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Paul SPaul S Member Posts: 1,229
When using a regular atmospheric hot water boiler with primary/secondary 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
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
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