Greenheck FD Series Installation, Operation And Maintenance Instructions page 3

5. CONNECTING DUCTS TO FIRE DAMPER SLEEVE
Any duct connection other than breakaway is considered rigid.
The connections shown on this page are considered breakaway.
Factory furnished duct collars on type R and CR fire dampers are
also considered breakaway (See Figure 3).
6. MULTIPLE SECTION FIRE DAMPERS
When multiple sections are shipped unassembled, installer shall
fasten dampers together as described in Section 3. Table 2
shows maximum sizes for multiple section dampers. Dampers
over 48 in. tall must be factory assembled.
Damper
Model
FD-110 (H or V), FD-300/350(V), FD-310 (H or V)
KFD-110 (H or V)
FD-150 (H or V), SSFD-150/ 155 (V)
KFD-150
SSFD-150/155(H)
FD-350(H)
KFD-350(H)
KFD-310/350(V), SSKFD-350/355
FD-150/155 (V)
FD-100 (V), SSFD-350 (V)
DFD-150 ( V)
DFD-155 ( V)
DFD-110 (V) DFD-350/355 (V)
DFD-110/155 (H) DFD-350/355 (H) SSDFD-X5X(V)
DFD-150 (H)
Note: V=Vertical Mount and H=Horizontal Mount.
All dimensions shown are in inches.
Table 2: Maximum section sizes and overall sizes for
multiple section dampers.
Traditional Breakaway Style Transverse Joints
Transverse joints illustrated in Figure 7 have always been
approved as breakaway connections. SMACNA testing has
also approved the following variations as breakaway
connections.
• Standing "S" joints can be applied with #10
sheet metal screws (through joint and duct) subject
to the following limitations: Maximum 2 screws in
each side and in bottom joint.
• Transverse joints illustrated can be
applied as top and bottom joints with
Drive Slip - side joints in duct heights
up to 20 inches.
Round and Oval Duct Breakaway Connections
Round ducts connected to factory supplied Type R or CR
damper collars may use #10 sheet metal screws as follows:
• Ducts 22 in. wide (or dia.) and smaller may use 3 screws.
• Ducts larger than 22 in. wide (or dia.) may use 5 screws.
Manufactured Flanged System
Breakaway Connections
Flanged connection systems manufactured by
Ductmate, Ward, and Nexus are approved as breakaway
connections when installed as illustrated in Figure 8.
Maximum Max Overall Size
Damper Single for Multi-Section
Section Sizes Dampers
48 x 48 -
36 x 16 96 x 48
48 x 48 96 x 48 or
36 x 16 120 x 40
36 x 36 -
40 x 40 80 x 40
36 x 16 80 x 40
36 x 16 -
48 x 48 74 x 74
48 x 48 -
36 x 36 48 x 36
36 x 36 -
36 x 36
30 x 30 N/A
30 x 30 48 x 36
BREAKAWAY CONNECTIONS
Drive Slip Joint
Figure 8: Detail of manufactured flanged system
3
Attachments
Blade
Channel
2 in. Max
6 in. Max
Figure 5: Field attachment of fire dampers to sleeves.
Retaining
Angle
*only applicable for damper sizes above 36 in. x 36 in.
Figure 6: Retaining angle installation.
Plain "S" Slip Hemmed "S" Slip
Inside Slip Joint
Standing "S" (Alt.)
Figure 7: Traditional breakaway style transverse joints.
NOTE: All breakaway connections described may have duct sealant
applied, PA2084T duct sealant adhesive manufactured by Precision,
in accordance with SMACNA recommendations.
6 in. long 1 / in. max.
16
thickness plastic cleats;
12 in. c-c (min. 1 per side)
Flanged system angles
(Attach per
manufacturer's
instructions)
Duct
breakaway connections.
NOTE: Attachments must not
enter blade channel or they may cause interference with
blade closure. Narrow Line and Ultra Thin dampers do not
have flange for attachments and must be welded to
sleeve.
Attachments can be
staggered or
evenly spaced
Wall or
Floor
Retaining
Angle
Sleeve
Duct
Damper
Double "S" Slip
Standing "S" Standing "S" (Alt.)
Standing "S" Standing "S"
(Bar Reinforced) (Angle Reinforced)
Fire Damper Sleeve
Corners may be bolted
with 3/8 in. nuts and bolts
Neoprene gasket
between all angles