PLC & RF Hybrid Underfloor Heating Controller: No-Wire Retrofit for Heat Pumps
● Zero-Scars Retrofit via PLC Tech (Existing Wiring)
● Matter-Ready Ecosystem Integration (Future-Proof)
● 8-Zone Precise Hydronic Management (High Capacity)

Smart heat pump controls (Heating & Cooling, Wired/Wireless)

Engineered for the European energy transition, this hydronic solution is the ultimate bridge for upgrading historic stone houses from gas boilers to modern Heat Pumps. By combining PLC (Powerline Communication) and 868MHz RF, it ensures 100% connectivity where wireless fails, eliminating costly rewiring. This "Matter-Ready" execution layer manages complex 8-zone radiant heating and cooling via algorithm-based dew point protection, providing a high-margin, professional platform for OEM brand owners.

Solution Diagram

This centralized 8-zone master hub serves as the high-reliability execution layer for modern HVAC systems, delivering intelligent heating/cooling switchover logic with built-in pump linkage to maximize Seasonal COP (SCOP). It features a sophisticated hybrid connectivity architecture: the PLC (Powerline Communication) module utilizes existing 230V power lines for industrial-grade data transmission through thick structural barriers, while the 868MHz RF frequency provides flexible placement for thermostats in wireless-restricted areas. To ensure system safety during summer cooling, the firmware executes an algorithm-based dew point protection logic that synchronizes the heat pump and terminal units without requiring additional humidity sensors. This integrated approach—compliant with EU ErP directives—automates the synergy between circulation pumps and heat sources, significantly reducing total cost of ownership (TCO) while extending equipment lifespan.
Advantages

Application Scenarios

Large Flat / Spacious Apartment

Villa

Related Products

Wireless Heat Pump Control

SAS936BWCHB
SAS936BWCHB-7-DFZ(N)
● Power Supply: 2 x 1.5V AA Alkaline Batteries (LR6 Model)
● Battery Life: 1 year
● Temperature Display Range: 0~50°C
● Temperature Set Range: 5~50°C
● Temperature Display Accuracy: 0.1°C
● RF Wireless Transmission Distance: 100 meters (in open space)
● Zigbee Wireless Transmission Distance: 30 meters (in open space)
● Dimensions: 100 x 100 x 19.6 mm
● Storage Temperature and Humidity: -10~60°C, 25~90% Relative Humidity (non-condensing)
● Operating Temperature and Humidity: 0~50°C, 25~90% Relative Humidity (non-condensing)
SCU217DE-485(N)
● Power Supply: 100-240VAC 50/60Hz
● Maximum Current: 10A
● Load Current Output: 250VAC 8(5)A
● Operating Temperature: 0°C~50°C, 0-80% RH
● Storage Temperature: -10°C~60°C, 0-90% RH
● Dimensions: 298 x 88 x 64 mm

Wired Heat Pump Control

SAS931XWCH-XT-WIFI(TY)
Master [SAS931XWCH-0-BUS-WIFI(TY)] / Slave [SAS931XWCH-0-BUS-S]
● Power and Signal Input: DC12~18V, non-polar carrier input(Power to control center, max 100mA)
● Storage Environment Temperature and Humidity: -10~60°C, 0~90% RH (non-condensing)
● Operating Environment Temperature and Humidity: 0~50°C, 0~80% RH (non-condensing)
● Wi-Fi Antenna Transmission Frequency (Main Controller): 2.4GHz
● Wi-Fi Wireless Transmission Distance (Main Controller): 60m in open space
● Temperature Display Range: 0~50°C
● Display Accuracy: 0.1°C
● Color: White
● Dimensions: 86 x 86 x 13 mm
● Protection Rating: IP21
SCU211CH-BUS
● Power Supply: 100-240VAC 50/60Hz (Maximum Current 10A)
● Storage Environment Temperature and Humidity: -10~60°C, 0~90% RH (non-condensing)
● Operating Environment Temperature and Humidity: 0~50°C, 0~80% RH (non-condensing)
● Color: White
● Dimensions: 298 x 88 x 66 mm
● Protection Rating: IP40
FAQ

Why is PLC (Powerline Communication) superior to Wi-Fi or Zigbee in European retrofit projects?

In historic European buildings, thick stone or reinforced concrete walls act as Faraday cages, severely degrading RF signals. PLC technology bypasses these physical barriers by using existing 230V electrical wiring as a high-speed data bus. This ensures 100% connectivity and industrial-grade stability without the need for destructive rewiring or expensive signal repeaters.

How does the system manage 8-zone radiant cooling without individual humidity sensors?


The system ensures floor safety through a software-defined temperature floor. By maintaining a constant, safe supply water temperature (typically set at 18°C or above), the controller effectively keeps the radiant surfaces above the dew point in typical residential environments. This fixed-temperature strategy provides a robust and cost-effective cooling management solution, eliminating the need for complex and expensive per-room humidity sensors while preventing condensation.


How does the PLC communication function, and is it resistant to electrical interference?

The PLC (Powerline Communication) specifically handles data transmission between the thermostats and the master wiring centre, utilizing the existing 230V power lines. Our PLC module operates on a filtered carrier frequency designed to resist noise from modern inverters, LED drivers, and heavy appliances. This ensures that control signals remain stable and uncorrupted within the local electrical network, even in complex environments with high electromagnetic interference.

Does the system support "Boiler-to-Heat Pump" (B2HP) logic for energy transitions?

Absolutely. The master controller is specifically designed for the EU energy transition market. It includes dedicated logic for air-to-water heat pump integration, featuring dry-contact linkage for heat source demand and intelligent Summer/Winter mode switching. This makes it the ideal "execution layer" for contractors upgrading traditional gas boiler systems to modern hydronic heat pumps.

Can the local control logic function if the Cloud or Wi-Fi gateway goes offline?

Yes. Reliability is our priority. While the App provides remote management, the core pump and valve linkage logic is processed locally at the hardware level. Even in the event of a total internet outage, the thermostats and wiring centre will continue to execute safety protocols and temperature schedules to protect the HVAC infrastructure.

Is this solution Matter-ready for integration into multi-admin ecosystems?

Yes. We provide a Matter-compatible bridge that allows our PLC/RF hybrid system to be recognized as native clusters within Apple Home, Google Home, and Amazon Alexa. This enables OEM brand owners to offer a future-proof product that fits seamlessly into the expanding Matter smart home ecosystem.

Get In Touch

Contact our friendly Customer Service team for any Question,Concern, or Suggestion. We'd love to hear from you!


Headquater hotline: +86 755 61218391

Headquater email: info@saswell.com

MENA tech support hotline: +97155 6743682

MENA tech support email: support@saswell.com

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