regulator back to NG and have some fun!

[icarus]

So, the top burners have ratings of 5K, 9100,and 13K BTUs.



So, by my calcs from here:
http://www.joppaglass.com/burner/lowp_chrt.html
ORIFICE SIZE (DRILL SIZE) DRILL SIZE Decimal Equivalent Natural Gas Natural Gas LP Gas ↓ Gas Pressure→ 4" WC 7"WC 11" WC Gas use in Btus/hr Gas use in Btus/hr Gas use in Btus/hr 75 0.021 1200 1600 3080 70 0.028 2125 2825 5475 65 0.035 2240 4400 8560 60 0.040 4350 5750 11175 3/64" 0.047 5975 7900 15360 55 0.052 7350 9710 18890 50 0.070 13300 17590 34250


So the 13K burners would have a ~ .040 hole, the 9100 should have ~.035, and the 5k should be ~.028,, does this sound about right? (For L/P)

Therefore, I could use the current .040 for the the 5k unchanged (may be a bit too small)

Then use the .035 for the 9k burner,, and then drill one out to .070 for the 13k for NG

Does that sound about right?

Also, not having done a Frigidaire, and not having the paper (or on line instructions) does the regulator just change from NG to L/P with a flip like most common stove regs?

Once again,, thanks for any and all help,

Icarus

Sorry, the chart didn't copy, if you click the link there is a pretty simple chart showing drill sizes (decimal eq) and BTU range with both 4", 7" and 11" WC gas.

Icarus

[RegUS_PatOff]

L0205223.pdf
INSTALLATION INSTRUCTIONS FOR CONVERSION
from NG to LP / PROPANE
and from LP / PROPANE to NG
... need Orifices:
(2) 107N
(2) 150N
(1) 180N
(available from local appliance parts stores)

[icarus]

RegUS,

Thank you ever so much. The web is a wonderful resource,, when people are willing to help. (Kurtis et al too!)

So the PNs you provide are the LP orifices. Any idea on what the hole size is for either the L/P or NG?

Icarus

[RegUS_PatOff]

... So the PNs you provide are the LP orifices. Any idea on what the hole size is for either the L/P or NG?

from PDF page (1)
LP Orifices:
61L
87L
97L

from PDF page 4
40" Duel Fuel
NG Orifices:
107N
150N
180N

[icarus]

I noticed the PN for L/P and NG in the instructions. Do the PNs relate to drill size or decimal size by chance?

Perhaps with those PNs I can find a set of NG orifices.

Thanks once again,

Icarus

[RegUS_PatOff]

from some on-line searching,
ORIFICE
61L = .61 mm
87L =.87 mm
97L = .97 mm

107N = 1.07 mm
150N = 1.50 mm
180N = 1.80 mm

some more reference
http://www.accurateb...tionalChart.pdf

[icarus]

Very good,, once again thanks, I will now just get the proper drill sizes,,

Icarus

[icarus]

So, would you all suggest that I drill them out using the actual size, or perhaps one or two drill sizes smaller on the theory that my drilling isn't going to be as precise as a machine shop would do? In other words is it likely that they may end up a touch bigger than the actual drill size.

Finally, how precise does the drill size have to be? Is one or two drill sizes either way matter all that much?

Once again,

Thanks for the help, with kindest regards,

Icarus

[KurtiusInterupptus]

Always better to err to the side of too small....you can reinstall and experiment...

Anytime something is measured in hundredths of mm...is pretty crucial.

[jumptrout]

These are very easy to tap. In fact you can use a pair of vice grip pliers to turn the bit. Your hole is already centered. Two turns of the bit and you are done.

[icarus]

thanks guys,,

Icarus