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Old 07-26-2016, 02:55 PM   #1
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Convert dometic to danfoss?

Has anyone done this? Remove the evaporative cooling parts and replace it with a kit from isotherm? Our fridge has started to not work every time we move. I got a norcold model that has the secop danfoss combo but the wife hates it due to the different layout from the dometic.

We live in the Colorado front range mountains and have decided that we are done with evaporative cooling.

The isotherm kit looks ideal with two cooling plates. Thanks in advance for any feedback!
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Old 07-26-2016, 03:33 PM   #2
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Sounds like an excellant project. I have built from scratch over a dozen marine fridges using Danfoss components. Basically plug and play. Definetly will require upgrades to your battery system. Increased solar and lithium battery (???????????) additions would be nice. I would also consider fridge box insulation upgrades. If my fridge ever craps out I believe that a Danfoss upgrade would be worth consideration.
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Old 07-26-2016, 06:10 PM   #3
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Great advice on the power side, we will be addressing this too.

As an aside, any thoughts on the Atwood helium units? Reviews are mixed to say the least.
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Old 07-26-2016, 10:13 PM   #4
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When our Demonic fridge poops out, we'll be investigating Vitrifrigo as a replacement...hopefully after we've upgraded to Lithium batteries, etc.
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Old 07-27-2016, 12:12 PM   #5
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When I replaced my Dometic with an apartment-style fridge, I got 2 cubic feet more interior space in basically the same footprint. I've had my Igloo fridge in place now for about 7 months, it's still running strong. Not bad for $200!

If you're going to roll-your-own fridge, why not figure out how to make some sort of a super-insulated box that would make a Yeti ice chest slink away in shame?
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Old 07-27-2016, 12:21 PM   #6
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Sounds like a good idea to me, then you could have a solar powered fridge! I've always wanted to do this but never got around to it since the Sanyo apartment size fridge has been working well and I like shore power for heating and cooling anyway.
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Old 07-27-2016, 03:56 PM   #7
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Sounds like an excellant project. I have built from scratch over a dozen marine fridges using Danfoss components. Basically plug and play. Definetly will require upgrades to your battery system. Increased solar and lithium battery (???????????) additions would be nice. I would also consider fridge box insulation upgrades. If my fridge ever craps out I believe that a Danfoss upgrade would be worth consideration.
How about a few details on building your own fridge?
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Old 07-27-2016, 04:14 PM   #8
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How about a few details on building your own fridge?

Almost the same process I used. They explain it much better than I can.

http://purplesagetradingpost.com/sum...ds/page-1.html

I have never converted a prebuilt stand up type fridge. I would thank it would be a much simpler process than starting from scratch. All of the compressor kit makers have excellant customer service departments that will discuss fitment issues and what might be the best system components to use for a conversion. Good luck if you decide to give this a try.
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Old 07-27-2016, 08:51 PM   #9
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I put a danfoss fridge per Lewsters recommendation - absolutely love it - I have only 1 150 amp Lifeline - just got back from a four day boon dock rally and only had to top off battery once - even then not sure it was necessary

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Old 07-27-2016, 10:40 PM   #10
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I put a danfoss fridge per Lewsters recommendation - absolutely love it - I have only 1 150 amp Lifeline - just got back from a four day boon dock rally and only had to top off battery once - even then not sure it was necessary

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Ken - which one if you don't mind? I am considering a refrigerated drawer from Isotherm or Dometic - both use the danfoss compressor and each are 1.3 to 1 cubic foot, respectively. The additional load should not be much and since they will be independent, we can turn them on for trips that need them. A little custom wood work but thats OK as it is one of my hobbies and I am well equipped to make anything needed in that respect.

As to the full custom idea - definitely considered that, but between my job and my kids, that level of project is a bit much. Some trim and basic electrical is well within reach though, hence the drawer idea to make up the lost space.

Love the boat build link. The level of thought and overbuilt craftsmanship that went into it is fantastic! I do plan to better insulate whatever solution we go with. There is at least a half inch of dead space that could easily be filled with some rigid board foam and definitely 'traditional' fiber glass batting, so long as we keep with the compressor vs. evaporative solution. The amount of fresh air coming in from the stock outside venting will be more than enough.

Next question I plan to answer is whether there are ceramic-bearing DC fans, and if so, whether the load reduction improvement is worth the cost. Each danfoss unit that I have seen at least, has a DC cooling fan. I know the value of ceramic bearings so.. the hunt for greater efficiency begins!

thanks to all who have replied, and I know how much of a proponent that Lewster is, and how much respect I have for his inputs.
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Old 07-28-2016, 07:56 AM   #11
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Not sure what size - think it about 3-4 cubic in - anyway I had planning on insulating more and putting a fan in the back - in the end did not need to - in fact they recommend not putting in any additional insulation


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Old 07-28-2016, 08:16 AM   #12
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Do you think 220ah 6v Lifelines is enough capacity to run a Vitrifrigo when towing all day? I'll have 200w solar on the roof that can charge while towing and the ability to hook up an extra 200w of portable panels if we dry camp. Or do you really need more battery capacity and solar to support this type of fridge if you do any type of dry camping.

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Old 07-28-2016, 09:24 AM   #13
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Oh yes - you have tons of power for it - remember I just have one 12v 150 amp battery
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Old 07-28-2016, 10:10 AM   #14
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Cool. If my Dometic gives up the ghost I'll switch to a Vitrifrigo. I know just the place to have install it for me.

My Dometic was struggling this past weekend out at Table Rock Lake this past weekend, 96F and high humidity and the trailer as in full sun. Had all my awnings deployed. The Airstream sat in the sun at home prepping for the trip without the A/C on and it was 100F in the trailer. With a thermometer in the fridge is was about 28F at 7:30am but by 5pm it was up to 40. By the time we got to the lake it as about 43F. With the A/C and overnight cooling back down near freezing. With the A/C and the awnings out it kept below 40f. Kept the beer in an ice chest inside the trailer. Still had a fun time swimming, biking and taking a 5 mile walk. Why do I have to come home

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