Adding air handler to minisplit: is there an isolation valve??

Discussion in 'HVAC Heating & Cooling' started by Theodore, May 26, 2020.

  1. Theodore

    Theodore Member

    Joined:
    Sep 18, 2015
    Location:
    New York
    Hi. I have a SeaBreeze mini split heat pump, model SMZ42H46ZOGX. It has 5 ports in total, and I currently have 4 in use. I’ve recently prepared the last indoor air unit for the 5th and final port to be connected. I’ve gotten a couple of quotes from HVAC folks for the connection, but they seem to disagree with one critical item: first company says they can connect the last unit without evacuating the entire system because they know there’s an isolation valve in the unit to isolate the final line we’re adding, while second company says there is no isolation valve in the unit and they have to remove all the refrigerant in the system and reinstall after the final air handler is attached. Cost was higher for the guy who said he has to evacuate the system.

    I didn't see anything obvious to me (as a non-HVAC person) when I looked inside the outdoor unit, and I’ve studied the only manual I can find:

    http://www.irproducts.biz/support/parts-manuals/file/6536-smz42h46zogx-service-manual?start=20

    but not sure if there is an actual isolation valve in there for each port. Wondering if anyone can flip through this manual and advise with certainty?

    Many thanks

    Theodore
     
  2. Stuff

    Stuff Well-Known Member

    Joined:
    Mar 7, 2013
    Location:
    Pennsylvania
    Manual shows only two stop valves for the 5 zone system. Take a look where the lines run it/out of the unit. Do you see caps next to each line? Post a pic.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Theodore

    Theodore Member

    Joined:
    Sep 18, 2015
    Location:
    New York
    Photos, as suggested.


    IMG_8284.JPG IMG_8285.JPG IMG_8284.JPG IMG_8285.JPG IMG_8286.JPG IMG_8288.JPG
     

    Attached Files:

  5. fitter30

    fitter30 Active Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    Looks like there is only two sevice valves so charge has to reclaimed, leak tested, evacuated and charge weighed in.
     
Similar Threads: Adding handler
Forum Title Date
HVAC Heating & Cooling Adding a Manifold Mixing Station Nov 12, 2018
HVAC Heating & Cooling Adding radiant heat to existing hydronic baseboard heating Apr 16, 2018
HVAC Heating & Cooling Adding C to my Nest thermostat Jun 24, 2017
HVAC Heating & Cooling Adding a C wire to my 2 wire thermotat Mar 20, 2017
HVAC Heating & Cooling Adding a Zone to a Boiler Jan 9, 2017

Share This Page