Siemens AVS75.39 Series User Manual page 58

Limitations of flow
temperature setpoint
Flow temperature
setpoint: Room
thermostat
Adaption of flow
temperature when
setpoint is fixed
58 / 239
Siemens
Building Technologies
Line no.
HC1 HC2 HC3
740 1040 1340
741 1041 1341
742 1042 1342
This limitation can be used to select a range for the flow temperature setpoint. If
the flow temperature setpoint demanded by the heating circuit reaches the relevant
limit and the heat request increases or decreases, the flow temperature setpoint
will be maintained at the maximum or minimum limit.
TV
max
akt
TVmin
min
0 10 20 30
TVw Current flow temperature setpoint
TVmax Flow temp setpoint max
TVmin Flow temp setpoint min
On applications with room thermostat, the heating circuit is switched on only when
the room thermostat calls for heat.
A fixed or weather-compensated temperature value is called for, depending on the
selected setting:
Selection Compensation variant
Temperature request according to the heating curve
8...95 °C Temperature request according to the set value*
* In Comfort mode only –
outside the Comfort there is no temperature demand and the heating curve remains switched off
The room thermostat can be connected via an Hx input (H1, H2 (module 1-3), H3)
to the controller or an extension module.
Line no.
HC1 HC2 HC3
744 1044 1344
The function is used for room temperature control with a room thermostat.
The flow temperature can be adapted based on demand if the flow temperature
setpoint is preset using parameter setting (line 742/1042/1342).
- - -
Setting "- - -" deactivates the function.
1...99%
Function is activated.
User manual RVS43.345
The settings in detail
Operating line
Flow temp setpoint min
Flow temp setpoint max
Flow temp setpoint room stat
TVw
40 50 60 70
Operating line
Swi-on ratio room stat
--- / 1..99%
TVmax
80 90 100 °C
CE1U2354en_021
2013-09-02