Radiant floor zone - final install questions

MNMAN82

DIY 3rd zone, in-floor heating add to a 2009 triangle tube. Cast iron radiators on zones 1 and 2, with tankless water heater as well.

Thermostat: Uponor A3100101
Zone Valve: Honeywell V8403E
Circulator: Grundfos UPS15-58FC
Switching Relay: Taco 501-4

Looking for a quick sanity check on my wiring, and if anyone has knowledge on adding a resistor (and size)?

MNMAN82

Photo from today

SWEI

Thermostatic mixing valves are not the best match for RFH -- ODR control works far better.

What resistor are you wondering about?

MNMAN82

Looking at this post, I guess I'll add it ...
http://forum.heatinghelp.com/discussion/138025/ideal-thermostat-for-hydronic-radiant-floor

SWEI

If I read that right, you're talking about adding a bleeder resistor to allow a power-stealing 2-wire stat to run a zone control? That's a very clever hack from about 1990, but these days we generally do things a bit differently.