Quick Summary
The HTW-31-F10-2/4 is a digital temperature controller for fan coil systems. It controls 3-speed fans and on/off valves in dedicated 2-pipe or 4-pipe models. It supports heating and cooling with stable switching logic.
This page explains its control functions and how they support FCU system stability. It also confirms key parameters and typical wiring logic for projects. Common questions and model selection guidance are included. Customisation options may also be discussed based on project needs.
Key Functional Highlights
(This section introduces the main control functions and their engineering value of this fcu thermostat.)
(01) 3-speed fan control
This FCU thermostat manages low, medium, and high fan speeds, adjusting airflow to match actual room demand. It improves comfort, saves energy, and keeps fan operation stable during daily use.
(02) 2/4 pipe on/off valve control
Each sub-model is designed for either 2-pipe or 4-pipe systems. This digital temperature controller manages heating and cooling valves based on system design, preventing wiring mistakes and ensuring smooth operation with fewer commissioning issues.
(03) Setpoint limitation
The setpoint limitation function restricts the adjustable temperature range. It helps prevent extreme settings that may affect system performance. This is useful in hotels or shared spaces. It also supports energy-saving policies in daily operation.
(04) White or Black display option
This model offers both display styles, to be precise, it provides a white display for bright environments and a black display to reduce glare in low-light conditions, ensuring visual comfort in different installation scenarios.
If the project requires a BACnet feature for building management, one may consider other models (please click → HTW-31-F10-2B/4B).
Product Design and Display
(This section shows the appearance, screen interface, or installation dimensions of this fcu digital temperature controller.)
Technical Specifications
(This section lists the key technical parameters relevant to this fcu thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 220Vac, 50/60Hz |
| Fan Relay Load | 5A |
| Sensor Type | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Installation | 86x86mm box or EU round box |
| Warranty | 2 Years |
Wiring Diagram
(This section provides the wiring diagram for this temperature controller in the relevant fan coil control system.)
Model Code Guide
(This section explains what configuration the model code of this FCU digital temperature controller refers to.)
| Fan coil series | xx stands for |
| 2/4 | 2 for 2-pipe on/off; 4 for 4-pipe on/off system |
| M | Modulating valve control |
| W | Wi-Fi |
| N/B | N for Modbus; B for BACnet |
| K/E | K for Keycard; E for External sensor |
| Example HTW-WF11-FC-xx: if xx = 2EN, it stands for a 3-speed fan, 2-pipe system with on/off valve control, external sensor function, and Modbus communication. Most sub-models are ready-made. Kindly contact us to confirm availability. | |
Project Fit & Customization
(This section describes project suitability, system limitations, and available customization options.)
This digital temperature controller is not suitable for BMS integration projects. It does not support Modbus or BACnet communication. It also does not provide app or remote control functions. Projects requiring central monitoring or smart control should consider other models.
Despite these limitations mentioned above, function upgrades may be discussed. Communication protocols like Modbus or WiFi may be added in ODM projects. External sensors or keycard logic may also be considered. Final configuration depends on technical feasibility and project quantity, so please feel free to get in touch with us for discussion.
OEM customisation is also available for branding needs. We support logo printing, colour changes, and label adjustments. Packaging and interface layout may also be customised. These options help match different market or project requirements.
Certificates and Compliance
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Frequently Asked Questions
Q1: Is this model suitable for both 2-pipe and 4-pipe systems?
No, each version is designed for a specific system type. One model HTW-31-F10-2 supports 2-pipe, another HTW-31-F10-4 supports 4-pipe. Please confirm system type before selection.
Q2: Does this fcu thermostat support external sensors?
This model uses a built-in sensor only. External sensor input is not included. For projects needing remote sensing, other models are recommended.
Q3: Can it connect to a BMS system?
No, this digital temperature controller is standalone. It does not support Modbus or BACnet. For BMS integration, communication models are required.
Q4: How does temperature switching work in heating and cooling?
The thermostat switches based on system wiring and mode setting. It controls valves according to temperature demand. This ensures stable heating or cooling output.
Q5: What is the MOQ and can we get samples?
We support sample orders for testing. Standard MOQ is 300 units, but smaller quantities like 100 units may be discussed.
Q6: How do we place an order and arrange shipping?
Please contact us to confirm your requirements. We will issue a PI after confirmation. Payment supports TT, PayPal, and Visa with EXW, FOB, DAP terms, etc.
Q7: How long does it take to prepare the products?
Standard samples are ready within 7 days. Custom models require 3–5 weeks depending on changes. Bulk orders like 300 units usually need about one month.
Q8: What shipping methods are available?
Courier delivery is commonly used and takes about 7 days. Air freight is also around 7 days. Sea shipping usually takes about one month.
Need Help Choosing the Right Model?
If you are unsure which model fits your system, please feel free to contact us. We can review your project and suggest a suitable option~
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
In FCU projects, stable room control and simple operation are often required. This model acts as a basic fcu thermostat for fan and valve control. It helps maintain reliable operation and reduces maintenance complexity in daily facility management.
