Operation Manual

81/180
Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Heating circuits 23. August 2007
Using this limitation, a temperature range for the flow temperature setpoint can be
defined. If the flow temperature setpoint demanded by the heating circuit reaches the
relevant limit and the heat request increases or decreases, the flow temperature
setpoint will be maintained at the maximum or minimum limit.
0 10 20 30 40 50 60 70 80 90 100
TV
max
min
akt
°C
2358Z09
TVw
TVmin
TVmax
TVw Current flow temperature setpoint
TVmax Flow temperature setpoint maximum
Tvmin Flow temp setpoint minimum
Room influence
Line no. Operating line
HC1 HC2 HCP
750 1050 1350 Room influence
Types of compensation:
When a room temperature sensor is used, there is a choice of 3 different types of
compensation.
Setting Type of compensation
− − − % Pure weather compensation *
1…99 % Weather compensation with room
influence *
100 % Pure room compensation
* Outside sensor required.
The flow temperature is calculated via the heating curve, depending on the compsite
outside temperature.
This type of compensation calls for a correct adjustment of the heating curve since in
that case the control gives no consideration to the room temperature.
Deviations of the actual room temperature from the setpoint are acquired and taken into
account when controlling the temperature. Heat gains can thus be considered,
facilitating 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
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 %.
•
There should be no thermostatic radiator valves in the reference room (mounting
location of the room sensor). (if such valves are present, they must be set to their
fully open position).
Weather compensation
only
Weather compensation
with room influence