4-Inch AC FCU Thermostat (10A) | Modbus/WIFI & System Upgrade OEM

SAS965FCT

4-Inch Color Screen AC FCU Thermostat

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Reliable Relay Control for Traditional 3-Speed AC FCU

Max 10A Load Capacity for High-Power FCU Systems

Dual Valve Control: PI Proportional / On/Off

WIFI/Modbus for Seamless FCU Remote Management

7-Day Quick UI Customization & Brand VI Integration

60-Day ECR Response for Project Deployment

Home Product Commercial Thermostats Fan Coil Thermostats

Product Feature

High-load 4-inch AC FCU Thermostat (10A) with Modbus/WIFI for 3-speed fan retrofit projects and dual valve control.

Key Functions

Remote Smart Control

Achieves FCU remote start/stop, mode switching, and temperature setting via WIFI App or Modbus 485, compatible with smart building management without on-site operation.
Fan Speed Modes

Supports High/Mid/Low manual speed switching and smart automatic fan speed mode, precisely matching the needs of 3-speed AC FCU operation.
Programming Mode

Allows for scheduled (timed/weekly programming, e.g., weekday/weekend differential temperature) operation to achieve fine-grained energy management for the FCU system.

System Compatibility

Adapts to 2-pipe and 4-pipe FCU systems, enabling FCU system upgrades to reuse existing wiring without additional installation.
Safety Protection

Features coil anti-freeze protection (automatic activation at low temperature) and keypad lock (child lock) functions to ensure the safe and reliable operation of the fan coil unit thermostat.

Product Selector

Model No.	Fan Control Type	Water Valve Control Type	Max Load Current	Recommended Application	Manual
SAS965PIT	3-Speed Fan (220VAC)	PI Proportional Valve (0-10V)	6A	Traditional Precise Scenarios: Projects requiring fine-tuned water temperature control (such as hospital outpatient departments or school classrooms) with traditional three-speed fan coil unit (FCU) systems, adapted for a Variable Water Flow (VWF) system (or Variable Primary Flow (VPF) system).	download
SAS965FCT	3-Speed Fan (220VAC)	On/Off Valve (220VAC)	10A	Traditional High-Load Applications: Standard FCU projects necessitating high-load operation (e.g., powerful water valves) in settings like older office building retrofits or budget hotels, offering exceptional cost performance/value.	download

Product Parameters

* Power supply: 100~240VAC 50/60Hz
* Standby Power Consumption: ≤2W
* Display accuracy: 0.1°C
* Temperature setting step: 0.5℃
* Communication: Modbus 485/ 2.4G WIFI
* Displayed temperature range: 0~70°C
* Operating temperature range: 0~50°C
*Temperature setting range: 5~35°C

*Dimensions 86x86x12mm

Rapid programming

Supports programming via the device or APP settings.
Adjustable fan speeds for personalized comfort

Easily switch between Auto, Low, Medium, and High speed to match your cooling/heating/ventilation needs
Child lock function for safe control

Prevent unintended changes with a simple lock
—Peace of mind for families and public spaces
Voice remote control

Compatible with amazon Alexa and Google assistant.

Customizable screen brightness

Three-Level screen brightness adjustment

Adaptive sleep mode for perfect nighttime comfort

Temperature shifts intelligently over 8 hours to enhance rest and reduce power consumption.

Product Dimensions

Embedded installation, compatible with standard 86-type junction boxes, no additional drilling or wall modifications required.

Product Installation

Product Application Scenarios

Designed for conventional 3-speed AC FCU systems, this thermostat offers high-reliability relay control and strong system compatibility. Featuring a high-load 10A model, dual valve (On/Off & PI) support, and built-in WIFI/Modbus,it's the ideal choice for modernizing traditional AC FCU infrastructure.

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. Our services include:

Technical Consulting

Professional engineer teams provide selection guidance, parameter configuration advice, and project technical support for fan coil unit thermostats.
Customization Services

7-day UI customization and 60-day function customization based on the product platform. We offer deep customization of functional modules (e.g., adding sensor interfaces) and communication protocols (e.g., designing exclusive protocols) based on specific building energy saving needs and system compatibility requirements.
After-Sales Guarantee

We provide an 18-month product quality warranty and establish a localized rapid response mechanism to ensure timely resolution of issues, minimizing client operational risk.