Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Heating circuits 23. August 2007
• The function is not active in operating mode ”Continuously Comfort temperature“
•
The display shows ECO
•
To incorporate the building's thermal dynamics, the outside temperature is attenuated
Example:
SWHG Summer/winter heating limit
TAged The attenuated outside temperature
T Temperature
t Days
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
spring and autumn to respond to short-term temperature variations.
Example:
Setting line e.g.
Comfort setpoint (TRw) 22°C
24-hour heating limit (THG) -3°C
Changeover temperature (TRw-THG) heating off = 19°C
Switching differential (fixed) -1°C
Changeover temperature heating on = 18°C
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 Comfort temperature“
•
The display shows ECO
•
To give consideration to the building’s thermal dynamics, the outside temperature will
be attenuated
Flow temperature setpoint limits
Line no. Operating line
HC1 HC2 HCP
740 1040 1340 Flow temp setpoint min
741 1041 1341 Flow temp setpoint max
24-hour heating limit
ON
17
T
SWHG
TAged
°C
OFF
t
2358Z08
SWHG
+1 °C
SWHG
-1 °C
16
18
19
20
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