Greenheck Fan Smoke Dampers SMD-401 user manual

Summary of the content on the page No. 1

Model SMD-401
Smoke Dampers
APPLICATION
Model SMD-401 is a class I leakage rated smoke damper. High strength,
Extruded Airfoil Blades
streamlined extruded airfoil blades insure lowest resistance to airflow in
UL 555S Leakage Class I
HVAC systems with velocities to 3000 fpm (15.2 m/s) and 6 in. wg (1.5
kPa). Model SMD-401 may be installed vertically (with blades running
horizontal) or horizontally and is rated for airflow and leakage in either Model SMD-401 meets the requirements for smoke

Summary of the content on the page No. 2

Pressure Drop Data SMD-401 This pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three configurations shown. All 3 3 data has been corrected to represent standard air at a density of .075 lb/ft (1.201 kg/m ). Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an analysis of other system influences should be used to estimate actual pressure losses for a damper installed in a given HVAC s

Summary of the content on the page No. 3

Application Data 1 1 /2" max. Damper Sideplate and Sleeve Dimensional Data The drawings below illustrate the factory standard sideplate and sleeve mountings for the SMD-401. The standard "A" dimen- sions listed in the table provide adequate space for the mounting of actuators and controls. 3 If space constraints are a problem the "A" dimension can be varied between 5 ⁄8 in. (136mm) and 12 in. (305mm). 1 1 /2 in. max. Sleeve Sideplate 3 3 /4" 1 1 /2" max. "A" Dimension in. (mm) Sleeve Sideplate S

Summary of the content on the page No. 4

Damper Sizing Information Dampers larger than maximum single section size are supplied as a factory assembly of two or more sections of equal size. The following figure shows the size damper section that has been qualified for operation with a single actuator. Larger sizes can be accommodated using multiples of these assembles. Transitioned Damper When a fire/smoke damper is being used in conjunction with round or oval ductwork, the SMD-401 can be supplied in a factory sleeve with rou