1. Welcome to Hvacproforums, an interactive community exclusively for HVAC professionals. The collective years of HVAC experience and the knowledge our forum members share make this an invaluable resource for those in the HVAC industry. We have a lot of fun, but make no mistake, we are pros. Hvacproforums is self supporting ...there are NO advertisers here. Do-it-yourselfers and Homeowners are encouraged to seek information elsewhere. Those involved in the HVAC industry are urged to register. its 100% free and easy, Once registered you will have access to the technical forums, Be sure to click over to the new members forum and introduce yourself after registering!

Unit heater Killswitch

Discussion in 'Commercial' started by Anita sannich, Oct 30, 2017.

  1. Anita sannich

    Anita sannich Exceptionally average

    Messages:
    554
    Location:
    Spokane WA
    I'm working on installing a unit heater in a warehouse and they want the unit heater to shut off whenever the bay door opens, what's the best way to go about that? I was thinking maybe just a simple relay with the coil energized when the door opens and the NC contacts be on the RW for the thermostat
     
  2. Joeysmith

    Joeysmith New Member

    Messages:
    115
    Electric opener on the door? Some of them have extra contacts for that type of stuff. If not a simple micro switch mounted somewhere to make/break contacts when open/closed. Be less wires.
     
  3. pecmsg

    pecmsg Junior my ASS

    Messages:
    21,174
    Location:
    Eastern LI
    As Joey said the closure should have a end switch.
     
  4. pecmsg

    pecmsg Junior my ASS

    Messages:
    21,174
    Location:
    Eastern LI
    Or a magnetic switch on the door.
     
    Anita sannich likes this.
  5. Chuck

    Chuck SSP

    Messages:
    7,913
    Location:
    LAX
    Yes break r and w. If you let an electrician do it he'll break power to the heater then it will trip high limit
     
    LemonWizard and Rather B Riding like this.
  6. Anita sannich

    Anita sannich Exceptionally average

    Messages:
    554
    Location:
    Spokane WA
    Didn't get to finish this one, when I asked another tech which supplier might have a door switch for a garage door, he promptly took over. Thanks anyway guys.
     
  7. pecmsg

    pecmsg Junior my ASS

    Messages:
    21,174
    Location:
    Eastern LI
    Then HE owes us BEER!
     
    Anita sannich likes this.
  8. Zman

    Zman Hanging by a Thread

    Messages:
    1,014
    Location:
    The "I know a Guy" State
    That ain't Right! Who is He, the Company Butt Smoocher? Tell your Boss you want to finish your own work,so you can be a better tech. I hate company know it alls,who don't care if they make someone look bad just to make themselves look good. Hopefully he screws it up and you have to go back and straighten it out.
     
  9. frozensolid

    frozensolid Psychologist's Dream

    Messages:
    12,284
    Location:
    Earth
    If no closer a proximity switch would be the simplest way to achieve your goal.
     
  10. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,780
    You just hire a midget butler to stand there and flip the switch every time the door opens or closes. Simple.
     
  11. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,780
    I suspect they'd be better served by radiant tube heating. Much more efficient and effective near large overhead doors that open frequently or even infrequently.
     
    LemonWizard and Anita sannich like this.