Greenheck CRD-2BT User Manual

CRD-2

Application and Design

The CRD-2 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 diffusers up to 24 in. (610mm) diameter maximum size when installed with an approved thermal blanket.

Construction Standard Optional

Frame

Frame Type

Blades

Fusible Link Temperature

Under 115.46 sq. in.

Blade Insulation

(10 3/4 in. diameter)

Over 115.46 sq. in.

(10 3/4 in. diameter)

* in gauges required by UL listing R13446

W & H

Minimum

Size

Inches 5 24

mm 127 610

Galvanized

Steel*

Standard Top, Bottom,

Galvanized

Steel*

165°F (74°C) 212°F (100°C)

Not required -

Non-asbestos

UL classiﬁed

Maximum

Size

or Top/Bottom

Extension

Ceiling Radiation Damper

Round

“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

New York City MEA Listing #260-91-M CSFM California State Fire Marshal Fire Damper Listing (#3226-0987:101)

Damper Model

CRD-2 Standard Frame

CRD-2B Bottom Extension

CRD-2T Top Extension

CRD-2BT Bottom and Top Extension

Frame Option Dimensions

Diameter

(in.)

5 - 24 3

A B C D

⁄16 - - -

5 - 24 - 4 ¾ - -

5 - 11¼ - - 7 ½ -

11½ - 17¼ - - 10 ½ -

17½ - 24 - - 13 ½

5 - 11¼ - - - 9

11½ - 17¼ - - - 12 15⁄16

⁄16

17½ - 24 - - - 15 7⁄8

*D dimension is actual O.D. of damper. Specify “ 1/4 in. (6mm) under size” for dampers to be installed inside steel ducts.

Volume Controller Option

A volume controller is used to manually set the blades at a given angle to regulate the airflow (24 in. [610mm] maximum). Adjusting the cap screw will open and close the blades.

Thermal Blanket Option

Ceramic fiber or mineral wool thermal blanket available.

Installation instructions available at www.greenheck.com

CRD-2 Rev. 7 April 2009