Application

3
Siemens Industry, Inc.
BACnet LCM-OAVS, Application 6760
140-1326
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 ............................................................................. 19
Venturi Air Valve Calibration (Mode 1, 3) .......................................................................... 20
Table Access Feature (Mode 1, 3) .................................................................................... 20
Venturi Table Evaluation and Editing (Mode 1, 3) ............................................................. 22
PID Only (Mode 2) ............................................................................................................. 25
Open Loop (Mode 3) .......................................................................................................... 25
Operating Without a Supply or Exhaust ............................................................................ 27
Heating Safety ................................................................................................................... 28
Room Temperature and Setpoint ...................................................................................... 28
Room Temperature Offset ................................................................................................. 29
Room Unit Identification ..................................................................................................... 29
Room Unit Operation ......................................................................................................... 29
Sensor Select ..................................................................................................... 29
Room CO2.......................................................................................................... 30
Room RH ............................................................................................................ 31