CRD-1 (Rectangular, Butterfly Style)

CRD-1 (Rectangular, Butterfly Style)
CRD-1
Ceiling Radiation Damper
Rectangular
Application and Design
The CRD-1 has been UL tested and labeled for protection of
ceiling openings in fire rated floor/ceiling assemblies with fire
resistance ratings of 3 hours or less. This product can also be
applied to steel lay-in style ceiling diffusers up to 24 in. x 24
in. (610mm x 610mm) maximum size when installed with an
approved thermal blanket.
Construction
Standard
Optional
Frame
Galvanized
Steel*
-
Standard
Top, Bottom,
or Top/Bottom
Extension
Galvanized
Steel*
-
165°F
(74°C)
212°F
(100°C)
Under 115.46
sq. in.
(74,490 sq. mm)
Not required
-
Over 115.46
sq. in.
(74,490 sq. mm)
Non-asbestos
UL classified
-
Frame Type
Blades
Fusible Link
Temperature
Blade
Insulation
“UL CLASSIFIED (see complete marking on product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555C (Listing #R13446)
National Fire Protection Association:
NFPA Standards 90A and 101
CSFM California State Fire Marshal
Fire Damper Listing (#3225-0981:0101)
New York City MEA Listing #260-91-M
W&H
Minimum
Size
Maximum Size
Inches
4x6
24 x 24
mm
101 x 152
610 x 610
*W & H dimensions furnished approximately 1/4 in. (6mm) under size.
Frame Option Dimensions
Damper Model
Height (in.)
A
B
C
D
CRD-1 Standard Frame
6 - 24
2 13⁄16
-
-
-
CRD-1B Bottom Extension
6 - 24
-
4 3/4
-
-
Blade
Extension
C
A
W*
H*
* in gauges required by UL listing R13446
B
D
CRD-1T Top Extension
CRD-1BT Bottom and Top
Extension
H
W
6 - 101/4
-
-
6 3/4
-
101/2 - 161/4
-
-
9 3/4
-
161/4 - 24
-
-
12 3/4
-
6 - 101/4
-
-
-
8 7⁄8
101/2 - 161/4
-
-
-
11 7⁄8
161/2 - 24
-
-
-
14 7⁄8
Blade Extension = Nominal Height/2 - 2.375
Thermal Blanket Option
Volume Controller Option
A volume controller is used to manually set the
blades at a given angle to regulate the airflow (24 in.
x 16 in. [610mm x 406mm] maximum). Adjusting the
cap screw will open and close the blades.
Ceramic fiber or mineral wool thermal blanket available.
Installation instructions available at www.greenheck.com.
Copyright © 2016 Greenheck Fan Corporation
CRD-1 Rev 11 April 2016
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