Which ViviD Model Should You Choose?
Choose ViviD-F for conventional 2-pipe or 4-pipe FCU systems with on/off valve control and a 3-speed fan.
Choose ViviD-PF when the FCU uses a modulating valve with a 3-speed fan.
Choose ViviD-FW for a 2-pipe FCU combined with floor heating and a Tuya-based Wi-Fi application.
For a project using a different fan motor, valve actuator, or power supply, the model should be checked against the actual terminal-unit wiring and control requirements before selection.
Applications
The ViviD Series is designed for room-level HVAC control where a fan coil thermostat needs to combine local temperature adjustment with scheduling, remote access, or building automation integration.
Typical applications include:
Hotel rooms and hospitality buildings requiring local temperature control and remote management
Office buildings using 2-pipe or 4-pipe fan coil units
Commercial buildings with room-by-room HVAC control
Residential buildings using hydronic fan coil systems
Apartments and residential communities requiring programmable room temperature control
Building automation projects where compatible models are connected through RS-485 and Modbus-RTU
FCU + floor heating systems using the ViviD-FW model
The thermostat can also be incorporated into broader HVAC and building automation projects. For building-level applications, relevant HaiLin solutions include hotel building automation, commercial building solutions, smart hospital solutions, and smart laboratory solutions.
Connectivity and Building Automation
The ViviD Series can be used as a standalone room thermostat or as part of a connected HVAC control system, depending on the selected model.
Wi-Fi connectivity provides remote access through the supported mobile application, allowing users to adjust room temperature and manage thermostat settings without being physically present in the room.
For building automation applications, the thermostat provides an RS-485 interface and supports integration through the Modbus-RTU protocol. This allows compatible ViviD models to communicate with a building automation system for centralized HVAC management.
The combination of local touchscreen operation, Wi-Fi remote access, and RS-485 communication makes ViviD suitable for projects that require both room-level control and centralized building management.
Installation and Selection Notes
The ViviD Series uses an 86 × 86 mm wall-mounted format with a 60 mm mounting-hole spacing. Before installation, the selected thermostat model should be matched with the FCU piping configuration, valve type, fan control method, power supply, and communication requirements.
Because terminal assignments may differ between models, the wiring diagram provided for the specific ViviD model should be followed during installation.
For projects replacing an existing thermostat, installers should also verify the existing FCU valve actuator and fan wiring before selecting the replacement model.
FAQ
What is the ViviD Series Fan Coil Thermostat?
The ViviD Series is a fan coil thermostat with a color touchscreen designed for room temperature control. Depending on the model, it supports 2-pipe or 4-pipe FCU systems, on/off or modulating valve control, 3-speed fan control, Wi-Fi, and RS-485 communication.
Is ViviD suitable for 2-pipe and 4-pipe FCU systems?
Yes. ViviD-F and ViviD-PF support both 2-pipe and 4-pipe FCU configurations according to the current model list. ViviD-FW is designed for a 2-pipe FCU combined with floor heating.
Does the ViviD thermostat support Wi-Fi?
Yes. The model list specifies RS-485 + Wi-Fi communication for ViviD-F and ViviD-PF, while ViviD-FW is specified as RS-485 + Wi-Fi (Tuya). The available remote-control functions depend on the selected model and supported application.
Is ViviD suitable for hotels and commercial buildings?
Yes. Its touchscreen interface, scheduling, remote-control capabilities, and building automation integration make the series suitable for room-level HVAC control in hotels, offices, commercial buildings, and residential applications.
How do I choose the right ViviD model?
Model selection should be based primarily on the FCU configuration, valve type, fan control method, floor-heating requirement, and communication requirements. ViviD-F is for on/off valve control, ViviD-PF is for modulating valve control, and ViviD-FW is for FCU + floor heating applications.
