Application

3
Siemens Industry, Inc.
Application Note, App 2920
140-1307
2015-07-07
Table of Contents
Overview ............................................................................................................................. 5
Hardware Inputs .................................................................................................................. 6
Hardware Outputs ................................................................................................................ 7
Ordering Notes .................................................................................................................... 7
Sequence of Operation ..................................................................................................... 8
Pressurization Control ......................................................................................................... 8
Room Airflow Balance ......................................................................................................... 8
Occupancy ........................................................................................................................... 9
Active Flow Minimums and Maximums ............................................................................. 10
VAV versus CV Control ..................................................................................................... 11
Fume Hood Flow Input ...................................................................................................... 11
Flow Tracking – Supply Tracks Exhaust vs. Exhaust Tracks Supply ................................ 12
Calculating Exhaust Flow Setpoint .................................................................................... 13
Calculating Supply Flow Setpoint ...................................................................................... 14
External Flow Values ......................................................................................................... 14
Ventilation – VAV Mode ..................................................................................................... 15
Ventilation Setback in VAV Mode ...................................................................................... 15
Ventilation – Constant Volume Mode ................................................................................ 15
AVS Calibration ................................................................................................................. 16
Venturi Air Valve Calibration (Mode 1, 3) .......................................................................... 16
Table Access Feature (Mode 1, 3) .................................................................................... 17
Venturi Table Evaluation and Editing (Mode 1, 3) ............................................................. 19
PID Only (Mode 2) ............................................................................................................. 23
Open Loop (Mode 3) .......................................................................................................... 23
Operating Without a Supply or Exhaust ............................................................................ 25
Airflow Control ................................................................................................................... 25
Room Temperature and Setpoint ...................................................................................... 28
Room Temperature Offset ................................................................................................. 28
Room Unit Identification ..................................................................................................... 28
Room Unit Operation ......................................................................................................... 29
Sensor Select ..................................................................................................... 29
Room CO2.......................................................................................................... 30
Room RH ............................................................................................................ 30
Temperature Control Loop ................................................................................................. 30
Alarms ............................................................................................................................ 31
Ventilation Alarm ................................................................................................ 31
Pressurization Alarm .......................................................................................... 32
Local Annunciation ............................................................................................. 33
Network Annunciation ........................................................................................ 34