Honeywell Damper Adjustment Guide

Rectangular and Round Dampers

• Honeywell produces a variety of rectangular dampers and are generally used with electronic zoning systems and the Honeywell “TrueZONE” system. These dampers are available in square parallel blade models that range from 6-by-8 inches up to 24-by-24 inches, as well rectangular parallel blade models that range from 8-by-6 inches to 24-by-22 inches. Rectangular dampers have a spring-open and power-closing system. Round Honeywell dampers come in sizes that vary from 5 inches to 20 inches in diameter. The round dampers have a power close-spring open and use a gasket to reduce low air leakage.

Open Honeywell Dampers

• Honeywell dampers can be manually adjusted to increase or decrease the air flow through the damper and into the duct. Further open the dampers by loosening the wing nut on the damper and slowly adjusting the lower lever towards the right until the desired change is reached. Tighten the wing nut when finished; if the lower lever is moved all the way to the right, the damper will open 50 percent when the power is turned off.

Closing the Dampers

• If you do not wish to completely close the damper, loosen the wing nut and adjust the lower lever to the left to the desired position and then tighten the wing nut. When the lower lever is set all the way to the left, the damper will close to approximately 40 percent when the power is turned on.

Additional Adjustment

• Whenever further damper adjustment is desired, remove the actuator from the Honeywell damper and then remove the wing nut completely. Take out the retaining ring and then take out both the upper and lower levers. Once the upper lever is out, you can put the lower lever back in and then reassemble the retaining ring and the wing nut. This will increase the rotation of the damper by 15 percent.