Greenheck FD150X Installation, Operation And Maintenance Manual page 4

4. CONNECTING DUCTS TO THE FIRE DAMPER
All duct connections to FD & DFD 150X series
extended frame dampers must be "breakaway"
type connections. All connections shown on page
6 are considered breakaway. Factory furnished
duct collars on types R & CR fire dampers are also
considered breakaway (see Figure 1).
5. MULTIPLE SECTION FIRE DAMPERS
When multiple sections are shipped unassembled,
installer shall fasten dampers together as
described in Section 3. Table 1 shows maximum
sizes for multiple section damper.
Maximum Sizes
Damper
for Single-Section
Model
Dampers
FD-150X (H or V) 48 x 48
DFD-150X (V) 36 x 36
DFD-150X (H) 30 x 30
Note: V=Vertical Mount & H= Horizontal Mount
Table 1: Maximum sizes for single and multi-section
dampers.
Recommended Preparation of
Openings in Wood and Metal Stud
Walls
• Frame wall openings as shown in Figure 3.
• Double vertical studs are not required for openings 36
in. x 36 in. or smaller.
• Gypsum wall board must be fastened 12 in. on center to
all stud and runner flanges surrounding opening (see
Figure 4).
• All construction and fasteners must meet the
requirements of the appropriate wall design. (See UL Fire
Resistance Directory)
4
Max Overall Size
for Multi-Section
Dampers
96 x 48
or
120 x 40
72 x 48
or
60 x 60
48 x 36
igure 4: Detail of retaining angles and gypsum board
F
application for metal and wooden stud construction.
24 in. o.c.
Maximum
(metal studs)
12 in.
24 in. o.c.
Maximum
16 in. o.c.
Maximum
(wood studs)
Floor Runner
Figure 3: Preparation detail for opening in stud wall.
Metal Stud Construction
Gypsum Wallboard
Retaining
Angle
In metal stud construction,
Damper
exposed steel surfaces need
Sleeve
not be covered with gypsum
wallboard.
Wooden Stud Construction
Gypsum Wallboard
Retaining
Angle
In wood stud construction,
Damper
Sleeve
gypsum wallboard must cover
all wood stud surfaces.
24 in. o.c.
Ceiling Runner
Maximum
(metal studs)
2 in.
2 Panhead
Screws
2 in.
16 in. o.c.
Maximum
(wood studs)
Stud or Runner
1 in. Min.
Stud or Runner
1 in. Min.