The Caleffi ZVR104 is a Z-one 4-zone valve control relay.
Best for coordinating multiple zones, circulators and the heat source from one enclosure.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Zone Valve Switching
Powers and sequences 4 zone valve actuators from thermostat calls, with the transformer sized for the valve load.
Valve End-Switch Interlock
Uses the zone valve end switches to start the circulator and heat source only once a valve has actually opened.
Technical Specifications
| Product Type | Zone Control Relay |
| Electric supply | 120 V (AC) |
| Series | Z-one Valve Control |
Documentation
Related Products
Frequently Asked Questions
What does Caleffi ZVR104 control?
It is a zone valve control relay. It powers and sequences 4 zone valve actuator(s) from thermostat calls and uses the valve end switches to start the circulator and heat source.
Can Caleffi ZVR104 switch circulators instead?
No. This board drives zone valve actuators. Caleffi's ZSR series is the equivalent board for switching zone circulators.
What supply voltage does Caleffi ZVR104 require?
Electric supply is 120 V (AC).
What is the warranty on Caleffi ZVR104?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.
- Product Type:
- Zone Control Relay
- Product Family:
- Z-one Zone Controls
- Series:
- Z-one Valve Control
- Zones:
- 4
- Electric Supply:
- 120 V (AC)