All Metric dimensions ( ) are soft conversion.
© Copyright E.H. Price Limited 2006.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
FD-RD and FDD-RD Fire Dampers
1. 20 gauge galvanized steel integral sleeve
shall be of the
SAME GAUGE
or heavier
as the duct to which it is attached. Gauges
shall conform to SMACNA or ASHRAE duct
standards. The length of the sleeve extend-
ing beyond the wall opening shall not exceed
16” (406 mm) on the operator side or 6” (152
mm) on the opposite side.
2. The connecting duct shall terminate at
the integral sleeve and is connected by
using either:
(a) a minimum of 3 - #10 sheet metal screws
spaced equidistant around the sleeve for
22” (559mm)and smaller duct.
(b) a minimum of 5 - #10 sheet metal screws
spaced equidistant around the sleeve for
greater than 22” (559mm) duct.
(c) a 4” (102mm) drawband.
3. Clearance between the damper sleeve and
the round or square wall opening shall be a
minimum of
1
/
2
” (13 mm) and a maximum
of 1” (25 mm).
4. Damper will be factory supplied with one
retaining plate secured to the damper sleeve
on the operator side of the damper.
5. A minimum of 4 equally spaced 20 gauge
galvanized steel clip angles shall be attached
to both the integral sleeve and the retaining
plate. The clip angles shall be attached with
1
/
8
” (3mm) rivets, #10 x
1
/
2
” (13mm) sheet-
metal screws, bolts or welds. In metal stud/
gypsum applications, the retaining plate
may be in front of or behind the gypsum,
directly against the metal studs.
6A.
Option 1:
The damper may be installed
in a wood/gypsum, steel stud/gypsum, or
masonry fire partitition in the vertical or
horizontal position (blade shaft running hori-
zontal) with a retaining plate flush against
each side of the fire partition.
Installation:
with the factory installed retaining plate flush
to the fire partition, place another retaining
plate on the opposite side of the damper
sleeve and slide it forward until it becomes
flush with the opposite side of the partition.
Place the Splice Clip over the cut portion
of the retaining plate. Secure it with 4 - #10
sheet metal screws or rivets. Secure the clip
angles to the retaining plate and damper
sleeve as illustrated.
Fire Dampers (Static & Dynamic)
Installation Instructions
Jul / 06 245002 SHEET 1 OF 2
