Application

3
Siemens Industry, Inc.
Application Note, Application 6759
140-1335
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
Optional Rate Limiting of Actuators ..................................................................................... 8
Room Airflow Balance ......................................................................................................... 9
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 ................................................................................................................. 16
Airflow Control ................................................................................................................... 17
Floating Control Actuation Auto-correct ............................................................................. 17
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
PPCL STATUS .................................................................................................................. 21
Temperature Control Loops ............................................................................................... 21
BTU Calculations ............................................................................................................... 21
BTU Calculations – VAV Mode .......................................................................... 22
BTU Calculations – Constant Volume Mode ...................................................... 23