BAROMETRIC BY-PASS SET-UP PROCEDURE
BAROMETRIC BY-PASS SET-UP PROCEDURE
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
3
The direction of airflow can
be reversed on the PRD if
Contact EWC Controls Inc.,
Te c h n i c a l s u p p o r t i f
necessary for further details.
necessary, by pushing the
Door over the stop on the
bottom of the damper frame.
Then, adjust the arm to the
proper position based on the
n e w a i r f l o w d i r e c t i o n .
3
4
5
6
7
8
9
POSITION ARM IN IDEAL LOCATION IF
AIR FLOW IS IN DIRECTION INDICATED
BY THE ARROW ABOVE
ID
E
A
L
A
R
M
LO
C
AT
IO
N
ID
E
A
L A
R
M
LO
C
AT
IO
N
AIRFLOW
AIRFLOW
POSITION ARM IN IDEAL LOCATION IF
AIR FLOW IS IN DIRECTION INDICATED
BY THE ARROW ABOVE
ARM
GRADUATED
ADJUSTMENT
SCALE
THUMB
SCREWS
IDEAL
ARM
LOCATION
WEIGHT #1
EXTRA WEIGHT
ID
EA
L
AR
M
LO
C
AT
IO
N
AIRFLOW
POSITION ARM
IN IDEAL
LOCATION
0
1
Model PRD - RD Round Bypass Damper
IDEAL
ARM
LOCATION
WEIGHT #1
THUMB
SCREWS
ARM
GRADUATED
ADJUSTMENT
SCALE
EXTRA WEIGHT
Model PRD - Rectangular Bypass Damper
This arm position reflects
Air-flow from Left to Right!
This arm position
reflects Air-flow from
Right to Left!
