Carnes ESZA User Manual
CARNES COMPANY 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: (608)845-6411 Fax: (608)845-6504 www.carnes.com
COPYRIGHT © 2012 CARNES COMPANY
ALL RIGHTS RESERVED
40072, pg 1
SPECIFICATION SHEET
Low Leakage Smoke Damper, Class I
Model ESZA - True Round
Tag Qty.
Size
Variations
Width Height
Project Location
Arch./Engr. Contractor
Representative Date
t Application and Design
The Model ESZA is a UL/ULC listed and labeled Class
I leakage rated True Round Smoke Damper. Blades
are of the double thickness, round design. The damper
is approved for airflow in either direction and provides
a maximum leakage of 8 cfm/sq. ft. at 4” w.c. s.p. It has
been designed to be installed in a vertical or horizontal
mounting position in the ductwork or a separate sleeve
within 24” of the smoke partition. These dampers are
approved for use in engineered smoke control systems
and are controlled via smoke detection system.
Electric (24v, 120v and 230v) or pneumatic actuators
are used to operate the smoke dampers.
Standard Construction:
Frame: roll formed frame, galvanized steel,
16” integral sleeve
Blades: double thickness galvanized steel of roll
formed construction
Bearings: bronze oilite, press-fit into frame
Axles: square, plated steel
Seals: pressure sensitive 450°F silicone blade edge
seals and flexible metal jamb seals
Linkage: jackshafted to blade
Designed and tested in accordance to standards: UL 555S, ULC
S112.1. Labeled and listed by UL/ULC under File # R26359.
They meet all the NFPA 90A, IBC Code and other major code
requirements for Smoke Dampers.
Options:
Extended Sleeve
Electric Actuator
Pneumatic Actuator, 25 psi
Remote Control Box (EXRA)
Retaining Angles Smoke Detector
One Side Ionization
Both Sides Photoelectric
Mounting
Horizontal Vertical
Notes:
• Dampers are furnished approximately 1/8” smaller than
given duct dimensions.
• Not recommended with blades running vertically.
Standard
16”
(406mm)
UL 555S CLASSIFIED AT
250°F OR 350°F DEPENDING
UPON MOTOR/OPERATOR
Manufacturer’s Recommendations
All moving parts of the damper must be inspected and cycled at intervals not greater than every 12 months or in
accordance with the latest of NFPA 90A, 92A, local codes and the actuator manufacturer. In addition, the damper shall be
removed and inspected for corrosion. Dry lubricants are recommended.
Standard Sizes (duct)
Min. V or H
8” - 24” Diameter
203mm - 610mm
40072, pg 2
Model ESZA - Low Leakage Smoke Damper, Class I Rated
True Round
UL 555S Classified and ULC S112.1 Listed
PERFORMANCE DATA
Pressure drop testing was done by an independent laboratory to the AMCA Standard 500-D, Fig. 5.3
ductwork upstream and downstream.
Leakage obtained in test of 8” diameter and 24” diameter was less than 1 cfm/sq. ft.
PRESSURE DROP
FACE VELOCITY (FPM)
PRESSURE DROP - INCHES OF WATER (In. W.C.)
1.00
.80
.60
.50
.40
.30
.20
.10
.08
.06
.05
.04
.03
.02
.01
100
1000 10000
223344556688
8” DIAMETER
24” DIAMETER
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