Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

A/c troubles

Pretty new to working on big commercial equipment most worked on residential equipment.Have a 20 ton 2 stage condensing unit with two 10 ton evaporators. It has a common circuit branching into the two evaporators two txv and one liquid line solenoid valve. First stage compressor is coming on and pumping into the two evaporators at once.

Not 100% sure but shouldn't the evaporators be stage with compressors? If one compressor is running should it only be feeding 1 evap?

Comments

  • TechmanTechman Member Posts: 2,144
    edited June 2010
    staging

    Could be, may be, might be, it kind of depends on the mfg's specs.What is this system cooling off ?Make ,model?Also,I think,that I think that both compressors might have to come on /off together to prevent on oil hogging issue.Is there an oil equilizer setup on the comps?Just like on a refrigeration rack!
  • Empire_2Empire_2 Member Posts: 2,343
    Your used to do this.

    York used this set up a while back.  The idea is the common suction is designed to bring on 50% of the total capacity under, usually non peak loads.  Kind of like an unloader.  Oil migration was never a problem as far as I could see. 



    Mike T.



    Hey Terry?
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!