SIEMENS GND121 GND Series Electronic Damper Actuator Instruction Manual
- June 9, 2024
- SIEMENS
Table of Contents
SIEMENS GND121 GND Series Electronic Damper Actuator
DESCRIPTION
- a. Actuator
- b. Hex key – 3mm
- c. Eyelet and 1/4-inch hex head screw
Product Description
Step-by-step description for direct-coupled mounting of the OpenAir GND fast- acting two-position rotary electronic damper actuator. Actuator is intended for control of approved fire and smoke leakage-rated HVAC dampers.
Product Numbers
- GND12x.1x
- GND22x.1x
- GND32x.1x
Warning/Caution Notations
WARNING:| **| Personal injury or loss of life may occur if you do not
follow a procedure as specified.
---|---|---
CAUTION:| **| Equipment damage or loss of data may occur if you do
not follow a procedure as specified.
Required Tools
- 3 mm hex wrench (provided)
- No. 2 Phillips screwdriver
- 1/4-inch (6.4 mm) hex driver
- Marker or pencil
Installation
CAUTION: Apply 60 in-lb to 90 in-lb (7 Nm to10 Nm) maximum torque to the shaft fixation set screws. All four screws must be tightened.
- Insert the eyelet through housing ear.
- Insert screw through eyelet and tighten using 1/4-inch (32 mm) hex driver.
CAUTION: Always turn key in direction of the arrow.
Wiring Diagrams
NOTE: All wiring must conform to NEC and local codes and regulations.
| Function | Color |
|---|---|
| Supply | Red |
| Neutral | Black |
| Ground | Green |
| Function | Color |
|---|---|
| Line | Black |
| Neutral | White |
| Ground | Green |
| Function | Color |
|---|---|
| Line | Brown |
| Neutral | Blue |
| Ground | Green |
CAUTION:
The actuator must be wired with a 230 Vac line with respect to neutral. The ground lead must be connected for proper protection of the actuator. Any other connection, such as phase-to-phase, can damage the actuator.
| Switch | Wire Color | Switch Makes | Switch Breaks |
|---|---|---|---|
| 5° | Gray | < 5° | > 5° |
| 85° | Yellow | > 85° | < 85° |
NOTE: Both sets of contacts are open when actuator is between 5° and 85°.
CAUTION:
Mixed switch operation to the switching outputs of both dual end switches (5°
and 85°) is not permitted. Either AC line voltage from the same phase must be
applied to all four outputs of the fixed dual end switches, or UL-Class 2
voltage must be applied to all four outputs.
NOTE: The GND models pre-wired for assembly with the EFL (GNDxxx.1U/F) will only operate when an EFL, (ASK79.xxx) is attached.
Maintenance
CAUTION:
The GND actuator does not require any periodic cycling to function properly as
an integral part of an active smoke control damper system. The National Fire
Alarm Code NFPA 72 states that all life safety systems are to be functionally
checked at least annually. Check the smoke control damper/actuator every time
you functionally check your smoke detectors, emergency lights, and/or power
generators for operation.
Electronic Fusible Link (EFL)
Versions GNDxxx.1U/F contain wire with a Molex connector (See Figure 9) to
accommodate an EFL. EFLs are purchased separately. See Table 1.
| Part Number | Operation |
|---|---|
| ASK79.165 | 165°F (74°C) |
| ASK79.212 | 212°F (100°C) |
| ASK79.250 | 250°F (121°C) |
| ASK79.350 | 350°F (177°C) |
Dimensions
References
Technical Instructions
OpenAir Electric Damper Actuator Designed for UL Listed Fire/Smoke and Smoke
Control Dampers
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. OpenAir is a trademark of Siemens Schweiz AG. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2018 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089
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