Installation Instructions

Document No. 129-417
Installation Instructions
April 1, 2020
Siemens Industry, Inc. Page 5 of 8
Figure 16.
6. Attach the clip.
7. Rotate the damper blade shaft to its 0 position.
8. Return the actuator to the damper shaft and tighten
the shaft adapter to the damper shaft.
Other settings
For adjustment of auxiliary switches and span/offset
options, see Technical Instructions (GBB/GIB16x 155-
176P25; GBB/GIB13x 155-177P25).
Wiring
• All wiring must conform to NEC and local codes and
regulations.
• Use earth ground isolating step-down Class 2
transformers. Do not use auto transformers.
• The maximum rating for a Class 2 step-down
transformer is 100 VA. Determine the supply
transformer rating by summing the total VA of all
actuators and components used. It is recommended
that no more than 10 actuators are powered by one
transformer.
WARNING:
Do not parallel wire GBB/GIB actuators with
any other type of actuator, including
GBB/GIB actuators with date codes earlier
than 501.
WARNING:
It is recommended to switch off the power
during two-position control when the
actuator has reached the open or closed
position to enhance life span and reduce
power consumption.
WARNING:
Mixed switch operation is not permitted to
the switching outputs of both auxiliary
switches (A and B).
− Either AC line voltage from the same
phase must be applied to all six outputs
of the dual auxiliary switches, or UL-
Class 2 voltage must be applied to all six
outputs.
NOTE: With plenum cables, only
UL-Class 2 voltage is permitted.
Figure 17.
GBB/GIB16x Modulating Control, 24 Vac.
Figure 18.
GBB/GIB13x Three-position Control, 24 Vac.