Ansul R102,240 v.for control circuit?

[rimo]

Hi there,
I'm electrician here in San Diego.
Recently I took a job at the pizza place - new construction,dining room and kitchen,no FA,no fire protection any kind. In the kitchen two R 102 Ansell system (6 gal.and 4,5 gal.) which was not on my scope of work and now IT IS.I have done Ansul wiring about 10 years ago,but I do understand how it works,- in case of fire make up unit shuts off ,all appliances and light under the hood shuts off as well ,exhaust fan turn on or stay on,main gas valve shuts off. I understand everything go through the contactors and micro switch is the Ansul box,it is two of them there ,but since I don't have fire alarm system all I need just one.Although Ansul contractor provide me with a reset station on the wall. If I remember correctly I have to have one 20 Amp.control circuit and one separate circuit for the hood lights. In my case in main electrical panel,(240/120v 3 phase 4 wire high-leg) I have two 20Amp.2 pole breaker's mark as Ansul#1 and Ansul#2. My question is, where is my control circuit and the circuit for the hood lights? Or it can be done with 240.v 20Amp.pole breaker?
Thank for any help.

 

[hbiss]

Certainly could be MWBCs but I suggest that you start opening things up to see how everything is wired. As far as I know there is nothing that requires the hood lights to be on a dedicated circuit, they just have to be turned off when the Ansul system triggers. Not sure that both systems require separate control circuits either.

-Hal

 

[rimo]

Certainly could be MWBCs but I suggest that you start opening things up to see how everything is wired. As far as I know there is nothing that requires the hood lights to be on a dedicated circuit, they just have to be turned off when the Ansul system triggers. Not sure that both systems require separate control circuits either.

-Hal

It is nothing wired there all I have to microswitches nothing else,

 

[LarryFine]

I have wired quite a few systems. Give us the details of each of these, such as quantity, voltage and current, 1/3 phase, etc.:
Exhaust fan(s)
Intake fan(s)
Electrical appliance(s)
Horn/strobe
Gas valve (if electric) and reset box
Temperature probe(s) and timer
Whether there is/will be a wired control box
Whether one combined system or two sreparate

You made it sound like there are two separate systems, as if there are two separate hoods. Sometimes, they must act as a single system, sometimes they can operate independently, as if in two separate kitchens.

 

[hbiss]

It is nothing wired there all I have to microswitches nothing else,

The micro switch operates a contactor which in turn controls the lights and makeup air fan. It is the contactors that you need to look at to see how they are wired.

Or is it I'm not understanding your question. Are you saying that nothing is wired and you have to wire it?

-Hal

 

[rimo]

my bad,I wasn't clear on info.
So,I have two Independent kitchen hoods,each hood has it's own R 102 Ansul fire suppression system and each one of them has a box with ansul storage tank and releasing mechanism with two micro switches in each box,other words is no any kind or control panels,contactors or any other electrical installation.According to the Ansul mechanical guy tow hoods impended but interlocking because if fire underneath on one of them,other one is not going to discharge and it's only one Fire System Electric Gas Valve Reset for both system and yes one electric mane Gas valve install in the kitchen.Each hood has a MAU feed by 3 pole 20amp circuit, EF 3 pole 20amp circuit.Under the hood I have some cooking equipment,nothing big,gas range,fryers,pasta cooker.
My mane electrical panel 240/120 v 3ph 4 wire has a two 2pole 20 amp breakers mark as Ansul system#1 and Ansul system#2,assuming it's control circuits?
thank you.

 

[hbiss]

Ah, that's better. I can see that the interlocking between the two systems would be that both MUA blowers need to shut down when either system triggers. Maybe one system keeps it's own exhaust going but kills the exhaust of the other? Either system kills the gas valve.

We've talked about this before and someone has a nice schematic that they posted showing the wiring. You would have to modify it to accommodate the two systems but that should be minor with some relay logic.

Forget about what breakers someone else installed and do what you need to do. Generally each blower on it's own dedicated circuit- so that's 4 right there and they could be 120 or 240V motors. Then a 20A 120V control circuit and a circuit for the underhood lights.

-Hal