6.7 Frig Tinkering ideas? - Page 22 - Escape Trailer Owners Community

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Old 04-16-2015, 12:46 AM   #211
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Fan and flue extension.
I used adhesive to attach the plywood to the frig and mount the fan(s). I chose this fan from ARPrv | RV Refrigerator | RV Fridge Control | Install by Cooling Unit | RV Fire Paul and the web site are a great resource.

I also installed the Controller and use it for fan control, monitoring and testing.

I understand that the critical place for the air movement (wind chill) is the condenser. The boiler runs at 160+F and the condenser must have a temperature differential sufficient for condensation of the mix.
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File Type: jpg 2015 4 frig before reinstall.jpg (215.3 KB, 33 views)
File Type: jpg 2015 4 frig before install close flue vent.jpg (180.6 KB, 33 views)
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Old 04-16-2015, 12:55 AM   #212
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Klem,

Did you get the flue extension direct from Dometic, or from another source? I am going to replace our fridge with the rmd8555, but I still think a flue extension would be a good idea
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Old 04-16-2015, 01:04 AM   #213
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That type of fan in that location looks like it'll do a much better job of moving air past the condenser than the typical installation.

I toyed with a straight insulated extension flue from the boiler. The factory one is designed to act as a natural draft flue. I wasn't sure if a straight extension would work without providing a fresh air intake at the bottom. But now I have you test it out for me.

I'll be monitoring temperatures in my boiler flue duct and the ones over the condenser and see how effective the boiler duct is at containing the flame heat.

Ron
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Old 04-16-2015, 01:13 AM   #214
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Originally Posted by LeonW View Post
Klem,

Did you get the flue extension direct from Dometic, or from another source? I am going to replace our fridge with the rmd8555, but I still think a flue extension would be a good idea
It's all parts from my shop. 1" copper pipe, a split piece for a spacer at the bottom (who cares if it leaks a little), then used some Aviation FormAGasket to marry the T into the pipe. Wrapped it with some exhaust header tape with 14ga ground wire hold it up. The top support is a piece of 1/2" steel strap and gave me room to adjust it in/out after looking down the vent slot.

The exhaust temp is around 125F so it just needs to get above the condenser section. I wanted it to slide in/out with the frig and not have any connections to make. It nests into an aluminum 4" dryer 90 vent twisted to match the vent walls.
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File Type: jpg chimney 4 inch extension pe.jpg (179.8 KB, 5 views)
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Old 04-16-2015, 01:21 AM   #215
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Originally Posted by Ron in BC View Post
That type of fan in that location looks like it'll do a much better job of moving air past the condenser than the typical installation.

Ron
Paul at ARPrv picked the fan for its cfm and low current draw, also quiet running. At that location you can feel it sweep smoothly through the fins. I'm hoping that's the sweet spot through the condenser. I have room to slide it over and mount a second in the future.

His controller monitors condenser temp and cycles the fan as needed.
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Old 04-16-2015, 01:22 AM   #216
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Just noticed the double condenser. Whoa, with an air current over those you should be able to get rid of a lot more waste heat.

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Old 04-16-2015, 01:29 AM   #217
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Insulation - I added some on the top and sides but after looking it over I think it could only help 'slightly'. I say that because when you open the door there is so much cold air dumped out of the box .. Which is replaced with cabin air.

I expect the flue extension and fan modifications to help considerably. I will post an explanation and photo soon.
While we are glad for 6.7 refrig 's getting some resolution . All of us with our 4.3 's sure feel left out because we only paid 200. Less in cash for our frig . Now we hear the new ones work better . How many of us would of paid the 200. To not have these problems . I am capable of doing some of these mods but a lot are not . Where does that leave them ? Why should we have to repair a new frig ? Just putting this out there . To say I am upset . I sure am . I know we appreciate all you trail blazers out there and please keep the fixes coming . Klem put the thermistor back in it's place and may at a later date attempt some of these other idea's . Wished some of you worked at Dometic .
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Old 07-23-2015, 01:01 PM   #218
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The End of frig tinkering for me .. Thank you ETI

Thanks to Reace and the ETI crew for swapping out my frig this week I'll close out the 'single door' era with an entertaining video. (we didn't like the single door? ... )

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Old 07-23-2015, 02:46 PM   #219
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I thought I heard him say its tested to perform at 43F in the fridge and 15F in the freezer at 110F in the desert?

Um, I'm gonna say that's a bit of wishful thinking.
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