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03-04-2012, 07:14 PM #1
Bitzer screw compressor type HSK 7451-80-40P
Hi / Dears
I have 2 Bitzer comp. one HSK & HSN the first -10 C : +40 C and other -35 C : 40 C . they have ECO connection . My question can i use the comp. type HSK in -35 C : 40 C too ?
Thanks friends
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03-04-2012, 08:03 PM #2
Re: Bitzer screw compressor type HSK 7451-80-40P
No!
Depending on the type of refrigerant used, from -10 to -20°C the compressor motor will not cool enough with the refrigerant, motor protector will trip.
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03-04-2012, 08:20 PM #3
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03-04-2012, 09:40 PM #4
Re: Bitzer screw compressor type HSK 7451-80-40P
definitly not ammonia as they are semi hermetics,
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03-04-2012, 09:42 PM #5
Re: Bitzer screw compressor type HSK 7451-80-40P
You can get all the answers you want from the manufacturer's site www.bitzer.de.
All manufacturers specify a minimum evaporating temperature for their compressors depending on the refrigerant and design (model).
You cannot use Bitzer semihermetic screws with R717 only the open type (OSK), are suitable.
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10-09-2012, 08:45 AM #6
Re: Bitzer screw compressor type HSK 7451-80-40P
as suggested above already the bitzer website offers an design tool with propper calculations. (also available as software to be downloaded)
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27-09-2012, 05:27 PM #7
Re: Bitzer screw compressor type HSK 7451-80-40P
I think also the coolpack software could help you on system analysis .