R22 - 407 gas change
R22 - 407 gas change
(OP)
We have recently changed our gas charge from R22 to 407. This is on a fairly small (15 kw) seawater cooled glycol chiller.
The system seems to struggle and with the seawater cooling side running less cold than it used to (32 degrees C seawater) we are having trouble getting the glycol really cold .
Generally no less than 10 degrees C.
Can anyone tell me what the difference is in efficiency is between the two gasses ?
Also would there be any change in expansion valve settings?
Im not to hot when it comes to refridgeration but I know the basics.
Thanks in advance.
Neville
Scotland
The system seems to struggle and with the seawater cooling side running less cold than it used to (32 degrees C seawater) we are having trouble getting the glycol really cold .
Generally no less than 10 degrees C.
Can anyone tell me what the difference is in efficiency is between the two gasses ?
Also would there be any change in expansion valve settings?
Im not to hot when it comes to refridgeration but I know the basics.
Thanks in advance.
Neville
Scotland





RE: R22 - 407 gas change
When you state you changed the refrigerant, what do you mean by that? Did a qualified refrigerant mechanic do the change? Did they discuss the fact that the chiller may not perform the same with a new refrigerant.
My advise, hire a COMPETENT chiller contractor who can discuss the differences in performance of R22 and R407
Cvanoverbeke
RE: R22 - 407 gas change
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RE: R22 - 407 gas change
RE: R22 - 407 gas change
The HP side is at present 18 Bar which is alot higher than these compressors like to run (bitzer).
Our problem is at present we are offshore vietnam and this system is in use - it forms part of our dive ships life support system for the divers.
I think the best short term measure is to fit new larger seawater condensers at our next port call. If there is still a problem I may fire the R22 back in and await the original contractor to sort the mess out !
Cheers
Neville
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change
RE: R22 - 407 gas change