Quick Summary
The HTW-FC09-FVMN-24K PICV Thermostat is designed for fan coil systems. It controls 3-speed fans or EC fans and supports 2-pipe systems with 0–10V modulating valve control. The thermostat suits both heating and cooling operations. A built-in transformer provides a stable 24VDC output for PICV valves and supports reliable control logic.
This page explains how it works in practical projects. It covers control logic, parameter confirmation, and system integration details. It also outlines typical questions and project considerations. Guidance is included to help evaluate suitability and possible customisation options.
Key Functional Highlights
(This section introduces the main control functions and their engineering value in the fan coil system.)
(01) 3-speed fan and EC fan control
The thermostat supports both traditional 3-speed fans and EC fans. This helps adapt to different project layouts and reduces redesign work during system upgrades.
(02) 2-pipe 0–10V modulating valve control
It provides a smooth 0–10V output for PICV Thermostat control. This improves water flow stability and helps maintain steady room temperature under varying load conditions.
(03) Built-in transformer with 24VDC output
A built-in transformer supplies a stable 24VDC output for valve operation. This simplifies wiring and avoids the need for external power modules on site.
(04) RS485 Modbus communication
Modbus communication allows integration with building control systems. This supports central monitoring and helps improve operational visibility across multiple rooms.
(05) Dry contact input for keycard or FAS
The dry contact input supports keycard or fire alarm signals. This helps manage energy use and ensures safe system response during emergency situations.
If this feature is not required, one may refer to another model with an external sensor feature instead (please click → HTW-FC09-FVMN-24S); or another model with Wi-Fi communication (via Zigbee) (please click → HTW-FC09-FVMN-24ZB).
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 | 95~240Vac, 50/60Hz |
| Fan Relay Load | 5A |
| Sensor Type | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Communication | RS485 Modbus |
| Output | 0–10V + 24VDC output |
| Installation | Standard 86x86mm box |
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.)
| HTW-FC09-xxx | xx stands for |
| FVM | 0-10V EC fan + Modulating valve |
| 24 | with 24V output for 0-10V valve |
| WF | Wi-Fi |
| ZB | Zigbee communication |
| K/S | K = Keycard; S = External sensor |
| Example HTW-FC09-FVMN-24K: it stands for the model with EC fan, 0-10V valve control, a built-in transformer featuring 24VDC output, Modbus and Keycard. For more details, kindly contact us to confirm availability. | |
Project Fit & Customisation
(This section describes project suitability, system limitations, and available customisation options.)
This PICV Thermostat is not suitable for standalone heating systems without fan coils. It does not support BACnet communication in this version. Projects requiring wireless control or app-based access will need additional configuration.
Despite these limitations mentioned above, function upgrades can be discussed. Wi-Fi or BACnet options may be added through ODM development. Control logic adjustments for special valves or signals can also be evaluated on a case-by-case basis.
OEM services are also available for project branding. Logo printing, colour changes, and label updates can be supported. Packaging and interface customisation can also be discussed for project consistency.
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 PICV Thermostat work with EC fans?
Yes, it supports both EC fans and 3-speed fans. This makes it suitable for different fan coil configurations. It helps reduce selection complexity in mixed projects.
Q2: Does it support BMS integration?
Yes, it supports RS485 Modbus communication. This allows connection to most building management systems. Data reading and control commands can be handled centrally.
Q3: How does the 24V output help in projects?
The built-in 24V output powers PICV valves directly. This reduces the need for external transformers. It helps simplify wiring and improves installation efficiency.
Q4: Can the dry contact be used for hotel keycard systems?
Yes, the dry contact input can be defined as a keycard input. It can also be used for fire alarm signals. This helps improve energy control and safety response.
Q5: What is the MOQ, and do you support samples?
We support sample orders for testing. Standard MOQ is 300 units. Smaller trial orders, like 100 units, can be discussed.
Q6: How can I place an order and arrange shipping?
Please contact us to confirm requirements and receive a PI. Payment methods include TT, PayPal, and Visa. Terms such as EXW, FOB, and DAP are supported.
Q7: How long does it take to prepare the products?
Non-custom samples are shipped within 7 days. Custom orders usually take 3–5 weeks. Bulk orders around 300 units typically need one month.
Q8: What shipping methods are available?
Courier delivery, like FedEx or DHL, takes about 7 days. Air freight also takes around 7 days. Sea shipping usually takes about one month.
Need Help Choosing the Right Model?
If you are unsure which PICV Thermostat suits your project, feel free to contact us. We can help review your system and suggest a suitable solution.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
Fan coil projects often require stable flow control and clear system integration. This PICV Thermostat manages fan operation and modulating valve control with a built-in 24V output. It helps improve system stability, supports central monitoring, and simplifies long-term facility management.
