Belimo LMQB24-1 User manual

1
Technical Data LMQB24-1 LMQX24-1
Power Supply 24 VAC ±20% 50/60 Hz
24 VDC ±10%
Power Consumption 12 W (1.5 W)
Transformer Sizing
18 VA (Class 2 power source) (Imax 20A@5ms)
Electrical Connection 3 ft plenum rated
cable
3, 10 or 16 ft
plenum rated cable
Overload Protection electronic throughout 0 to 95° rotation
Control On/Off
Input Impedance 600 Ω
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
constant independent of load
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
E60730-1:02, CSA C22.2 No. 24-93, CE
according to 2004/108/EC and 89/336/EEC
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, (1.B for -S version), Control Pollution
Degree 3.
Application
For 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 ½” up to 1.05” in
diameter by means of its standard universal clamp.
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
which indicates position of the actuator. When reaching the damper or
actuator end position, the actuator automatically stops. The gears can be
disengaged with manual release on the actuator cover.
The LMQB(X)24-1 actuators use a sensorless 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.)
LMQB24-1, LMQX24-1
Quick On/Off Control, Non-Spring Return,
Direct Coupled, 24V
Torque min. 35 in-lb for control of damper surfaces up to 11 sq ft.
4
1
LMQX
24
1
1.97” [50]
4.88” [124]
4.76” [121] 1.61” [41]0.98” [25]
3.15” [80]
2.95” [75]

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Accessories
K-NA Reversible Clamp
ZG-101 Universal Mounting Bracket
ZG-104 Universal Mounting Bracket
ZG-NMA Crankarm Adapter Kit
AU8-25 Universal Shaft Extension
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
NOTE: When using LMQB(X)24-1 actuators, only use accessories
listed on this page.
LMQB(X)24-1 Typical Specification
On/Off 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 ½” to 1.05”. 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. Actuators with auxiliary switches 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 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
On/Off
24 VAC Transformer
Line
Volts
1 Blk Common –
2 Red +
3 Wht +
1
2
aopen
aclosed
a
The indication of direction is valid
for switch position 1.
1 0
1Provide overload protection and disconnect as required.
Actuators may also be powered by 24 VDC.
Meets cULus requirements without the need of an electrical
ground connection.
2
3
3

3
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 non-
tight close-off applications
3 in-lb/sq. ft.
Parallel blade, without edge seals, for non-tight
close-off applications
4 in-lb/sq. ft.
Opposed blade, with edge seals, for tight close-
off applications
5 in-lb/sq. ft.
Parallel blade, with edge seals, for tight close-
off applications
7 in-lb/sq. ft.
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
2 3 4 5 6 7 8 9 10
140
120
100
80
60
40
20
10
Torque Loading (in-lb/sq. ft.)
Damper Area (sq. ft.)

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Quick-Mount Visual Instructions for Mechanical Installation
See next page for standard mounting instructions.
A*BC** D
LMQB ½” to 1.05” ³⁄₈” to ¹¹⁄₁₆”1½” 6 to 7 ft-lb
NMQB ½” to 1.05” ³⁄₈” to ¹¹⁄₁₆”1½” 6 to 7 ft-lb
AMQB ½” to 1.05” ⁷⁄₁₆” to ¹¹⁄₁₆”1½” 6 to 7 ft-lb
* LMQB, NMQB and AMQB clamps have an insert that self-centers on
the following diameter shafts:
½” (default), ¾” and 1.05”.
** Shorter with reversible clamp for AM
2
1
1
65°
1
2
1
2
5°
10
D
2
1
1 2
3 4
5

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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
1.
Disengage the gear train with the manual override button and move the
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.