NFPA-17A-
4.4.3.5-- Exhaust fans do not need to be shut down on deployment of the wet system.


But in 5.6.2.2- all fuel and heat sources MUST be shut down.
easy to shunt trip the panel.
4.4.3.4- solid fuel- needs no shut down.Fancy Pizza joint--(Joint mmmm)
4.4.3.7- requires all shut down devices need a manual reset.
shunt trip brkr, coverd.