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- The ZSR series is a zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low voltage thermostats, or any other low voltage controllers having a switching action. The ZSR series controls up to 6 zone pumps (depending on model selected) and a primary pump. It has LED indicators to provide functional status and easy system troubleshooting.
Caleffi Z-one™ Zone Pump Relay, 4 Zone, Series: ZSR, 24 VAC, 120 VAC, 50/60 Hz, LED, 11 in L x 3 in W x 9-1/4 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 relays
- 1 primary pump output and 3 to 6 (model dependent) zone pump outputs (120 VAC/5 A each)
- Zone priority selectable with 1 hr time-out feature
- Convenient R, W, C and T, T, COM dual labeling at thermostat terminals
- System pump status (on/off) during priority selectable
- Dry contacts (XX,AUX, ZONE 1 E/S) capable of switching line voltage
- High capacity 12 VA or 20 VA transformer (model dependent)
- Automatic resettable fuse on 24 V circuit
- Selectable post purge
- Selectable pump exercising
- 3 pump ground terminals for simplified wiring
- Expandable to unlimited number of zones using simple 3-wire connection between controls
- Large screw terminals for ease of wiring
- Front panel LED indicator light for functional status
- Voltage Rating24 VACDimensions11 in L x 3 in W x 9-1/4 in HDisplay TypeLEDFrequency Rating50/60ManufacturerCaleffiManufacturer #ZSR104Power Rating120, 120 VACSeriesZSRType4 Zone