Quick Summary
This HTW-WF11-3AFCS programmable thermostat is designed for FCU and 3A water heating use. It supports 3-speed fan control and 2-pipe on/off valve control. The unit works with 100–240 VAC power and uses an NTC sensor. It handles both cooling and heating under standard fan coil system operation.
This programmable thermostat page explains how the model works in real projects. It covers control logic, function value, and key parameters. It also shows typical use and possible custom options for project needs.
Thermostat Functional Highlights
(This section introduces the main control functions and their engineering value in the specific HVAC system.)
(01) Suitable for FCU + 3A Water Heating System
This programmable thermostat can run with FCU systems, 3A water heating systems, or both together. It suits different room types and helps keep a clear control approach across projects. It also improves system consistency and reduces selection complexity in mixed applications.
If the water heating feature is not required, one may refer to this 2-pipe Wi-Fi fan coil thermostat instead (click → HTW-WF11-FC-2W).
(02) 3-speed fan control
Three fan speeds give simple airflow adjustment during operation. This helps match different comfort needs and reduces noise during low load conditions.
(03) 2-pipe on/off valve control
This programmable thermostat uses on/off control for water flow. This matches common FCU layouts and helps keep installation simple. It also improves reliability and reduces control complexity on-site.
(04) Wi-Fi app control
This programmable thermostat comes with a Wi-Fi feature, which allows remote control through a mobile app. We can adjust settings without going to the room, which improves daily operation.
(05) Weekly programming function
It is a programmable thermostat, so naturally, it supports a built-in schedule that can control temperature by time periods. It reduces manual adjustment and supports regular daily routines. This feature helps keep room conditions stable and improves energy use over time.
Product Design and Display
(This section shows the thermostat appearance, screen interface, or installation dimensions of this specific model.)
Technical Specifications
(This section lists the key technical parameters relevant to this thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240 Vac, 50/60Hz |
| Fan Relay Load | 5A |
| Sensor Type | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-point Range | 5–35°C |
| Installation | 86×86mm or EU box |
| Warranty | 2 Years |
Wiring Diagram
(This section provides the wiring diagram for this thermostat in the relevant HVAC control system.)
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 |
| 24 | Powered by 24V, or with 24V output for 0-10V valve |
| 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 & Customisation
(This section describes project suitability, system limitations, and available customisation options.)
This programmable thermostat is not suited for full BMS integration. It does not support Modbus or BACnet communication. It is also not designed for systems needing 0-10V EC fan or 0-10V modulating valve control or advanced control logic.
Despite these limits, function upgrades can be discussed. Wi-Fi or control options may be adjusted for project needs. Software behaviour and interface can also be refined through ODM cooperation.
OEM options are also available for project use. Logo printing, colour change, and label design can be arranged. Packaging and display details can match project branding if required.
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: Can this programmable thermostat work with both cooling and heating systems?
Yes, it is designed for FCU and 3A water heating systems, so naturally, it supports both heating and cooling modes in FCU setups. It can also run heating only, depending on how the setting is.
Q2: Does it support external sensors?
This model uses a built-in sensor as standard. External sensor support depends on the selected version and project setup.
Q3: Can it connect to a BMS system?
No, this version is not for BMS use. It is designed for standalone use or simple Wi-Fi control.
Q4: How do I choose the right model for my project?
It depends on fan type, pipe system, and control needs. It is best to confirm wiring and use case before selection.
Q5: What is the MOQ, and do you support samples?
We support samples for testing. MOQ is usually 300 units, but smaller trial orders, like 100, can be discussed.
Q6: How to place an order and arrange shipment?
After confirming details, we provide a PI. Payment can be TT, PayPal, or Visa. 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 typically take one month.
Q8: What are the shipping options?
Courier delivery takes about 7 days to door. Air freight is similar. Sea freight takes about one month, depending on destination.
Need Help Choosing the Right Model?
If you have a project, please feel free to contact us. We can help check model choice and confirm application details~
Related Thermostat Models
(just click it → ) Wi-Fi Thermostat | Modbus Thermostat | BACnet Thermostat
Final Note: In HVAC projects, steady room control and simple use are often needed. This programmable thermostat manages fan coil units and basic valve control. It helps keep daily operation stable and supports simple remote management for building use.
