Damper Maintenance

9. Round Duct Connections

Round duct connections to shall be attached with #8 sheet metal screws as follows:

•Ducts 22 in. dia. and smaller shall have three screws.

•Ducts larger than 22 in. dia. up to and including 24 in. dia. shall have five screws.

NOTE: All breakaway connections described may have duct sealant, PA2084T duct sealant adhesive manufactured by Precision, DP1010 water base duct sealant manufactured by Design Polymetrics, or Grey Pookie applied in accordance with SMACNA recommendations.

Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary, use mild detergents or solvents. If lubrication is desired for components such as axle bearings, jackshaft bearings and jamb seals, do not use oil-based lubricants or any other lubricants that attract contaminants such as dust.

Dampers and their electric/pneumatic actuator(s) must be maintained, cycled, and tested in accordance with:

•The latest editions of NFPA 80, 90A, 92A, UL864, and local codes.

•Actuator manufacturer recommendations.

Damper Trouble Shooting

The following is a possible cause and correction list for common concerns with the dampers.

Symptom	Possible Cause	Corrective Action
	Frame is out of round causing	Adjust frame such that it is round
	blades to bind on jamb seals
	Actuator linkage loose	Close damper, disconnect power, adjust
Damper does not		and tighten linkage

	Defective motor	Replace
fully open and/or	Defective motor	Replace
fully open and/or	Screws in damper linkage	Locate screws and remove
fully close	Screws in damper linkage	Locate screws and remove
	Actuator linkage hitting wall or floor	Damper installed too far into wall. Move
		out to line designated on damper label.

	Contaminants on damper	Clean with a non-oil-based solvent
		(see Damper Maintenance)

RRL, or TOR sensor	Heat	Push reset button located on backside
tripped		of RRL or TOR.

Damper does not	No power supplied to the actuator
operate

Actuator runs hot or	Actuator prohibited from reaching	Disconnect linkage from jackshaft,
makes a humming	end of stroke	open damper, power actuator to end of
noise		spring, tighten linkage. Verify amp draw.

Link separated	Heat	Replace link

SSFSDR-XXX, FSDR-XXX, SEFSDR-XXX specifications

Greenheck Fan is renowned for its commitment to delivering high-quality ventilation solutions, and the SEFSDR-XXX, FSDR-XXX, and SSFSDR-XXX series exemplify this tradition of excellence. These models are designed for diverse applications in commercial and industrial environments, ensuring effective air management alongside energy efficiency.

The SEFSDR-XXX series features a unique design tailored for energy recovery applications. Its innovative structure allows for heat exchange via advanced energy recovery ventilators, making it an ideal choice for maintaining indoor air quality while reducing energy costs. The models are equipped with EC motor technology that optimizes performance by adjusting to variable load conditions, which enhances overall energy savings.

Similarly, the FSDR-XXX series is engineered for dependable performance in exhaust and supply systems. This series incorporates a robust construction that withstands harsh environmental conditions, ensuring long-term reliability. One of the standout features of the FSDR-XXX models is their acoustic performance; they are designed to operate quietly without sacrificing airflow efficiency. This is critical for applications within schools, hospitals, and offices, where noise control is vital.

The SSFSDR-XXX series offers a specialized configuration for applications requiring sanitary ventilation. These models are built with smooth, cleanable surfaces that prevent the accumulation of dust and contaminants, making them suitable for environments like laboratories and food processing facilities. The use of stainless steel construction further enhances their durability and hygiene, ensuring compliance with strict health standards.

All three series feature customizable options that allow for tailoring performance to specific project needs. This includes various fan sizes, airflow configurations, and control systems compatible with building management systems, providing users with flexibility in installation and operation.

Integration of advanced airflow modeling technologies ensures that these fans provide optimal performance under varying operating conditions. Additionally, the fans are designed with user-friendly maintenance access, which minimizes downtime during servicing.

In summary, the Greenheck SEFSDR-XXX, FSDR-XXX, and SSFSDR-XXX series are outstanding choices for any ventilation need, combining advanced technologies, durability, and energy efficiency to deliver superior air management solutions across a broad range of applications.

9. Round Duct Connections