Carnes EDHA User Manual

CARNES COMPANY 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax: [phone] www.carnes.com

COPYRIGHT © 2012 CARNES COMPANY

ALL RIGHTS RESERVED

40091

SPECIFICATION SHEET

Ceiling Radiation Damper - Fabric Type Blade,

Square/Rectangular to Round

Model EDHA - One Round Transition; Model EDJA - Two Round Transitions

Tag Qty.

Size

Variations

Width Height

Project Location
Arch./Engr. Contractor
Representative Date

t Application and Design

The Models EDHA and EDJA are square/rectangular
UL classified ceiling (radiation) dampers, fabric blade
style, with a round transition mounted to the top side
approved for both steel duct and flex duct installations
in approved UL ceiling designs that incorporate/show a
hinged door damper requiring fire/heat protection
where HVAC components penetrate the ceiling mem­brane. This damper has a low profile design that allows
for installation in ceilings with restricted space as well
as transitioning from a square neck diffuser to a round
duct. The folded blade package allows for maximum
free area and lowest pressure drop. These dampers
provide protection up to 24” x 24” openings.

Standard Construction:

Frame: roll formed, 22 ga. galvanized steel
Blades: 22 ga. galvanized steel with UL classified

insulated fabric blades

Spring: stainless steel negator
Fusible Link: replaceable 212°F (100°C) standard

(others available)
EDHA: one round transition - top

EDJA: two round transitions - top and bottom

Designed and tested in accordance to standards: UL 555C, ULC
S112.2. Labeled and listed by UL/ULC under File # R26251.
They meet all the NFPA 90A, IBC Code and other major code
requirements for Ceiling (Radiation) Dampers.

Manufacturer’s Recommendations

All moving parts of the damper must be inspected and cycled once the first year and at intervals not greater than every
4 years or in accordance with the latest edition of NFPA 90A, 92A, local codes and the manufacturer. In addition, fuse links shall
be removed and inspected for corrosion. Dry lubricants are recommended.

Standard Sizes

Min. Size Max. Size

L x W D L x W D

6” x 6”

152mm x 152mm

4” Diameter

102mm

24” x 24”

610mm x 610mm

22” Diameter

559mm

+ Duct dimension less 1/4” (6mm) unless ordered actual size.

3-3/4”

(95mm)

W+

L+

D+

Diameters:
Min. 4” (102mm)
Max. 22” (559mm)

Options:

 Thermal Blanket - 1/8” Thick (24 x 24)
 Alternate Thermal Blanket 1-1/4” Batt

(24 x 24)