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LMQ
LMQB24-MFT, LMQX24-MFT
Quick Proportional Control, Non-Spring Return,
Direct Coupled, 24V, Multi-Function Technology®
Application
For proportional modulation 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 ½” up to 1.05” in
diameter by means of its universal clamp.
The default parameters for 2 to 10 VDC applications of the …MFT
actuator are assigned during manufacturing. If necessary, custom
versions of the actuators can be ordered. The parameters can be changed
by two means: pre-set and custom configurations from Belimo or on-site
configurations using the Belimo PC-Tool software. (version 3.3 or later)
Operation
The actuator is not provided with and does not require any limit switches,
but is electronically protected against overload. The anti-rotation strap
supplied with the actuator will prevent lateral movement.
The LMQB(X) series provides 95° of rotation and a visual indicator
indicates position of the actuator. When reaching the damper or actuator
end position, the actuator automatically stops. The gears can be manually
disengaged with a button on the actuator cover.
The LMQB(X)24-MFT actuators use a Brushless DC motor, which is
controlled by an Application Specific Integrated Circuit (ASIC). The ASIC
monitors and controls the actuator’s rotation and provides a digital
rotation sensing (DRS) function to prevent damage to the actuator in a
stall condition. Power consumption is reduced in holding mode.
Add-on auxiliary switches or feedback potentiometers are easily fastened
directly onto the actuator body for signaling and switching functions.
Dimensions (All numbers in brackets are in millimeters.)
2.95” [75]
1.97” [50]
4.88” [124]
3.15” [80]
4.76” [121] 1.61” [41]0.98” [25]
Technical Data LMQB24-MFT LMQX24-MFT
Power Supply 24 VAC ±20% 50/60 Hz
24 VDC ±10%
Power Consumption 12 W (1.5 W)
Transformer Sizing
Electrical Connection 3 ft plenum rated
Overload Protection electronic throughout 0 to 95° rotation
Operating Range Y 2 to 10 VDC, 4 to 20 mA (default)
Input Impedance
Feedback Output U 2 to 10 VDC, 0.5mA max, VDC Variable
Angle of Rotation max. 95°, adjust. with mechanical stop
Torque 35 in-lb [4 Nm]
Direction of Rotation reversible with switch
Position Indication reflective visual indicator (snap-on)
Manual Override external push button
Running Time 2.5 seconds 2.5, 5 or 10 seconds
Humidity 5 to 95% RH non-condensing (EN 60730-1)
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 2/IP54
Housing Material UL94-5VA
Agency Listings UL 60730-1 A/-2-14, CAN/CSA
Noise Level <52 dB(A)
Servicing maintenance free
Quality Standard ISO 9001
Weight 1.8 lbs [0.85 kg]
Rated Impulse Voltage 800V, Type of action 1, Control Pollution Degree 3.
Torque min. 35 in-lb for control of damper surfaces up to 11 sq ft.
1
18 VA (Class 2 power source) (Imax 20A@5ms)
cable
Variable (VDC, On/Off)
100 kΩ (0.1 mA), 500 Ω,
1500 Ω (On/Off)
electronically variable
E60730-1:02, CSA C22.2 No. 24-93, CE
according to 2004/108/EC and 89/336/EEC
X24-MFT
3, 10 or 16 ft plenum
rated cable
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Accessories
K-NA Reversible Clamp
AV8-25 Universal Shaft Extension
ZG-NMA Shaft Adaptor
ZG-LMSA-1
Shaft Adaptor for ³⁄₈” Diameter Shafts
ZS-100 Weather Shield - Steel
ZS-150 Weather Shield - Polycarbonate
Tool-06 8 mm & 10 mm Wrench
S1A, S2A Auxiliary Switch (es)
P370 Shaft Mount Auxiliary Switch
P…A Feedback Potentiometers
SGA24 Min positioners in NEMA 4 housing
SGF24 Min positioners for flush panel mounting
ADS-100 Analog to Digital Switch
ZG-R01 Resistor for 4 to 20 mA Conversion
NSV24 US Battery Back-Up Module
ZG-X40 Transformer
NOTE: When using LMQB(X)24-MFT actuators, only use
accessories listed on this page.
LMB(X)24-MFT Typical Specification
Proportional control damper actuators shall be electronic direct-coupled
type, which require no crankarm and linkage and be capable of direct
mounting to a shaft from ¼” to ⁵⁄₈”. Actuators must provide control in
response to a control input from an electronic controller or positioner.
Actuators shall have Brushless DC motor technology and be protected
from overload at all angles of rotation. Actuators shall have reversing
switch and manual override on the cover. Run time shall be constant and
independent of torque. Actuators shall be cULus listed, have a 5-year
warranty, and be manufactured under ISO 9001 International Quality
Control Standards. Actuators shall be as manufactured by Belimo.
Wiring Diagrams
PWM
24 VAC Transformer (AC only)
1
Line
Volts
2
On/Off
1
3
Position
Feedback VDC
24 VAC/DC Transformer
Line
Volts
Position
Feedback VDC
VDC/4-20 mA
24 VAC Transformer
1
4
2
a
1 Blk Common
2 Red + Hot
3 Wht Y Input
5 Org U Output
…MFT
1 Blk Common
2 Red Hot
3 Wht Y Input
5 Org U Output
…MFT
3
4 to 20 mA or 2 to 10 VDC
1
2
3
4
Line
Volts
Control Signal
Provide overload protection and disconnect as required.
Actuators may be connected in parallel if not mechanically
mounted to the same shaft. Power consumption and input
impedance must be observed.
Actuators may also be powered by 24 VDC.
Control signal may be pulsed from either the Hot (Source) or
Common (Sink) 24 VAC line.
Ω
5
500 Ω
¼ watt
2
1 Blk Common
2 Red + Hot
3 Wht Y1 Input,
2 to 10V
5 Org U Output,
2 to 10V
…MFT
5
ZG-R01 may be used.
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Installation and Operation
For Non-Spring Return Actuators
Preliminary Steps
1. Belimo actuators with NEMA 1 or NEMA 2 ratings should be mounted
indoors in a dry, relatively clean environment free from corrosive fumes.
If the actuator is mounted outdoors, a protective enclosure must be
used to shield the actuator.
2. For new construction work, order dampers with extended shafts.
Instruct the installing contractor to allow space for mounting the Belimo
actuator on the shaft.
For replacement of existing gear train actuators, there are
two options:
A. From a performance standpoint, it is best to mount the actuator directly
onto the damper shaft.
B. If the damper shaft is not accessible, mount the non-spring return
actuator with a ZG-NMA or ZG-GMA crankarm kit, and a mounting
bracket (ZG-100, ZG-101, ZG-103, ZG-104).
Determining Torque Loading and Actuator Sizing
Damper torque loadings, used in selecting the correct size actuator,
should be provided by the damper manufacturer. If this information is not
available, the following general selection guidelines can be used.
Damper Type Torque Loading
Opposed blade, without edge seals, for nontight close-off applications
Parallel blade, without edge seals, for non-tight
close-off applications
Opposed blade, with edge seals, for tight closeoff applications
Parallel blade, with edge seals, for tight closeoff applications
The above torque loadings will work for most applications under 2” w.g.
static pressure or 1000 FPM face velocity. For applications between this
criteria and 3” w.g. or 2500 FPM, the torque loading should be increased
by a multiplier of 1.5. If the application calls for higher criteria up to 4”
w.g. or 3000 FPM, use a multiplier of 2.0.
Torque Loading Chart
3 in-lb/sq. ft.
4 in-lb/sq. ft.
5 in-lb/sq. ft.
7 in-lb/sq. ft.
140
120
100
80
60
40
Damper Area (sq. ft.)
20
10
2 3 4 5 6 7 8 9 10
Torque Loading (in-lb/sq. ft.)
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Quick-Mount Visual Instructions for Mechanical Installation
65°
1 2
1
2
3 4
1
1
2
5
1
2
See next page for standard mounting instructions.
* LMQB, NMQB and AMQB clamps have an insert that self-centers on
** Shorter with reversible clamp for AM
5°
A* BC** D
LMQB ½” to 1.05”
NMQB ½” to 1.05”
AMQB ½” to 1.05”
the following diameter shafts:
½” (default), ¾” and 1.05”.
⁷⁄₁₆” to ¹¹⁄₁₆”
³⁄₈” to ¹¹⁄₁₆”
³⁄₈” to ¹¹⁄₁₆”
D
1
1½” 6 to 7 ft-lb
1½” 6 to 7 ft-lb
1½” 6 to 7 ft-lb
2
10
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Reversible Clamp Quick Mount (LMQB, NMQB, and AMQB)
Standard Mounting
1. Turn the damper shaft until the blades are fully closed.
2. Slip the actuator’s universal clamp over the damper shaft. Make sure
that the duct and the controls on the cover are accessible. Place the
actuator in the desired mounting position.
Hand tighten the two nuts on the actuators universal clamp.
3. Disengage the actuator gear train by pressing the manual override
button and rotate the clamp until centered.
Slide the anti-rotation strap up under the actuator so it engages the
actuator at the center cutout. Bend the bracket as needed to support
the rear of the actuator. Secure to ductwork with self-tapping screws
(No. 8 recommended).
4.
Loosen the nuts on the universal clamp. Press the manual override
button and rotate the clamp to about 5° from the closed position
(¹⁄₁₆” to ¹⁄₈” between stop and clamp).
Tighten the two nuts on the universal clamp with a 10 mm wrench
(see table for required torque).
5.
Snap on the reflective position indicator.
Adjust end-stops, if required
6. Mount actuators indoors. If mounted outdoors, use approved protective
enclosure.
The damper is now fully closed but the actuator is 5° from fully closed.
This is called “pre-loading” the actuator. When the actuator is powered
and sent to the closed position: it will put its full torque on the shaft
compressing the edge and blade seals. This ensures that the damper
will meet its leakage rating. The actuator is electronically protected from
overload and will not be damaged.
Testing the Installation Without Power
Disengage the gear train with the manual override button and move the
1.
shaft from closed to open to closed. Ensure that there is no binding and
that the damper goes fully open and closes with 5° of actuator stroke left.
2. Correct any problems and retest.
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