Fire Protection System

[aftershock]

I have to use an existing fire protection system to shut down a 30 amp 220 volt fryer. I have done one of these before, but that was 3 yrs ago.
This system is existing and has never had the micro switch used to shut anything on or off. So what we have is the current system with 6 wires hanging out the back of it.(Black, Red, Blue, White/Black, White/Red, White/Blue)

I am looking at the back of the cover plate at the wiring diagram:

Outer Switch Diagram #1
White/Black (Hot) = Common
White/Blue = Normal Open
White/Red = Normal Close

Inner Switch Diagram #2
Black (Hot) = Common
Blue = Normal Open
Red = Normal Close

I know I am going to have a contactor (with a 110/v coil) in place for the 220/v fryer circuit to pass through.
Question #1 Does the contactor I purchase need to be a NO, or NC? Or does it matter.

I am kinda figuring I will use diagram #2 and supply a 110/v hot to the black wire.
Question #2 Out of the blue and red wire, which one will come back to energize the contactor when the system is engaged?

I have to get this job finished tomorrow. I just started it this afternoon. :/

 

[benaround]

Aftershock,

Q.1--n.o., it will close when power is applied

Q.2--red,n.c., coil will be energized all the time. When system is activated

the switch will change state (open} and the fryer will lose power.

This is a fail safe operation,if control power is shut off for any reason the

fryer will not work, this will insure the power is on when needed.

 

[aftershock]

Ok,, I got it figured out and working. Seems the blue wire is the one to connect to the coil to keep it energized for normal operation of the fryer. And next time I will know that all I need to do is a continuity test to find the correct wire to use.

Thanx for the response.