Quick Summary
Smart wifi thermostat HTW-WF81-863 is designed for indoor fan coil unit systems in homes and light commercial spaces. It controls a three-speed fan with separate heating and cooling valves. The unit supports four-pipe systems using simple on/off control logic. WiFi allows remote access through a mobile application.
This Smart Wifi Thermostat is used in projects that need flexible room control and simple operation. The page explains key functions, control logic, and main parameters in a clear way. It also helps users match the thermostat with system requirements. Common questions and custom options are included for project reference.
Key Features
These functions support stable operation and practical use in four-pipe fan coil systems. (If you need 2 pipe system, please check here)
(01) WiFi application control
WiFi allows users to adjust settings through a mobile app. This reduces manual work on site. The Smart Wifi Thermostat improves daily control efficiency.
(02) 3-speed fan and dual valve control
Three fan speeds allow simple airflow adjustment. Separate outputs control heating and cooling valves. This setup matches standard four-pipe fan coil systems.
(03) Programmable scheduling
Weekly schedules allow automatic temperature control during different periods. This helps reduce energy use when rooms are empty. It also keeps indoor comfort stable.
(04) Multi-language interface
Multiple language options make operation easy for users. This supports projects in different regions. It also reduces training time after installation.
(05) WiFi communication
WiFi supports remote monitoring and control through an app. The Smart Wifi Thermostat allows users to manage rooms more easily. It improves overall user experience.
Product Design and Display
The design focuses on a clean look and simple layout. The screen is clear and easy to read in daily use. The thermostat fits standard wall boxes and common indoor environments.
Technical Specifications
The table below shows key parameters for system selection and basic 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 a four-pipe fan coil system. It includes fan control and separate heating and cooling valves.
Model Code Guide
The table below helps explain model options and system configuration.
| Model | Application |
| 743 | Timer + 2-pipe system |
| 853 | Timer + 2-pipe + limit sensor + room card + WiFi |
| 863 | Timer + 4-pipe + limit sensor + room card + WiFi |
| 963 | Floor heating & FCU + timer + limit sensor + room card + WiFi |
| S | Rs485 Modbus |
| Example HTW-WF81-FC-xxx | If xxx=863, it means 3 fan speed, 4-pipe system, WiFi |
Project Fit & Customization
This model is not suitable for systems that need modulating valve control. It does not support advanced PID control logic. It may also not fit large central systems without protocol changes.
Despite these limits, some functions can be adjusted. Communication options can be modified based on project needs. Sensor inputs and control logic 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 test requirements.
Exhibition Moments
Our team takes part in international HVAC exhibitions and industry events.
Frequently Asked Questions
Q1: Can this thermostat work with four-pipe systems?
Yes, it supports standard four-pipe fan coil systems. It controls both heating and cooling valves. Please confirm wiring before installation.
Q2: Does it support remote control?
Yes, WiFi allows app control. Users can adjust settings remotely. The Smart Wifi Thermostat is suitable for daily use.
Q3: Can it be used in residential projects?
Yes, it is designed for homes and small commercial spaces. It fits common indoor environments. Installation is simple and practical.
Q4: Is it suitable for hotel projects?
It can be used in small hotel rooms. Larger systems may need extra functions. Project needs should be confirmed.
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 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.
More product details, please click here directly:
In HVAC projects, stable control and clear operation are important. This Smart Wifi Thermostat manages fan speed and dual valve output effectively. It helps improve system stability and supports comfortable indoor environments. Learned more fan coil thermostat.
