Type Of Optimization; Optimum Start And Stop Control - Siemens Synco 700 Basic Documentation

Caution
Room model
Settings
Optimum start control
With room model
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Building Technologies
HVAC Products
9.7.1

Type of optimization

The type of optimization determines whether the optimization functions and boost
heating are performed based on the acquired room temperature or whether the room
model is used.
In plants where the heating circuit operates in connection with a ventilation system as a
room control combination, the room temperature sensor used for the ventilation plant
must not be located in the extract air!
The room model calculates the room temperature based on the outside temperature,
the building time constant and the rate of room temperature increase.
If no room temperature sensor is connected, the optimization functions can work with
this room model.
TR
Cmf
TRw
Economy
T Room model temperature
RM
TRw Room temperature setpoint
In the case of sudden positive changes of the room temperature setpoint, the room
model temperature will be updated with the rate of room temperature increase. In the
case of sudden negative changes, the room model temperature will approach the
composite outside temperature at a rate of 3 times the building time constant, whereby
the process is stopped as soon as the current room temperature setpoint is reached.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Heating circuit 1 (or 2 or 3 ) > Optimizations/influences
Operating line
Type of optimization
9.7.2

Optimum start and stop control

The purpose of optimum start control is to reach a temperature level 0.25 K below the
Comfort or Precomfort setpoint when occupancy according to the time program starts.
For that purpose, the heating circuit must be switched on at an earlier point in time. The
extent of forward shift depends primarily on the outside temperature.
If a room temperature sensor is installed, the controller also gives consideration to the
room temperature when calculating the forward shift. Also, the controller learns the
necessary heating up time per K room temperature.
When the required room temperature is reached, the time difference to the target time
will be ascertained. Based on the deviation, the controller can readjust the heating up
time per K room temperature and calculate the next forward shift with the new value.
If no room temperature sensor is connected, or when the room model shall be used, the
rate of room temperature increase (in min/K) can be set.
Modular Heating Controller RMH760B
9 Heating circuit control
TRM
Range
With room model /
With room temp sensor
t
Factory setting
With room model
CE1P3133en
05.02.2007