Results 1 to 8 of 8
Thread: Sub Cooler
07-05-2012, 09:31 PM #1
How do you determine if a sub-cooler is bad on a rack? Alarm set point is above 80 degrees. When I got there was reading 91. Being feed from med. temp. rack with a sport. Backed sport all the way out to rack pressure and turned in the manual stem in the liquid solenoid valve. TXV seemed to be feeding. Suction comming from med. temp. rack was hot and would never get cold after about an hour. I suspect the heat exchanger has a leak in it but not sure, how can I verify? Or is the TXV not feeding? Help !!!! Both racks are R22 Luckly if the sub cooler is bad!
07-05-2012, 10:12 PM #2
TXV seemed to be feeding.
I suspect the heat exchanger has a leak in it but not sure, how can I verify?
Suction comming from med. temp. rack was hot and would never get cold after about an hour.
Now, to FIX this thing.
What type of subcooler? If it is one of those tube in tube types, stop right now and don't waste any more time. They just don't work.
If it's a brazed plate style HX, first, verify proper liquid to the unit, check the power element and see what you find.
07-06-2012, 04:23 AM #3
I'll have to peel the insullation off of it today to see what type it is, and check the superheat on the TXV. I'll post back tonight, thanks JP !
07-06-2012, 05:53 AM #4
07-08-2012, 02:57 AM #5
Don't over complicate things. Set the SPORT valve on the subcooler suction to +35 SST (in most cases). Check the superheat of the subcooler TEV(s). Then go from there."Don't wish it were easier, wish you were better"
07-08-2012, 03:17 AM #6
07-10-2012, 12:16 AM #7Regular Guest
- Join Date
- Apr 2011
- Palmdale ca with my brothers
You sure the rack being sub cooled has enough gas?? If the rack is short you wont get temp. Also what about the rack that is feeding the subcooler, is it short on gas??
07-11-2012, 12:34 AM #8
bringing receiver levels up solves many a subcooler issues.