42
RECTANGULAR BYPASS SELECTION TABLE
Bypass air in CFM. Calculated at 1500 FPM.
Formula used: B = W x H / 144 x 1500, where B = Bypass air in CFM, W = damper width in inches, H = damper height in inches,
144 = 144 sq. inches per sq. ft., 1500 = 1500 FPM.
ROUND AND RECTANGULAR
BYPASS DAMPER MOTORS
SLAVING BYPASS DAMPERS
Use only one Pressure Sensor when slaving two or more
Bypass Dampers together. Connect the Pressure Sensor
to one damper as described above. Connect the slave
dampers in parallel as shown. Up to 4 dampers can be
slaved to one Sensor. The slaved dampers will self-
synchronize each time the dampers reach full open or full
close.
To Static Pressure Control, as shown on the Bypass
Wiring Diagram on the next page.
WIDTH IN INCHES
8
10
12
14
16
18
20
22
24
28
32
36
40
44
48
8
667
833 1000 1167 1333 1500
1667
1833
2000
2333
2667
3000
3333
3667
4000
10
833 1042 1250 1458 1667 1875
2083
2292
2500
2917
3333
3750
4167
4583
5000
12
1000 1250 1500 1750 2000 2250
2500
2750
3000
3500
4000
4500
5000
5500
6000
14
1167 1458 1750 2042 2333 2625
2917
3208
3500
4083
4667
5250
5833
6417
7000
16
1333 1667 2000 2333 2667 3000
3333
3667
4000
4667
5333
6000
6667
7333
8000
18
1500 1875 2250 2625 3000 3375
3750
4125
4500
5250
6000
6750
7500
8250
9000
20
1667 2083 2500 2917 3333 3750
4167
4583
5000
5833
6667
7500
8333
9167 10000
22
1833 2292 2750 3208 3667 4125
4583
5042
5500
6417
7333
8250
9167 10083 11000
24
2000 2500 3000 3500 4000 4500
5000
5500
6000
7000
8000
9000 10000 11000 12000
28
2333 2917 3500 4083 4667 5250
5833
6417
7000
8167
9333 10500 11667 12833 14000
32
2667 3333 4000 4667 5333 6000
6667
7333
8000
9333 10667 12000 13333 14667 16000
36
3000 3750 4500 5250 6000 6750
7500
8250
9000 10500 12000 13500 15000 16500 18000
40
3333 4167 5000 5833 6667 7500
8333
9167 10000 11667 13333 15000 16667 18333 20000
44
3667 4583 5500 6417 7333 8250
9167 10083 11000 12833 14667 16500 18333 20167 22000
48
4000 5000 6000 7000 8000 9000 10000 11000 12000 14000 16000 18000 20000 22000 24000
H
EI
G
H
T I
N
INCH
ES
RC RO MC
RC RO MC
DAMPER
ACTUATOR
* * *
SLAVE
DAMPER
ACTUATOR
* * *
TO NE
X
T SLAVE
BYPASS DAMPER
IF APPLICABLE
RC
RO
MC
RECTANGULAR BYPASS SELECTION TABLE