Flow Temperature Setpoint Limitations - Siemens Albatros2 User Manual

24-hour heating limit
Flow temperature
setpoint limitations
Siemens Switzerland Ltd
HVAC Products
The 24-hour heating limit is used to switch the heating on and off in the course of the
day, depending on the outside temperature. This function is used primarily during
intermediate seasons (spring and autumn), enabling the system to respond to short-
time temperature variations.
Example:
Setting line
Comfort setpoint (TRw)
24-hour heating limit (THG)
Changeover temperature (TRw-THG) heating off
Switching differential (fixed)
Changeover temperature
By changing the value entered, the respective heating periods will be shortened or
extended.
Increase: Heating mode will start earlier,
changeover to ECO later.
Decrease: Heating mode will start later,
changeover to ECO earlier.
• The function is not active in operating mode "Continuously nominal temperature"
• The display will show ECO
• To give consideration to the building's thermal dynamics, the outside temperature will
be attenuated
Line no.
HC1 HC2 HC3P
740 1040 1340
741 1041 1341
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.
TV
max
akt
TVmin
min
0 10 20 30
TVw Current flow temperature setpoint
TVmax Flow temperature setpoint maximum
Tvmin Flow temp setpoint minimum
User manual RVS61.843
6 The settings in detail
heating on
Operating line
Flow temp setpoint min
Flow temp setpoint max
TVw
40 50 60 70
e.g.
22°C
-3°C
= 19°C
-1°C
= 18
°C
TVmax
°C
80 90 100
CE1U2355en_02
23. November 2007
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