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- The ZVR series is a zone valve and boiler operating control for multiple zone hydronic heating systems. The ZVR series interfaces with low voltage thermostats, or any other low voltage controllers having a switching action. The ZVR series controls up to 6 zone valves, depending on model selected. In addition, a system pump and secondary pump is turned on whenever any zone calls for heat. A DHW primary pump can also be operated. LED indicators provide functional status and easy system troubleshooting.
Caleffi Expansion Transformer, Multi-Zone, 120 VAC Primary, 24 VAC Secondary, 40 VA
- Anti-scale materials prevent scaling on internal sliding parts, that reduces jamming caused by lime deposits, assuring reliable, constant temperature setpoint and long, trouble-free operating life
- Optional outlet temperature gauge speeds up the temperature setting process and provides dedicated proof-of-temperature verification to aid in the commissioning process (521, 5231)
- Compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action
- Heavy duty, sealed relays
- 3 pump outputs (120 VAC/5 A) and 3 to 6 (model dependent) zone valve outputs (24 V)
- Zone priority selectable with 1 hr time-out feature
- Convenient R, W, C and T, T, COM dual labeling at thermostat terminals
- System pump status (on/off) during priority selectable
- Dry contacts (XX,AUX, ZONE 1 E/S) capable of switching line voltage
- Replaceable, snap-fit 40 VA transformer on 3 and 4 zone models, expandable to 80 VA with 2nd transformer
- Two replaceable, snap-fit 40 VA transformers (80 VA) on 6 zone models
- Automatic resettable fuse on 24 V circuit
- Expandable to unlimited number of zones using simple 3-wire connection between controls
- On-board ground terminals
- Front panel LED indicator light for functional status
- High capacity 40 VA transformer standard for 3 and 4 zone models
- Power Rating40 VAPrimary Voltage120 VACSecondary Voltage24 VACManufacturerCaleffiManufacturer #NA10343