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Old 15-08-2020, 07:03   #1
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help replace fridge evaporator

I have an isotherm fridge.

its old. thinking of just replacing the ecaporator as compressor and control works.

this is the water cooled model.

question.

maybe moisture in other components will damage evaporator.

should I just replace everything ?

question.

how do I go about replacing ?

run compressor inject refrigerant then remove old evaporator ?

thanks
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Old 15-08-2020, 07:29   #2
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Re: help replace fridge evaporatot

Buy a complete new system, its precharged, its easy to install.
Unless you have a complete set of hvac equipment, you can't just change the evaporator.
If it works now, why replace it?
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Old 15-08-2020, 10:28   #3
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Re: help replace fridge evaporatot

Does not work.

Leaking.
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Old 15-08-2020, 12:47   #4
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Re: help replace fridge evaporatot

I had a similar problem with an isotherm SP fridge system - manual attached
The evaporaoir stopped cooling even though compressor was running. Also, it ran low amps (<2A).

I purchased a refrigerant sniffer from Amazon, and found the leak. It was a large hole in the tube to the evaporator, caused by fretting where the tube (unprotected!) passed through a bulkhead.

My isotherm system has what I think is a pair fairly standard couplings on the evaporator tubing that allows easy installation of a new evaporator and tubing, without having to drain the compressor of refrigerant.

I bought a new evaporator from https://coastalclimatecontrol.com/ for about $200
From Harbor Freight I bought a refrigerant vacuum pump ($90) and , and a can the appropriate refrigerant from Walmart

Note: standard automotive fittings do not suit the Danfoss compressor.
I used a gauge/manifold/adapter system to connect
The unit is longer sold by HF, but is similar to this on Amazon
https://www.amazon.com/gp/product/B0...6SRZN4Q4&psc=1

Installation was easy - the coupling require wrenches. I made sure that the tubing isprotected where it goes through walls.
I used the vacuum pump to pull air out of the system overnight, and added refrigerant until the compressor pulls the correct amps.
That was 6 months ago, and all is well.

If you are located near Kemah, TX you're welcome to use my pump & adapter
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Old 15-08-2020, 12:49   #5
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Re: help replace fridge evaporator

I didn't attach the manual properly - 2nd try!
Attached Files
File Type: pdf SP System OEM Manual.pdf (630.9 KB, 48 views)
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Old 16-08-2020, 19:29   #6
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Re: help replace fridge evaporatot

I really liked the evaporator on my freezer system but the danfoss compressor rusted through and leaked. I decided to buy a new system (Frigoboat) and adapt it to my old evaporator. I was happy for about a month. evaporator failed.
Do yourself a favor and replace the whole system. I am very happy with both my systems after 3 years.
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Old 17-08-2020, 04:20   #7
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Re: help replace fridge evaporatot

Best to replace the whole system, as the newer designed compressors are much more effeciant than the old design, AND the new designed electronic module, which is the brains, is much more effeciant as well, as it senses the voltage, and takes advantage of it, also the new unit's when starting, slowly ramp up, so the unit doesn't get hit with max voltage, causing burn out's, common with the ilder unit's, the modul's costing in the hundred's, on top of it all, it isn't easy to charge, as it only takes a few gram's, very easy to over charge, the new system is pre charged, so, plug and play.
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Old 17-08-2020, 06:49   #8
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Re: help replace fridge evaporatot

Quote:
Originally Posted by arch007 View Post
I have an isotherm fridge.

its old. thinking of just replacing the ecaporator as compressor and control works.

this is the water cooled model.

question.

maybe moisture in other components will damage evaporator.

should I just replace everything ?

question.

how do I go about replacing ?

run compressor inject refrigerant then remove old evaporator ?

thanks
The first thing you must do is Identify your problem, Why do you think there is moisture in evaporator especially if compressor runs. I would recommend adding refrigerant till unit is drawing 5 amps and then look for refrigerant leaks including bubbles around SP condenser. That compressor does not operate if seawater has contaminated compressor or Flow control orifice.
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