Okay, since you have no make-up air, you can use just one microswitch (m/s) for everything. You'll want a 2-pole contactor for the exhaust fan, and you can use a one 2-pole or two 1-pole contactors for the two 120v circuits as well.
Look at the lower diagram. C = common, N = normal, E = emergency. Instead of a horn/strobe, you would have the exhaust fan contactor. One wire to your manual exhaust switch would connect to the incoming power and the C terminal, and the other wire would connect to the E terminal, which connects to the exhaust fan contactor.
So, the m/s tripping removes power from the appliance contactor(s) and the light switch, and energizes the exhaust fan contactor if it's not already on. As I said above, you can have one 2p or two 1p appliance contactors, depending on where you choose to break each appliance circuit. So, as I said, one microswitch will do everything.
