3 x Duct Dia.
Duct
Dia.
Duct
Dia.
Duct
Dia.
Duct
Dia.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Model CR
Use and Operation:
The CR damper is a device that responds automatically to duct pressure changes to regulate airflow in supply or exhaust applications.
The damper adjusts the amount of free area thereby controlling constant velocity and airflow.
Installation:
1. CR Dampers may be installed either in horizontal or vertical round duct. If installed horizontally, the BAS marking must face downward.
2. Device to be installed in register boxes, rigid ducts, or duct collars through a friction fit caused by the rubber gasket. The gasket
also creates an air seal. DO NOT USE FASTENERS TO INSTALL THIS PRODUCT.
3. If installed in an intake position, the damper must be set back at least three times the duct diameter from intake grilles. The damper
must also be set back at least three times the duct diameter from duct connections, duct bends, or other places with turbulent air.
4. If installed in an exhaust position, the damper must be set back at least the distance of the duct diameter from exhaust grilles. The
damper must also be set back the distance of the duct diameter from duct connections, duct bends, or other places with turbulent air.
5. Install with future access for removal or inspection.
6. Avoid using fasteners in the duct where the damper is placed to prevent
ineffective operation and damage.
7. Avoid contact between the damper and gypsum board duct.
8. Install in accordance with necessary mechanical and building codes.
9. Install dampers following the correct airflow direction of the duct.
Flex
Duct
Duct Collar / Grille
CR
Damper
Register Box
/ Rigid Duct
CR Damper
Flex
Duct
(Constant Airflow Regulator)
BAS
Marking Down
Airflow
Airflow
3 x
Duct
Dia.
Duct
Dia.
Duct
Dia.
Flex
Duct
Duct Collar / Grille
CR
Damper
Register Box
/ Rigid Duct
CR Damper
Flex
Duct
BAS
Marking Down
Airflow
Airflow
