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23-12-2009, 08:09 AM #1
Discharge pressure going very high in few seconds
system dischare pressure is going high and tripping in high discharge pressure with in 30seconds in aircooled chiller so request your help
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23-12-2009, 08:41 AM #2
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Re: Discharge pressure going very high in few seconds
Restriction in high side.
If you provide more data you will get more precise answer.
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23-12-2009, 08:58 AM #3
Re: Discharge pressure going very high in few seconds
As Nike said - restriction on HP side. Blocked check-valve?
Alternatively, if condenser fan stopped - no cooling. We see this in heat-pumps, if the condenser water flow is turned off, for instance.Engineering Specialist - Cuprobraze, Nocolok, CD Technology
Rarefied Technologies ( SE Asia )
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23-12-2009, 09:32 AM #4
Re: Discharge pressure going very high in few seconds
has it got a CPR fitted ?[crankcase pressure regulator],if it has try ajusting it to set the back pressure and that will in turn control the discharge pressure.if not fit one,obviousley dont restrict the overhall duty required.
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20-02-2010, 10:00 PM #5
Re: Discharge pressure going very high in few seconds
stating the obvious but check discharge service valve fully open also that air cooled condenser clear?
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20-03-2010, 11:52 AM #6
Re: Discharge pressure going very high in few seconds
nitrogen in system will have this affect
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20-03-2010, 12:27 PM #7
Re: Discharge pressure going very high in few seconds
^ Very much so.
Engineering Specialist - Cuprobraze, Nocolok, CD Technology
Rarefied Technologies ( SE Asia )
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20-03-2010, 03:16 PM #8
Re: Discharge pressure going very high in few seconds
condencer fans running ? righ way?
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20-03-2010, 05:11 PM #9
Re: Discharge pressure going very high in few seconds
30 seconds is a long time, partially restricted is more likely.
Too much refrigerant will get you high head pressure.
you did not supply any details on what your machine does and the operating and control procedure so trying to guess is like playing darts...
Please try to bring us a better picture of the system.
Photos always help.
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24-03-2010, 08:19 PM #10
Re: Discharge pressure going very high in few seconds
Chech to see if non condensibles are in the system.
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25-03-2010, 02:18 AM #11
Re: Discharge pressure going very high in few seconds
no question is stupid but how can you check if there are non-condesable in the system? Is there a trick, I would like to be enlightend and I am not sarcastic at all, ty.
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25-03-2010, 02:46 AM #12
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25-03-2010, 03:53 AM #13
Re: Discharge pressure going very high in few seconds
My wife used to say you never listen to a word I say at least I think that what she said
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25-03-2010, 01:29 PM #14
Re: Discharge pressure going very high in few seconds
Hi
Another trick with non condensibles is a portable purge unit.
We have 1 which we put on R123/R11 units to aid purging after nitrogen tests or units purge defective.
It is suitable to work on most refrigerants and is pre programmed in the software.
Depends on size of unit and access points available.
AWW
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26-03-2010, 06:44 AM #15
Re: Discharge pressure going very high in few seconds
More details on the system is better.It could be anything.Restriction,non condensible,lack of air flow etc.
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05-04-2010, 04:43 PM #16
Re: Discharge pressure going very high in few seconds
first of all you check your condenser it my be scaled. descaled it from descaler. if your condenser is water cooled then you can applay this mathod.
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05-04-2010, 05:57 PM #17
Re: Discharge pressure going very high in few seconds
Leave him guys, one of the so many who come here, asks a question and never come back.
I call this lack of elementary good manners.It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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06-04-2010, 01:13 PM #18
Re: Discharge pressure going very high in few seconds
Peter 1.. good one, just leave him guys.
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06-04-2010, 02:45 PM #19
Re: Discharge pressure going very high in few seconds
not operate fans, fan rotation correct?
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17-04-2010, 03:39 PM #20
Re: Discharge pressure going very high in few seconds
txv too closed on a critical charged system ?
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