Conical Chiller(s)...Wiring Help

[fpweeks]

Im in the planning stages of a controller to maintain ferm temps in two conicals. It will have two temp controllers, one for each conical, which will control a single pump to move glycol to one or both fermentors, through the use of two solenoid valves.

Im thinking i can use two of the Auber SYL-2362, im just a little confused as to how to have both controller outputs turn on the pump while individually operating the solenoid valves. Can i do it with a single contactor switched from both controllers?

IF someone had a rough wiring diagram for this it would be great!!

 

[Gonefishin]

If I follow your question, use DC voltage for your control circuit, you can use diodes to enable the activation of the pump from either temp sensor, but only the solenoid you are trying to control.

 

[fpweeks]

I'm thinking that there should be a way for two independent controls to be connected to the same contactor, which would then energize the pump. I'm just not that sure if its that simple and if it is...what's that contactor called?

 

[Junkster]

Have each PID control a double pole contactor and connect one pole to its respective solenoid valve and one pole to the pump. The pole from each contactor (for each conical) which goes to the pump would be paralleled with the other conical(s) contactors so that when ANY controller activates its solenoid, the pump would run also.

 

[fpweeks]

Yeah I think I decided that I just need two relays/contractors one for each controller....thanks for the reassurance.