Results 1 to 13 of 13
Thread: Compressor replace
-
24-08-2006, 11:56 AM #1
Compressor replace
Hi experts,
I have MBP hermetic compressor (Emraco J9226GK)
It has evaporating temperature range from -20C to +15C
Can I replace it by LBP compressor (Danfoss SC21CL),which has evaporating temperature range from -45C to -10C ?
Or I have to select HBP compressor (L'Unite Hermetique
CAJ 4517Z),which has evaporating temperature range
from -25C to +10C ?
All compressors for R404A.
What do you mean about compressor manufactures
Embraco
Danfoss
L'Unite Hermetique
Elektrolux
Thanks for any advice.
-
24-08-2006, 01:09 PM #2
Re: Compressor replace
Whats the application
What is the cab temp you trying to achieve?
-
24-08-2006, 01:55 PM #3
Re: Compressor replace
Hi Abe
Integral multideck cabinet should supply temperature
from 0C to +7C
-
24-08-2006, 04:14 PM #4
Re: Compressor replace
Go with the HBP. fitting the LBP on that unit is an invitation for a burnout.
Takes a licking, keeps on ticking.
-
24-08-2006, 05:01 PM #5
Re: Compressor replace
Originally Posted by slingblade
-
24-08-2006, 06:07 PM #6
Re: Compressor replace
Originally Posted by slingblade
I ponder to think the main difference is in the compression ratio and possibly motor differences and providing a decent S.H will normally be ok.
Of course the correct thing would be to go HBP but sometimes life can be difficult...
Cheers
Richard
-
24-08-2006, 07:14 PM #7
Re: Compressor replace
Originally Posted by rbartlett
Seems Foster have the same unit for chill and deep freeze, they just change the gas to suit
If your LBP compressor is R404a, you could run it on R134a for a MBP or HBP application.
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
-
24-08-2006, 07:14 PM #8
Re: Compressor replace
Whats wrong with the MBP?
-
24-08-2006, 07:36 PM #9
Re: Compressor replace
Originally Posted by Andy
http://www.pkl.co.uk/foodservices/coldrooms.asp
and they were a coldroom or freezer by swapping power from one eliwell controller preset at +1 to another preset at -20 deg c ....
Cheers
RichardLast edited by rbartlett; 24-08-2006 at 07:38 PM.
-
24-08-2006, 08:09 PM #10
Re: Compressor replace
i think he,s saying his MBP pots dead and wants to use a LBP,even if its a cappilary system it will expire in no time,as the guys advise you,go HBP with start capacitor,andy thats intersting about that foster freezer,must have been a friday afternoon job, was it hot gas defrost aswell? bet it grunted a bit if it was.
-
24-08-2006, 09:02 PM #11
Re: Compressor replace
Originally Posted by rbartlett
I to have worked on dawson rental boxes which will work chiller or freezer at the flick of a switch. the biggest factor here is they are designed to do just that. a crank case pressure regulator stops overloading during pulldown, after defrost termination or higher temp. operation especially in high ambient conditions. 404A multidecks are not quite the same, think back 3 or 4 weeks to the sweltering summer we experienced. air on evap. 25/35 deg c. 404 can run nasty discharge temps at the best of times but on an open fronted unit in those conditions, it begs burnt oil blocked capillarys and premature failure.
lets face it, how many of us have had burnt fingers from touching a running compressor to check how cold it is?
We bought a cold room off Foster for -22 deg c. It came with R134a and would not pull lower than -13 deg c. Wwe changed the gas to R404a, the compressor was suitable for the pressures, room flew down and never looked back
Seems Foster have the same unit for chill and deep freeze, they just change the gas to suit
Just my thoughts,
regards all.Takes a licking, keeps on ticking.
-
24-08-2006, 11:07 PM #12
Re: Compressor replace
Originally Posted by old gas bottle
Was R134a on the plate, charge and all stamped. One of my engineers, decanted and recharged to the correct charge, again with R134a, still wouldn,t come down in temp.
I was on site, looked at it, compressor was R404a, the pressure switch for bringing on the cond pump was even set for 12 bar. I said to try recharging with R404a, as the compressor was fit for it.
The things a bloody blast freezer now
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
-
05-02-2009, 11:40 PM #13
Re: Compressor replace
Was R134a on the plate, charge and all stamped. One of my engineers, decanted and recharged to the correct charge, again with R134a, still wouldn,t come down in temp.
I was on site, looked at it, compressor was R404a, the pressure switch for bringing on the cond pump was even set for 12 bar. I said to try recharging with R404a, as the compressor was fit for it.
The things a bloody blast freezer now