Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Honeywell zone valve

simba
simba Member Posts: 18
in Gas Heating
Is there a harm to unhook the out spring of Honeywell zone valve in order to eliminate water hammer in one zone.
Thankyou

Comments

  • Derheatmeister
    Derheatmeister Member Posts: 1,581
    It would most likely result in a uncontrollable zone associated with it..
    Most of the times a waterhammer is due to:
    1. Pumping against the Zone valves intended Flow direction.
    2. A loose pipe.
    3. Overpumping.
    Some Zonevalves such as the Taco 571 or Caleffi 676 series are slow opening valves which may help with this situation..


  • HVACNUT
    HVACNUT Member Posts: 6,338
    It's the spring that makes it close. It only gets power to open. 
    There are other valves out there that close slower.
  • simba
    simba Member Posts: 18
    Thanks for the quick reply. So i unhooked one of the outer spring and now i can see the valve closes a bid slower and the noise went sway. Can i leave it like this for now and take care of it in the spring. Does this harm my boiler. Thank you
  • HomerJSmith
    HomerJSmith Member Posts: 2,635
    Yes & no.
  • Derheatmeister
    Derheatmeister Member Posts: 1,581
    simba said:

    Thanks for the quick reply. So i unhooked one of the outer spring and now i can see the valve closes a bid slower and the noise went sway. Can i leave it like this for now and take care of it in the spring. Does this harm my boiler. Thank you

    It is probably piped in reverse direction..
  • hot_rod
    hot_rod Member Posts: 23,405
    The springs determine the close off pressure of the zone valve. If it is an 8 Cv valve, the most common, it has a 20 paid shutoff. Disconnecting one spring reduces that close off, so depending on the circulator delta P, the valve may not close tightly. Swapping one problem for another. Check the temperature a few feet away from that zv, if its hot, the valve is leaking past

    over pumping is the most common cause of hammer. A delta P circulator is ideal for multi zoned systems, as it adjusts flow according to the valves open.  And saves 50% or more on electricity 
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    HVACNUT
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,601
    Removing one of the springs is a widely used trick in the field. It usually gets rid of the hammer on closing. 
    Retired and loving it.
  • Tim McElwain
    Tim McElwain Member Posts: 4,642
    Dan is correct I have been doing it for years and no harm done. I have been directly or indirectly involved with this industry since I was sixteen and now I am 82. If there had been a problem with me doing it I would have heard about it by now.
  • hot_rod
    hot_rod Member Posts: 23,405
    Wonder why they still put two springs on? To bad the HW engineers don’t hang here😗
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    SuperTech
  • nathandclements
    nathandclements Member Posts: 12
    What exactly IS water hammer, and what is happening to cause it when the valve closes? I have a terrible banging sounds I'm trying to solve. If happens almost every time the system cycles. I thought it happened on valve open, but now I'm wondering if it's actually happening on valve close. I have noticed that if I leave the thermostat cranked all the time, it doesn't do it as bad or as much.

    Here's a link to my post about it: https://forum.heatinghelp.com/discussion/187411/obnoxious-banging-constant-bleeding-info-overload#latest
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,601
    Here's an old story about all of this:
    https://heatinghelp.com/systems-help-center/banging-zone-valves/
    Retired and loving it.

Categories