EWC Controls CLBD-14 Damper

The EWC Controls CLBD-14 is a professional-grade 14-inch round constant load bypass damper engineered to maintain optimal static pressure in multi-zone HVAC applications. As the direct replacement for the legacy SPRD-14 and PRD-RD-14 models, this unit effectively manages HVAC airflow relief when individual zone dampers close, preventing excessive static pressure build-up that can lead to blower motor strain and increased duct noise. Built with a durable galvanized 13-gauge aluminum construction, the CLBD-14 features a unique magnetic latch and a calibrated spring-tension regulator that allows for precise bypass damper adjustment from 0.3" WC to 0.8" WC via a simple setscrew. With an airflow capacity rated up to 1800 CFM, this barometric bypass damper ensures consistent system performance across both constant and variable-speed systems. Its versatile design allows for installation at any angle or orientation within the bypass ductwork, streamlining the setup for field technicians and contractors.

• Direct Replacement: Seamlessly replaces older SPRD-14 and PRD-RD-14 models without major ductwork modifications.
• Enhanced Static Control: Provides reliable static pressure relief to protect the heat exchanger and evaporator coil during partial zone calls.
• Simplified Calibration: Features a visible static pressure indicator window and a blade position indicator for fast, accurate field tuning.
• Flexible Installation: The constant-load spring design eliminates the need for weighted arms, allowing 360-degree mounting flexibility.
• High Flow Capacity: Rated for 1800 CFM at 1400 FPM, making it suitable for large residential and light commercial 14-inch bypass runs.

How do I set the static pressure on the EWC CLBD-14?
Calibration is handled by turning the adjustment knob to increase or decrease the force on the damper blade. Technicians should monitor the smallest zone for airflow noise and adjust the set-point until the desired balance is achieved.

Can this damper be used with variable speed blowers?
Yes, the constant load bypass damper is specifically designed to work with both constant-speed and variable-speed HVAC units to move excess air back to the return plenum or a dump zone.

Does the CLBD-14 require a power supply?
No, this is a barometric/mechanical damper that operates based on air pressure differentials and spring tension, requiring no electrical wiring or actuators.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.