Results 1 to 6 of 6

Thread: Limit switch

  1. #1
    Join Date
    Sep 2004
    Posts
    67
    I need a limit switch that opens when it reaches a predetermined temperature. I currently have one that operates at 130 degrees F. I would like one that opens at a lower temperature. Do they make them?

    This switch is for opening a combustion air damper for my water heater.

    North

  2. #2
    Are you a tech? I don't think so cause any body with HVAC education would not try to redesign a gas fired appliance.

    I'm sorry but the forum rules forbid giving instruction to anyone not in the HVAC business.

    And what you ask for is dangerous.

  3. #3
    Join Date
    Aug 2001
    Posts
    1,936
    wont it screw up the efficiency of the heater

  4. #4
    Join Date
    Mar 2004
    Location
    SE Michigan
    Posts
    17,895
    There is a flush mount fan or limit control. 70-160 deg. range with a 25 deg. fixed differential. Its made by white rogers.

    In addition, there are snap disc thermostats with a 90-130 deg. range SPST.
    " Kill a Commie for Mommy! "

    - Colonel David Hackworth (1930-2005), Korean War Vet

  5. #5
    Join Date
    Sep 2004
    Posts
    67
    Curry,

    I am not trying to redesign a gas fired appliance I am merely trying to get it some combustion air.

    I have a 6 inch combustion air intake already installed as per code with a motorized damper on it interlocked with the furnace. CSA approved by the way.

    I just want to utilize the combustion air that is already available to my furnace for my water heater. Get someone to loosen your wraps a little bit..........LOL!

    No harm in bringing in a little fresh air when the water heater fires as far as I can see..........tech or not.

    As for your comment about not giving information out to those not in the HVAC business.............read the majority of the posts. Quite a bit of advice is given out daily to diy's and home owners.

    Coolwhip.........thanks, I will hunt down a 90 degree. I thought there must be but "NOT BEING IN THE BUSINESS" I thought I would let my fingers do the walking. LOL!

    Edmond.......how would it screw up the efficiency of the heater??

    North

  6. #6
    Originally posted by northof49
    As for your comment about not giving information out to those not in the HVAC business.............read the majority of the posts. Quite a bit of advice is given out daily to diy's and home owners.


    Welcome to HVAC-TALK.

    However the help that the general public receives is suppose to be general information and advice on decisions. The rule is there to limit giving out technical advice to the DIY that may cause harm to them or the people around them.

    I included a link to the Rules (below) that state this. Thanks for your understanding.

    (we can't help DIY, due to site rules )

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event