Submittal Sheet

AIR FLOW
Installing the SBD Bypass Damper:
The pitot tubes and reference tubing are included with
the SBD. Make sure you have removed these items
from the shipping box before you throw the box away!
Due to the unique design and the self-balancing
feature of the SBD, there is no need to install and
setup a separate bypass balancing hand damper.
Mount both pitot tubes within 2 feet of the air handler on
the center line of the Supply & Return plenums. Observe
the direction of airflow stamped on the pitot tube
mounting plate. (See the graphic below)
Connect each pitot tube to the SBD barbed fittings using
the supplied 1/4" ID plastic tubing. Keep the plastic
tubing as short as possible with no kinks, cuts or nicks.
Connect 24vac power to the SBD.
Upon power-up, the SBD’s Power LED will glow solid
green. The yellow Bypass Setup button LED will blink, to
indicate the SBD is ready and waiting for you to press the
by-pass setup button LED and start the setup routine.
Preparing for Smart Bypass Setup:
Before pressing the Bypass Setup button LED, the
installer must confirm the following:
(1) Both pitot tubes have been properly installed.
(2) All zone dampers are in the open position.
(3) The HVAC system is running at full (CFM) speed.
(4) The air filter is new or clean.
Proceed to the Smart Bypass Setup Procedure!
Smart Bypass Setup Procedure:
Upon power-up, the Bypass Setup button LED is blinking
(waiting for setup routine).
1. With a pencil or pen, press the Bypass Setup button LED one time only.
A. The SBD will close and measure the system’s total static pressure.
B. The SBD will open and measure the system’s total static pressure.
C. The Bypass Setup LED will stop blinking and go out. You are Done!
D. Repeat the procedure if necessary.
E. The SBD will now control the system’s static pressure in all modes.
!
385 Hwy. 33 Englishtown, NJ 07726
Ph: 800-446-3110 - Fx: 732-446-5362
CONTROLS INC.
Excellence Without Compromise
E
W
C
Note: This drawing of the Smart Bypass Damper and bypass duct work is intended to serve as a guide.
Your actual duct configuration may differ. Just make sure all components are installed and setup correctly.
If required, call EWC Controls Technical Support for assistance.
EWC Controls Recommended Bypass Duct Configuration
Model SBD
Self-Balancing
Smart Bypass Damper
P/N 090377A0306 REV. B 11.26.14
SUBMITTAL SHEET
HVAC
UNIT
Return Air
from
All Zones
Supply Air
to
Zone Dampers
Ultra-Zone™
Zone Control
Panel
24vac
power
Supply Plenum
Pitot Tube
& Tubing
Return Plenum
Pitot Tube
& Tubing
S
B
D
M
otor Actuated
By
p
a
s
s
D
a
m
p
e
r
M
The pitot tube mounting plate
would look like this, when
properly mounted for airflow
that travels from left to right!
+
_
Connect the pitot/tubing from
the Supply duct to the + port.
Connect the pitot/tubing from
the Return duct to the - port.
+
E
wC
Excellence Without Comprimise
CONTROLS INC.
MADE IN SWITZERLAND
MA-SBD
18 in-lb (2Nm)
24 VAC/DC
4.0VA 2.0W
MANUAL
GEAR
RELEASE
0 1
1
2
-
+
POWER
BYPASS
SETUP
Press the Bypass
Setup button LED
!
III
IP54
With the SBD, there is
no need for a
separate
balancing
hand damper!
Unless you must comply
with California Title 24
or you want to
limit bypass volume
to a specific value.
Balancing
Hand
Damper