Adding outdoor reset

Halbert

I have hot water baseboards, with a Trane boiler, 3 taco zone valves and taco valve controller, and honeywell I 7724 aquastat. I'm thinking about adding a Honeywell 8735Y1000 outdoor reset with the wireless temperature unit.

What are the pitfalls of adding outdoor reset to a system with zone valves? It appears obvious that a system which would run the circulator all the time would need the recirculation valve opened a little to keep the pump from dead heading when all the valves are closed--or is it better to program it so that the pump runs only when one of the valves is open?

I live in suburban Philadelphia, so it rarely goes below 10F outdoors. I run with a 5 F turndown at night, and during the day when no one is home. I have found that if the outdoor temperature falls below 15F, I need to have the aquastat set to 190 or 200 to get decent recovery time.

I'm open to suggestions.

STEVEusaPA

If it’s oil, don't bother unless you’re putting in a buffer tank.

Zman

What model boiler?
Is it condensing?

Halbert

zman: I erred: It is a Lennox COWB3-3-1.00