Quick Summary
Smart Fan Coil Unit Thermostat HTW-WF81-843 is designed for indoor fan coil unit systems in homes. It controls a three-speed fan and one heating or cooling valve. The unit works with two-pipe systems using simple on/off control logic. WiFi connection allows remote control and basic monitoring through a mobile app.
This page explains how the thermostat works in real HVAC use. It covers key functions, control logic, and main parameters in a clear way. It also helps users understand system matching and daily operation. Common questions and possible custom options are included for project reference.
Key Features
This part explains the main control functions and how they support stable FCU system use.
(01) WiFi application control
WiFi allows users to adjust settings from a mobile app. This reduces manual work on site. It supports remote use and improves daily control efficiency.(If you also need Modbus, please click here)
(02) 3-speed fan and valve control
Three fan speeds allow simple airflow adjustment in daily use. One valve output controls heating or cooling water flow. This setup fits most two-pipe fan coil systems.
(03) Programmable scheduling
Smart Fan Coil Unit Thermostat’s weekly programming allows automatic temperature control during the day. This helps reduce energy use in idle periods. It also keeps room comfort stable.
(04) Multi-language interface
Multiple language options make the interface easy to understand. This supports use in different regions. It also reduces training work after installation.
(05) RGB colorful LCD screen display
The RGB screen shows clear information in different light conditions. It improves readability and user experience. The design of Smart Fan Coil Unit Thermostat also fits modern indoor spaces.
Product Design and Display
This part shows the product appearance, screen layout, and installation view in a simple way.
Technical Specifications
This part lists key parameters that help with system selection and basic use.
| Parameter | Value |
|---|---|
| Power Supply | 95–240Vac, 50/60Hz |
| Power Consumption | WiFi 3W Max |
| Temperature Range | 5–95°C |
| Floor Limit | 20–90°C |
| Control Deviation | 0.5–10°C |
| Ambient Temperature | -5–50°C |
| Protection Level | IP20 |
| Warranty | 2 Years |
Wiring Diagram
This part shows the wiring reference for use in a standard fan coil unit system.
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 |
| 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-WF81-FC-xxx | If xxx=863, it means 3 fan speed+1 H/C valve, 2-pipe, Wifi |
Project Fit & Customization
This part explains system limits and possible adjustments for project use.
This model is not suitable for complex BMS systems without protocol support. It does not support modulating valves or advanced logic. It is not designed for large central control projects.
Despite these limits, some functions can be adjusted. Communication such as Modbus or BACnet can be added. External sensors and control logic can be discussed based on needs.
OEM support is available for branding and design changes. Logo printing, colour change, and labels can be customised. Packaging and interface updates are also possible.
Certifications and Compliance
This part shows that the product meets common European standards and test requirements.
Exhibition Moments
This part shows our participation in international HVAC exhibitions.
Frequently Asked Questions
Q1: Is this thermostat suitable for all FCU systems?
It is designed for standard two-pipe systems with on/off valves. It may not fit special systems. Please confirm system type before use.
Q2: Can it connect to a BMS system?
Smart Fan Coil Unit Thermostat version uses WiFi only. BMS protocols can be added if needed. This depends on project requirements.
Q3: Does it support external sensors?
The standard version uses an internal sensor. External sensors can be added by request. This helps in special installation cases.
Q4: Is it suitable for hotel use?
It can be used in small rooms or apartments. Extra functions like keycard may need customisation. Project needs should be checked.
Q5: What is the MOQ and sample policy?
We support samples for testing. Standard MOQ is 300 units. Smaller quantities like 100 units can be discussed.
Q6: How to place an order?
Contact us to confirm details 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 choosing 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.
