Replaced a Bristol 5 TON on an older Carrier Infinity system with a Copeland Scroll 2-stage ZPS51K5EPFV800 without issue, until it tried to switch to low stage and I received Low thermal and low comp cutout codes. It's important to make sure your leads from the rectifier plug meet the correct destination, as in this case, otherwise you may be working out some bugs. This is tedious when everything else checks out well. Nice video!
Hey I need some help. I have Copeland two stage compressors on my Geothermal unit. Unit was installed 10 years ago. Recently my unit had a short. I found out that my second stage solenoid is grounded. Here is a part number of my compressor ZPS51K4E-PFV 230V. So now it’s only works in the first stage. Please tell me for how long it can last. Can it last 1 more year or 10 more years? Thank you so much!
Trevor, a chemical engineer here trying to understand a little about two stage scroll compressors. One of your Two Minute videos, "Copeland Digital Scoll Compressors," did a good job explaining compressor unloading where the compressor pumps nothing when unloaded. (A 10-year-old Emerson/Copeland video showed a digital scroll drawing 5.6 amps loaded and 3.8 amps unloaded.) Are you saying these ZPS compressors still pump 65% of their capacity when unloaded and do not have to modulate every few seconds when unloaded? If so, please compare amp draw loaded versus unloaded. Thanks!
Well some models are 67% and some are 65% but yes your power consumption will be less when in the unloaded state. Yes It will only change from loaded to unloaded state when there is a capacity call, like from a 2 stage thermostat and not PWM. Pulse width modulation like the digital. You can see the energy usage in Copeland mobile loaded and unload states of ZPS compressor. Check it out.
@@char0507 I think you can find the answer in here to test the rectifier www.copeland.com/documents/ae-1423-1-5-to-5-ton-zps-k6-copeland-scroll-two-stage-compressors-en-1592302.pdf
Great info. I have a Trane XR system which had a rectifier to control the compressor solenoid valve. The system uses a regular thermostat (no Y1 and Y2). Will it work?
Hello Trevor, According to the Table for R410a the Critical Temperature is 165°F. If the gas Condensing Temperature is 120°F / 419psig, will the CUT-OUT pressure at 650psig not too high that it would destroy the Compressor? However from the Refrigeration and Air-conditioning book, the cut out pressure is put at 50psig above condensing pressure
Toyin, yes that is the critical temperature which means there will be no pressure-temperature relationship above that point. You will have to look at what the high-pressure cutout should be set for in the compressor installation manual of the specific manufacturer. R410a high-pressure cutouts are usually set for 650 psi with a manual reset but always refer back to the compressor manufacture. Here is the manual for the 6-12 ton 2 stage Copeland scroll manual webapps.emerson.com/online-product-information/Publication/LaunchPDF?Index=AEB&PDF=1428
@@RefrigerationMentor ah. Yes. Based on the fact that it does not mention internal pressure relief as do the documents for the ZP*k5 series and mentions external low and high pressure cut offs, I am guessing it does not
@@TheRealoldcar Follow up with Copeland I am sure I have cut a few ZPS ultratechs open and I believe they had the IPR. Not sure about he K6's. Let me know what you find out.
Worst failure rate of a compressor ever across the board not manufacturer dependent Solinoid failing,discharge gas leakage into body low compression you name it
