Cook Curtain Style Ceiling Radiation Damper User Manual download pdf

4-3/16

Gemini

Fire Rated

Ceiling Assembly

3-5/8

A x B

#10 x 3/4 speed screws

2 per side minimum

6" max spacing

Grille

1/4" X 20 tpi "all-thread"

or 12 ga steel hanging wire

Hanging Vibration Isolator

(Optional)

Ceiling Radiation Damper

Structural Support

CRD Model #

Gemini Fan Model A

CRD1 120 14-1/2 12-3/8 6-3/16

CRD1 140 14-1/2 12-3/8 6-3/16

CRD1 160 14-1/2 12-3/8 6-3/16

CRD1 180 14-1/2 12-3/8 6-3/16

CRD2 220, 240 12-5/8 10-1/8 5-1/16

CRD3 320, 340 12-5/8 11-1/8 5-9/16

CRD4 420 17-5/8 12-1/4 6-1/8

CRD4 520 17-5/8 12-1/4 6-1/8

CRD4 620 17-5/8 12-1/4 6-1/8

CRD4 640 17-5/8 12-1/4 6-1/8

CRD4 720 17-5/8 12-1/4 6-1/8

CRD4 740 17-5/8 12-1/4 6-1/8

Loren Cook Company’s curtain style ceiling radiation damper models CRD1, CRD2, CRD3 and CRD4 are classiﬁed by UL to

function as heat barriers in air handling penetrations through ﬁre resistive membrane ceiling assemblies. These dampers are

for use in lieu of hinged door type dampers in ﬁre resistive ﬂoor-ceiling or roof-ceiling designs which contain air ducts and

specify hinged door type dampers over each duct outlet, as covered in UL’s Fire Resistance Directory. The CRD dampers can be

installed either with a speciﬁc size Loren Cook Company Model Gemini fan as a listed fan and damper assembly or as a stand-

alone damper. The following installation instructions show the recommended installation procedures for the CRD’s with the

Gemini fan. If the CRD is installed as a stand-alone damper, then a 16 ga. steel support channel must be attached to the

damper. Use 12 SWG galvanized steel wire or all thread to attach the damper to a supporting structural member. Where it is

necessary to cut a main runner or cross tee, each cut end shall be supported by a vertical No. 12 SWG hanger wire. A 1/2”

(13mm) clearance shall be maintained between the duct outlet and each cut end at main runner and cross tee. The duct outlet

shall be located so that no more than one main runner or cross tee is cut when penetrating the ceiling membrane. Consult with

local authorities that have jurisdiction with regard to local codes and guidelines regarding installation.

Curtain Style Ceiling Radiation Damper

INSTALLATION INSTRUCTION

Meets NFPA 90A requirements.

Meets BOCA, SBCCA, UBC requirements.

The City of New York 460-88-5A

California State Fire Marshall 3225-0935:102

Curtain Style Ceiling Radiation Dampers - January 2002

See details on

UL Classiﬁcation Marking

on enclosed product.

INSTALLATION INSTRUCTION 1

Summary of Contents

Page 1 - INSTALLATION INSTRUCTION

1 4-3/16ABCGeminiFire RatedCeiling Assembly3-5/8A x B#10 x 3/4 speed screws2 per side minimum6" max spacingGrille1/4" X 20 tpi "all-th

Comments to this Manuals

No comments

Cook Curtain Style Ceiling Radiation Damper User Manual

Browse online or download User Manual for Kitchen Cook Curtain Style Ceiling Radiation Damper. COOK Curtain Style Ceiling Radiation Damper User Manual

Summary of Contents

Comments to this Manuals

Related products and manuals for Kitchen Cook Curtain Style Ceiling Radiation Damper