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Old 23-09-2009, 23:54   #16
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Dear Chris, thank you for your replay and information. From the beginning I decided to use an evaporator plate.
For the cooling of the system there are the air cooled system and the water cooled. If I use the water cooling, I prefer to stay away from and forced water circulation because of the extra water pomp. An keel cooling system looks great , but there are again different systems. Do you have any information about them please.
Then, by building your own box, there is the problem of the moister barrier, what do you know about it.
Regards. Willy

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Old 24-09-2009, 06:26   #17
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Have an Isotem 13 years old works great. I think the weakspots on fridges are insulation I know many with newer boats are disappointed. Boxes leak the chilly air./ Harry

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Old 24-09-2009, 06:55   #18
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I can understand you concern about the pump. I went this way because I needed to install the compressor in Jubilee's Lazarette, where it gets hot. The pump on these units has a voltage reducer that allows it to run on 1/2 voltage, so it draws less power.

I agree that a condenser unit is the way to go most of the time. I may end up regretting the seawater system, but our hope is that in very hot conditions, it will shine.

Concerning the SP units, I would think they would be great, as long as you are not anchoring/berthing in very calm conditions. I would like to know from Isotherm that even in these conditions, the unit would be cooled sufficiently.

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Old 27-09-2009, 21:35   #19
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Originally Posted by mbu745 View Post
Hello CptJohn1, I'm busy to build myself a fridge box with vacuum panels. We're most of the time in tropics where water- and air temperatures are high. I gone use an evaporator plate and a Danfoss 35 compressor. Now I have a problem, what type of cooling system is the most economical. For most systems there are pro- and contra. Do you have more information on those items. Can you please keep me informet what you find out. Regards. Willy
Thanks for the reply. I'm still looking and haven't installed a new system yet.
The Isotherm SP does sound great though.
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Old 27-09-2009, 22:09   #20
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Originally Posted by Auspicious View Post
I have Isotherm SP for a refrigerator and separate freezer. I'm in Annapolis and very happy with the cooling and energy consumption.

Can you tell me the exact model, size of your ice box and whether you have a BD35 or a BD 50 compressor.

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Old 11-04-2010, 15:10   #21
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For those of you who installed your own units....

I just got an Isotherm Cruise 130. It came with a rather unwieldy 3 sided mounting flange. Putting things together, it looks as if the flange is supposed to be screwed to the fridge, and then into the cabinet.

My fridge lacks any holes that might mate up with the flange. It has a wide (3" or so) metal band that is in exactly right location for mounting the flange. Am I right in assuming that I am expected to drill the appropriate holes?

I am somewhat hesitant to take a drill to my nice, new, very expensive fridge....
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Old 13-04-2010, 06:05   #22
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OK, for posterity, here's what Isotherm had to say:

The flange is lined up with the face of the door so they are both flush. Tapping a small hole with a drill or punch will get your metal screws started. 3/8" screws are perfect.
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Old 13-04-2010, 06:14   #23
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We have an Isotherm SP ("self-pumping") fridge (front-loading), and a separate top-loading Isotherm SP freezer.

We haven't been in the tropics but they seem to be good. The "self-pumping" thing is very clever -- the condensor coils are mounted inside a special sea cock, which is connected to deck drains. The natural movement of the boat is supposed to pump the water up and down over the coils. That means -- no salt water pump, no extra through-hulls, nothing to clog. Besides that, the system can be run dry -- will work (with reduced efficiency) when the boat is on the hard.

Seems like a good system to me. A bit of a variation on the keel cooler; probably more efficient due to the condensor coils themselves being immersed in sea water. And without the extra holes in the hull required by keel coolers (or for that matter, by regular sea-water cooled fridges).

I especially appreciate the fact that the system requires no additional holes in the hull, besides what you already have for your deck drains.
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Old 13-04-2010, 06:52   #24
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Hi, I put is the waeco (isotherm) unit from west marine, all by myself, absolutely terrific, I am in Thailand, cabin temp around 37 to 31C minimum, freezes water if turned up to 7. I run it at 1 most times and keeps the ice box at around 7 to 10 C. Draws about 6 amps when its on. Just wapped the evaporater into one of the smaller ice boxes (100Litre) in the stoopway to the aft cabin, drilled a few holes, all pipes charged with gas and ready to go.

One thing I would strongly recommend is putting in a fan forced evaporater unit, the passive ones are hopeless in the tropics, also put a 5" computer fan in the cabinet under the sink where the unit is installed, comes on when the unit starts.

One of the best thngs in the boat!!

Keith, "But I was born very young and grew up knowing little of the world!"
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