Heat Sensors and Micro Switches

[BurnetteHoods]

Hello,

I have a Kitchen Exhaust Hood that an "electrician" tried to wire and has a disaster.
Basically, I have 2 motors, 2 on/ off switches, 2 micro switches, and 1 heat sensor.
When the heat sensor is activated, motor 1 needs to turn on regardless if the switch is turned on or off.
When Micro switch 1 is activated, motor 1 needs to turn on, regardless of the switch position.
When Micro Switch 2 is activated, motor 2 need to shut off.
When the Micro Switches are not activated, the switches should operate normally.

Its my understanding a contactor is needed for the micro switches to activate the motors?
I have a drawing made if anyone is interested, i can email it to you and you can draw what is needed.

 

[BurnetteHoods]

The Fire Alarm should also turn on when either Micro Switch is activated.

 

[Marvo]

I'm a bit confused about the intended sequence....

How are the microswitches operated? Also you say microswitch 2 must shut down motor 2 but what condition turns motor 2 on?

 

[BurnetteHoods]

I'm a bit confused about the intended sequence....

How are the microswitches operated? Also you say microswitch 2 must shut down motor 2 but what condition turns motor 2 on?

The micro switches are activated by a mechanical lever actuating and pushing the micro switch when a cable is released from a fusible link melting.

Motor 2 would be turned on and running from on/off switch. The switch would need to be in the on position but the micro should turn the motor off.regardless.

 

[Marvo]

Okay, so both motors are manually started and stopped by on/off switches.
Motor 1 must auto start via a heat sensor microswitch regardless of the manual on/off switch setting.
Motor 2 must auto stop via a second heat sensor microswitch regardless of the manual on/off switch setting.

Is that correct?

 

[James]

this is not a job for an electrician, your fire alarm company should be providing details about how this should be integrated to your fire alarm.
they may provide a specification or just quote to do the work.

I presume the extractor and other equipment has been specified because of a specific risk assessment.