General Information
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 mount-
ed outdoors, a protective enclosure must
be used to shield the actuator.
2.
For new construction work,
order dampers
with extended shafts
. Instruct the install-
ing contractor to allow space for mounting
the Belimo actuator on the shaft.
For replacement of existing gear train actua-
tors, 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)
10 VDC
2 VDC
10 VDC
2 VDC
Direction of Rotation Switch
Non-spring return actuators have a reversing
switch on the cover. Switch position indicates
start point. For the non-spring return, with the
switch in position 1, the actuator rotates clock-
wise with a decrease in voltage or current.
With the switch in position 0, the actuator
rotates counterclockwise with a decrease in
voltage or current.
The non-spring return rotates clockwise when the
switch is in the 1 position and power is applied to
wire #2. When power is applied to wire #3 the
actuator rotates counter clockwise.
Rotating the switch to 0 reverses the control logic.
During checkout, the switch position can be tem-
porarily reversed and the actuator will reverse its
direction. This allows the technician a fast and
easy way to check the actuator operation without
having to switch wires or change settings on the
thermostat.
When the check-out is complete,
make sure the switch is placed back to its
original position.
The …-S model actuators are equipped with an
adjustable auxiliary switch used to indicate damp-
er position or to interface additional controls or
equipment. Switching positions can be set over
the full 0 to 95° rotation simply by setting
a switch on the actuator.
Auxiliary Switches
S2 S3
S1
S2 S3
S1
Switch Rating
Voltage 250
VAC
Resistive load
3 A
Inductive load
0.5 A
Please refer to the appropriate product liter-
ature for detailed installation information.
Reference
• Mounting Methods Guide
• Wiring Guide
• Damper Application Guide
Mounting Installation Instructions
LM, NM, AM, GM
®
70569-00001 Re
v E
