Building automation – impact on energy efficiency - Siemens ...

Remarks of Siemens
This section outlines how Siemens interprets the functions and processing functions
according to EN 15232:2012.
1. Plants required for "emission control" of thermal energy, such as fan coils,
chilled ceilings or VAV systems may have different supply media (e.g. water,
air). As a result, different BAC solutions may be possible for a processing
function.
2. The Siemens interpretation gives full consideration to the processing function
in the function list of EN 15232: It includes thermostatic valves and electronic
control equipment.
• Non-communicating electronic control equipment may include a local
scheduler. But experience suggests that they are often not correctly set.
• Thermostatic valves are not used for "cooling control".
3. Communication between a superposed centralized unit and electronic individual
room controllers allow for centralized schedulers, monitoring of individual
room controllers as well as centralized operation and monitoring.
4. Demand control (by use) = demand control based on occupancy information
from a presence detector or a presence button with automatic reset after a
set period. Control switches from Pre-Comfort to Comfort or the other way
around using this occupancy information (see EN 15500).
Notes:
• Air quality control is considered in "Ventilation and air conditioning control".
• Occupancy information can influence "heating control", "cooling control"
and "ventilation and air conditioning control".
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