Operation Manual
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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products QAA75.. / QAA78… / AVS37.. 23. August 2007
Operating line
User level
Function
Default value
Min
Max
Unit
Solid fuel boiler
4102 F Locking other heat sources
Off ¦ On
On
4110 F Setpoint min 40 8 120 °C
4130 F Temperature differential ON 8 1 40 °C
4131 F Temp diff off 4 0 40 °C
4133 F Comparative temp
DHW sensor B3 ¦ DHW sensor B31 ¦ Buff st tank sensor
B4 ¦ Buff st tank sensor B41 ¦ Flow temp setpoint ¦
Setpoint min
Setpoint min
Buffer storage tank
4720 F Auto generation lock
None ¦ With B4 ¦ With B4 and B42/B41
With B4
-
4722 F Temp diff buffer/HC -5 -20 20 °C
4723
4)
F
Temp diff buffer/CC
0 -20 20 °C
4724 F Min st tank temp heat mode − − − − − − / 8 95 °C
4726
4)
F
Max storage temp. cooling mode
25 − − − / 10 40 °C
4739
4)
F
Stratification prot
Off ¦ Always ¦ With solid fuel boiler
Off
4750 F Charging temp max 80 8 95 °C
4755 F
Recooling temp
60 8 95 °C
4756 F Recooling DHW/HCs
Off ¦ On
Off
4757 F Recooling collector
Off ¦ Summer ¦ Always
Off
4783 F With solar integration
No ¦ Yes
No
4790 F Temp diff on return div 10 0 40 °C
4791 F Temp diff off return div 5 0 40 °C
4795 F Compar temp return div
B4 ¦ B41 ¦ B42
B42
4796 F Optg action return diversion
Temp decrease ¦ Temp increase
Temp increase
4800 F Partial charging setpoint − − − − − − / 8 95 °C
DHW storage tank
5020 F Increase of the flow temperature setpoint 16 0 30 °C
5021 F Increase of transfer boost 8 0 30 °C
5022 F Type of charging
with B3 ¦ With B3 and B31 ¦ Legio B3 and B31
With B3 and B31
5050 F Charging temp max 80 8 BZ 5051 OEM °C
5055 F Recooling temp 80 8 95 °C
5056 F Recooling heat gen/HCs
Off ¦ On
Off
-
5057 F Recooling collector
Off ¦ Summer ¦ Always
Off
-
5060 F Electric immersion heater:operating mode
Substitute ¦ Summer ¦ Always
Substitute
-
5061 F Electric immersion heater release
24h/day ¦ DHW release¦ Time program4/ DHW
DHW release
-
5062 F El immersion heater control
External thermostat ¦ DHW sensor
DHW sensor
-
5085 F Excess heat draw
Off ¦ On
On
-