Quick Summary
The HTW-WF71-863S is designed for indoor 4-pipe fan coil unit systems in homes and light commercial spaces. It controls a three-speed fan, one heating valve, and one cooling valve. The unit uses simple on/off logic to manage room temperature. WiFi and Modbus support both remote control and system integration.
This Modbus Fan Coil Unit Thermostat is used in projects that need stable temperature control and simple BMS connection. The page explains key functions, control logic, and main parameters in a clear way. It also helps users match the thermostat with system needs. Common questions and custom options are included for reference.
Key Features
These functions support stable operation and flexible use in 4-pipe fan coil systems.
(01) WiFi application control
WiFi allows users to adjust settings through a mobile app. This reduces manual work on site. The Modbus Fan Coil Unit Thermostat improves daily control efficiency. If you don’t need Modbus, kindly check here: WF71-863
(02) 4-pipe system control
The thermostat controls one heating valve and one cooling valve. It supports smooth switching between heating and cooling. This setup fits common 4-pipe FCU systems.
(03) 3-speed fan control
The thermostat supports low, medium, and high fan speeds. This helps adjust airflow based on room demand. The Modbus Fan Coil Unit Thermostat keeps airflow stable.
(04) Programmable scheduling
Weekly programming allows automatic temperature changes during the day. This helps reduce energy use when rooms are empty. It also keeps indoor comfort stable.
(05) Modbus communication
Modbus allows connection to BMS systems. It supports central monitoring and control. This Modbus Fan Coil Unit Thermostat fits building management projects.
Product Design and Display
The design is simple and modern for indoor use. The interface is clear and easy to read. The RGB screen shows clear information. It fits standard wall boxes and common installation conditions.
Technical Specifications
The table below shows key parameters for system selection and operation.
| Parameter | Value |
|---|---|
| Power Supply | 95–240Vac, 50/60Hz |
| Power Consumption | WiFi 3W Max |
| Temperature Range | 5–95°C (41–203°F) |
| Floor Limit | 20–90°C (68–194°F) |
| Control Deviation | 0.5–10°C (Factory +1°C) |
| Ambient Temperature | -5–50°C |
| Protection Level | IP20 |
| Warranty | 2 Years |
Wiring Diagram
The diagram shows typical wiring for 4-pipe fan coil systems. It includes fan speed outputs and separate heating and cooling valve connections. It also shows Modbus communication wiring.
Model Code Guide
(This section explains what each part of the model code means for system configuration.)
| Model | Application |
| 843 | Timer task + 2-pipe system+ Wifi |
| 853S | Timer task + 2-pipe system + Potential-free output- limit sensor (optional) + Room card (optional) +Wifi+Modbus |
| 863 | Timner task + 4 pipe system + Potential-free output- limit sensor (optional) + Room card (optional） +Wifi |
| 963 | Floor heating & fan coil, weekly programming+ Potential-free output + Timer task+ limit sensor (optional)+ Room card (optional) +Wifi |
| S | 485Modbus |
| Example HTW-WF71-FC-xxx | If xxx=863S, it means 3 fan speed+1 H+1 C valve, 4-pipe, Wifi, Modbus |
Project Fit & Customization
This model is not suitable for systems that require modulating control. It does not support 0–10V output or advanced PID logic. It may also not fit systems that need multi-stage control.
Despite these limits, some functions can be adjusted. Communication settings and control logic can be modified. Interface layout and system settings can also be discussed.
OEM support is available for branding and design updates. Logo printing, colour changes, and labels can be customised. Packaging and interface layout can also be adjusted.
Certifications and Compliance
The thermostat meets common European standards and related test requirements.
Exhibition Moments
Our team participates in international HVAC exhibitions and industry events.
Frequently Asked Questions
Q1: Can this thermostat be used for 4-pipe fan coil systems?
Yes, it is designed for 4-pipe FCU systems. It controls heating and cooling valves. Please confirm wiring before installation.
Q2: Does it support BMS integration?
Yes, it supports Modbus communication. This allows connection to building systems. The Modbus Fan Coil Unit Thermostat supports central monitoring.
Q3: Can it be controlled remotely?
Yes, WiFi allows app control. Users can adjust settings remotely. It is suitable for daily use.
Q4: Is it suitable for residential use?
Yes, it fits homes and small commercial spaces. Installation is simple. Daily use is easy.
Q5: What is the MOQ and can I get samples?
We support samples for testing. Standard MOQ is 300 units. Smaller quantities like 100 units can be discussed.
Q6: How to place an order and arrange shipping?
Contact us to confirm requirements and receive a PI. Payment supports TT, PayPal, and Visa. Shipping terms include EXW, FOB, and DAP.
Q7: How long does production take?
Non-custom samples ship within 7 days. Custom orders take about 3–5 weeks. Bulk orders around 300 units need about one month.
Q8: What shipping methods are available?
Express delivery takes about 7 days. Air freight is similar. Sea freight takes about one month depending on route.
Need Support?
If you are planning a project or selecting a model, please contact us. We can help review your system and suggest suitable options.
Related Thermostat Models
This section lists related thermostat models for different system types and integration needs, helping you choose a suitable option for your project.
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