Australia
New Zealand
Greece
Flexible, high‑capacity zone control for HVAC and airflow‑based applications
The ZN551 Zone Controller provides reliable, distributed control for zone‑level HVAC applications, offering expanded I/O capacity, graphical programming, and seamless WebCTRL® integration to support comfort and energy‑efficient operation.
The ZN551 is a fully programmable, native BACnet Advanced Application Controller (AAC) designed for controlling a single zone in a building. The ZN551 is well suited for VAV, heat pump, unit ventilator and other packaged HVAC applications. It communicates on an EIA-485 LAN using BACnet MS/TP communications and connects seamlessly to the WebCTRL® building automation system.
The controller supports up to 11 total points, including 5 binary outputs, 5 universal inputs, and 1 analog output, enabling flexible zone‑level control.
Supports native BACnet over MS/TP communications, allowing integration into BACnet‑based building automation systems.
Uses a fast, powerful, and fully distributed control architecture, allowing the controller to operate independently of other system devices.
Firmware upgrades can be performed remotely, and startup and commissioning are simplified using WebCTRL® system user interfaces.
| Document Name | Description | Document Type | Language | Action |
|---|---|---|---|---|
| Spec Sheet | FAQs – ZN551 Zone Controller Spec Sheet | English | Download |
It is designed for zone‑level HVAC applications, including fan coil units, lighting control, and exhaust fan systems.
Yes. EIKON® graphical programming allows full customization of control logic within the controller’s I/O capacity.
Yes. Its fully distributed architecture allows standalone operation while remaining integrated with WebCTRL®.
Yes. Its expanded I/O capacity, compact design, and open communications make it suitable for both new installations and retrofit applications.
Get directed to our Business Development team to start the authorization process and discuss sales support.
Get specialized help with system sizing, load
calculation analysis, and technical data required for project design.
Request support for warranty claims,
scheduled maintenance, and genuine spare
parts ordering.
For more information : ahi@ahi-carrier.com