Greenheck CRD-1B User Manual

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*

Frame Type Standard Top, Bottom,

Blades Galvanized

Steel*

Fusible Link

165°F (74°C) 212°F (100°C)

Temperature

Blade Insulation

Under 115.46

sq. in.

Not required -

(74,490 sq. mm)

Over 115.46

sq. in.

Non-asbestos

UL classiﬁed

(74,490 sq. mm)

* in gauges required by UL listing R13446

or Top/Bottom

Extension

CRD-1

Ceiling Radiation Damper

Rectangular

“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 (#3226-0987:101) New York City MEA Listing #260-91-M

W & H

Minimum

Size

Inches 4 x 6 24 x 24

Maximum Size

*W & H dimensions furnished approximately 1/4 in. (6mm) under size.

mm 101 x 152 610 x 610

Frame Option Dimensions

Damper Model Height (in.) A B C D

CRD-1 Standard Frame 6 - 24 2

⁄16 - - -

CRD-1B Bottom Extension 6 - 24 - 4 ¾ - -

6 - 10¼ - - 6 ¾ -

CRD-1T Top Extension

10½ - 16¼ - - 9 ¾ -

16½ - 24 - - 12 ¾ -

CRD-1BT Bottom and Top Extension

6 - 10¼ - - - 8

10½ - 16¼ - - - 11 7⁄8

16½ - 24 - - - 14 7⁄8

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.

Thermal Blanket Option

Ceramic fiber or mineral wool thermal blanket available.

⁄8

Installation instructions available at www.greenheck.com.

CRD-1 Rev 7 April 2009