Greenheck LF120 US Installation Manual
64
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF Series Spring Return Direct Coupled Actuator
Minimum 35 in-lb torque
● For damper areas up to 8 sq-ft*
LF Series – At A Glance
*Based on 4 in-lb/ft2damper torque loading. Parallel blade. No edge seals. **Default 2 to 10 VDC. ***Default 150 seconds.
Torque: 35 in-lb ●●●●●●●●●●●●●●●●●●●
Power supply: 24 VAC/DC ●● ●●●●●●●●●●●●●
120 VAC ●●
230 VAC ●●
Control signal: on-off ●●●●●●
floating point ●●●●
proportional 2 to 10 VDC ●●●
6 to 9 VDC ●●
Multi-function** ●●
3kΩ NTC type
10 thermistor
●
10kΩ NTC type 7 thermistor ●
Feedback: 2 to 10 VDC ●●●●●
VDC variable** ●●●●
Auxiliary output, 20 VDC (to power controller) ●●
Running time motor: <75 sec ●●●●●●
150 sec constant ●●●●●
90 sec constant ●●
Adj. 75 to 300 sec.*** ●●●●
spring: <25 sec ●●●●●●●●●●●●●●●●●●●
External direction of rotation switch ●●●●●●●●●●●●●
Plenum rated cable, 18 GA ● ● ●●●●
Conduit fitting ●●●●●●●●●●●●●●●●●●●
Appliance cable ●●●●●● ●●● ● ●●●
Built-in auxiliary switch ●●●●●● ●●
LF24-SR-E US operation ..(p. 78) Installation instructions..(p. 88–92)
General wiring ..................(p. 93) Start-up and checkout ..(p. 94)
LF24 US (p. 66)
LF24-S US (p. 66)
LF120 US (p. 68)
LF120-S US (p. 68)
LF230 US (p. 68)
LF230-S US (p. 68)
LF24-3- US (p. 70)
LFC24-3-R US (p. 72)
LFC24-3-S US (p. 72)
LF24-3-S US (p. 70)
LF24-SR US (p. 74)
LF24-SR-S US (p. 74)
LF24-SR-E US (p. 76)
LF24-ECON-R03 US (p. 80)
LF24-ECON-R10 US (p. 80)
LF24-MFT US (p. 84)
LF24-MFT-S US (p. 84)
LF24-MFT-20 US (p. 86)
LF24-MFT-20-S US (p. 86)
Applications
Cost effective quality and performance
for a range of applications including:
• Classroom Unit Ventilators
• Fan/Coil Units
• VAV Terminal Units
• Economizer Units
• Airhandlers
• Control Dampers
Actuators in bold
have BDCM
©
®
65
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF
LF Series Spring Return Direct Coupled Actuator
®
● Cut labor costs with (10 min. installation) simple direct coupling.
Actuator Centers on 1/2” shaft (K6-1, 3/4” clamp optional).
● True mechanical spring return – the most reliable failsafe.
● Mount for clockwise or counterclockwise fail-safe.
● Easy-to-adjust mechanical stop to limit damper rotation.
● Check damper position easily with clear position indicator.
● Don’t worry about actuator burn-out.
Belimo is overload-proof throughout rotation.
● Need to change control direction?
Do it easily with a simple switch (modulating actuators).
● Built-in auxiliary switch is easy to use, offers feedback
or signal for additional device.
● Microprocessor-controlled brushless DC motor increases
actuator life span and reliability, provides constant running
time (modulating actuators).
● Rugged metal housing withstands rough handling in the
mechanical room.
● 3 ft. cable and conduit connector eases installation.
A CLOSER LOOK…
The Belimo Difference
● Customer Commitment.
Extensive product range. Application assistance.
Same-day shipments. Free technical support. Five year warranty.
●
Low Installation and Life-Cycle Cost.
Easy installation. Accuracy and repeatability.
Low power consumption. No maintenance.
●
Long Service Life.
Components tested before assembly. Every product tested before shipment.
30+ years direct coupled actuator design.
©
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF24 (-S) US
On-off, Spring Return Fail-Safe, 24 V
®
Torque min. 35 in-lb, for control of air dampers
Application
For on-off, fail-safe control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications. Control is on-off from an auxiliary contact, digital output, or a manual switch.
The actuator is mounted directly to a damper shaft from 3/8”
up to 1/2” in diameter by means of its universal clamp, 1/2”
shaft centered at delivery. For shafts up to 3/4” use K6-1
accessory. A crank arm and several mounting brackets are
available for applications where the actuator cannot be direct
coupled to the damper shaft.
Operation
The LF series actuators provide true spring return operation for
reliable fail-safe application and positive close off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The LF series provides 95° of rotation and is provided with a
graduated position indicator showing 0° to 95°.
The actuator may be stalled anywhere in its normal rotation
without the need of mechanical end switches. Power consumption is reduced in holding mode.
The LF24-S US version is provided with 1 built in auxiliary
switch. This SPDT switch is provided for safety interfacing or
signaling, for example, for fan start-up. The switching function
is adjustable between 0° and 95°. The auxiliary switch in the
LF24-S is double insulated so an electrical ground connection
is not necessary.
Dimensions
[All numbers in brackets are in millimeters.]
Technical Data LF24 (-S) US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 5 W; holding: 2.5 W
Transformer sizing 7 VA (class 2 power source)
Electrical connection 3 ft, 18 GA appliance cable
(LF24-S US has 2 cables)
1/2” conduit connector
Overload protection electronic throughout 0 to 95° rotation
Angle of rotation max. 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm]
Direction of rotation reversible with cw/ccw mounting
Position indication visual indicator, 0° to 95° (0° is spring
return position)
Auxiliary switch 1 x SPDT 3A (0.5A) @ 250 VAC,
UL listed
adjustable 0° to 95° (double insulated)
Running time motor: < 40 to 75 sec
spring: < 25 sec
@-4°F to +122°F [-20°C to +50°C]
< 60 sec
@-22°F [-30°C]
Humidity 5 to 95% RH non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing NEMA type 2 / IP54
Housing material zinc coated steel
Agency listings UL 873 listed, CSA C22.2 No.24
certified, CE
Noise level max: running < 50 db (A)
spring return 62 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight LF24 3.1 lbs (1.40 kg)
LF24-S 3.2 lbs (1.45 kg)
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
(LF24-S)
(nominal)
66
D010
Standard:
3/8" to 1/2"
3/8" to 7/16"
Optional
1/2" to 3/4"
w/K6-1
accessory
3.86"
[98]
1.93"
[49]
7.67" [195]
0.39" [10]
4.92" [125]
6.10" [155]
0.256" [6.5]
3.66" [93]
0.98"
[25]
0.71" [18]
0.25" [6.3]
0.79"
[20]
0.5"
[12.7]
0.74" [18.7]
2.24"
[57]
3.15" [80]
3.23" [82]
67
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF
LF24 (-S) US
On-off, Spring Return Fail-Safe, 24 V
®
Accessories
AV 10-18 Shaft extension (K6-1 is required)
IND-LF Damper position indicator
K6-1 Universal clamp for up to 3/4” diameter shafts
KH-LF Crankarm for up to 1/2” round shaft
Tool-06 8mm and 10 mm wrench
ZG-LF2 Crankarm adaptor kit for LF
ZG-112 Mounting bracket for Honeywell Mod IV, M6415
type actuators, and new installations
ZG-LF112 Crankarm adaptor kit for Honeywell Mod IV,
M6415 type actuators, and new installations
ZS-100 Weather shield (metal)
ZS-150 Weather shield (polycarbonate)
ZS-260 Explosion-proof housing
Note: When using LF24 US and LF24-S US actuators,
only use accessories listed on this page.
For Actuator Wiring Information and Diagrams,
Please See Belimo Wiring Guide (pg 349).
Wiring Diagrams
LF24 (-S) US Typical Specification
On-off spring return damper actuators shall be direct coupled
type which require no crankarm and linkage and be capable of
direct mounting to a shaft up to a 3/4” diameter and center a
1/2” shaft. The actuators must be designed so that they may
be used for either clockwise or counterclockwise fail-safe
operation. Actuators shall be protected from overload at all
angles of rotation. If required, 1 SPDT auxiliary switch shall be
provided having the capability of being adjustable. Actuators
with auxiliary switch must be constructed to meet the requirements for Double Insulation so an electrical ground is not
required to meet agency listings. Actuators shall be UL listed
and CSA certified, have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards.
Actuators shall be as manufactured by Belimo.
2
3
1
4
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption must be observed.
Actuator may also be powered by 24 VDC.
For end position indication, interlock control, fan startup, etc., LF24-S
US incorporates a built-in auxiliary
switch: 1 x SPDT, 3A (0.5A) @250 VAC, UL listed,
adjustable 0° to 95°.
Meets UL and CSA requirements without the need of an
electrical ground connection.
On-off wiring for LF24 US
On-off wiring for LF24-S US
W047
W048
2
3
Actuators may be connected in parallel. Power consumption must be observed.
Actuator may also be powered by 24 VDC.
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it maybe
necessary to work with live electrical components. Have a qualified licensed electrician
or other individual who has been properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical safety precautions when exposed
to live electrical components could result in death or serious injury.
24 VAC Transformer
Line
Volts
1 Common
2 + Hot
LF24 US
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it maybe
necessary to work with live electrical components. Have a qualified licensed electrician
or other individual who has been properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical safety precautions when exposed
to live electrical components could result in death or serious injury.
24 VAC Transformer
Line
Volts
3
2
1 Common
2 + Hot
S1
NC
S2
S3
NO
LF24-S US
3
4
0° to 95°
2
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
Torque min. 35 in-lb, for control of air dampers
Application
For on-off, fail-safe control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications. Control is on-off from an auxiliary contact, or a manual switch.
The actuator is mounted directly to a damper shaft from 3/8”
up to 1/2” in diameter by means of its universal clamp, 1/2”
shaft centered at delivery. For shafts up to 3/4” use K6-1
accessory. A crank arm and several mounting brackets are
available for applications where the actuator cannot be direct
coupled to the damper shaft.
Operation
The LF series actuators provide true spring return operation for
reliable fail-safe application and positive close off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The LF series provides 95° of rotation and is provided with a
graduated position indicator showing 0° to 95°.
The actuator may be stalled anywhere in its normal rotation
without the need of mechanical end switches. Power consumption is reduced in holding mode. The actuator is double
insulated so an electrical ground connection is not necessary.
The LF120-S US and LF230-S US versions are provided with
1 built-in auxiliary switch. This SPDT switch is provided for
safety interfacing or signaling, for example, for fan start-up.
The switching function is adjustable between 0° and 95°.
Dimensions
[All numbers in brackets are in millimeters.]
LF120 (-S) US / LF230 (-S) US
On-off, Spring Return Fail-Safe, 120/230 VAC
Technical Data LF120 (-S) US LF230 (-S) US
Power supply 120 VAC ± 10% 230 VAC ± 10%
50/60 Hz 50/60 Hz
Power consumption running: 5.5 W 5 W
holding: 3.5 W 3 W
Transformer sizing 7.5 VA 7 VA
Electrical connection 3 ft, 18 GA appliance cable
(-S models have 2 cables)
1/2” conduit connector
Overload protection electronic throughout 0 to 95° rotation
Electrical protection actuators are double insulated
Angle of rotation max 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm] constant torque
Direction of rotation reversible with cw/ccw mounting
Position indication visual indicator, 0° to 95° (0° is
spring return position)
Auxiliary switch 1 x SPDT 3A (0.5A) @ 250 VAC,
UL listed
(-S models) adjustable 0° to 95°
Electrical protection actuators are double insulated
Running time motor: < 40 to 75 sec
spring: < 25 sec
@-4°F to +122°F [-20°C to +50°C]
< 60 sec
@-22°F [-30°C]
Humidity 5 to 95% RH non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing NEMA type 2 / IP54
Housing material zinc coated steel
Agency listings UL 873, CSA C22.2 No. 24 Certified,
CE [LF230(-S) US]
Noise level max: running < 50 db (A)
spring return 62 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight LF120/230 3.4 lbs (1.54 kg)
LF120/230-S 3.5 lbs (1.60 kg)
(nominal)
68
D010
®
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
Standard:
3/8" to 1/2"
3/8" to 7/16"
Optional
1/2" to 3/4"
w/K6-1
accessory
3.86"
[98]
1.93"
[49]
7.67" [195]
0.39" [10]
4.92" [125]
6.10" [155]
0.256" [6.5]
3.66" [93]
0.98"
[25]
0.71" [18]
0.25" [6.3]
0.79"
[20]
0.5"
[12.7]
0.74" [18.7]
2.24"
[57]
3.15" [80]
3.23" [82]
69
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF
LF120 (-S) US / LF230 (-S) US
On-off, Spring Return Fail-Safe, 120/230 VAC
Accessories
AV 10-18 Shaft extension (K6-1 is required)
IND-LF Damper position indicator
K6-1 Universal clamp for up to 3/4” diameter shafts
KH-LF Crankarm for up to 1/2” round shaft
Tool-06 8mm and 10 mm wrench
ZG-LF2 Crankarm adaptor kit for LF
ZG-112 Mounting bracket for Honeywell Mod IV, M6415
type actuators, and new installations
ZG-LF112 Crankarm adaptor kit for Honeywell Mod IV,
M6415 type actuators, and new installations
ZS-100 Weather shield (metal)
ZS-150 Weather shield (polycarbonate)
ZS-260 Explosion-proof housing
Note: When using LF120/230 US and LF120-S/230-S US
actuators, only use accessories listed on this page.
For Actuator Wiring Information and Diagrams,
Please See Belimo Wiring Guide (pg 349).
LF120 (-S) US / LF230 (-S) US Typical Specification
On-off spring return damper actuators shall be direct coupled
type which require no crankarm and linkage and be capable of
direct mounting to a shaft up to a 3/4” diameter and center a
1/2” shaft. The actuators must be designed so that they may be
used for either clockwise or counterclockwise fail-safe operation. Actuators shall be protected from overload at all angles
of rotation. If required, 1 SPDT auxiliary switch shall be provided having the capability of being adjustable. Actuators must be
constructed to meet the requirements for Double Insulation so
an electrical ground is not required to meet agency listings.
Actuators shall be UL listed and CSA certified, have a 5 year
warranty, and be manufactured under ISO 9001 International
Quality Control Standards. Actuators shall be as manufactured by Belimo.
Wiring Diagrams
2
1
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption must be observed.
No ground connection is required.
2
3
1
3
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power con-
sumption must be observed.
No ground connection is required.
For end position indication, interlock control, fan startup, etc., LF120-S US and LF230-S US incorporate
one built-in auxiliary switch: 1 x SPDT, 3A (0.5A)
@250 VAC, UL listed, adjustable 0° to 95°.
Meets UL and CSA requirements without the need of an
electrical ground connection.
®
4
5
On-off wiring for LF120 US / LF230 US
On-off wiring for LF120-S US / LF230-S US
W049
W050
120 V AC
230 V AC
L1 N
1
L2 H
5
1 Neutral
2 Hot
3
120 V AC
230 V AC
L1 N
1
L2 H
1 Neutral
2 Hot
LF120 US
LF230 US
S1
3
2
5
NC
S2
S3
NO
LF120-S US
LF230-S US
4
0° to 95°
2
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF24-3 (-S) US
On-off, Spring Return Fail-Safe, Reversible, Floating Point, 24V
Torque min. 35 in-lb, for control of air dampers
Application
For modulation or on-off control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications.
The actuator is mounted directly to a damper shaft from 3/8”
up to 1/2” in diameter by means of its universal clamp, 1/2”
shaft centered at delivery. For shafts up to 3/4” use K6-1
accessory. A crank arm and several mounting brackets are
available for applications where the actuator cannot be direct
coupled to the damper shaft.
Control is floating point from a triac or relay, or on-off from an
auxiliary contact from a fan motor contactor, controller, or
manual switch.
Operation
The LF series actuators provide true spring return operation for
reliable fail-safe application and positive close-off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The LF series provides 95° of rotation and is provided with a
graduated position indicator showing 0 to 95°.
The LF24-3 (-S) US uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a
microprocessor. The microprocessor provides the intelligence to
the ASIC to provide a constant rotation rate. The ASIC monitors
and controls the brushless DC motor’s rotation and provides a
digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in
its normal rotation without the need of mechanical end switches.
Power consumption is reduced in holding mode.
The LF24-3-S US version is provided with 1 built-in auxiliary
switch. This SPDT switch is provided for safety interfacing or
signaling, for example, for fan start-up. The switching function
is adjustable between 0° and 95°. The auxiliary switch in the
LF24-3-S US is double insulated so an electrical ground is not
necessary.
Dimensions
[All numbers in brackets are in millimeters.]
Technical Data LF24-3 (-S) US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 2.5 W; holding: 1 W
Transformer sizing 5 VA (class 2 power source)
Electrical connection LF24-3 US 3 ft, plenum rated cable
LF24-3-S US 3 ft, 18 GA appliance
cables (2)
1/2” conduit connector
Overload protection electronic throughout 0 to 95° rotation
Input impedance 1000 Ω (0.6w) control inputs
Angle of rotation max. 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm]
Direction of rotation spring: reversible with cw/ccw mounting
motor: reversible with built-in switch
Position indication visual indicator, 0° to 95° (0° is
spring return position)
Auxiliary switch 1 x SPDT 3A (0.5A) @ 250 VAC,
UL listed
(LF24-3-SUS) adjustable 0° to 95° (double insulated)
Running time motor: 150 sec constant,
independent of load
spring: < 25 sec
@-4°F to +122°F [-20°C to +50°C]
< 60 sec
@-22°F [-30°C]
Humidity 5 to 95% RH non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing NEMA type 2 /IP54
Housing material zinc coated metal
Agency listings UL 873 listed; CSA C22.2 No. 24
certified, CE
Noise level max: running < 30 db (A)
spring return 62 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight LF24-3 3.1 lbs (1.40 kg)
LF24-3-S 3.6 lbs (1.45 kg)
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
®
70
D010
Standard:
3/8" to 1/2"
3/8" to 7/16"
Optional
1/2" to 3/4"
w/K6-1
accessory
3.86"
[98]
1.93"
[49]
7.67" [195]
0.39" [10]
4.92" [125]
6.10" [155]
0.256" [6.5]
3.66" [93]
0.98"
[25]
0.71" [18]
0.25" [6.3]
0.79"
[20]
0.5"
[12.7]
0.74" [18.7]
2.24"
[57]
3.15" [80]
3.23" [82]
71
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF
LF24-3 (-S) US
On-off, Spring Return Fail-Safe, Reversible, Floating Point, 24V
Accessories
AV 10-18 Shaft extension (K6-1 is required)
IND-LF Damper position indicator
K6-1 Universal clamp for up to 3/4” diameter shafts
KH-LF Crankarm for up to 1/2” round shaft
Tool-06 8mm and 10 mm wrench
ZG-LF2 Crankarm adaptor kit for LF
ZG-112 Mounting bracket for Honeywell Mod IV, M6415
type actuators, and new installations
ZG-LF112 Crankarm adaptor kit for Honeywell Mod IV,
M6415 type actuators, and new installations
ZS-100 Weather shield (metal)
ZS-150 Weather shield (polycarbonate)
ZS-260 Explosion-proof housing
Note: When using LF24-3 (-S) US actuators, only use
accessories listed on this page.
For Actuator Wiring Information and Diagrams,
Please See Belimo Wiring Guide (pg 349).
LF24-3 (-S) US Typical Specification
Floating point, on-off spring return damper actuators shall be direct coupled type which require no crankarm and linkage and be capable of direct
mounting to a shaft up to a 3/4” diameter and center a 1/2” shaft. The actuators must be designed so that they may be used for either clockwise or
counterclockwise fail-safe operation. Actuators shall have an external
direction of rotation switch to reverse control logic. Actuators shall use a
brushless DC motor and be protected from overload at all angles of rotation. If required, 1 SPDT auxiliary switch shall be provided having the
capability of being adjustable. Actuators with auxiliary switch must be
constructed to meet the requirements for Double Insulation so an electrical ground is not required to meet agency listings. Run time shall be
constant and independent of torque. Actuators shall be UL listed and CSA
certified, have a 5 year warranty, and be manufactured under ISO 9001
International Quality Control Standards. Actuators shall be as manufactured by Belimo.
®
28
3
24 VAC Transformer
a open
a closed
The indication of direction
is valid for switch position CW.
Blk (1) Common
Red (2) +
Wht (3) +
Grn (4) +
LF24-3 (-S) US
CW CCW
a
Line
Volts
WARNING
Live Electrical Components!
During installation, testing,
servicing and troubleshooting
of this product, it maybe
necessary to work with live
electrical components. Have
a qualified licensed electrician
or other individual who has
been properly trained in
handling live electrical
components perform these
tasks. Failure to follow all
electrical safety precautions
when exposed to live electrical
components could result in
death or serious injury.
Line
Volts
The indication of direction
is valid for switch position CW.
Blk (1) Common
Red (2) +
Wht (3) +
Grn (4) +
24 VAC Transformer
LF24-3 (-S) US
CW CCW
a
b
8
b
CCW
CW
stop
a
(3) (4)
stop stop stop
Installation Side
Direction of Rotation Switch
x
x
xx
x
x
x
x
xx
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
xx
x
x
xx
x
x
x
x
x
CW
CCW
Switch
Positions
CCW
CW
WARNING
Live Electrical Components!
During installation, testing,
servicing and troubleshooting
of this product, it maybe
necessary to work with live
electrical components. Have
a qualified licensed electrician
or other individual who has
been properly trained in
handling live electrical
components perform these
tasks. Failure to follow all
electrical safety precautions
when exposed to live electrical
components could result in
death or serious injury.
Wiring Diagrams
On-Off control of LF24-3 (-S) US
Triac source
Triac sink
Floating point control of LF24-3 (-S) US
Auxiliary switch of LF24-3 (-S) US
Triac sink with separate transformers
2
3
4
5
Actuators may be connected in parallel. Power consumption must be observed.
May also be powered by 24 VDC.
The Common connection from the actuator must be connected to the Hot con-
nection of the controller.
The actuator Hot must be connected to the control board Common.
For end position indication, interlock control, fan startup, etc., LF24-3-S US
LF120-S US and LF230-S US incorporate one built-in auxiliary switch: 1 x SPDT,
3A (0.5A) @250 VAC, UL listed, adjustable 0° to 95°.
Meets UL and CSA requirements without the need of an electrical ground connection.
Actuators with plenum rated cable do not have numbers on wires; use color
coded instead. Actuators with appliance rated cable use numbers.
6
8
Notes:
W053 W052
W051
W054W055W056
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it maybe
necessary to work with live electrical
components. Have a qualified licensed
electrician or other individual who has been
properly trained in handling live electrical
components perform these tasks. Failure to
follow all electrical safety precautions when
exposed to live electrical components could
result in death or serious injury.
S1
S2
S3
LF24-3-S US
NC
6
0° to 95°
NO
Line
Volts
WARNING
Live Electrical Components!
During installation, testing,
servicing and troubleshooting
of this product, it maybe
necessary to work with live
electrical components. Have
a qualified licensed electrician
or other individual who has
been properly trained in
handling live electrical
components perform these
tasks. Failure to follow all
electrical safety precautions
when exposed to live electrical
components could result in
death or serious injury.
24 VAC Transformer
Controller
2
ComHot
8
Blk (1) Common
Red
(2) + Hot
Wht
(3) +
(4) +
Grn
CW CCW
LF24-3 (-S) US
The indication of direction is
valid for switch position CW.
Line
Volts
WARNING
Live Electrical Components!
During installation, testing,
servicing and troubleshooting
of this product, it maybe
necessary to work with live
electrical components. Have
a qualified licensed electrician
or other individual who has
been properly trained in
handling live electrical
components perform these
tasks. Failure to follow all
electrical safety precautions
when exposed to live electrical
components could result in
death or serious injury.
24 VAC Transformer
Controller
ComHot
The indication of direction is valid for switch position CW.
8
2
Blk (1) Common
Red
(2) + Hot
Wht
(3) +
(4) +
Grn
CW CCW
LF24-3 (-S) US
4
5
24 VAC Transformer
2
8
Blk (1) Common
Red
(2) + Hot
Wht
(3) +
(4) +
Grn
CW CCW
LF24-3 (-S) US
The indication of direction is valid for switch position CW.
WARNING
Live Electrical Components!
During installation, testing,
servicing and troubleshooting
of this product, it maybe
necessary to work with live
electrical components. Have
a qualified licensed electrician
or other individual who has
been properly trained in
handling live electrical
components perform these
tasks. Failure to follow all
electrical safety precautions
when exposed to live electrical
components could result in
death or serious injury.
Line
Volts
24 VAC Transformer
Controller
Line
Volts
ComHot
5
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LFC24-3-R (-S) US
On-off, Spring Return Fail-Safe, Reversible, Floating Point, 24V, Trane Voyager Retrofit
Torque min. 35 in-lb, for control of air dampers
Application
For modulation or on-off control of dampers in HVAC systems.
Actuator sizing should be done in accordance with the damper
manufacturer’s specifications.
The actuator is mounted directly to a damper shaft from 3/8”
up to 1/2” in diameter by means of its universal clamp, 1/2”
shaft centered at delivery. For shafts up to 3/4” use K6-1
accessory. The ZG-LFC114 universal mounting kit can be
used with the LFC24-3-R US actuator for retrofit of the economizer section of the Trane Voyager unit.
Control is floating point from a triac or relay, or on-off from an
auxiliary contact from a fan motor contactor, controller, or
manual switch.
Operation
The LF series actuators provide true spring return operation for
reliable fail-safe application and positive close-off on air tight
dampers. The spring return system provides consistent torque
to the damper with, and without, power applied to the actuator.
The LF series provides 95° of rotation and is provided with a
graduated position indicator showing 0 to 95°.
The LFC24-3-R (-S) US uses a brushless DC motor which is
controlled by an Application Specific Integrated Circuit (ASIC) and
a microprocessor. The microprocessor provides the intelligence
to the ASIC to provide a constant rotation rate. The ASIC monitors and controls the brushless DC motor’s rotation and provides
a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in
its normal rotation without the need of mechanical end switches.
Power consumption is reduced in holding mode.
The LFC24-3-S US version is provided with 1 built-in auxiliary
switch. This SPDT switch is provided for safety interfacing or
signaling, for example, for fan start-up. The switching function
is adjustable between 0° and 95°. The auxiliary switch in the
LFC24-3-S US is double insulated so an electrical ground is
not necessary.
Dimensions
[All numbers in brackets are in millimeters.]
Technical Data LFC24-3-R US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 2.5 W ; holding: 1 W
Transformer sizing 5 VA (class 2 power source)
Electrical connection 3 ft, plenum rated cable
4 male spade connectors
Overload protection electronic throughout 0 to 95° rotation
Input impedance 1000 Ω(0.6w) control inputs
Angle of rotation max. 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm]
Direction of rotation spring: reversible with cw/ccw mounting
motor: reversible with built-in switch
Position indication visual indicator, 0° to 95° (0° is spring
return position)
Running time motor: 90 sec constant,
independent of load
spring: < 25 sec
@-4°F to +122°F [-20°C to +50°C]
< 60 sec
@-22°F [-30°C]
Humidity 5 to 95% RH non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing NEMA type 2 /IP54
Housing material zinc coated metal
Agency listings UL 873 listed; CSA C22.2 No.24 certified, CE
Noise level max: running < 30 db (A)
spring return 62 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight 3.1 lbs (1.40 kg)
Technical Data LFC24-3-S US
Auxiliary switch 1 x SPDT 3A (0.5A) @ 250 VAC,
UL listed
adjustable 0° to 95° (double insulated)
Electrical Connection 3 ft, 18 GA appliance cables (2)
1/2” conduit connector
Weight 3.6 lbs (1.45 kg)
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
®
72
D010
Standard:
3/8" to 1/2"
3/8" to 7/16"
Optional
1/2" to 3/4"
w/K6-1
accessory
3.86"
[98]
1.93"
[49]
7.67" [195]
0.39" [10]
4.92" [125]
6.10" [155]
0.256" [6.5]
3.66" [93]
0.98"
[25]
0.71" [18]
0.25" [6.3]
0.79"
[20]
0.5"
[12.7]
0.74" [18.7]
2.24"
[57]
3.15" [80]
3.23" [82]
73
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LF
LFC24-3-R (-S) US
On-off, Spring Return Fail-Safe, Reversible, Floating Point, 24V, Trane Voyager Retrofit
Accessories
AV 10-18 Shaft extension (K6-1 is required)
IND-LF Damper position indicator
K6-1 Universal clamp for up to 3/4” diameter shafts
KH-LF Crankarm for up to 1/2” round shaft
Tool-06 8mm and 10 mm wrench
ZG-LF2 Crankarm adaptor kit for LF
ZG-112 Mounting bracket for Honeywell Mod IV, M6415
type actuators, and new installations
ZG-LF112 Crankarm adaptor kit for Honeywell Mod IV,
M6415 type actuators, and new installations
ZG-LFC114 Used with LFC24-3-R US, mounting bracket kit for
Trane Voyager economizer actuator retrofit. Kit
includes mounting bracket and installation hardware.
ZS-100 Weather shield (metal)
ZS-150 Weather shield (polycarbonate)
ZS-260 Explosion-proof housing
Note: When using LFC24-3-R (-S) US actuators, only use
accessories listed on this page.
Note: For On-Off control wiring please see LF24-3 US
wiring diagram. “On-Off control of LF24-3 (-S) US” page 71.
Note: For Floating point control wiring, Triac source, sink
or wiring with separate power supplies please see page 71
for correct wiring.
For Actuator Wiring Information and Diagrams,
Please See Belimo Wiring Guide (pg 349).
LFC24-3-R (-S) US Typical Specification
Floating point, on-off spring return damper actuators shall be
direct coupled type which require no crankarm and linkage and be
capable of direct mounting to a shaft up to a 3/4” diameter and
center a 1/2” shaft. The actuators must be designed so that they
may be used for either clockwise or counterclockwise fail-safe
operation. Actuators shall have an external direction of rotation
switch to reverse control logic. Actuators shall use a brushless DC
motor and be protected from overload at all angles of rotation. If
required, 1 SPDT auxiliary switch shall be provided having the
capability of being adjustable. Actuators with auxiliary switch
must be constructed to meet the requirements for Double
Insulation so an electrical ground is not required to meet
agency listings. Run time shall be constant and independent of
torque. Actuators shall be UL listed and CSA certified, have a 5
year warranty, and be manufactured under ISO 9001
International Quality Control Standards. Actuators shall be as
manufactured by Belimo.
®
Line
Volts
The indication of direction
is valid for switch position CW.
Blk (1) Common
Red (2) +
Wht (3) +
Grn (4) +
24 VA C Transformer
LFC24-3-R US
LFC24-3-S US
CW CCW
b
CCW
CW
stop
a
(3) (4)
stop stop stop
Installation Side
Direction of Rotation Switch
xx
x
x
xx
x
x
x
x
x
x
x
x
x
x
xx
x
x
x
x
x
xx
x
x
x
x
x
x
xx
x
x
xx
x
CW
CCW
Switch
Positions
CCW
CW
a
b
Wiring Diagrams
Floating point control of LF24-3… US
Blk (1) Common
Red (2) +
Wht (3) +
Grn (4) +
LFC24-3-R US
CW CCW
Pink
Red
Blue
Yellow
Yellow
Pink
Female
Connector Type
Equipment
Wiring
Field installed
female connectors
(provided)
Pre-installed
male connectors
on actuators
Male
Pink
Pink
Pink Pink
Blue
Blue
7
LFC24-3-S US
6
S1
S2
S3
NC
NO
0° to 95°
Auxiliary switch of LFC24-3-S US
2
3
1
Provide overload
protection and
disconnect as required.
Actuators may be
connected in parallel.
Power consumption
must be observed.
No ground connection
is required.
For end position indication, interlock control, fan startup, etc., LFC24-3-S US
incorporates one built-in auxiliary switch: 1 x SPDT, 3A (0.5A) @250 VAC,
UL listed, adjustable 0° to 95°.
Meets UL and CSA requirements without the need of an electrical
ground connection.
6
7
Notes:
ZG-LFC114
Wiring LFC24-3-R US
Retrofit solution installation
W147W148
W149
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