EWC Controls CLBD Technical Bulletin

The model CLBD Bypass Damper is an easy and economical way to manage system static pressure, in a zoned HVAC system.
Damper adjustment is easily achieved by increasing or decreasing the force applied to the bypass damper blade, until the
desired static pressure is achieved. See Page 2 for details.
Due to the constant load applied to the damper blade and the unique magnetic latch, the CLBD Bypass Damper can be installed
in any position on your bypass duct-work, to manage the HVAC system's static pressure during zoned operations.
The CLBD minimizes bypass volume, while still preventing the HVAC system static pressure from rising above the selected
Static Pressure set-point.
The CLBD is a basic, cost effective Bypass Solution for Constant Speed or Variable Speed "zoned" HVAC systems.
MODEL #
SIZE "A" Dimension
CLBD 8 8"
CLBD 10
10"
CLBD 12 12"
14"
CLBD 14 14"
CLBD 16 16"
Bypass CFM Chart
MODEL #
SIZE
CLBD 8
8"
CLBD 10
10"
CLBD 12
12"
CLBD 14 14"
CLBD 16
16"
Return Air
from
All Zones
Ultra-Zone
™
RD-HD
Hand
Damper
(if required)
Note:
This drawing of the Bypass damper, Balancing Hand Damper, and Related duct work is intended to serve only as a guide. Your actual
duct work layout and components may differ. Use the graphic as a guide when planning or designing a Zone system regardless of the Equipment
type, Duct layout and Airflow configuration.
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
P/N 090375A0250 REV. E
"B" Dimension
8"
12"
10" 12"
12"
14"
16"
16" 20"
A
CFM
400
700
1100
1700
2200
6ft. if possible
HVAC
Ultra-Zone™
Zone Control
©
Copyright September
Constant Load ByPass Damper
Leave this bulletin on the job site for future reference!
Static Pressure
Adjustment Knob
6ft. if possible
UNIT
Supply
Air
Sensor
Panel
2015 EWC Controls All Rights Reserved
Model CLBD
Static Pressure
Set-Point Indicator
B
Supply Air
to
Zone Dampers
CLBD
Ultra-Zone ™
CL BD
CONSTANT LOAD
-
BYPASS DAMPER
E-Mail- info@ewccontrols.com
Damper Blade
Position Indicator
1