5
I20683 - Subject to change.
The “10 questions” method for sizing and selection is recom-
mended as the best method for your actuation requirements.
Use the ‘Application Data’ column in this chart as a worksheet
to help in the selection process. This data, along with the
‘Actuator Product Range’ charts on pages 2 and 3, allow for the
best selection of a Trane actuator.
Damper with square shape: ft
2
= h x w /144; (h= high, w= width)
Damper Area (8 ft
2
) x Rated Torque Loading of Damper (4 in-lb/ft
2
) = Total in-lb Required (32 in-lb) TLF/TLM 35 in-lb
Torque Loading in-lb/ft
2
< 1000 FPM
FPM
FPM
Damper Blade
2 inch water column
1000-2500
2500-3500
Parallel blade/edge seals
7
10.5
14
Opposed blade/edge seals
5
7.5
10
Parallel blade/no edge seals
4
6
8
Opposed blade/no edge seals
3
4.5
6
Round
10
14
20
Sizing and Selecting Actuators
This will impact
the proper
selection as the
seals add resist-
ance requiring
more torque.
If this informa-
tion is not
available refer
to the “typical
damper
requirements”
chart.
Systems above 1,000 FPM
require additional actuator torque
FAN
FAN
E
OA
R
SA
A = MIXING PLENUM
∆
P
T
∆
P
D
∆
P
D
∆
P
D
∆
P
T
∆
P
T
A
B
OA
Consider the application. Is the actu-
ator/damper exposed to outside air?
use spring return.
• Two position
• Floating point
• Modulating
• Sequencing
• “Non-standard”
voltage signals
This will be a critical component to the
damper selection of an actuator.
Controller
If unknown use
a worst case sce-
nario, parallel blade
with seals.
L” x W” = Total sq
inches/144 = total
sq feet
Typical Damper Requirements and Sizing
SQUARE
What is the
total area of
the damper?
Opposed blade
or parallel
blade control
construction?
Are there
blade and
edge seals on
the damper?
For the
damper in
question,
what does the
manufacturer
specify as the
torque rating?
What is the air
velocity, static
pressure or
design CFM?
Is fail-safe
required?
What is
the supply
voltage to
the actuator?
•
24 VAC/DC
What is
the control
signal to the
actuator?
Can you direct
couple to a
damper shaft?
Are there
additional
accessories
required?
___________
sq. ft.
❑
Opposed
Blade
❑
Parallel
Blade
❑
YES
❑
NO
___________
in-lb/sq. ft.
_______W.G.
_______CFM
_______FPM
❑
YES
❑
NO
❑
24 VAC
❑
On/Off
❑
Floating
Point
❑
2-10 VDC
❑
4-20 mA
❑
YES
❑
NO, see
accessories
page
❑
NO
❑
YES, see
accessories
section or
actuator
series for
details
Opposed Blade
w/o seals 3 in-lb/sq feet
Opposed Blade
w/ seals 5 in-lb/sq feet
Parallel Blade
w/o seals 4 in-lb/sq feet
Parallel Blade
w/ seals 7 in-lb/sq feet
Do you need
a step down
transformer?
If replacing an oil
immersed gear
train actuator. Is
the transformer in the defective actua-
tor? You may need to purchase one.
Direct cou-
pling has
become the
industry stan-
dard. Some
retrofit appli-
cations do not
allow direct
coupling.
Some applications require the additions of
an auxiliary switch for proof of position. Or
a retrofit application may require an addi-
tional mounting bracket and linkage kit.
You must identify these needs prior to
leaving the job site or ordering products.
KH-AF US
KH-AF-1 US
K4-2 US
PA…
SA…
Application
Criteria
Data
1
2
3
4
5
Application
Criteria
Data
6
7
8
9
10
Summary of Contents for TRANE TAF Series
Page 7: ...Notes Work Pad 7 I20683 Subject to change...
Page 27: ...27 I20683 Subject to change TAF Notes Work Pad...
Page 57: ...57 I20683 Subject to change TLF Notes Work Pad...
Page 73: ...73 I20683 Subject to change TTF Notes Work Pad...
Page 98: ...98 I20683 Subject to change Notes Work Pad...
Page 165: ...165 I20683 Subject to change Wiring Guide Notes Work Pad...
Page 166: ...Notes Work Pad 166 I20683 Subject to change...
