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  1. #1
    Join Date
    Oct 2009
    Location
    Mukwonago, WI
    Posts
    235

    automatically start a kitchen hood system

    What do you guys use? Captive Aire supplied a in-duct switch that closes at 85. It's a little pricey, i was looking for a less expensive alternative.

    Any suggestions?

  2. #2
    Join Date
    Jan 2008
    Location
    Lake Worth, FL
    Posts
    111
    Not s.ure exactly what you're referring to but usually I see just a simple on/off switch. You might have a control that turns the system on and off based on temperatures from cooking equipment that only runs when equipment is on. That would save utility money that would more than pay for the expensive switch

  3. #3
    Join Date
    Jan 2011
    Location
    Russellville, Alabama
    Posts
    26
    Have you thought about using a line voltage thermostat - like Johnson Controls? Don't know if it would be cheaper than your switch, but will definitely work.

  4. #4
    Join Date
    Apr 2010
    Location
    N. IL
    Posts
    8
    look into Melink Intelli-Hood systems or something along those lines, they use temp sensor(s) and a set of optics and a vfd to control it. easy to use and install. offers great money savings too

  5. #5
    Join Date
    Dec 2004
    Location
    Albuquerque, NM
    Posts
    104
    The hoods should be turned on when the equipment is started for the day. What exactly are you trying to accomplish?
    Mark

  6. #6
    Join Date
    Oct 2009
    Location
    Mukwonago, WI
    Posts
    235
    Quote Originally Posted by maninblack View Post
    The hoods should be turned on when the equipment is started for the day. What exactly are you trying to accomplish?
    IMC 507.2.1.1 states Type I hood systems shall be designed and installed to automatically activate the exhaust fan whenever cooking operations occur. The activation of the exhaust fan shall occur through an interlock with the cooking appliances, by means of heat sensors or by means on other approved methods.

    Currently we get a vulcan cal-stat from Captive Aire that is installed in the grease duct and turns the system on when it reaches 85. This item is a little pricey from Captive Aire and i'm looking for a more cost effective alternative. I'm just curious what other people use.

  7. #7
    Join Date
    Dec 2004
    Location
    Albuquerque, NM
    Posts
    104
    I would stick with what the manufacturer sells. That hood has a UL listing. I don't think NM goes by that code.
    Mark

  8. #8
    Join Date
    Aug 2004
    Location
    Des Moines, IA
    Posts
    76
    How bout heavy smoke and less than 85

  9. #9
    Join Date
    Jun 2004
    Location
    St Paul, minnesota
    Posts
    1,134
    Quote Originally Posted by Miller257 View Post
    IMC 507.2.1.1 states Type I hood systems shall be designed and installed to automatically activate the exhaust fan whenever cooking operations occur. The activation of the exhaust fan shall occur through an interlock with the cooking appliances, by means of heat sensors or by means on other approved methods.

    Currently we get a vulcan cal-stat from Captive Aire that is installed in the grease duct and turns the system on when it reaches 85. This item is a little pricey from Captive Aire and i'm looking for a more cost effective alternative. I'm just curious what other people use.
    here you can't use anything else unless you can prove it's ul listed for grease and high temp hoods. we had a couple of kitchen contractors install Honeywell remote bulb thermostats tied to relays. inspectors would not allow it.

  10. #10
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
    Posts
    4,201
    Quote Originally Posted by Miller257 View Post
    What do you guys use? Captive Aire supplied a in-duct switch that closes at 85. It's a little pricey, i was looking for a less expensive alternative.

    Any suggestions?

    The Captiveaire hoods I have worked on run all the time due to pilot flames maintaining a nice warm temp under the hoods. What a stupid set up.

    What did you end up doing?
    Some Talk, Some Do
    "keeping condensing pressures low and evaporator pressures high"
    Comfort is my goal
    Blog
    Web
    Facebook


  11. #11
    Join Date
    Jun 2004
    Location
    St Paul, minnesota
    Posts
    1,134

    Hmm

    if you have the standard captive UL listed heat sensor system with PLC'S just reset the control to a higher temperature so that hood MUA EXH only come on when main burners are on. ( personally I set mine at 115 degrees)

  12. #12
    Join Date
    Sep 2011
    Location
    Maryland
    Posts
    38
    Quote Originally Posted by ACFIXR View Post
    The Captiveaire hoods I have worked on run all the time due to pilot flames maintaining a nice warm temp under the hoods. What a stupid set up.

    What did you end up doing?
    The stat is adjustable

  13. #13
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
    Posts
    4,201
    Quote Originally Posted by Ovenguy View Post
    The stat is adjustable
    Thanks.............Now i can suggest that they be raised, 85 degrees is pretty low, the things run all of the time.

    Some Talk, Some Do
    "keeping condensing pressures low and evaporator pressures high"
    Comfort is my goal
    Blog
    Web
    Facebook


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