Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
The pressure value at 0.5 V is fixed at 0 bar.
The pressure value at 3.5 V can be adjusted with parameter Pressure value 3.5V H…
(operating line 5956).
N/C contact
The contact is normally closed and must be opened to activate the selected function.
N/O contact
The contact is normally open and must be closed to activate the selected function.
The function “Minimum flow setpoint” set on operating line 5950, 5960 or 6046 is
activated via contact H... The boiler is controlled constantly at the temperature level set
here either until contact H… opens again or until a higher heat request is delivered.
If several heat requests are received at the same time (LPB, contact H.. contact, DHW,
or from the controller itself), the highest of them will automatically be selected.
30 20 10 0 -10
40
30
60
50
80
70
TVw
TVw
2355Z20
TA
°C
°C
gem
0
TVHw
TVHw Minimum flow temperature setpoint
TVw Flow temperature setpoint
The voltage signal present at input H.. is converted to a linearized temperature value
and then forwarded as the flow temperature setpoint.
The flow temperature setpoint corresponding to the voltage level of 10 V can be
adjusted via parameter “Temperature value 10V H…“.
[v]
0
2
4
6
8
10
10 20 30 40
50 60 70 80 90 100 110 120
130
[°c]
2379Z26
T = 130°C T = 50°C T = 70°C T = 90°C T = 110°C
S = 5°C
T = maximum value of heat demand
S = minimum limitation of heat demand = 5 °C
Contact type, input H...
Min flow temp setpoint H..
Temp value 10V H..