Assessments - 3, GPA: 4.7
(
)
)
|
Facilidade de uso
Sometimes smoke can be of such quantity as to be a serious hazard to life safety unless blowers are shut down and dampers are actuated. The primary purpose of duct smoke detection is to prevent injury, panic, and property damage by reducing the spread (recirculation) of smoke. The detector samples air currents passing through a duct and gives dependable performance for management of smoke and combination fire smoke dampers. Duct smoke detection can also serve to protect the air conditioning system itself from fire and smoke damage. There are several important documents that provide guidance concerning the performance, application and installation of duct detectors: 1) NFPA Standard 90A, Installation of Air Conditioning and Ventilating Systems 2) NFPA Standard 92A, Recommended Practice for Smoke Control Systems 3) NFPA Standard 72, National Fire Alarm Code 4) NFPA Standard 101, Life Safety Code 5) UL Standard 268A, Standard for Smoke Detectors for Duct Applications 6) ASHRAE Handbook and Product Directory, “Fire and Smoke Control” 7) System Sensor, Guide for Proper Use of Smoke Detectors in Duct Applications. Duct detectors are: NOT a substitute for an open area smoke detector. NOT a substitute for early warning detection, and NOT a replacement for a building’s regular fire detection system. Specifications Type: Photoelectric Air duct velocity: 100 to 4000 fpm (.5 m/s to 20.3 m/s) Operating temperature range: 32°F to 131°F (0°C to 55°C) Operating humidity range: 10% to 93% R.H. Operation Voltage: 24 VAC/DC or 120/240 VAC Features • Textured cover for convenient visual inspection. • The detector provides a trouble signal in the event that the front cover is removed. • Integral filter system included to reduce dust and residue effects on detector and housing, thereby reducing maintenance and servicing. • Terminal connections are of the strip and clamp method suitable for 12-18 AWG wiring. • Outside mounting tabs for easy connection to sleeve or ductwork (when detector ships loose). Configuration Maximum wall thickness: 6 in. (152mm) on FSD & SSFSD applications (Consult factory for walls greater than 6 in. [152mm]) Actuator Location: Must be right hand drive Must be externally mounted Detector Location: Mounts opposite actuator side Must be external Sampling tubes longer than three feet must be supported on each end. Holes in duct smoke detector sampling tubes must face into the airflow. Availability For use with all FSD, SSFSD, SMD, SSSMD, and CFSD models. Not available on SMDR models. Listings UL 268A Refer to Greenheck Installation Supplement: Part #463813 IOM-Smoke Detector Supplement SLEEVE LENGTH ORDERING OPTIONS Sleeve Length Height less than 25 in. (635mm): 24 in. (610mm) sleeve (15 in. [381mm]‘A’ dimension) (detector mounted parallel to sleeve) Height greater than or equal to 25 in. (635mm): 21 in. (533mm) sleeve (11 in. [279mm] ‘A’ dimension) (detector mounted perpendicular to sleeve) Figure 1: Label applied to dampers with factory mounted duct smoke detectors. Smoke detector requireslOO fpm minimum air velocity in duct. For damper activation requirements when system velocity is less than 500 fpm, the local authority having jurisdiction should be consulted. Refer to smoke detector installation instructions and Greenheck IOM - Smoke Detector Supplement FS for dampers with factory mounted duct smoke detectors. 458565 - Duct Breakaway Connection (by others) 11/2 in. x in. 16 ga. minimum retaining angle Smoke detector mounted externally on left-hand side of damper 11/2 in. x 11/2 in. 16 ga. minimum retaining angle Accessory (OCI/RRL/TOR) mounted externally on right-hand side of damper Note: All actuatorswill be externally mounted on the right-hand side of damper ■ 15in. ‘A’ dimension 24 in. sleeve length 3 in. minimum to allow for retaining angle and duct breakaway connection 11/2 ¡n. X 1K2 ¡n. 16 ga. minimum retaining angle Accessory (OCI/RRL/TOR) mounted externally on right hand side of damper 11/2in.x1/2in. 16 ga. minimum retaining angle Height equal to or greater than 25 inches 1-Smoke detector mounted externally on left-hand sideof damper Note: All actuators will be externally mounted on the right-hand side of damper - Duct Breakaway Connection (by others) 11 in. ‘A’ dimension 21 in. sleeve length 3 in. minimum to allowfor retaining angle and duct breakaway connection Figure 2: Smoke detector mounting orientation for dampers less than 25 inches (635mm) in height. Ordering Options Factory Mounted Smoke detector will be wired to a 4 in. x 4 in. (102mm x 102mm) handi-box. The closure device (if RRL or TOR) will also be wired to the handi-box. Dampers provided with the smoke detector option will include single point wiring as standard (includes RRL, OCI, TOR, detectors, and multiple actuators). Shipped Loose Shipped loose smoke detector will only include the detector itself (no mounting hardware or bracket seals). The duct size...