Electric Supply120 V (AC)
Warranty3-Year Limited
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 transcribed from Caleffi North America published technical literature. Last verified August 2026.
Warranty
Caleffi 3-Year Limited Warranty. Caleffi North America warrants this product free from defects in material and workmanship for three years from the date of transfer of ownership - the point Caleffi hands the goods to the first carrier - subject to correct installation and use. Caleffi also runs a five-year warranty program: a Z-one zone valve purchased and installed together with a ZVR Z-one relay qualifies both products for five-year coverage. Coverage runs to the purchaser identified as "Ship To" on Caleffi's order confirmation and is subject to the eligibility conditions, exclusions and remedies set out in Caleffi North America's published Limited Warranty and Terms and Conditions of Sale. This summary is provided for convenience and does not replace those documents.
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).
Caleffi 3-Year Limited Warranty. Caleffi North America warrants this product to be free from defects in material and workmanship for three years from the date of transfer of ownership (when the goods are handed to the first carrier), when installed and operated in accordance with published instructions. Caleffi also runs a five-year warranty program: a Z-one zone valve purchased and installed together with a ZVR Z-one relay qualifies both products for five-year coverage. Coverage runs to the purchaser identified as "Ship To" on Caleffi's order confirmation and is subject to the eligibility conditions, exclusions and remedies set out in Caleffi North America's published Limited Warranty and Terms and Conditions of Sale. This summary is provided for convenience and does not replace those documents. ZOT Supply is an authorized Caleffi distributor.
