User Manual

Control concept
Desigo room automation
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The BACnet objects in the system support 16 priority levels. The HVAC control
applications apply these levels as follows:
Priority Purpose assigned to the level Use in HVAC library
Emergency mode 1 Manual commands related personal safety None
Emergency mode 2 Automatic commands related to personal safety Propagated response to Emergency
mode commands
Emergency mode 3 Unassigned - additional level for commands related to
personal safety
None
Protection mode 4 Manual commands to avoid damage to equipment None
Protection mode 5 Automatic commands to avoid damage to equipment Programmed response to equipment
safety conditions
Minimum On/Off 6 Commands to avoid damage by short cycling equipment None
Manual operating 7 Manual commands through switches on equipment None
Manual operating 8 Manual commands through BAS workstation None
Automatic control 9 Unassigned - commands for comfort and energy
conservation
None
Automatic control 10 Unassigned - commands for comfort and energy
conservation
None
Automatic control 11 Unassigned - commands for comfort and energy
conservation
None
Automatic control 12 Unassigned - commands for comfort and energy
conservation
None
Manual operating 13 Manual commands through room unit Programmed response to inputs from
occupants
Automatic control 14 Unassigned - commands for comfort and energy
conservation
None
Automatic control 15 Typical automatic commands for comfort and energy
conservation
Typical automatic commands
Automatic control 16 Unassigned - commands for comfort and energy
conservation
None
An HVAC control application comprises several different members of an HVAC
room family. It contains application-specific components (CFC) matching
existing HVAC devices in the room. Components no longer matching existing
HVAC devices in the room are either added, removed, or replaced to control a
slightly different HVAC plant with different HVAC devices.
TR
RoomRoom HVAC Plant
TEx
TSu
HclHw01
HclEl01
HclHw02
CclChw01
CclChw02Fan1Spd01
FanMulti01
FanVarSpd01
TOa
DmpOa01
Adaptation to another
HVAC plant