Greenheck FD-350A User Manual

Model FD-350

Stainless Steel
Closure Spring

Fusible Link (replaceable)
165° F (74°C)Standar d (212°F [100°C] available)

HORIZONTAL MOUNT

Application

Static Rated Fire Dampers

Model FD-350 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. UL555 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 or Horizontal mount available

Optional Features

• Security Bars

• One piece retaining angles (POC)

• Transitions (B, B2, C, CO, CR, R)

3 Hour Fire Resistance Rating

Model FD-350 meets the requirements for fire damper
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)

“UL CLASSIFIED (see complete marking on product)”
“UL CLASSIFIED to Canadian safety standards (see
complete marking on product)”

Standard 555 (Listing #R13317)

W*

H*

Stainless Steel
Closure Spring

Fusible Link (replaceable)
165° F (74°C)Standar d (212°F [100°C] available)

“K” side

11

3

(94mm)

/16 in.

VERTICAL

Factory Sleeve Option

FD-350 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 door should be installed on the “K” side of the
damper.

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 with sleeve

Type B corner prole

H*

HORIZONTAL MOUNT

Sleeve

Damper

K

Damper

Location

CL Damper Frame

Overall Sleeve Length

L

W*

Installation instructions available
at www.greeenheck.com.

Sizing Data FD-350 Type A,B, & B2

HORZONTAL MOUNT

VERTICAL MOUNT

varies

varies

K dim.

varies

varies

sleeve length

sleeve length

1 1/2 in.

1 1/2 in.

1 1/2 in.

1 1/2 in.

K dim.

Dampers larger than maximum single section size are supplied
in 2 or more sections of equal size. If ordered with a factory
sleeve, multi-section dampers are factory assembled ready for
installation. If ordered without a factory sleeve, multi-section
dampers require field assembly. (See Greenheck Fire Damper
Installation Instructions #452763).

The following chart show minimum and maximum damper
sizes. Dimensions are in inches (mm in parentheses).

Size Limitations

inches (mm)

Single
Section
Vertical

Single
Section

Horizontal

Multi

Section

Horizontal**

Type A Type B & B2

minimum maximum minimum maximum

4 x 4

(102 x 102)

4 x 4

(102 x 102)

NA

48 x 48

(1219 x 1219)

40 x 40

(1016 x 1016)

80 X 40

(2032 X 1016)

4 x 3

(102 x 76)

4 x 3

(102 x 76)

NA

48 x 43

(1219 x 1092)

40 x 35

(1016 x 889)

80 X 35

(2032 X 889)

W*

H*

H*

H*

Type A Type B

3 in.

O*

W*

VERTICAL MOUNT

10 in.

3 in.

O*

** Consult factory for number of sections.

Maximum Single Section Dimensions

ype A Type B

T

48" max. (vert.)
40" max. (horz.)

48" max. (vert.)
40" max. (horz.)

Multi-Section Limitations (horizontal only)

Type A

80" max.

Type B

80" max.

40" max.

35" max.

48" max. (vert.)
40" max. (horz.)

43" max. (vert.)
35" max. (horz.)

W*

H* O*

3 (76) 5 (127)

4 (102) 6 (152)

5 (127) 7 (178)

6 (152) 8 (203)

7 (178) 9 (229)

8 (203) 10 (254)

9 (229) 11 (279)

10 (254) 12 (305)

11 (279) 13 (330)

12 (305) 14 (356)

13 (330) 15 (381)

14 (356) 16 (406)

15 (381) 18 (457)

16 (406) 19 (483)

17 (432) 20 (508)

18 (457) 21 (533)

19 (483) 22 (559)

20 (508) 23 (584)

21 (533) 24 (610)

22 (559) 26 (660)

23 (584) 27 (686)

24 (610) 28 (711)

25 (635) 29 (737)

Type B2

16 in.

H* O*

26 (660) 30 (762)

27 (686) 31 (787)

28 (711) 32 (813)

29 (737) 33 (838)

30 (762) 34 (864)

31 (787) 35 (889)

32 (813) 36 (914)

33 (838) 38 (965)

34 (864) 39 (991)

35 (889) 40 (1016)

36 (914) 41 (1041)

37 (940) 42 (1067)

38 (965) 43 (1092)

39 (991) 44 (1118)

40 (1016) 45 (1143)

41 (1041) 46 (1168)

42 (1067) 47 (1194)

43 (1092) 48 (1219)

44 (1118) -

45 (1143) -

46 (1168) -

47 (1194) -

48 (1219) -

* All multiple section dampers, with B transitions, will include

a factory installed sleeve.

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