Commercial Salmon Trolling Forum

Cold Plate Refrigeration

Troubleshooting, repair, and how-to's related to marine systems.

Cold Plate Refrigeration

Postby Easy II » Sun Jun 07, 2015 6:40 am

I purchased a salmon troller last year that has a cold plate refrigeration system in the ice hold. This system was not put in with the intent to be a Freezer, only meant from what I have been told to hold the ice over longer and with better consistent temperature. I have been struggling with the water circulation the past year but believe I am soon to have this working properly. Next I have to recharge the system as I am sure the freon will need to be recharged. That said the two gauges are holding pressure in the system when off, and the system has not been run for over 10 years. Might be a spit in one hand and wish in the other and see which fills up first but an hopeful to get this up and running this years. I have a compressor, condenser, pump, sight glass, cooling grid, (probably not the right terms), on the system and the cooling is from sea water that circulate around the cooling manifold/grid.

Each plate appears to have a valve leading into it or a regulator. I have four plates approximatley 9' by 3' in dimension.

Looking for any insight, other than the obvious......of take it out ......to maintain it an trouble shoot anticipated start up problems or lessons learned.

Thanks for any help or suggestions all will helpful and help me learn.........Ocean is a blowing up down here in southern Oregon!
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Re: Cold Plate Refrigeration

Postby dellori3 » Sun Jun 07, 2015 7:38 am

This comes under the “if it ainin’t broke, don’t fix it category” It is an old Tec system and most likely has very expensive refrigerant in it. Look on the top of the expansion valve and it may indicate what refrigerant is in the system. White=R 12, green= R 22 purple=502 another way if you have a pressure temp chart is look it up the pressure that corresponds with the ambient temp with the system off. In any case it is very hard to trouble shoot a system you can’t see.
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Re: Cold Plate Refrigeration

Postby Disperser » Mon Jun 22, 2015 2:50 pm

Cold plate is very efficient, I highly reccomend finding a manual or paying an expert to teach you how to maintain it. If you dont want the system, I will happily uninstall it for you...
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Re: Cold Plate Refrigeration

Postby Easy II » Fri Jul 03, 2015 8:05 pm

Got water.cooling flowing again now need to understand compressor last time I turned it on the compressor got very hot
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2015-07-03 21.59.55.jpg
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Re: Cold Plate Refrigeration

Postby Easy II » Sat Jul 04, 2015 5:32 am

More photos
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2015-07-04 07.25.06.jpg
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Re: Cold Plate Refrigeration

Postby Easy II » Sat Jul 04, 2015 5:35 am

More photos
Attachments
2015-07-04 07.24.05.jpg
2015-07-04 07.25.48.jpg
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Re: Cold Plate Refrigeration

Postby Easy II » Sat Jul 04, 2015 5:41 am

So I have limited knowledge of what the items are called and what they actually do to make system work and what I should be looking for to check that they are working properly I know there is a sight glass.and when I started compressor last time it appeared.to be bubbly.at.first then fluid constantly appeared.to be flowing in a steady stream any information is appreciated I will take photos of the plates.when I ice up today to head out
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Re: Cold Plate Refrigeration

Postby Easy II » Tue Jul 14, 2015 4:21 pm

System up and running.thankyou to those who helped.......
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