User Manual
Table Of Contents
- 1 Purpose of this document
- 2 Why is a healthy, productive indoor climate so valuable?
- 3 The role of building automation in health and productivity
- 4 Control applications and targets (CO2, VOC, RH, PM2.5)
- 5 Recommendations for specific building types
- 6 Monitoring indoor climate parameters for health and productivity
- 7 Controlling indoor climate parameters for health and productivity
- 8 Products for a healthy productive indoor climate
- Appendix 1: Indoor air quality (IAQ) – Combined CO2 and VOC sensors
- Appendix 2: Integration of RDF../RDG.. (KNX) in Desigo
- Appendix 3: Other indoor climate parameters – NO2, SO2, O3
- Appendix 4: Tender texts
- External references
- Siemens reference documents
- Glossary
Page 28 Unrestricted 0 – Siemens Smart infrastructure
Determine the operating mode
Local
Presence detector: A presence detector must influence the operating mode of the room
temperature controller during occupancy. During this period, the operating mode must
change to “Occupy” in the room when occupied and control for occupancy as per the
temperature setpoint. If no one is in the room, the presence detector must switch to the
operating mode for unoccupied with room temperature control for this state. If the building
is unoccupied, the presence detector is used as an alarm.
Combined central and local
Room occupancy time schedule and presence detector: The room occupancy state is
determined by a time schedule. The scheduler must be used on the automation or
management level and specifies the operating mode. The room temperature must be
controlled to the setpoint defined for these states. A presence detector must determine the
operating mode of the room temperature control during occupancy. During this period, the
operating mode must change to “Occupy” in the room when occupied and control for
occupancy as per the temperature setpoint. If no one is in the room, the presence detector
must switch to the operating mode for non-occupancy with room temperature control as per
this state. “Occupied” is normally a higher priority than “Non-occupied”. If the scheduler or
presence detector reports occupancy, the room is occupied, and must be controlled to the
occupancy temperature setpoint.
Room equipment
Room operating units
The unit must be capable of measuring the room temperature and provide the user
with the following:
• Local operation to change the setpoint for room temperature and air quality (IAQ)
• Manual selection of room operating mode/occupancy
• Manual selection of fan speed
• LCD display for room/outside temperature, air quality, operating modes and fan speed
Air quality sensor (combined CO
2 and VOC)
This sensor should be a wall-mounted and measure CO
2 and VOC levels. Its output signal
should represent the higher of the two measurements.
Presence detector
This sensor should be ceiling-mounted and detect slight movements in the room, such as a
person typing on a keyboard.
Control sequences
Supply air volume control
The room must be heated or cooled via a single-duct supply and extract variable air volume
system. Room supply air cascade control must make it possible to reach the required room