primary/secondary

Paul S_3

When using a regular atmospheric hot water boiler with primary/secondary piping....how do I control the primary pump? System is going to have four high temp baseboard zones.....and three radiant zones with 3 way mixing valves.....should that I use a relay to turn primary pump on whenever any zone call for heat or outdoor reset Paul s

Alan (California Radiant) Forbes

The easiest way

is to wire it off the boiler if it has a pump relay.



If not, create you're own pump relay off the end switches as you say.

Paul S_3

primary/secondary

Do you recommend one pipe primary secondary or two pipe on a residential home? Heat loss of home about 160000btuh's...thanks Paul s