View Full Version : Why EPRs on a distributed system??
06-16-2009, 08:05 PM
A store I service is having a remodel and installig an Edge Zero Zone distributed system for low temp. It has 2 suction groups -10 & -23. They are installing epr's with suction stops . The controller has temp sensors that also control the temp through the stop. Why not use a LLS, eliminate the epr and run at suction group setting?? I/C doors, W.I.F. Frozen Food doors.:confused: I thought the idea behind a distributed system was to use short piping runs and operate off of the suction setting. Comments?
06-16-2009, 08:18 PM
Possibly to achieve longer compressor run time? The temp. control may be a backup control.
06-16-2009, 08:20 PM
The txv will close upon rise of the suction pressure. That will enable you to defrost the case and not pump the circuit down. If you put a lls in the system, you are going to continue to cool the case while you are trying to defrost the coil.
Also using a epr/suction stop will allow the load to be distributed to where it is needed, making the system more efficent.
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.