HVAC Controller Has Ethernet Connectivity

Quest Controls recently upgraded its Model 600 Lead/Lag HVAC Controller by adding built-in 10/100-Mbit/sec Ethernet connectivity. This upgrade “delivers advanced remote access, monitoring, and configuration capabilities, while helping organizations cut operating costs and improve energy efficiency across their remote facilities,” the company said when announcing the upgrade.

Since its introduction in early 2024, Model 600 has delivered intelligent HVAC sequencing and economizer control. The addition of Ethernet communication capability allows users of the controller to monitor and adjust system settings remotely via a password-protected web interface or Modbus TCP, “reducing the need for on-site service calls and enabling smarter environmental control from anywhere,” Quest Controls added.

“Whether you’re managing telecom, broadband, data centers, or power utility facilities, this controller is designed to meet your needs by providing comprehensive monitoring and control for multiple HVAC units,” the company stated. “It supports lead/lad or lead/standby configurations for two HVAC units and delivers flexibility to handle wall packs, rooftops, split systems, single-stage, dual-stage systems, and heat pumps with exceptional dependability.”

The enhanced Model 600 can control two independent HVAC units. For larger or more complex deployments, multiple Model 600 controllers can be networked together and integrated using a Quest TELSEC ESB2 or any Modbus poller. “This flexible architecture enables centralized management and coordinated operation across multiple HVAC zones, ensuring optimal performance and energy savings at every site,” the company emphasized.

Quest Controls pointed out the following characteristics and capabilities of the newly enhanced Model 600.

• Remote access: Users can monitor and configure HVAC operations remotely via Ethernet or Bluetooth.
• Scalable networking: Multiple units can be networked together and connected to a Modbus poller for coordinated, site-wide HVAC control.
• Energy optimization: Quest’s economizer control algorithm reduces compressor runtime and maximizes free cooling, resulting in lower energy bills and long-term operational savings.
• User-friendly interface: The web-browser interface, coupled with an intuitive display and keypad, simplifies configuration and monitoring.
• Application versatility: The Model 600 accommodates a range of facilities, from data centers and central offices to primary and secondary hubs, huts, and fiber hubs.

“Customers can now enjoy enhanced control and operational insight, whether on-site or remote,” commented Ken Nickel, Quest Controls’ executive vice president. “The addition of Ethernet to the Model 600 reflects our commitment to delivering smarter, more-efficient solutions for critical facilities.”