Greenheck Fan FSD-331 User Manual

Model FSD-331

H*

W*

R

APPLICATION

Model FSD-331 is a high performance combination fire smoke damper
with extremely low leakage. High strength airfoil blades ensure the
lowest resistance to airflow in HVAC systems with velocities to 2000
fpm (10.2 m/s) and pressures to 4 in. wg (1 kPa). Model FSD-331 may
be installed vertically (with blades running horizontal) and is rated for
airflow and leakage in either direction.

Combination Fire Smoke Dampers

RATINGS

UL 555 Fire Resistance Rating
Fire Rating: 3
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity: up to 2000 fpm (10.2 m/s)
Max. Pressure: 4 in. wg (1 kPa)

UL555S Leakage Rating
Leakage Class: I
Operational Rating: Actual ratings are size dependent
Max. Velocity: up to 3000 fpm (15.2m/s)
Max. Pressure: 4 in. wg (1 kPa)
Maximum Temperature: 350°F (177°C)- depending upon the
actuator

hours

STANDARD CONSTRUCTION

Frame: 5 in. x 1 in. (127mm x 25 mm)
galvanized steel hat channel with
reinforced corners. A low profile head
and sill are used on sizes less than
17 in. (432mm)
Blades: Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2 mm) equivalent thickness.
Seals: Extruded silicone rubber blade seals
Flexible stainless steel jamb seals.
Linkage: Concealed in jamb.
Closure Device: RRL 165°F (74°C)
Axles:
Bearings: Bronze sleeve type.

1

⁄2 in. (13mm) dia. plated steel.

Steel Airfoil Blades

UL 555S Leakage Class I

UL555 3 Hour Fire Resistance Rating

Model FSD-331 meets the requirements for fire

dampers, smoke dampers and combination fire

smoke dampers established by:

National Fire Protection Association

NFPA Standards 80, 90A, 92A, 92B, 101 & 105

IBC International Building Codes
ICBO Uniform Building Codes
CSFM California State Fire Marshal

Fire Damper Listing (#3225-0981:103)
Leakage (Smoke) Damper Listing (#3230-0981:104)

New York City (MEA listing #260-91-M)

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

Standard 555 & 555S (Listing #R13317)

Greenheck Fan Corporation certifies that the
model FSD-331 shown herein is licensed to
bear the AMCA Seal. The ratings shown are
based on tests and procedures performed
in accordance with AMCA Publication 511
and comply with the requirements of the
AMCA Certified Ratings Programs. The
AMCA Certified Ratings Seal applies to air
performance ratings only.

SIZE LIMITATIONS:

Minimum Size:
(203 mm W x 152mm H)
Maximum Size (Vertical Only):
Single Section: 32 in. W x 36 in.H
(813mm W x 914mm H) or
30 in. W x 48 in. H
(762mm x 1219mm)
Multiple Section: 120 in. W x 96 in. H
(3048mm W x 2438mm H)

OPTIONAL FEATURES:

• RRL/OCI (Open closed indication switches)

• 165ºF (74°C), 212ºF (100°C), 250ºF (121°C), 350ºF (177°C) RRL's

available

• TOR (remote override closure allows damper to perform smoke

management functions during a fire emergency.)

• Electric or pneumatic actuators to accomplish smoke management

and system functions.

• POC retaining angles

• Smoke detectors

• Momentary Switch

• Transitions (R, C, O)

• PRV (pneumatic relief valve)

• Security Bars

• Sealed transitions and sleeves

8 in. W x 6 in. H

LH

RH

*W&H dimensions furnished approximately 1/4 in. ( 6 mm) undersize.
(Add sleeve thickness for overall sleeved damper dimension)

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

Installation instructions available at www.greenheck.com

Pressure Drop Data FSD-331

5D 6D

5D 6D

5D

D

4 (W) (H)

3.14

5D 6D

5D

D

4 (W) (H

)

3.14

This pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three configurations shown. All
data has been corrected to represent standard air at a density of .075 lb/ft

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
system.

3

(1.201 kg/m3).

AMCA Test Figures

Figure 5.3 Illustrates a fully ducted damper. This configuration has the lowest pressure drop of the three test configurations
because entrance and exit losses are minimized by straight duct runs upstream and downstream of the damper.

Figure 5.2 Illustrates a ducted damper exhausting air into an open area. This configuration has a lower pressure drop than
Figure 5.5 because entrance losses are minimized by a straight duct run upstream of the damper.

Figure 5.5 Illustrates a plenum mounted damper. This configuration has the highest pressure drop because of extremely high
entrance and exit losses due to the sudden changes of area in the system.

Figure 5.3

Figure 5.2

Figure 5.5

12x12

48x12

24x24

36x36

12x48

AMCA 5.2 Pressure Drop FSD-331

5D 6D

5D

D

4 (W) (H)

3.14

Ve locity

(fpm)

Pressure Drop

(in. wg)

Ve locity

(fpm)

Pressure Drop

(in. wg)

Velocity

(fpm)

Pressure Drop

(in. wg)

Ve locity

(fpm)

Pressure Drop

(in. wg)

Ve locity

(fpm)

Pressure Drop

(in. wg)

500 0.03 500 0.01 500 0.01 500 0.01 500 0.02
1000 0.12 1000 0.06 1000 0.061000 0.051000 0.08
1500 0.26 1500 0.12 1500 0.121500 0.12 1500 0.18
2000 0.46 2000 0.22 2000 0.222000 0.21 2000 0.33
2500 0.72 2500 0.34 2500 0.342500 0.332500 0.51
3000 1.04 3000 0.49 3000 0.493000 0.483000 0.74
3500 1.41 3500 0.67 3500 0.673500 0.653500 1.00
4000 1.84 4000 0.87 4000 0.884000 0.854000 1.31

12in. X 48 in.

(

305mm x 1219mm) 48 in. x 12 in. (1219mm x 305mm) 24 in. x 24 in. (610mm x 610mm) 36in. x 36 in. (914mm x 914mm) 12 in. x 12 in. (305mm x 305mm)

R

*

* Sizes are in inches.

Greenheck Fan Corporation certifies that the
model FSD-331 shown herein is licensed to
bear the AMCA Seal. The ratings shown are
based on tests and procedures performed
in accordance with AMCA Publication 511
and comply with the requirements of the
AMCA Certified Ratings Programs. The
AMCA Certified Ratings Seal applies to air
performance ratings only.