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Old 10-25-2019, 11:33 PM   #1
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2015 28' Land Yacht
Chapel Hill , North Carolina
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Convert new Dometic fridge from 220V to 110V

Itís a long story, but I recently purchased a new Dometic RMD 10.5XT refrigerator from England and had it shipped to the US. I then installed it in my 2015 LandYacht (replacing a dead 8-series 3-way fridge).

The new fridge works great on propane. It doesnít work well on 12V, but itís better than nothing.

I have not yet done anything to make it usable on AC power. Because I purchased it in England (there was no US version available 6 months ago) it is 220volts. I think I have a few options to get it to work on 110 volts here:

1. Use a step-up transformer. Simple, but most are not rated for use where it might get wet or hot (behind fridge where it normally plugs in). And itís heavy (about 8 lbs).

2. Try to ďconvertĒ my unit to 110 volts. Of course, about 3 months after I paid a crazy amount of money buying one and shipping it to the Us, Dometic now lists the RMD10.5 on their US website. Do I need a new control box? Or can I just put a 110 3-prong plug on the existing cable and plug it in? Would I need a different heating element?

The electrical schematics for the British unit and the US unit appear to be identical, except the British plug ends in a WAGO fitting (for which Dometic sells an adapter to work with 3 prong outlets in England.

https://www.dometic.com/en-gb/uk/pro...adapt-_-206937

I measure the ohms on the existing AC heating element (211 ohms) but I did that with it still connected to the controller (couldnít figure out how to disconnect the wiring block or wires from the control board and didnít want to break it...

I canít find a parts list to see if the British and US fridges share the same control board. Or heating element.

Anyone have any ideas or suggestions? Access to parts manuals? Or even how to unplug that connector block in the photo below??

Thanks,

Matt
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Old 11-03-2019, 11:02 PM   #2
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get a 1:2 step up transformer and keep it close to the fuse panel.
that is a dry area. the fridge motors are tied to local AC voltage. not easy to replace
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Old 11-06-2019, 05:48 PM   #3
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I've considered that, but hate the idea of a 5-pound hunk of steel that adds 10-15% inefficiency. And there is no motor... it's simply a control board and heating element. And I'm not even convinced the control board actually uses the AC power...

Matt

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Originally Posted by waninae39 View Post
get a 1:2 step up transformer and keep it close to the fuse panel.
that is a dry area. the fridge motors are tied to local AC voltage. not easy to replace
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