I have two Nest thermostats that depand on a single boiler. Only Nest A can actually turn the boiler on (steam heat). Nest B is hooked up to a water circulating pump. (It cycles the water used to generate steam.)
What I’d like to do is circulate the initial heat then then the residual heat after the boiler turns on/off.
After Nest A turns on, wait 10 min then turn on Nest 2 for 15 min.
When Nest A turns off turn on Nest 2 for 15 min.