You should be getting direction from the design professional about how they want it wired as respects to whether they want the fan(s) and make-up air to run or fans only etc. Sometimes they want the fans to draw the fire suppressant up into the stack. Sometimes they want all air circulation to stop, including bathroom exhaust fans. The wiring method might not be called out but the NEC covers that. The interlocks are important. Typically the equipment under the hood gets gas and electric turned off and the fan(s) continue to run along with the MUA.