Description
The Caleffi ZSR103 is a 3-zone pump relay designed for hydronic heating systems, providing reliable, independent control of up to three heating zones from a single, compact panel. Engineered by Caleffi — a trusted name in hydronic system components — this zone pump relay simplifies wiring and commissioning while delivering dependable performance in residential and light commercial applications.
Key Features
- Controls up to 3 independent hydronic heating zones
- Integrated pump relay output for circulator pump activation
- Compact, panel-mount design for easy installation
- Compatible with standard 24V zone thermostats
- Individual zone indicator lights for quick status monitoring
- Built-in priority zone capability for domestic hot water priority
- Suitable for residential and light commercial hydronic systems
Application
The ZSR103 is ideal for zoned hot water heating systems using baseboard radiators, radiant floor heating, fan coils, or other hydronic terminal units. It coordinates thermostat calls from multiple zones and activates the system circulator pump accordingly, ensuring efficient, comfort-driven heat distribution throughout the building.
Why Choose Caleffi
Caleffi is internationally recognized for precision-engineered hydronic system components. The ZSR103 reflects that commitment to quality, offering installers a straightforward, dependable zone control solution that reduces installation time and supports long-term system reliability.
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