Quick Summary
The HTW-31-F13-4 fan coil thermostat is designed for 4 pipe fan coil systems. It controls a 3 speed fan and separate heating and cooling valves. This fan coil thermostat supports heating and cooling modes, with programmable control and stable room temperature management for daily HVAC operation.
This page explains how this fan coil thermostat works in real projects, including control logic, wiring reference, and key parameters. It also highlights where it fits, what to check before selection, and typical project questions to support decision making.
Key Features
(This section explains the core control functions and their practical value.)
(01) 3-speed fan control
This fan coil thermostat supports low, medium, and high fan speeds. It allows airflow to match room demand. This improves comfort and helps reduce unnecessary energy use in daily operation.
(02) 4 pipe heating and cooling control
This fan coil thermostat controls heating and cooling valves separately. It suits systems where both are available at the same time. This improves flexibility and avoids manual seasonal switching. For the 2-pipe system thermostat, you can refer to this link: HTW-31-F13-2.
(03) Programmable operation
The programmable function allows temperature settings based on time schedules. This helps reduce manual adjustment and improves energy efficiency. It is useful in offices, hotels, and residential projects.
(04) Surface mounting design
The surface mounting structure simplifies installation. It avoids complex wall cutting and reduces labour time. This is practical for retrofit projects and quick deployment in finished interiors.
Product Design and Display
(This section shows the product’s dimensions and the interface layout.)
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 100~240Vac |
| Frequency | 50/60Hz |
| Accuracy | ±0.5°C |
| Sensor | NTC 3950, 10K |
| Setpoint Range | 5~35°C |
| Ambient | 0~50°C |
| Humidity | 85% |
| Protection Class | IP30 |
Wiring Diagram
(This section provides the wiring reference diagram for correct installation.)
Model Code Guide
(This section explains what configuration the model code refers to.)
| Fan coil series | xx stands for |
| EC | EC fan |
| 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 explains where the product can be used, its limits, and OEM/ODM options.)
This fan coil thermostat is suitable for standard 4 pipe FCU systems with on/off valves. It is not suitable for projects requiring BMS communication or modulating valve control. If central control or advanced integration is needed, other models should be considered.
Despite these limits mentioned above, ODM function customisation can be discussed. Options may include communication protocols, control logic adjustments, or sensor configurations, depending on project requirements and feasibility.
OEM customisation is also supported. This includes logo printing, colour changes, and label adjustments. These options help match project branding and improve consistency across installations.
Certificates and Compliance
Frequently Asked Questions
Q1: Is this fan coil thermostat suitable for 4 pipe systems?
Yes, it is designed for 4 pipe systems and controls heating and cooling valves separately for stable operation.
Q2: Can it control fan speed automatically?
Yes, it supports both manual and automatic fan speed control based on room temperature conditions.
Q3: Is it easy to install?
Yes, the surface mounting design simplifies installation and reduces labour time, especially in retrofit projects.
Q4: What is the MOQ and can we get samples?
We support sample orders. Standard MOQ is 300 units. Smaller trial quantities may also be discussed.
Q5: How do we place an order?
Please contact us with your requirements. We will provide a PI. Payment supports TT, PayPal, Visa, and more. Terms include EXW, FOB, DAP.
Q6: How is delivery arranged?
Courier delivery is recommended and takes about 7 days. Air freight is similar, while sea shipping takes around one month depending on location.
Related Thermostat Models
For projects requiring WiFi or Modbus control, consider alternative models in our range. Contact us to discuss the most suitable solution.
Or refer to below links as well:
This fan coil thermostat is a practical choice for standard 4 pipe FCU systems where simple, stable control is required. It suits projects that prioritise reliability, easy installation, and cost control over advanced integration. 【More models: fan coil thermostat】
