Zone valve wiring to split existing zone

[Rick Stanley]

Got a zone with taco 007 pump on supply side. Immediately downstream from pump there is a tee. From the tee it branches and feeds ci rads in 2 areas of the House. Each loop has its own return line.... For comfort reasons I want to add a second thermostat and a zone valve to control the existing pump. How to wire it???? Thanks!!

 

[Bob Rohr]

Got a zone with taco 007 pump on supply side. Immediately downstream from pump there is a tee. From the tee it branches and feeds ci rads in 2 areas of the House. Each loop has its own return line.... For comfort reasons I want to add a second thermostat and a zone valve to control the existing pump. How to wire it???? Thanks!!

The best and cleanest way to to buy zone relay box. Wire the thermostats to then top, zone valves at then bottom and it controls then pump on/off and boiler call if needed. Zone valves on the supply after the pump.

I'm partial to Caleffi brand zone valves and relay box.

Here is some good info, drawings and wiring schematics.

https://www.caleffi.com/sites/default/files/coll_attach_file/idronics_14_0.pdf