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
Application 2526: VAV Parallel Fan Powered with One Stage of Electric Reheat
Siemens Building Technologies, Inc. 3-67
Application 2526: VAV Parallel Fan Powered with One
Stage of Electric Reheat
Overview
In Application 2526, the controller modulates the supply air damper of the terminal box for
cooling and controls one stage of electric reheat for heating. When in heating, the terminal
box either maintains minimum airflow or modulates the supply air damper. The terminal box
also has a parallel fan that recirculates the room air. In order for the terminal box to work
properly, the central air-handling unit must provide supply air. See Figure 3-20 through Figure
3-22.
Stage 1 Heat
Fan
Spare AI/DI
Wall Switch (Opt.)
DO3
DO4
AI3
AI4
NO
9
0
9
0
4
5
HI/LO Tubing
Connections
ATEC
24VAC
FLN
RTS
TEC2526CDR2
RECIRCULATED
PLENUM AIR
SUPPLY
AIR
SUPPLY AIR
DAMPER
1 STAGE
ELECTRIC
REHEAT
* 1
AIR VELOCITY
SENSOR
FAN
BACK DRAFT
DAMPER
SAFETIES
BY
OTHERS
1. Heat must be on the outlet.
Figure 3-20. Application 2526 Control Drawing.