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Ventahood fire suppression systems

I have to wire a ventahood fire supression system control panel (control head) so that the exhaust fan comes on in case of fire and basically all other circuits under the hood are shut off. The ones being shut off would include a supply fan the lights under the hood and the receptacles under in approximate vicinity of the hood, All the cooking appliances under the hood are gas which will be shut off mechannically. If possible, could you please supply me with a electrical and a mechanical diagram for the electrical and gas shut off. Basically I need to know how to wire the microswitches and to hook up the gas shut off
thank you
Russell Robbins

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  • Restaurantin Jul 07, 2008

    the resstaurant that i have taken over has no relay in the electrical box that makes the whole ting work where can i get the relay and can i do it myself

  • Anonymous Aug 15, 2008

    I need to know how the fire cutt off is wired between hood lights,plugs and supply air with 2 pole contactor thru micro switches in ansual system


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I went to greenheck by google,

It helped.

Posted on Sep 30, 2008

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The wiring has to go to the microswitches
you can add up to three micro switches,they are located in the control box
there colors should be bl,brown and red
look for nc or no(you can depress the switch by hand to see when you press itup it shuts power
it has to be repeated for the light,plugs and make-up air
to pass inspection when you press up on switches the have to shut off electric lights and make up air
you dont need a relay.
the basic system is a contactor line and load runs exhaust and make up air power in power out.
you need power just for the contactor to pull in.
you need to add a switch break hot on contactor power

Posted on Aug 23, 2008

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The micro switches have a common hot/normally open&normally closed.The way we install the system is with contactors .Landing the line and load on the contactor lugs and powering the coils with the n/o or n/c side of the micro switch . exhaust turns on and make up air,all electrical and gas shuts off.

Posted on Sep 17, 2009

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