Room Influence - Siemens LMS14 User Manual

Room influence

Compensation variants
Weather
compensation alone
Weather compensation
with room influence
Key
150/617
Building Technologies Division
6.5.12 Room influence
Line no.
HC1 HC2 HC3
750 1050 1350
When a room sensor is used, there is a choice of 3 different types of compensation:
Setting Type of compensation
   %
Weather compensation alone *
1...99% Weather compensation with room influence *
100% Room compensation alone
* Outside sensor required
The flow temperature is calculated via the heating curve, depending on the composite
outside temperature. This type of compensation calls for a correct adjustment of the
heating curve since the control system gives no consideration to the room temperature
in this case.
Deviations of the current room temperature from the setpoint are acquired and taken
into account when controlling the temperature. Heat gains can thus be considered,
allowing more accurate room temperature control. The authority of deviation is set as a
percentage figure. The better the reference room (correct room temperature, correct
mounting location, etc.) the higher the value can be set.
Example:
Approx. 60% Good reference room conditions
Approx. 20% Unfavorable reference room
Note!
To activate the function, following must be considered:

A room sensor must be connected

Room influence must be set to a value between 1% and 99%

No thermostatic radiator valves should be used in the reference room where the
room sensor is located (if installed, such valves must be fully opened and locked
in that position)
The impact of the selected room influence can be calculated as follows:
TRw = TR * room influence/10
Line no. Meaning
TR
Room deviation (room temperature setpoint – actual value of room
temperature)
TRw
Resulting room temperature setpoint readjustment
User Manual LMS14...
6 The settings in detail
Operating line
Room influence
CC1U7471en
07.05.2014