SAS965FCH 4-inch Color Screen Anti-Condensation Radiant Thermostat

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Key Functions

Reduced Callback Risks – Precision Dew-Point Logic

Slashed Sourcing Costs – Universal Terminal Compatibility

Zero Field Programming – 6 Pre-Set Hydraulic Modes

Premium User Experience – 4-inch Color Touchscreen

Seamless BMS Integration – Standard RS485 Modbus RTU with Optional Wi-Fi

Faster Product Launch – 7-Day UI Customization

Home Color Screen Thermostats SAS965FCH 4-inch Color Screen Anti-Condensation Radiant Thermostat

Product Overview

SAS965FCH 4-inch color screen anti-condensation radiant thermostat provides multi-terminal coordination and dew-point protection for hydronic heat pump systems. It is part of the WCH series radiant thermostats, engineered to control hybrid profiles including fan coil units (FCU), underfloor cooling, and capillary mats. Six pre-set hydraulic modes offer complete flexibility for any terminal combination, integrated with real-time dew-point calculation to prevent condensation。

Product Features

Precision Dew-Point Logic

Monitors indoor temperature and humidity; closes chilled water valve near dew point to prevent condensation damage. Optional external humidity sensor.
Universal Terminal Compatibility

Compatible with fan coil units (2/4-pipe), underfloor heating, capillary mats, and radiant panels. Output: 0-10V, On/Off, or 3-point floating.
6 Pre-Set Hydraulic Modes

Built-in modes: single FCU cooling, FCU+radiant cooling, single radiant cooling, single FCU heating, FCU+radiant heating, single UFH heating. Supports combined ceiling and floor radiant systems.

4-Inch Color Touchscreen

Capacitive touch, 480×480 resolution. Clear icons, real-time dew-point indicator. Switchable light and dark UI themes.
Modbus & WiFi Connectivity

Standard RS485 Modbus RTU for BMS integration. Optional Wi-Fi module for remote control and cloud platform (Tuya/Smart Life or private cloud). Simultaneous protocol coexistence.
7-Day UI Customization

Custom boot logo, UI layout, color theme, default parameters (dew-point offset, valve type, Modbus map) within 7 days. Supports real estate branding and Legrand/Siemens faceplate compatibility.

Product Parameters

● Power Supply: 100-240VAC, 50/60Hz

● Max Load Current: 3A / 250VAC

● Built-in Room Temp. Control Range: 5°C - 35°C

● External Sensor Control Range: 5°C - 70°C (Optional/Not included)

● Temperature Display Accuracy: 0.1°C

● Operating Temperature: 0°C - 50°C

● Storage Temperature: -10°C - 60°C

● Dimensions: 86mm x 86mm x 13mm

Product Dimensions

Product Installation

Product Application Scenarios

In high-end villas and passive houses, the SAS965FCH consolidates control of diverse hydronic loops into a single display, replacing multiple wall-mounted interfaces. For commercial infrastructure, the controller supports two distinct deployment strategies: it can operate as a standalone decentralized controller using its built-in logic, or interface via Modbus RTU as a localized control terminal within a centralized PLC network. The SAS965FCH is the core control panel within the advanced radiant climate control solution, responsible for multi-terminal coordination and dew-point protection.

luxury villa

Apartments

Hotel

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FAQ

The SAS965FCH features standard RS485 Modbus RTU connectivity. Connect the RS485 A/B terminals to your BMS network, and configure the Modbus parameters (baud rate, parity, slave ID) through the thermostat settings menu. Refer to the Modbus integration guide for register mapping.

Wi-Fi setup is accessible from the network settings menu. Select your 2.4GHz Wi-Fi network, enter credentials, and the thermostat will connect. The connection status is displayed on the home screen. Remote access via Tuya/Smart Life is available once connected.

UI customization (boot logo, color theme, layout) is available through our OEM/ODM service channel. Submit your brand assets and requirements — we deliver customized firmware within 7 days for verified B2B partners.

480×480 pixels on a 4-inch capacitive touchscreen with clear iconography and switchable light/dark themes. Designed for easy readability and intuitive operation.

The SAS965FCH supports Modbus RTU and optional Wi-Fi. Zigbee is available on the SAS922BFCH (Hybrid) platform. Please select the appropriate model for your connectivity requirements.

The capacitive touchscreen is factory-calibrated and should not require recalibration under normal use. If calibration is needed, access the installer menu and follow the on-screen calibration steps.