Caleffi ZSR104 4 Zone Expandable Switching Relay with Priority Hassle-Free Returns

The Caleffi ZSR104 is an expandable switching relay designed to control up to four hydronic heating zones with additional priority zoning capabilities. This module is ideal for simplified zoning applications where multiple zones require individual control.

• Integrates with low voltage thermostats or controllers.
• Features high capacity transformer options and multiple zone control.
• Fully equipped with LED indicators for system diagnostics and status reports.

Product Highlights

This Caleffi ZSR104 model ensures a robust operation with a 120V AC power input and a built-in 24V circuit featuring an automatic resettable fuse. The unit allows for easy installation and maintenance, providing a reliable and efficient heating management system.

Product Information

Standard Information

• Brand: Caleffi
• MPN: ZSR104
• Power Input: 120 VAC
• Status Indicators: LED

Technical Specifications

• Zones: 4
• Voltage: 24 VAC
• Frequency: 50/60 Hz
• Width: 11 inches
• Height: 9.25 inches
• Depth: 3 inches
• Weight: 2.0 lbs
• Amperage: 20 A