Flexible control architectures for commercial HVAC fans
Q-PAC expands its control panel portfolio to support simplified integration, local power isolation, and adaptable control strategies for commercial HVAC fan systems.
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Q-PAC has introduced two additional control panel configurations for its commercial HVAC fan systems, extending integration options for engineers and contractors working across retrofit, upgrade, and new-build applications.
Expanding control options for varied HVAC system designs
Commercial HVAC installations increasingly require flexibility in how fans are powered, controlled, and integrated into existing building automation systems. To address these requirements, Q-PAC has added Fan-Only and Fused Disconnect configurations to its existing range of Basic and Premium Control Panels.
The new options are intended to accommodate projects where centralized or third-party control strategies are preferred, while still maintaining consistent fan operation and electrical protection.
Fan-Only configuration for external control strategies
The Fan-Only option is designed for applications where fan operation is managed directly by an existing building management system (BMS) or third-party controller. In this configuration, power and control signals terminate at a single connection point on the Q-PAC Fan Controller.
The Fan Controller manages all motors within the Multimotor Plenum Fan (MPF) as a unified fan assembly, simplifying wiring and coordination. This approach supports retrofit projects, cost-sensitive installations, and systems where custom or site-specific control logic is required without deploying a dedicated fan control panel.
Fused Disconnect option for local power isolation
The Fused Disconnect configuration adds local power isolation and overcurrent protection while preserving flexibility for additional control equipment. It incorporates a Schneider Electric VisiPacT fused safety switch, providing a lockable, line-of-sight disconnect to support maintenance and emergency procedures.
The switch is tested to performance levels exceeding standard NEMA requirements and is intended for use in commercial and industrial HVAC environments where reliable isolation and compliance with safety practices are required. This configuration serves as a foundation for integrating external control hardware while ensuring electrical protection at the fan level.
Role of Basic and Premium control panels
Q-PAC’s Basic and Premium Control Panels remain available for projects requiring integrated fan control. Both are supplied fully assembled, factory-wired, and tested, and include a Hand-Off-Auto selector, safety circuitry, and fan status indication.
The Premium Control Panel, rated to UL 508A, adds a touchscreen HMI, BACnet MS/TP and IP communication, safety interlocks, fireman override functionality, and real-time system monitoring. It is intended for applications requiring deeper integration into a building automation system and expanded diagnostic capability.
The Basic Control Panel provides essential functionality and protection for simpler installations, including smaller air handlers and systems with limited automation requirements.
Application context and system integration
Across all configurations, the control options are designed to support consistent airflow management, coordinated multimotor operation, and compatibility with a range of HVAC system architectures. By offering multiple control approaches—from fully integrated panels to minimal interface solutions—Q-PAC enables system designers to align fan control strategies with project scope, automation level, and lifecycle considerations.
These additions reflect a broader trend toward modular HVAC system design, where control infrastructure can be tailored to operational requirements while maintaining standardized fan hardware and electrical interfaces.
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