CaptiveAire GM24US User Manual
G20492-IG-Subject to change. © Belimo Aircontrols (USA), Inc.
GM24 US
On-off, reversible, non-spring return, direct coupled, tri-state, 24 V
Torque min. 320 in-lb, for control of air dampers
Application
For modulating or on-off 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 of a fan motor contactor, or a manual switch. The
direction of rotation is reversible, for use with a floating point
type control. The actuator mounts directly to the damper
operating shaft with a universal V-bolt clamp assembly.
Operation
The anti-rotation strap supplied with the actuator will prevent lateral movement of the actuator. The angle of rotation is mechanically limited to 95°. When reaching the damper or actuator end
position, the motor stops automatically. The gears can be manually disengaged by simply pressing down the spring loaded button on the actuator cover. When this button is pressed down,
the damper blades can be adjusted by hand. The position of the
actuator is indicated by means of a scale reading 0 to 1.
The GM uses 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 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.
Dimensions
[All numbers in brackets are in millimeters.]
Technical Data GM24 US
Power supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption running: 3 W; holding: 1W
Transformer sizing 6 VA (class 2 power source)
Electrical connection 3 ft, 18 GA appliance cable
1/2” conduit connector
Overload protection Electronic throughout 0 to 95° rotation
Angle of rotation mechanically limited to 95°
Torqu e 320 in-lb [36 Nm]
starting in June 2002
Direction of rotation reversible with switch A/B
Position indication 0 to 1 and reversible indicator
Running time 135 sec. independent of load
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
Housing rating UL94V-0 (flammability rating)
Agency listings UL 873 listed, CSA C22.2 No.24 certified, CE
Noise level max. 45 dB (A)
Servicing maintenance free
Quality standard ISO 9001
Weight 4.0 lbs (1.8 kg.)
LISTED
94D5
TEMP. IND &
REG. EQUIP.
U
L
102
D006
©
®
15/32" to 3/4" [12 to 20]
3/8" to 5/8" [9.5 to 16]
2.12"
[54]
1.02" [26]
4.88"
[124]
1.18" [30]
8.43" [214]
9.49" [241]
3.15"
[80]
GM
103
G20492-Subject to change. © Belimo Aircontrols (USA), Inc.
GM24 US
On-off, reversible, non-spring return, direct coupled, tri-state, 24 V
®
Accessories
KH8 Universal crankarm
KG10 Ball joint
NSV24 Battery back-up module
P… Feedback potentiometer
SZS Mid-position switch
S1,S2 Auxiliary switch
Tool-06 8mm and 10 mm wrench
ZDB-GM Angle of rotation limiter (Series 2)
ZG-H2 Actuator operator handle
ZG-GM2 Crankarm adaptor kit
ZG-100 Universal mounting bracket
ZG-101 Universal mounting bracket
ZG-102 Multiple actuator mounting bracket
ZG-103 Universal mounting bracket
ZG-104 Universal mounting bracket
ZS-100 Weather shield (metal)
ZS-150 Weather shield (polycarbonate)
ZS-260 Explosion-proof housing
ZS-300 NEMA 4X housing
NOTE: When using GM24 US actuators, use only the
accessories listed on this page.
Wiring diagrams
GM24 US - Typical Specification:
Control damper actuators shall be electronic direct coupled
type which require no crankarm and linkage. Actuators shall
be UL listed and CSA certified, have a 2 year warranty, and
be manufactured under ISO 9001 International Quality Control
Standards. Actuators shall have reversing switch and manual
override on the cover. Actuators shall use a brushless DC
motor and be protected from overload at all angles of rotation.
Run time shall be constant and independent of torque.
Actuators shall be as manufactured by Belimo.
On-Off control of GM24 US
1
Provide overload protection and disconnect as
required.
Actuator may also be powered by 24 VDC.
Tri-State control of GM24 US
1
Provide overload protection and disconnect as
required.
Actuator may also be powered by 24 VDC.
2 2
1
2
24 V AC Transformer
a open
a closed
The indication of direction is valid for switch position A.
1 Common
2 +
3 +
A
B
GM24 US
Line
Volts
a
1
2
24 V AC Transformer
The indication of direction is valid for switch position A.
1 Common
2 +
3 +
A
B
GM24 US
Line
Volts
W070
W071
Multiple actuators mounted to shaft
Model Maximum quantity per shaft
GM24 US 2
GM24-SR US 2
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