User Manual

71
AUTOMATIC CONTROL
7 TECHNICAL HOME AND BUILDING
MANAGEMENT
BT Reason for energy savings
The Technical Home and Building Management
enables to adapt easily the operation to the user
needs.
One shall check at regular intervals that the
operation schedules of heating, cooling, ventilation
and lighting is well adapted to the actual used
schedules and that the set points are also adapted
to the needs.
- Attention shall be paid to the tuning of all
controllers this includes set points as well as
control parameters such as PI controller
coefficients.
- Heating and cooling set points of the room
controllers shall be checked at regular intervals.
The users often modify these set points. A
centralized system enables to detect and
correct extreme values of set points due to
misunderstanding of users.
- If the Interlock between heating and cooling
control of emission and/or distribution is only a
partial interlock. The set point shall be regularly
modified to minimize the simultaneous use of
heating and cooling.
- Alarming and monitoring functions will support
the adaptation of the operation to user needs
and the optimization of the tuning of the
different controllers. This will be achieved by
providing easy tools to detect abnormal
operation (alarming functions) and by providing
easy way to log and plot information (monitoring
functions).
7.1 Setpoint management
Management, set back and adaptation of BAC
setpoints according to the room/zone operating
modes
This part is about management of setpoints. The
better they can be controlled, reset … and the
more this can be done from a central location,
the better.
0
Manual setting room by room individually
In order to set/reset the setpoints an operator
would have to do this room by room. Since this
is rather cumbersome, most often it will not be
done. This then leads to unnecessary high
energy consumption due to inappropriate
setpoint settings that remain for a long time.
1
Adaptation from distributed/decentralized plant
rooms only
The setpoints can be adjusted from a plant room
that is located away from the supplied rooms. In
order to set/reset the setpoints an operator
would have to go to the respective plant room,
which is still cumbersome and therefore quite
often will not be done as required. This then
leads to unnecessary high energy consumption
due to inappropriate setpoint settings that
remain for a certain time.
2
Adaptation from a central room
(e.g. work station, web operation; room operating
units are excluded)
Here setpoints can be adjusted from a central
location that is close(r) to the various rooms (e.g.
one possibility on each floor …). For this it is
required that the local setpoint adjustments are
not with fixed hardware positions.
With that it is more likely that setpoints will get
adjusted/reset, which reduces the energy
consumption somewhat.
3
Adaptation from a central room
(e.g. work station, web operation; room operating
units are excluded) with frequent set back of user
inputs
As in 2) but with automated resetting (e.g. daily,
at lunch, at the end of the working day …) of
user adjusted setpoints to specified values. This
ensures frequent operation at specified setpoints
which in turn reduces the energy consumption.