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Thread: Cryogenics -80
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08-06-2013, 08:12 AM #1
Cryogenics -80
Hi can anyone help i need to find out the refrigerant charge as the unit that a compressor change,the refrigerant says mixture and amount of 0.260 Grams.I have spoken the the uk importer and he has no info on.
Its a single stage unit that only needs one compressor with two circuits (like a cascade system)
Unit detail
Make-zhongke meiling cryogenics
Model-DW-HW50
Ps i have removed the refrigerant which has a smell of propane
Could i use R508b ?
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08-06-2013, 05:27 PM #2
Re: Cryogenics -80
r290,r600 mix or 5o8b usually -80 kit is 2 stage cascade- 404a for high stage
no nameplate on the cabinet?
last resort check with manufacturers as if it doesnt work its gonna take ages to get to temp
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08-06-2013, 08:12 PM #3
Re: Cryogenics -80
Propane keeps the oil flowing, it'll need a small amount from vacuum, maybe only a gauge line full. Recommended charge and type of refrigerant is vital, don't guess at -80. Sounds chinese so god only knows what was in it originally.
alecMostly found in the southern part of this green and pleasant land.