Siemens AVS75.39 Series User Manual page 73

Limitations of flow
temperature setpoint
Flow temp setp min at
OT 25°C
Flow temp setp min at
OT 35°C
"Room influence"
Compensation variants
Weather compensation
alone
Siemens
Building Technologies
Line no. Operating line
923 Flow temp setp min OT 25°C
924 Flow temp setp min OT 35°C
A low limit can be defined for the flow temperature required for cooling. The limit
curve is determined by defining 2 fixed points.
In addition, there is a minimum limit for the resulting flow temperature setpoint,
which must not fall below 5 °C.
Defines the lowest permissible flow temperature at a composite outside
temperature of 25°C.
Defines the lowest permissible flow temperature at a composite outside
temperature of 35°C.
If there is no valid outside temperature available, the controller uses the value
"Flow temp setp min OT = 35 °C".
TVKw
923
924
25°C
TVKw Flow temperature setpoint for cooling (with minimum limitation)
TVKw_unb Flow temperature setpoint for cooling (without minimum limitation)
TAgem The composite outside temperature
Line no. Operating line
928 Room influence
When using a room temperature sensor, there is a choice of 3 different types of
compensation.
Selection Compensation variant
% Weather compensation alone*
1...99 % Weather compensation with room influence*
100 % Pure room compensation
* Outside sensor required.
The flow temperature is calculated based on the cooling curve, depending on the
composite outside temperature.
This compensation variant demands a correct adjustment of the cooling curve
since in that case the control gives no consideration to the room temperature.
User manual RVS43.345
The settings in detail
TVKw
TVKw_unb
35°C
TAgem
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CE1U2354en_021
2013-09-02