
| Specification | Wired Connection | Wireless Connection |
| Zones | 5-zone / 8-zone | 5-zone / 8-zone / Expandable to 64 zones |
| Heating/Cooling | Heating only / Heating+Cooling | Heating only / Heating+Cooling |
| Heat/Cold Source Compatibility | Gas boiler / Heat pump+Chiller | Gas boiler / Heat pump+Chiller |
| Control Voltage | 230V / 12V SELV | 230V |
| Ideal For | New builds with pre-routed cables, standard homes, radiant heating+cooling | Retrofits with no wall-chasing, standard home upgrades, multi-story villa cross-floor expansion |
Quick Selection Guide
Wired & Wireless Flexibility
SCU Series offers hardwired, RF wireless, and LoRa wireless cascading (SCU217). Choose wired for new builds with pre-routed cables, RF wireless for retrofits without wall-chasing, or LoRa wireless for cross-floor projects. wireless retrofit wiring center.
Universal Component Compatibility
Terminal blocks support circulating pumps, zone valves, thermal actuators, thermostats, hot water timers, and volt-free interlocks. Compatible with various system configurations and boiler/heat pump switching voltages.
Boiler & Pump Protection Interlock
Dry-contact outputs activate primary equipment only when a zone valve is fully open, preventing dry running and short-cycling. Learn more about boiler pump interlock protection.
Contact our friendly customer service team for any questions, concerns, or suggestions. We'd love to hear from you.
Headquarters Hotline: +86 755 61218391 Headquarters Hotline +86 755 61218391
Headquarters Email: info@saswell.com
Tech Support Email: support@saswell.com
