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Old 16-01-2013, 03:00   #1
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Join Date: Oct 2010
Location: Perth west australia, Indian Ocean
Boat: Samson C-Falcon 41'9" composite ketch (designed by Cece Norris)
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Service For Danfoss Compressor?

hi I have a small danfoss compressor and plate which have been standing for 3 years. should i take it out nd service it before starting it up?
what service might it require? regas?
can i do it myself?
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Old 16-01-2013, 03:43   #2
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Re: Service For Danfoss Compressor?

It should be okay to start it up.

After about 10 - 20 minutes, the plate should start to frost up from one side. Over time, the frosting will progress to the other side. If it does not frost up, ie only water droplets appear on the plate, then you need to have it re-gassed.

Somewhere on the compressor, it should state what sort of gas is being used. It will either be R12 or R134a. R12 is that nasty stuff that creates holes in the ozone. It is possible to re-gas it yourself but there are a few tricks eg you must ensure that no moisture gets into the system by purging the gauge manifold pipes. If you over-gas the system, you risk damaging your compressor. Re-gassing takes time because temperatures and pressures change as the system starts performing, so small adjustments to the gas pressure need to be made every 30 minutes or so.
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Old 16-01-2013, 06:06   #3
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Re: Service For Danfoss Compressor?

Shanaly, Turn refrigeration unit on, if compressor will not run it is because of an electrical problem. It compressor runs and there is no cooling in 20 minutes it is because of a refrigerant problem.

If compressor runs for more than one hour and refrigerant charge is correct evaporator will have a thin layer of frost covering 80% or more of its surface area and no frost on line outside refrigerated area. If you have need to add refrigerant make sure you only use the same refrigerant that is in this Danfoss BD compressor. Currently there are no frendly refrigerants approved by Danfoss other than what is in your system now.

You will find three long section on my web site dealing with Danfoss refrigerant, Servicing, Too much refrigerant and Too little refrigerant.
Kollmann Marine
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compressor, service

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