Taco SR506-EXP 6-Zone Expandable Switching Relay with Priority
Taco SR506-EXP 6-Zone Expandable Switching Relay with Priority
National Boiler Supply is a premier, authorized procurement distributor for high-efficiency commercial equipment. Every order ships factory-direct, completely insured, and backed by full manufacturer engineering warranties and technical field support.
| Specification Parameter | Official Factory Value |
|---|---|
| Controlled Heating Zones | 6 Individual Loops (Expandable up to 20 Zones) |
| Input Voltage Profile | 120 VAC, 60 Hz Input Supply |
| Thermostat Output Power | 24 VAC Standard Supply Circuit / 40 VA Rating |
| Maximum Combined Amperage | 20 Amp Full Load Capacity |
| Interfacing End Switch | Isolated Burner End Switches (Main and Priority Loops) |
| Enclosure Architecture | Heavy Steel Cabinet with Hinged Front Cover Access |
| Thermostat Compatibility | Universal Fitment (Conventional, Smart, & Programmable) |
| Safety Certifications | UL Listed and CSA Approved Standards |
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The Taco SR506-EXP 6-Zone Expandable Switching Relay is a premium commercial-grade multi-zone hydronic control panel designed to streamline the wiring and operational logic of complex multi-zone radiant or baseboard heating networks. Encased in a heavy-duty steel cabinet, this central node cleanly consolidates up to 6 independent thermostat inputs and manages up to 6 dedicated zone circulator pumps simultaneously.
Advanced Expandability & Customization
Equipped with Taco’s signature "EXP" architecture, this module allows system designers to seamlessly link multiple control panels together, expanding a hydronic network up to 20 total zones. Integrated PowerPort slots allow maintenance engineers to plug in advanced add-on control cards—such as outdoor reset parameters or post-purge timers—enabling total customization of multi-stage boiler operations without changing the underlying wiring framework.
Intelligent Network Integration & Safeguards
- Switchable Zone 1 Priority: Features a dedicated priority toggle switch, allowing Zone 1 to temporarily deactivate zones 2 through 6—ideal for delivering instantaneous thermal output to indirect domestic hot water heaters.
- External Diagnostic LED Array: Bright external indicator lights provide real-time visual diagnostics, allowing technicians to verify power status, thermostat calls, and individual pump activation instantly.
- Replaceable "Ice Cube" Relay Relays: Built with standard field-replaceable fully enclosed snap-out relays and robust fuse protection to insulate the core computer board from external electrical surges.
Looking for complex multi-panel wiring schematics or terminal block configurations? Click here to request the official factory submittal manuals from our engineering desk.
