Caleffi Hydronic Circulator Pump Relays
Caleffi Single and Multi-zone pump and boiler operating control for multiple zone hydronic heating systems. Interfaces with low voltage thermostats or any other low voltage controllers having a switching action.
Controls 1 or from 3 to 6 heating circulator pumps (model dependent). Primary pump with LED indicators to provide functional status and easy system troubleshooting.
Primary pump system circulator is switched on whenever any zone calls for heat.