Application

3
Siemens Industry, Inc.
Application Note, App 2923
140-1347
2015-07-07
Table of Contents
Overview ............................................................................................................................. 5
Hardware Inputs .................................................................................................................. 6
Hardware Outputs ................................................................................................................ 7
Ordering Notes .................................................................................................................... 7
Sequence of Operation ..................................................................................................... 8
Pressurization Control ......................................................................................................... 8
Optional Rate Limiting of Actuators ..................................................................................... 8
Room Airflow Balance ....................................................................................................... 10
Occupancy ......................................................................................................................... 10
Active Flow Minimums and Maximums ............................................................................. 11
VAV versus CV Control ..................................................................................................... 12
Fume Hood Flow Input ...................................................................................................... 12
Flow Tracking – Supply Tracks Exhaust vs. Exhaust Tracks Supply ................................ 13
Calculating Exhaust Flow Setpoint .................................................................................... 14
Calculating Supply Flow Setpoint ...................................................................................... 15
External Flow Values ......................................................................................................... 15
Ventilation – VAV Mode ..................................................................................................... 16
Ventilation Setback in VAV Mode ...................................................................................... 16
Ventilation – Constant Volume Mode ................................................................................ 16
AVS Calibration ................................................................................................................. 17
Airflow Control ................................................................................................................... 17
Floating Control Actuation Auto-correct ............................................................................. 18
Operating Without a Supply or Exhaust ............................................................................ 18
Heating Safety ................................................................................................................... 18
Room Temperature and Setpoint ...................................................................................... 19
Room Temperature Offset ................................................................................................. 19
Room Unit Identification ..................................................................................................... 19
Room Unit Operation ......................................................................................................... 20
Sensor Select ..................................................................................................... 20
Room CO2.......................................................................................................... 21
Room RH ............................................................................................................ 21
Temperature Control Loop ................................................................................................. 21
Alarms ............................................................................................................................ 22
Ventilation Alarm ................................................................................................ 22
Pressurization Alarm .......................................................................................... 23
Local Annunciation ............................................................................................. 24
Network Annunciation ........................................................................................ 25
Damper Position on Return from Power Failure ................................................................ 25
Operation of AVS FAILMODE ........................................................................................... 26