Greenheck SMD Series User manual

®
Flange Mounted SMD 1
®
Document 472664
Flange Mounted Installation for
SMD-xxx, SESMD-xxx, and SSSMD-xxx Series
Smoke Dampers
Refer to:
‘Installation Instructions for SMD, SESMD, SSSMD
series models’ (Part #461338) for additional details.
See complete marking on
product.
UL 555S Classification
R13317
1. Smoke Damper Requirements and Application
Smoke dampers are required to close and prevent
the passage of air and smoke through the ducts or
ventilation openings in smoke barriers. Smoke dampers
are also applied in engineered smoke control systems to
establish air pressure differentials and thereby prevent
the spread of smoke. These dampers are designed to
operate with blades running horizontally. Dampers can
be vertically or horizontally installed at, in accordance
with NFPA 90A or adjacent to the point where the duct
passes through the smoke barrier.
2. Location of Damper in Ductwork
Place the damper assembly in its proper position
relative to the barrier. The plane of the closed damper
blades must be within 24 in. (610mm) of the rated
smoke barrier and before any duct inlets or outlets.
3. Attaching Damper to the Duct
The damper is flange mounted to the duct, sleeve, or
wall opening using:
#10 sheet metal screws,
1⁄4in. (6mm) diameter nuts and bolts,
tack or spot welds. or
3⁄16 in. (5mm) diameter steel pop rivets.
Attachments must be made at each flange spaced a
maximum of 6 in. (152mm) on centers and a maximum
of 2 in. (51mm) from corners.
4. Sealing the Installation
The following duct sealants may be used to seal
between the damper’s flange and the mating surface in
accordance with SMACNA recommendations:
Precision PA2084T duct sealant adhesive,
Design Polymetrics DP1010 water base duct
sealant,
Grey Pookie, or
Ductmate PROseal®
5. Actuator Connections
Electrical and/or pneumatic connections to damper
actuators should be made in accordance with wiring
and piping diagrams developed in compliance with
applicable codes, ordinances and regulations.
Damper Model
Maximum Single
Section Size
in. (mm)
Maximum Overall
Size for Multiple
Section Dampers
in. (mm)
SMD-301, 302
SMD-301M, 302M
32 x 50
(813 x 1270)
128 x 100 or
256 x 50
(3251 x 2540) or
(6502 x 1270)
SMD-401 48 x 60
(1219 x 7315)
192 x 72, 48 x 288,
or 384 x 36
(4877 x 1829,
1219 x 7315, or
9754 x 914)
SMD-401M 48 x 36
(1219 x 914)
144 x 36
(3658 x 914)

472664 • Flange Mounted SMD, Rev. 4, October 2019 Copyright 2019 © Greenheck Fan Corporation2
®
Phone: [phone] • Fax: [phone] • Parts: 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the
literature section of the website at Greenheck.com/Resources/Library/Literature.
Our Commitment
1
4
2
3
5
Item Description
1 Damper frame
2 Duct outlet
3 Fan (not limited to centrifugal)
4 #10 sheet metal screws
5 Actuator
The actuators are to be installed to
function per system requirements and to
be controlled by smoke detection devices.
Fan Isolation Application
For air handling equipment isolation, leakage rated dampers are designed to operate with blades running
horizontally. Dampers can be installed in a vertical or horizontal position. Sealants and damper seal materials meet
the requirements for NFPA 90A for smoke developed rating (<50) and flame spread index (<25) as tested per UL
723/ASTME84-91 A/NFPA 255. Dampers can be attached to the fan system discharge or inlet without being 24 in.
(610mm) of a smoke barrier when used as an air handling equipment isolation damper.