Greenheck Fan SMD-401M Manual Do Utilizador

Model SMD-401M meets the requirements for smoke 

dampers established by: 

National Fire Protection Association 

    NFPA Standards 92A, 92B, 101 & 105
IBC International Building Codes
ICBO Uniform Building Codes
New York City (MEA listing #260-91-M)
CSFM California State Fire Marshal
    Leakage (Smoke) Damper Listing  (#3230-0981:108)

“UL CLASSIFIED (see complete marking on 

product)”

“UL CLASSIFIED to Canadian safety standards 

(see complete marking on product)”

 

Standard 555S (Listing #R13317)

APPLICATION

Model SMD-401M is a class I leakage rated modulating smoke 

damper. The model SMD-401M serves the function of 

both a control damper and smoke damper. High strength airfoil 

blades ensure the lowest resistance to airflow in HVAC systems 

with velocities to 2000 fpm (10.2 m/s ) and 4 wg (1 kPa). Model 

SMD-401M may be installed vertically (with blades running 

horizontal) or horizontally and is rated for airflow and leakage in 

either direction.

RATINgS

 

Leakage Class: 

I 

Operational Rating: Actual ratings are size dependent. 
 

Max. Velocity: 

up to 2000 fpm (10.2 m/s) 

 

Max. Pressure: 

4 in. wg (1 kPa) 

 

Temperature: 

250°F (121ºC) with all actuators.

STANDARD CONSTRUCTION

 

Frame:  

5 in. x 1 in. (127mm x 25mm) 

 

 

galvanized steel hat channel with 

 

 

reinforced corners. A low profile 

 

 

head and sill are used on sizes 

 

 

less than 17 in. (432mm) high to 

 

 

maximize free area and 

 

 

performance. 

 

Blades:  

Airfoil shape constructed of 

 

 

heavy gauge extruded aluminum. 

 

 

Structural reinforcement through 

 

 

the entire length. 

 

Seals: 

Extruded silicone rubber blade 

 

 

seals. Flexible stainless steel 

 

 

jamb seals. 

 

Linkage: 

Concealed in jamb. 

 

Axles: 

1

⁄

2

 in. (13mm) dia. plated steel. 

 

Bearings: 

Bronze sleeve type.

SIzE LIMITATIONS:

 

Minimum Size: 

8 in. W x 8 in. H 

 

 

(203mm W x 203mm H) 

 

Maximum Size: 

 

Single Section: 

36 in. W x 36 in. H 

 

 

(914mm W x 914mm H)

 

Multi Section: 

144 in. W x 36 in. H 

 

 

(3658mm W x 914mm H)

Optional Features:

• Galvanized steel sleeves.
• Stainless steel bearings
• OCI (Open closed indication switches)
•  Electric or pneumatic actuators to accomplish smoke 

management and system functions.

• POC Retaining angles 
• Smoke detector
• Momentary switch
• Transitions (R, C, O)
• Sealed transitions and sleeves

SMD-401M

Smoke Dampers

*W&H dimensions furnished approximately 

1

/

4

 in. (6mm) undersize.

(Add sleeve thickness for overall sleeved damper dimension)

Right hand drive is shown. Left hand drive is available upon request.

H*

W*

LH

RH

Installation instructions available at www.greenheck.com