Application

3
Siemens Industry, Inc.
Application Note, App 6750
140-1328
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
Venturi Air Valve Calibration (Mode 1, 3) .......................................................................... 15
Table Access Feature (Mode 1, 3) .................................................................................... 16
Venturi Table Evaluation and Editing (Mode 1, 3) ............................................................. 18
PID Only (Mode 2) ............................................................................................................. 22
Open Loop (Mode 3) .......................................................................................................... 22
Operating Without a Supply or Exhaust ............................................................................ 24
Airflow Control ................................................................................................................... 25
Heating Safety ................................................................................................................... 27
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
PPCL STATUS .................................................................................................................. 30
Temperature Control Loop ................................................................................................. 30