FOR FLOATING / 2-POSITION CONTROL
GENERAL
These direct-coupled damper actuators provide two-position
and floating control for:
• air dampers,
• VAV units,
• air handlers,
• ventilation flaps,
• louvers, and
• reliable control for air damper applications with up to
50 sq.ft. (4.6 m
/ 301 lb-in (34 Nm) (seal-less damper blades; air frictiondependent).
FEATURES
• New self-centering shaft adapter
• Access cover to facilitate connectivity
• Declutch for manual adjustment
• Mechanical end limits
• Field-installable auxiliary switches
• Rotation direction selectable by switch
• Mountable in any orientation (no IP54 if upside down)
• Mechanical position indicator
• UL-approved
2
) / 177 lb-in (20 Nm) or 85 sq. ft. (7.8 m2)
KA-175-2T
KA-301-2T
DAMPER ACTUATORS 177/301 lb-in
PRODUCT DATA
SPECIFICATIONS
Supply voltage 24 Vac ±15%, 50/60 Hz
Nominal voltage 24 Vac, 50/60 Hz
All values stated hereinafter apply to operation under
nominal voltage conditions.
Power consumption
KA-175-2T 6 VA / 6 W
KA-301-2T 9 VA / 9 W
Ambient limits
Ambient operating limits -5...+140 °F (-20...+60 °C)
Ambient storage limits -40...+175 °F (-40...+80 °C)
Relative humidity 5...95%, non-condensing
Cables
Length 39" (1 m)
Materials silicone-free
Safety
Protection standard NEMA2
Protection class II as per EN 60730-1
Overvoltage category II
Lifetime
Full strokes 60000
Repositions 1.5 million
Mounting
Round damper shaft 3/8...1-1/16" (10...27 mm)
Square damper shaft 3/8...11/16"(10...18 mm);
45° steps
Shaft length min. 7/8" (22 mm)
Auxiliary switch (when included)
Rating 5 A (resistive) / 3 A (inductive)
Triggering points 5° / 85°
Torque rating
KA-175-2T 177 lb-in (20 Nm)
KA-301-2T 301 lb-in (34 Nm)
Runtime 95 sec (60 Hz) / 110 sec (50 Hz)
Rotation stroke 95° ± 3°
Dimensions see "Dimensions" on page 6
Weight (without cables) 3 lbs. 3 oz. (1.45 kg)
Noise rating 40 dB(A) max. at 1 m
U
R
L
C US LISTED
EN0B-0320GE51 R0903
KA-175-2T, KA-301-2T
PRODUCT IDENTIFICATION SYSTEM
KA
Kele Actuator, Non-Spring Return
175
301
KA
OPERATION / FUNCTIONS
175
175 in-lb
300 in-lb
2T
P
floating / 2-position
proportional
2T
Fig. 1. Product Identification System
Legend for Fig. 2:
1 Self-centering shaft adapter
2 Retainer clip
3 Rotational angle scales (0...90° / 90...0°)
4 Mechanical end limits (177 lb-in [20 Nm] m8odels, only)
5 Declutch button
6 Anti-rotation bracket
7 Rotation direction switch
8 Access cover
9 Internal auxiliary switch wire
10 Power and control switch wire
Fig. 2. Setting units and control elements
EN0B-0320GE51 R0903 2
Contents of Package
The delivery package includes the actuator itself, parts 1
through 8 (see Fig. 2), the anti-rotation bracket screws, and
the SM mounting plate and screws.
Rotary Movement
The rotation direction (clockwise or counterclockwise) can be
selected using the rotation direction switch (see part 7 in Fig.
2), thus eliminating the need to re-wire. To ensure tight
closing of the dampers, the actuator has a total rotation
stroke of 95°.
As soon as operating power is applied, the actuator may start
to run. When power is removed, the actuator remains in
position. For actuator-controller wiring instructions, see
section "Wiring" on page 4.
KA-175-2T, KA-301-2T
Rotation Direction Switch
Fig. 3. Rotation Direction Switch
• Dir (" ") is the default shipping position. When the
rotation direction switch is set to this position, the
actuator internally switches the rotation direction control
signals as stated in section "Wiring Diagrams" on pages
5 and Fehler! Textmarke nicht definiert..
• "Service/Off": When the rotation direction switch is set
to this position, all actuator rotary movement is cancelled
and all control signals are ignored, thus enabling the
actuator to be manually operated (see section "Manual
Adjustment"). The user can then perform maintenance /
commissioning without having to remove power from the
actuator. To return to the control mode, simply move the
rotation direction switch to its former setting.
• Rev ("
this position, the actuator follows signals as stated in
section "Wiring Diagrams" on pages 5 and Fehler!
Textmarke nicht definiert..
"): When the rotation direction switch is set to
Two-Position or Floating Control
The actuator is capable of being operated by either a twoposition (open/close) or a floating (three-wire) controller.
Refer to wiring diagrams for correct connection.
Manual Adjustment
IMPORTANT
To prevent equipment damage, you must remove
power or set the rotation direction switch to the
"Service/Off" position before manual adjustment.
After removing power or setting the rotation direction switch
to the "Service/Off" position, the gear train can be
disengaged using the declutch button, permitting the actuator
shaft to be manually rotated to any position. The feedback
signal will then follow the new position.
Limitation of Rotation Stroke
Two adjustable mechanical end limits (177 lb-in [20 Nm]
models, only) are provided to limit the angle of rotation as
desired (see Fig. 5).
Fig. 5. Mechanical end limits
The mechanical end limits must be securely fastened in
place as shown in Fig. 6. Specifically, it is important that they
properly mesh with the rotational angle scales when the
screws are tightened.
Position Indication
The hub adapter indicates the rotation angle position by
means of the rotational angle scales (0...90° / 90...0°)
provided in the actuator plate (see Fig. 4).
90 90
60
30
Fig. 4. Position indication
60
30
00
Fig. 6. Correct / incorrect tightening of end limits
3 EN0B-0320GE51 R0903
KA-175-2T, KA-301-2T
INSTALLATION
These actuators are designed for single-point mounting.
Wiring
IMPORTANT
In order to prevent equipment damage, you must
remove power or set the rotation direction switch to
the "Service/Off" position before manual operation.
Mounting Instructions
All information and steps are included in the Installation
Instructions supplied with the actuator.
Mounting Position
The actuators can be mounted in any position (no IP54 if
mounted upside down; see Fig. 7). Choose a mounting position permitting easy access to the actuator's cables and
controls.
IP54 IP54IP54 IP54
Connecting to the Power Supply
In order to comply with protection class II, the power source
of 24 V actuators must be reliably separated from the network power supply circuits as per DIN VDE 0106, part 101.
Access Cover
To facilitate wiring the actuator to the controller, the access
cover can be detached from the actuator.
IMPORTANT
Remove power before detaching the access cover.
Once the access cover has been removed, please
take care to avoid damaging any of the parts now
accessible.
4
3
2
Fig. 8. Access cover
Fig. 7. Mounting for IP54
Mounting Bracket and Screws
If the actuator is to be mounted directly on a damper shaft,
use the mounting bracket and screws included in the delivery
package.
Self-Centering Shaft Adapter
The self-centering shaft adapter can be used for shafts
having various diameters (3/8...1-1/16" [10...27 mm]) and
shapes (square or round).
In the case of short shafts, the shaft adapter may be
reversed and mounted on the duct side.
Stroke Limitation with Mechanical End Limits
The mechanical end limits (177 lb-in [20 Nm] models, only)
enable the stroke to be limited from 0...90° in increments of
3°.
Depending upon the model, the access cover may have one
or two terminal strips, including a layout with a description for
each of the terminals.
Fig. 9. KA-175-2T with access cover removed
EN0B-0320GE51 R0903 4
Wiring Diagrams
KA-175-2T, KA-301-2T
KA-175-2T, KA-301-2T
direction
4
3
2
TERMINAL STRIP 1
24
Vac ~
24
V
4
3
2
Connect via safety isolating transformer!
!
TWO-POSITION CONTROL
connecting cable wire print terminal
supply and signal lines (must be equipped
with spark suppressors)
rotation
switch
rotation
direction
4
Dir
Service/O ff
Rev
24
M
Vac ~
~
24
V
Connect via safety isolating transformer!
!
FLOATING CONTROL
(not applicable to the N2024-2POS)
switch
4
3
3
2
2
Dir
Service /Off
Rev
M
~
name
floating two-position
2 2 24 Vac ⊥ 24 Vac ⊥
3 3 24 Vac (clockwise) 24 Vac ∼
4 4 24 Vac (counterclockwise) 24 Vac control signal
EN0B-0320GE51 R09035
KA-175-2T, KA-301-2T
DIMENSIONS
100 mm (3-15/16”)
shaft
adapter
min. 60 mm (2-3/8” )
adapter (reverse)
20.6 mm
(1-3/16”)
shaft
95°
60
90
48 mm
(1-7/8”)
223 mm (8-25/32”)
30
0
92 mm (3-5/8”)
1000 mm (39”)
Kele
3300 Brother Blvd.
Memphis, TN 38133
EN0B-0320GE51 R0903
20 mm (25/32”)
2 mm (5/64”)
132 mm (5-3/16”)
230 mm [+/- 0.5 mm] (9-1/16” [+/-1/64”])
7 mm (9/32”)
13 mm (1/2”)
5 mm (+0.05, -0.10 mm)
25/128” (+0.002, -0.004”)
anti-rotation bracket
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