Greenheck Smoke Detector DH-98-P - Manual (Page 7)

Figure 3: Label applied to dampers with factory mounted Hochiki duct smoke detectors.
Copyright © 2012 Greenheck Fan Corporation
DH-98-P Hochiki Smoke Detector Rev 2 January 2012
Smoke detector r equir es 300 fpm minimum
air velocity in duct. For damper activation
r equir ements when system velocity is less
than 300 fpm, the local authority having
jurisdiction should be consulted.
Refer to smoke detector installation
instructions and Gr eenheck IOM - Hochiki
SmokeDetector Supplement for dampers with
factory mounted duct smoke detectors.