Product Overview

GBB/GIB Series NSR Rotary 24 Vac - Modulating Control Technical Instructions
Document Number 155-176P25
December 15, 2004
Service
WARNING:
Do not open the actuator.
If the actuator is inoperative, replace the unit.
WARNING:
To avoid injury or loss of life, pay attention to any hazardous voltage (for example, 120 Vac)
when performing checks.
Troubleshooting
• Check that the wires are connected correctly.
• Check that offset (start point) and span are set correctly, if used.
• Check that the direction of rotation switch matches the rotation of the damper shaft.
• Connect wires 1 (red) and 2 (black) to a Digital Multimeter (DMM) with the dial set at Vac
to verify that the operating voltage is within range.
• If the actuator is not working, check the damper for blockage. If blocked, remove the
obstacle and cycle the actuator power off and on. The actuator should resume normal
operating mode.
Dimensions
4-3/16
(106)
15-3/8
(390)
4-1/16
(103)
1-3/8
(35)
8-1/4
(210)
∅
1.04
(26.5)
OPENING FOR
STANDARD 1/2"
CONDUIT
CONNECTOR (2)
EA0846R1
Figure 27. Dimensions of the ASK75.1U Weather Shield in Inches (Millimeters).
Siemens Building Technologies, Inc. Page 15