ZSR/ZVR 3-6 Relay

Caleffi ZSR & ZVR Zone Relays – Multi-Zone Hydronic Control (3, 4, or 6 Zones)

The Caleffi ZSR and ZVR Zone Relays are dependable multi-zone operating controls designed for hydronic heating and cooling systems. Available in 3-zone, 4-zone, and 6-zone models, these relays simplify wiring, provide clear LED system status, and ensure reliable operation for pumps or valves.

⚡ Available Models

• ZSR 3 Relay – 3 Zone Pump Relay

• ZSR 4 Relay – 4 Zone Pump Relay

• ZSR 6 Relay – 6 Zone Pump Relay

• ZVR 3 Relay – 3 Zone Valve Relay

• ZVR 4 Relay – 4 Zone Valve Relay

• ZVR 6 Relay – 6 Zone Valve Relay

🔑 Key Features (ZSR & ZVR Relays)

• Compatible with low-voltage thermostats (2, 3, or 4 wire)

• Z-oneLink™ unlimited zone expansion

• LED indicators for quick system status and troubleshooting

• Selectable Priority with 1-hour time-out (ideal for DHW)

• Selectable Post Purge & Exercise functions

• Simplified wiring with large terminals and extra ground connections

• Heavy-duty sealed relays and fuse-protected outputs (spare fuse included)

• Remote enable input (24–120 VAC)

• ETL approved, factory tested

🔧 Specifications (General)

• Power Supply: 120 VAC, 50/60 Hz

• Transformer Voltage: 24 VAC

• Temperature Range: 32°F (0°C) – 115°F (45°C)

• Humidity: Max 90% non-condensing

• Fuse Protection: Type 2AG, 5A slow blow

• Approvals: UL873, CSA C22 No. 24, ETL Listed

• Warranty: 3 years

🛡️ Warranty

• Backed by a 3-year manufacturer’s warranty

📦 Return Policy

We want you to be 100% satisfied with your purchase. If not, return the product within 30 days in original packaging and condition. Refunds are subject to a 10% restocking fee, provided the item is received in good condition.