Caleffi Z-one™ ZSR101 Single Zone Pump Relay, 24 V AC

• Installer friendly - Ample room for terminations, large screw terminals, automatic resettable fuse, snap-in transformers
• Application versatility - 3 selectable 120 VAC auxiliary switches for enabling pumps and boilers, dedicated pump outputs, unlimited zone expansion
• Extremely reliable design - Clutch-protected drive train, durable synchronous motor, millions installed in North America
• Compact design with snap-on actuator with a convenient in-line push button, removable bottom cap allows for easy in-pipe service
• Application versatility - Hot water, chilled water and low-pressure steam
• Compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action
• Heavy duty, sealed, DPDT, fuse protected relay (with spare fuse)
• Two outputs (relay 1 and relay 2) for operating 120 VAC pump with boiler enable, or two devices without boiler enable
• Convenient R, W, C and T, T, COM dual labeling at thermostat terminals
• Rear knock-outs for mounting onto 4 x 4 in junction box