Greenheck FD-300 Manual Download Page 1

Model FD-300

Static Rated

 

FIRE DAMPERS

 

 

Ultra Thin Construction

3 Hour Fire Resistance Rating

Model FD-300 meets the requirements for fire dampers 

established by:

National Fire Protection Association 

(NFPA Standards 80, 90A & 101)

Underwriters Laboratories Standard 555 

(Listing #R-13317)

IBC International Building Codes
New York City 

(MEA listing #260-91-M)

California State Fire Marshall

 

(Listing #3225-981:102 for use in walls)

APPLICATION

Model FD-300 is approved for use in walls and partitions 
with fire resistance ratings of 3 hours or more. This model 
carries a 3 hour UL fire damper label. UL 555 classifies 
static rated fire dampers for use in HVAC systems that are 
automatically shut down in the event of fire .

RATINGS

UL555 Fire Resistance Rating
             Fire Rating: 3 hours

CONSTRUCTION

Galvanized steel (in gauges required by UL listing R-13317)

INSTALLATION

All fire damper installations require the use of sleeves, 
angles and methods described in Greenheck Fire Damper 
Installation Instructions #452763, included with every 
damper shipment. Sleeves can be field fabricated or factory 
furnished as a complete damper/sleeve assembly. See 
Factory Sleeve Option below for details. 

STANDARD FEATURES

•  Fusible links -  165°F (74°C) standard, 212°F (100°C) and 
    286°F (141°C) available
•  Vertical  mount

OPTIONAL FEATURES

•  Security bars
•  One piece retaining angles (POC)
•  Transitions (B & B2)  

FACTORY SLEEVE OPTION

FD-300 Fire Dampers are available in factory furnished sleeves. Sleeves are galvanized 
steel and are available in 10 thru 20 ga. (1mm - 3.5mm) thicknesses and lengths up to 
36 in. (914mm). 

“K” dimension specifies location of damper within the sleeve. Minimum is 4 in. 
(102mm), maximum is “L” less 4 in.  (102mm), which allows for mounting angle 
installation and duct connection at each end of sleeve. If “K” dimension is not 
specified, it will be provided as one half of “L” dimension (damper centered in sleeve).

Note: If using access doors, the doors should be installed on the "K" side of the 
damper.

H*

K

Damper

Location

L

Overall Sleeve Length

W*

C

L Damper Frame

Sleeve

Damper

These dimensions are furnished approximately 1/4 in. (6mm) undersize

TYPE A

W*

H*

O*

H*

W*

TYPE  B

VERTICAL MOUNT

ONLY

VERTICAL MOUNT

ONLY

1 1/2 in. 

1 1/2 in. 

“UL CLASSIFIED (see complete marking on product)”

“UL CLASSIFIED to Canadian safety standards (see 

complete marking on product)”

 

Standard 555 (Listing #R13317)

When sealed option is selected, B transitions 
will need to be field sealed in the area where 
duct to sleeve connection is made.

Type B corner profile

Type B with sleeve

Installation instructions available at www. greenheck.com

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