Application

3
Siemens Industry, Inc.
Application Note, App 6751
140-1331
2015-07-07
Table of Contents
Overview ............................................................................................................................. 5
BACnet .............................................................................................................................. 6
Auto Discovery ..................................................................................................................... 7
Auto Addressing .................................................................................................................. 7
Hardware Inputs .................................................................................................................. 7
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 ..................................................................................................... 10
Fume Hood Flow Input ...................................................................................................... 11
Flow Tracking – Supply Tracks Exhaust vs. Exhaust Tracks Supply ................................ 11
Calculating Exhaust Flow Setpoint .................................................................................... 13
Calculating Supply Flow Setpoint ...................................................................................... 13
External Flow Values ......................................................................................................... 14
Ventilation – VAV Mode ..................................................................................................... 14
Ventilation Setback in VAV Mode ...................................................................................... 14
Ventilation – Constant Volume Mode ................................................................................ 15
AVS Calibration ................................................................................................................. 15
Airflow Control ................................................................................................................... 15
Floating Control Actuation Auto-correct ............................................................................. 16
Heating Safety ................................................................................................................... 16
Room Temperature and Setpoint ...................................................................................... 17
Room Temperature Offset ................................................................................................. 17
Room Unit Identification ..................................................................................................... 18
Room Unit Operation ......................................................................................................... 18
Sensor Select ..................................................................................................... 18
Room CO2.......................................................................................................... 19
Room RH ............................................................................................................ 19
PPCL STATUS .................................................................................................................. 19
Temperature Control Loop ................................................................................................. 19
Alarms ............................................................................................................................ 21
Ventilation Alarm ................................................................................................ 21
Pressurization Alarm .......................................................................................... 22
Local Annunciation ............................................................................................. 22
Network Annunciation ........................................................................................ 23