Greenheck Fan SMD-401 Manuale Utente

Model SMD-401 meets the requirements for smoke 

dampers established by:

National Fire Protection Association

    NFPA Standards 92A, 92B, 101 & 105
IBC  International Building Codes
New York City (MEA listing #260-91-M)
California State Fire Marshall
     Listing#: 3230-0981:108 (smoke)

“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-401 is a class I leakage rated smoke damper. High strength, 

streamlined extruded airfoil blades insure lowest resistance to airflow in 

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 

direction.

RATINgS

 

Leakage: 

UL 555S leakage class I. Leakage 

 

 

rated in both directions 

 

Velocity:  

Operational rated to 3000 fpm 

 

 

(15.2 m/s) for sizes up to  

 

 

48 in. W x 108 in. H or 144 in. H x 36 in. H  

 

 

(1219mm x 2743mm) or  

 

 

(3658mm x 914mm) or 

 

 

2000 fpm (10.2 m/s) for sizes 

 

 

greater than that. Rating is for 

 

 

airflow in either direction through 

 

 

damper. 

 

Temperature: 

250°F (121°C) with all actuators. 

 Maximum Pressure: 

6 in. (1.5 kPa)

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 x 203mm) 

 

Maximum Size: 

 

Single Section: 

48 in. W x 60 in. 

 

 

(1219mm W x 1524mm H) 

 

Multiple Section: 

192 in. W x 72 in. H 

 

 

(4877mm W x 1829mm H) or  

 

 

48 in. W x 288 in. H 

 

 

(1219mm W x 7315mm H) or 

 

 

384 in. W x 36 in. H 

 

 

(9754mm 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 
• Transformer

Model SMD-401

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.greeenheck.com