Versatile Zone Controllers

Combine the popular Z-one™ zone valves with our flexible relay controls for smart hydronic heating applications.  

The ZSR and ZVR Series zone controls, compact and sleakly designed, are compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action and are compatible with power steeling t-stats.   The controls have convenient R,W,C and T,T,COM dual labeling at thermostat terminals.  A new AUX dry contact output closes when any zone calls.  An easy to read PC board layout features additional configuration jumpers for added pump control flexibility.  A "Remote Enable" function simplifies off-season disable.  Now available with additional, large ground screw terminals for ease of wiring and on-board ground terminal.   The front panel LED indicator lights for functional status.

Install a Z-one™ zone valve together with a ZVR Z-one™ relay and both qualify for our industry exclusive 5-year warranty.  

CALEFFI – Creating innovative, superior performance products that help customers live comfortably and economically, while softening their impact on the environment.