wiring circulator pump relay

johnnyd

I'm putting together a relativly simple system with 6 zones operated by zone valves (four wire with end switch) ,a single circulator pump, and water heater. I've looked at the controllers offered by Taco and Honeywell, but they offer I think way more features than I need, and would like to DIY it.

Simple question is how does the pump relay handle multiple signals from the zone valves when more than one valve is calling for circulation, assuming that I can directly wire ALL of the end switch wires to close the relay?

Probably will go with a Taco 007 or 009. What would a be a good source for a relay?

Alan(CaliforniaRadiant)Forbes

Taco

I'd use a Taco ZVC-406 zone valve controller. It makes troubleshooting and wiring much easier. Considering the benefits, they are not that expensive.

http://www.taco-hvac.com/current_category.61/prod_detail.html?Product_Group_ID=ZVC406

As fas as multiple signals from the zone valves, all the relay responds to is a closed end switch; whether it's one or all 6 doesn't matter.


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hydronicsmike

What about using...

...the 007Z Priority Zone Circulator with built in Relay?

If you wire each zone valve off it's own thermostat, then you could wire all zone valve motor end switches to the T-T terminals on the priority zone circ. Then when ever any one of the end switches closes, the connection on the T-T on the Circ is made and it will operate.

It may be a little bit cheaper, but the Relay Boxes are simpler and easier to wire and you wont need a seperate transformer. Joe?

Hope this helps.

Mike

Jamie_4

I agree with Alan. Use a ZVC406 but forget the relay. Not needed since you can wire 110V through the set of dry contacts (as per Taco tech support) to power your pump (Run 110V to N/O & C).

Alan(CaliforniaRadiant)Forbes

I meant

the relay in the ZVC.

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johnnyd

Thanks...

After taking anotherr look at the

http://www.taco-hvac.com/current_category.61/prod_detail.html?Product_Group_ID=ZVC406

and assessing my skills and available time, this looks better and better.