SAS931XWHL

Smart 2-Wire 12V Bus Thermostat for Multi-Zone Heat Pump

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12V Non-Polarity Bus Wiring

Modular Quick Replacement

Tri-Mode Heat Pump Control

Rapid 2-Wire UFH Installation

Multi-Zone Centralized Control

Remote APP and Voice Control

12V bus thermostat kit for centralized multi-zone UFH and heat pump control

Right side view of centralized multi-zone controller highlighting port labels and mounting clip

12V carrier communication thermostat with high-resolution display for multi-zone systems

SAS931X Smart 2-Wire Low Voltage Bus Thermostat for Multi-Zone Control

Home Product Residential Thermostats Hydronic Thermostats

Product Feature

The SAS931X Low Voltage Bus Thermostat Kit is the premier solution for modern hydronic UFH and heat pump systems. Its core innovation is the 12V carrier non-polarity bus technology, requiring only 2-wire low-voltage connection to drastically reduce wiring cost and complexity. Featuring a magnetic snap-on panel and modular plug-in design, it ensures fast installation and efficient maintenance. The system supports multi-mode Heat/Cool control and utilizes WIFI for centralized multi-zone control, making it ideal for projects seeking a low wiring cost solution.

Key Functions

2-Wire Non-Polarity Bus

Thermostat communicates and powers via the 12V non-polarity bus, eliminating polarity issues and simplifying wiring.
Modular Quick Maintenance

Features modular plug-in and magnetic panel design for rapid fault diagnosis and replacement, reducing long-term maintenance costs.
Tri-Mode Heat Pump Control

Offers Heat, Cool, and Auto modes, fully compatible with modern Heat Pump systems and radiant control.

Multi-Zone Central Control

One wiring center manages up to 8 thermostats and 12 loops, perfect for large-scale multi-zone control.
Remote APP & Voice Control

Master thermostat enables one-click WIFI networking for remote APP scheduling and mainstream voice control.
12V Low Voltage Safety

Thermostat utilizes 12V Low Voltage power, significantly enhancing electrical safety in residential applications.

Product Selector

Model No.

Heat/cool

Heat only

Pipe

Speed fan

Programmable

Window card

Room card

External Sensor

Modbus RTU

WIFI

Power

Manual

SAS931WHL-XT-WIFI(TY)

√

12-18V(no polarity)

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Product Parameters

Wiring control centre (SCU211CH-BUS)

Power source: 100-240VAC 50 / 60Hz (maximum current 10A)

Storage environment temperature and humidity: -10 ~ 60°C, 0 ~ 90% RH (non-condensing)

Working environment temperature and humidity: 0 ~ 50 °C, 0 ~ 80% RH (non-condensing)

Size: 298 X 88 X 66mm

IP rating: IP40

Thermostat（SAS931X）

Power supply and signal input: DC12 ~ 18V carrier non-polarity input

(power supply wiring control centre, maximum current 100mA)

Storage environment temperature and humidity: -10 ~ 60°C, 0 ~ 90% RH (non-condensing)

Working environment temperature and humidity: 0 ~ 50°C, 0 ~ 80% RH (non-condensing)

Temperature display range: 0 ~ 50°C

Display accuracy: 0.1°C

Size: 86x86x13mm

Protection level: IP21

WIFI antenna emission frequency(master controller): 2.4GMHz

WIFI wireless transmission distance(master controller): 60M in the open area

Easy to install

The thermostat uses a magnetic mounting method, requiring no tools and allowing for quick installation.
Voice remote control

Control your home temperature just with your voice.
Easy commissioning with WIFI

Only master thermostat has WIFI module inside. Once end user commission the master thermostat with WIFI, all slave thermostats can access to WIFI as well.

12V low-voltage bus UFH control

The Wiring Center is powered by Line voltage and the thermostat is powered by 12VAC low-voltage which comes from the wiring center. Only 2 wires are needed to connect the wiring center and the thermostat. The 2 wires are no polarity.

Save time to install

Magnetic panel design, flexible disassembly. Only 12 wires are need to complete the intallation.

Save after sale cost

Modular plug-in design,find fault in 3 minutes,replace in 1 second

Functional Wiring Diagram

Cover heating control requirements of the water-floor heating system and boiler system.

Contrlo more with wiring center

One wiring center can wiring Maximum 8 thermostats. Each of the first 4 thermostat can control 2 Actuators, 8 thermostat can control maximum 12 Loops.

Product Application Scenarios

The SAS931X Low Voltage Bus Control Kit is ideal for high-demand multi-zone control scenarios, including large villas, luxury apartments, and high-standard residential projects. It is the perfect low wiring cost solution for commercial buildings requiring efficient installation and reliable modular maintenance, especially for integrated hydronic UFH and heat pump systems.

luxury apartments

apartments

Residential

Partnership & OEM/ODM Support

Partner with us for a competitive edge in the smart HVAC market. We offer unparalleled flexibility and reliability to secure your success.

Rapid Customization & OEM

Leverage our robust platforms for fast product customization and OEM/ODM services, ensuring your product perfectly meets market demands.
Global Technical Support

We provide expert on-site technical guidance, system integration support, and remote troubleshooting to ensure smooth project execution worldwide.
Long-Term Quality & Aftermarket

We offer comprehensive quality assurance and an efficient after-sales service system, utilizing the modular design to minimize your maintenance and operating risks.