Wireless UFH Multi-Zone Control for Heat Pump Retrofit (Modbus)

SAS936B+SCU217

Wireless UFH Multi-Zone Control System for Heat Pumps

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8-Zone independent temperature management

Compatible with HP cooling and heating

Wire-free installation for easy retrofit

Modbus protocol built into wiring centre

Battery-powered thermostat, flexible setup

Dual compatibility: boiler and heat pump

Home Product Residential Thermostats HP Hydronic Thermostat

Product Feature

The SAS936B+SCU217 Wireless UFH System is the definitive integrated solution for multi-zone hydronic control and retrofit projects. It features battery-powered wireless thermostats and a Modbus wiring centre, making it perfectly compatible with both heat pumps and boilers. Crucially, it specifically addresses the cooling requirements of HP systems. Offering flexible networking for up to 8 zones, the system enables precise room-by-room temperature management without extensive rewiring, positioning it as the ideal choice for residential retrofit and multi-story buildings in Europe seeking high-efficiency zoning.

Key Functions

Multi-Zone Control

Wiring centre connects up to 8 thermostats, managing 8 UFH zones for precise room-by-room control.
Wire-Free Networking

Direct output for Floor Heating Valve and Fan Coil Valve (ON/OFF), accommodating various terminal requirements.
Full HP Compatibility

Fully compatible with heat pump logic, supporting both heating and cooling (floor cooling) modes.

Centralized Modbus

Modbus protocol integrated into the wiring centre for central data transfer to BMS/EMS systems.
Smart Wi-Fi Remote Control

Wi-Fi-enabled remote temperature setting and mode switching via smartphone App for global control.
Smart Voice Control

Works with Amazon Alexa and Google Assistant for hands-free temperature adjustments.

Product Selector

Model No.	Heat/cool	Heat only	Pipe	Speed fan	Programmable	Window card	Room card	External Sensor	Modbus RTU	WIFI	Manual
SAS936BWCHB-7-DFZ(N)+SCU217DE-485(N)	√				√			√	√	√	download

Product Parameters

Wiring centre

Power source:100-240VAC 50/60Hz

max current:10A

Load current output:250VAC 8(5)A

Dimensions:298 x 88 x 64mm

Thermostat

Power supply: 2x1.5V AA alkaline batteries(LR6)

Battery life:1 year

Temperature display: 0~50°C

Temperature setting range: 5~50°C

Temperature display accuracy: 0.1°C

RF wireless transmit range: 100m in open air

Zigbee wireless transmit range: 30m in open air

Dimensions:100*100*19.6mm

Remote control

User can control the thermostat via smart phone all over the world.
Voice remote control

Control the temperature just with your voice. Work with amazon Alexa and Google assistant.
Touch control

LED fashion design, easy touch control.
Heat/cool switch

Quickly switch cooling and heating modes via the app or wiring center.

System Structure and Integration

This wireless UFH system is a multi-zone control solution designed for hydraulic heat pump systems. The core of the system is the Wiring Centre, which controls the pump and provides passive linkage, connecting to either the Boiler or the Heat Pump. The Wiring Centre communicates wirelessly (RF 868MHz or Zigbee) with a maximum of 8 thermostats (1 master + 7 slave) to manage different zones. All devices communicate wirelessly with each other, allowing for App control via a Zigbee gateway. This makes it the best solution for upgrading existing underfloor heating installations, eliminating the need for complex wiring.

Product Application Scenarios

The SAS936B+SCU217 system is primarily applied in European residential market for deep retrofit projects and multi-story buildings. It perfectly solves the complex wiring challenges encountered when upgrading older buildings to heat pump hydronic systems, enabling fast and non-destructive installation. Furthermore, it serves as the core solution for large villas and multi-floor apartments requiring precise room-by-room and floor-by-floor temperature control. The Modbus interface centralizes all zone operational data, meeting the requirements for high efficiency, centralized management, and remote diagnostics by property managers.

Partnership Support

As an established China-based manufacturer and supplier, we offer professional, customized cooperation support services to global HVAC integrators, equipment manufacturers (OEMs), and engineering companies.

Technical Consulting

Expert teams provide App integration guidance (for Tuya or Private Label), detailed wiring tutorials, and 24-hour support for multi-mode heating system troubleshooting (e.g., reversible heat pump issues).
Customization Services

We support full UI interface customization (e.g., brand LOGO, color adjustment), multi-language menu customization, and deep App function integration (e.g., adding project-specific control modules).
Quality Assurance & Global Warranty

Rigorous Quality Control throughout the manufacturing process ensures product reliability and longevity. We maintain a localized quick-response mechanism to support our global partners, ensuring timely resolution of issues and significantly reducing your operational and after-sales burden worldwide.