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- The ZSR101 single zone switching relay is operated by low voltage thermostats. The ZSR101 single zone switching relay incorporates Power In, Relay 1 and Relay 2 connection terminals to provide a convenient and cost effective way to control a circulator and a boiler operating control in a single zone hydronic heating system. The ZSR101 single zone switching relay saves hours in installation time and provides a clean and professional installation.
Caleffi Z-one™ Zone Pump Relay, Single Zone, Series: ZSR, 120 V, 50/60 Hz, 4-5/8 in L x 2-5/8 in W x 5-3/8 in H
- 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
- High capacity 6 VA transformer
- Automatic resettable fuse on 24 V circuit
- Simplified wiring with pre-installed jumper
- Large screw terminals, on-board ground terminals
- Front panel LED indicator light for functional status
- Voltage Rating120 VDimensions4-5/8 in L x 2-5/8 in W x 5-3/8 in HFrequency Rating50/60ManufacturerCaleffiManufacturer #ZSR101Power Rating120 VACSeriesZ-OneTypeSingle Zone