Application

3
Siemens Industry, Inc.
Application Note
A6V11692042
Smart Infrastructure – Building Products
2019-04-01
Table of Contents
Application Notes .............................................................................................................. 5
Dual Duct Sequence Configurations ................................................................................... 8
Use case 1: VAV DD - Ventilation source in one duct ....................................... 10
Use case 2: VAV DD - Ventilation in both ducts, with mixing control................. 11
Use case 3: VAV DD - Ventilation in both ducts, snap acting control ................ 15
Use Case 4: VAV DD - Dedicated duct for ventilation from DOAS (dedicated outside
air system)........................................................................................... 19
Use Case 5: Constant volume DD option with ventilation in both ducts, with mixing
control ................................................................................................. 20
Sequence of Operation – Summary .................................................................................. 25
Room Automation Overview........................................................................................... 29
Operating Modes ............................................................................................................... 30
Room Functions .............................................................................................................. 31
Room Operating Mode Determination ............................................................................... 31
Configuration ...................................................................................................... 33
Room Operator Unit ........................................................................................................... 35
Room GreenLeaf ............................................................................................................... 39
Configuration ...................................................................................................... 40
Room Coordination Functions for HVAC ........................................................................... 40
Plant Operating Mode for VAV ........................................................................... 40
HVAC GreenLeaf ............................................................................................... 42
Room Temperature Setpoint Determination ...................................................... 44
Heating/Cooling State Determination ................................................................. 45
VAV Ventilation Control ...................................................................................... 46
Air Volume Flow Tracking .................................................................................. 47
VAV Room Temperature Control for Cooling ..................................................... 47
VAV Room Temperature Control for Heating ..................................................... 47
Rapid Ventilation ................................................................................................ 49
Frost Protection .................................................................................................. 49
Coordinating Signals between Room and Room Segment ......................................... 50
Room Segment Functions .............................................................................................. 51
Device Mode Determination .............................................................................................. 51
Dual Duct VAV Supply Air Damper Device Mode ............................................. 51
Heating Coil Device Mode .................................................................................. 52
Device Control Functions HVAC........................................................................................ 52
Dual Duct VAV Supply Air Dampers with 2-inlet pressure sensors ................... 52
Hot Water Coil with Supply Air Temperature Control (HclHw12) ....................... 61
Interlocks ............................................................................................................ 62
Supply Chains for Primary Plants / Room .................................................................... 64