Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
3131D36
TRw
TRM
Economy
Cmf
TR
t
T
RM
Room model temperature
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
Range
Factory setting
Type of optimization With room model /
With room temp sensor
With room model
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.
The maximum forward shift can also be set. Optimum start control can be deactivated
by entering 0 hours as the maximum heating up period.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Optimizations/influences
Operating line
Range
Factory setting
Forward shift on max
0…48 h
6 h
Room temperature rise
1…600 min/K
60 min/K
Optimum stop control switches off the heating circuit at the earliest possible point in
time so that the room temperature will lie 0.5 K below the Comfort or Precomfort
setpoint when the time switch changes from Comfort or Precomfort mode to Economy
or Protection mode. If no room temperature sensor is available, the room model will be
used.
Settings
Optimum start control
With room model
Settings
Optimum stop control