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Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Receiving and Handling
Upon receiving dampers, check for both obvious
and hidden damage. If damage is found, record all
necessary information on the bill of lading and file
a claim with the final carrier. Check to be sure that
all parts of the shipment, including accessories, are
accounted for.
Dampers must be kept dry and clean. Indoor storage
and protection from dirt, dust and the weather is highly
recommended. Do not store at temperatures in excess of
100°F (38°C).
Safety Warning
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury
or death. Read the installation, operating, and
maintenance instructions thoroughly before installing or
servicing this equipment.
Table of Contents
Pre-Installation Guidelines . . . . . . . . . . . . . . 2
Multi-Section Assembly . . . . . . . . . . . . . . . 3
Counterbalance Adjustment . . . . . . . . . . . . 4-7
EM/GM-30, 31, 32 . . . . . . . . . . . . . . 4-5
EM-10, 11, 12 . . . . . . . . . . . . . . . . . . 6
EM-40, 41, 42 . . . . . . . . . . . . . . . . . . 7
Document 483513
EM and GM Series
Backdraft Dampers
EM & GM Series
1
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Table of Contents
Related Manuals for VENCO EM Series
Summary of Contents for VENCO EM Series
- Page 1 Document 483513 EM and GM Series Backdraft Dampers Installation, Operation and Maintenance Manual Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with these instructions will result in voiding of the product warranty and may result in personal injury and/or property damage.
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Page 2: Pre-Installation Guidelines
Pre-Installation Guidelines The basic intent of a proper installation is to secure the backdraft damper into the opening in such a manner as to prevent distortion and disruption of damper operation. The following items will aid in completing the damper installation in a timely and effective manner. -
Page 3: Installation
Do not install screws on the front side of the frame where they could interfere with the operation of the blades. Note: Used only on EM series dampers. Structural support reinforcement to be provided by others. -
Page 4: Counterbalance Adjustment
Counterbalance Adjustment Procedure The following instructions should be followed when attempting to maximize the counterbalance effect on the EM or GM model dampers. Be aware that when the balance setting is highly sensitive, friction wear, and contamination will have an adverse effect to the operation of the damper. The sensitivity of the counterbalance should only be set to meet the application requirements. - Page 5 Step 2: Slide Weights Outward from Blade Follow this procedure if a reduction of the full open pressure is desired. Note: Sliding the weights outward from the blade will also result in additional reduction in the start open pressure. • Locate the ⁄...
- Page 6 Counterbalance Adjustment for EM-10, 11, and 12: Horizontal Mount-Vertical Airflow Up There are several different adjustments that can be made to achieve the desired start open pressure and full open pressure. Start open pressure refers to the amount of static pressure required to start to open the blades. The full open pressure refers to the amount of static pressure required to fully open the damper blades.
- Page 7 Step 4: Adjustable Pressure Controller If the damper(s) is equipped with an optional Adjustable Pressure Controller (APC) it can be used to increase the start open and full open pressure. See the APC Installation Operation Manual, Document 468292 for more details. Counterbalance Adjustment for EM-40, 41, 42: Horizontal Mount - Vertical Airflow Down There are several different adjustments that can be made to achieve the desired start open pressure and full open pressure.
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Page 8: Our Commitment
Notes Our Commitment As a result of our commitment to continuous improvement, Venco reserves the right to change specifications without notice. Phone: 1.833.881.0565 • Fax: 715.355.2399 • E-mail: info@vencoproducts.com • Website: www.vencoproducts.com 483513 • EM GM Series, Rev. 4, August 2022...
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