Application

Room Functions
Room Coordination Functions for HVAC
49
Siemens Industry, Inc.
Application Note
A6V11692042
Smart Infrastructure – Building Products
2019-04-01
5. RadDevMod = 3:Full Open
These data points are then released from warm-up once room temperature returns
to the Comfort deadband (70°F to 75°F, default).
Rapid Ventilation
(Optional – requires additional configuration in ABT Site)
The fan speed button at the room operator unit allows the occupant to increase the
ventilation rate in the room when the room operating mode (ROpMod) is in
Comfort. A request is sent to the plant operating mode (PltOpMod) to start the
Rapid ventilation (RpdVnt) and improve the room air quality. Rapid ventilation
utilizes the maximum air volume flow setpoint value for ventilation
(VavSuAflMaxVnt).
The application templates have been configured with a 15 minute run-time for
rapid ventilation. This function can be configured to meet job site requirements.
The rapid ventilation option on the room unit is displayed and enabled as a Fan.
Pressing the button activates the Rapid Ventilation mode.
Configuration
Parameters
Description
Parameter
Pre-loaded Value
Rapid ventilation runtime
TiRnRpdVnt
15 [min]
See Room Operator Unit [➙ 35] to enable rapid ventilation (FanSpd1)
False
Frost Protection
Frost protection – VAV type
Plant mode 8 (Room low temperature protection) places VAV boxes in control
mode and heat sources at 100%, but it is not used by any AFs. If frost protection is
required, a CFC chart specific to the project must be created (with a room
temperature low and high limit) to command and release the device operating
modes.
Note
This feature does not rely on an outdoor air temperature signal. It uses temperature
sensing in the room.