Caleffi ZSR103 Zone Valve Relay 3-Zone 120 VAC Best Choice

Improve the efficiency of your hydronic heating system with the Caleffi ZSR103, a three-zone valve relay. Designed to control both boiler operations and zonal pumps, this device is a must for any residential or commercial space using low voltage thermostats or similar controllers.

• Controls up to three zones independently.
• Features LED indicators for easy monitoring and troubleshooting.
• Compatible with various power inputs: 24VAC/VDC and 120-240VAC.

Product Highlights

The Caleffi ZSR103 offers simple yet robust zone control with its expandable design, ensuring efficient and reliable operation. It can manage multiple pumps and comes with built-in dry contact options for enhanced versatility in system configurations.

Product Information

Standard Information

• Brand: Caleffi
• MPN: ZSR103

Technical Specifications

• Number of Zones: 3
• Power Supply: 24VAC/VDC, 120-240VAC
• Amperage: 20 amps
• Dimensions: 9.25 inches height x 4.5 inches length x 3.5 inches width
• Control Type: LED, Dry Contacts