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Old 05-28-2010, 12:11 PM   #15
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We installed a DanFoss powered Tundra refrigerator in our Liner. The unit is 9.5 CF.

Advantages: runs 30 degrees off level, no need to cut vents in side, bottom or top of trailer (however must be ventilated in cabinet), no propane needed, runs native on 12 or 24V, automatically switches to 110 when hooked up, uses less electricity than a fantastic fan on high.

Disadvantages: no less expensive than ammonia absorption units, compressor noise and slight vibration when running, must have a way to keep batteries charged.

We installed solar panels to recharge batteries, purchased two 80 watt units, one panel did not generate enough electricity to keep batteries charged, installing the second panel seems to work.

Bill
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Old 05-29-2010, 09:06 AM   #16
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re: "There IS a third option. Many marine refrigerators/freezers operate with a device called a DANFOSS COMPRESSOR."

These things are very expensive. What I have seen recently, such as the NAWS discussions I mentioned, is that it is more cost effective to just get an Energy Star rated modern fridge plus a solar panel and an extra battery to get the same effect at less cost.
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Old 05-29-2010, 11:55 AM   #17
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Fridge in TW

I bought a replacement Dometic from PPL here in Houston. Good pricing and it was similar to the original, had to do some modifications on the panel.
The thing about propane is that the fridge is cooling while you are making that long trip down the road between the stops where you can plug in. Not too good for milk or other dairy items that like to stay cold on the trip (beer).
And who wants to fill an ice chest with ice on the road. Turn it on let it cool down while you are loading up and you'll have ice when you get to your destination. As said above "priceless."
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Old 05-29-2010, 03:28 PM   #18
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Most interesting stuff, is it typical to add a Danfross compressor to an existing unit or do any particular manufacturers use the Danfross compressor in a ready to go package?
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Old 05-29-2010, 03:38 PM   #19
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Originally Posted by truckasaurus View Post
Most interesting stuff, is it typical to add a Danfross compressor to an existing unit or do any particular manufacturers use the Danfross compressor in a ready to go package?
Both Dometic and Norcold use the DanFoss compressor.

Another advantage is the quick cool down time. In a matter of minutes the freezer floor feels cold. This is because the compressor pushes the coolant through the system rather than relying on the passive ammonia absorption system.

Bill
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Old 05-29-2010, 04:43 PM   #20
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Great thread. I'm wondering about the 3-way units vs all electric. I my self wouldn't use a home depot dorm fridge, having had bad experiences with them- I can't imagine they'd hold up to much travel, but curious to hear what experiences others have. The Danfoss unit sounds interesting, but i'm also curious about the unit running while driving- I thought it ran on 12v, not propane while on the road? The gas units also sound really tricky to get running properly, sensitive to level and stuff. For our first trip, we used a 12v Coleman cooler, plugged into the plug for the fridge, jammed into the space in the cabinet where the fridge would go, and in the truck with us while under way. They're slow to cool, but it worked for the trip, for about $125 at REI.
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Old 05-29-2010, 06:07 PM   #21
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Globie,

The DanFoss unit does run on 12V and mine (9.5 CF) draws about 3.5 A.

Bill
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Old 05-29-2010, 07:42 PM   #22
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I need to replace the fridge in my 66 Tradewind, and was thinking of putting an electric-only in but would like to find one with the closest measurement to original. The original measures 40 1/2 inches by 20 1/2 inches and is 24 inches in depth. If anyone has done this or has any info I would appreciate it. I have been informed that electric-only units are not as durable in an RV, but I travel short distances to area campgrounds. Thank you,,, Kelly
Dear Kelly, I have a '66 Sovereign with an electric replacement fridge. Since I use the Sovereign on a seasonal rate basis,the electric unit works out just fine. Being an Airstream and meant to travel ,it does. I compensate with a good Coleman ice chest.I've had ice last three days with replacement ice available at the park ranger stations in state parks if need be.An ice chest is not a down grade and will not lessen the experience of being out and about.Some people may need that lp fridge.My personal preference is to reach into that cooler and pull out a cold one.I see this as adding to the whole experience.The worth of life is not in dollars and cents.
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Old 05-30-2010, 12:45 AM   #23
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re: "I've heard nothing but good things about the Danfoss compressors." -- you might want to browse through NAWS forum discussions. N Az Wind Sun stopped selling them for reasons worth considering.
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Old 05-30-2010, 07:20 AM   #24
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When our original fridge quit in our 66 tradewind we looked at many different ones to find one of similar size. The best fit was a frigidaire from lowes, plus they had one in silver. Once it was installed it looked great and we never had a problem with it.
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Old 05-30-2010, 08:29 AM   #25
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Many of the large bus-type RVs now come with 'residential refrigerators' and many have no propane at all...........they are all-electric.

Of course, when you weigh upwards of 40,000lb GVW, you can have 15KW on-board diesel generators, Aqua-Hot diesel fired hydronic heat/hot water systems, 900 amp/hour battery banks, twin 2000 watt inverters, and so on.

This segment of the RV industry is rapidly approaching the 'house-on wheels' concept visualized by some of the original RV developers 100 years ago.

But for practical purposes, considering weight and space limitations, the Danfoss compressor units afford the best mix of cost, size, performance and low energy consumption.

I might be experimenting with the conversion of my current Norcold unit in my Beaver Coach sooner than I planned, as it seems to not be operating properly. I'll be testing it this week and will start a new thread on the conversion if it happens before I depart for OR.
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