Siemens AVS75.39 Series User Manual page 100

Frost protection
Electronic TC
TC function
100 / 239
Siemens
Building Technologies
Line number Operating line
2300 Plant protection boiler pump
The boiler pump switches on based on the current outside temperature even
though there is no heat request.
Boiler frost protection only works if plant frost protection on line 6120 is switched
on.
Outside temperature
...-4°C
-5...1.5°C
1.5°C...
ON
-6 -5 -4 -3
Line number Operating line
2310 Limit thermostat function
The electronic temperature controller monitors boiler temperature (TKx) and
triggers when the set limit value (TC setpoint) is exceeded, resulting in the
shutdown of the burner.
During normal control operation and relay test, the Boiler temperature maximum
limitation (TKMax) is used as the TR setpoint, whereas during manual operation, it
switched to the "adjustable" value TKMaxHand.
The temperature controller can be switched on and off using the TC function
parameter. It is, however, always active during manual operation.
C°
aktiv
TR
inaktiv
TCw Setpoint for "electronic TC"
User manual RVS43.345
The settings in detail
Pump
Continuously ON
ca. every 6 hours, ON for 10 minutes
Continuous OFF
takt
-2 -1 0 1
SDK/2
Graphic
ON
Cycle
OFF
OFF
2 3 4
TA °C
TRw
t
CE1U2354en_021
2013-09-02