Operating Instructions
Table Of Contents
- Table of Contents
- How To Use This Manual
- Chapter 1—Hardware
- Chapter 2—Applications for ATEC— Base VAV
- Chapter 3—Applications for ATEC—VAV with Reheat
- Chapter Overview
- Introduction
- Application 2500: VAV Cooling Only
- Application 2501: VAV Cooling or Heating
- Application 2522: VAV with Electric Reheat or Baseboard Radiation
- Application 2523: VAV with Hot Water Reheat (only one reheat valve)
- Application 2524: VAV Series Fan Powered with One Stage of Electric Reheat
- Application 2526: VAV Parallel Fan Powered with One Stage of Electric Reheat
- Application 2473: Slave Mode
- Chapter 4—Point Database
- Chapter 5—Troubleshooting
- Glossary
- Index
Chapter 1—Hardware
1-8 Siemens Building Technologies, Inc.
Relay Module
WARNING:
The relay module is a high voltage device.
A Terminal Equipment Controller relay module (Figure 1-6) is used in conjunction with the
controller when the following situations are present:
• ATEC digital output (DO) is used to drive electric heating coils.
• Controlled load is greater than 12 VA.
• Controlled load is greater than 24 Vac.
• Controlled load is DC.
• Controlled load is powered by a transformer other than the one powering the ATEC.
• Controlled load is suspected of creating electromagnetic interference or noise in the
control signal.
Figure 1-6. Terminal Equipment Controller Relay Module (540-147) in Enclosure.
For more information about controller components and accessories, consult the Specification
Data for APOGEE™ Automation Products (144-130) or contact your local Siemens Building
Technologies representative.