Refrigerators - Page 2 - Fiberglass RV


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Old 04-30-2016, 03:36 PM   #15
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Name: Jim
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This discussion regarding frig fires is timely as I am in the process of installing a larger frig in my ’83 Scamp and came across something “interesting” while removing the old Dometic 211.

The photo shows the top view of the piece of fiberglass that extends from the rear of the frig to the top external vent to help vent the exhaust gases and seals off the combustion area from the inside of the camper. The cut out slot is for the gas line that goes up to the stove, and the angled side goes to the far left of the vent.

The bottom side of that same piece of fiberglass shows the effect of heat coming from the top of the flue just below it. Looks a little crispy there doesn’t it? Good case for why Dometic specifies fireproof materials be used along with minimum clearances from combustible materials in their appliances or else my camper would have been toast a long time ago.

Hope someone doesn't decide to substitute a piece of plywood or cardboard the next time they work on their frig!
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frig mod 010.jpg   frig mod 011.jpg  

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Old 04-30-2016, 05:14 PM   #16
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Quote:
Originally Posted by Scamper Jim View Post
This discussion regarding frig fires is timely as I am in the process of installing a larger frig in my ’83 Scamp and came across something “interesting” while removing the old Dometic 211.

The photo shows the top view of the piece of fiberglass that extends from the rear of the frig to the top external vent to help vent the exhaust gases and seals off the combustion area from the inside of the camper. The cut out slot is for the gas line that goes up to the stove, and the angled side goes to the far left of the vent.

The bottom side of that same piece of fiberglass shows the effect of heat coming from the top of the flue just below it. Looks a little crispy there doesn’t it? Good case for why Dometic specifies fireproof materials be used along with minimum clearances from combustible materials in their appliances or else my camper would have been toast a long time ago.

Hope someone doesn't decide to substitute a piece of plywood or cardboard the next time they work on their frig!
Is that actually charred, or is it carbon build up?

The reason I ask is that, 1) looking closely I can see what appear to be fiberglass fibers in the polyester matrix, which would indicate discoloration and not actual burning and 2) there are 2 darkened spots, one darker than the other. The Dometic I have, and others I have seen,have a angled tee shaped stack on the top of the flue. It only an assumption on my part, but I think the angle is to allow cooler air to be drawn in and mixed with the hot air as the combustion gases escape the flue. In any case that would put one side closer to the fiberglass than the other, which would explain the light and dark marks.

If the fiberglass isn't actually charred and what we are seeing is carbon build up, it's time to clean the flue, the spiral baffle and the burner. When you put it back together, make sure the air is set properly to give you a nice blue flame.
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Old 04-30-2016, 06:06 PM   #17
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Clif,

It's definitely charred, no carbon soot.

Could you post a photo of the "...angled tee shaped stack on the top of the flue."

Jim
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