Taco I-series questions

Mosherd1

First question, when using two Taco iseries valves and using two outdoor air sensors, can I run one 18-5  tstat wire and use 2 wires in it for each sensor, or do I have to run two separate cables?

Second question, does the iseries require a 10 temperature differential from the supply temp. vs. the mixed temp like a conventional thermostatic mixing valve or since it’s computer controlled it doesn’t matter?

Dave H_2

Yes, you can use the the multiple wire stat wire and run two sensors. Use one "outdoor sensor box" for one
i-valve because the thermistor is molded into the enclosure and a separate sensor for the other i-valve in the same outdoor box.

You can make the boiler temp match the mix temp, it is a "ball" style valve and will go to wide open if needed.

Dave H.

Mosherd1

@Dave H_2 thank you for the quick and insightful response!

Rich_49

Use the smallest size I Valve where the CV closely matches your flow requirement also . This smaller valve will reach the target temperature faster