Summer compensation
Line no. Operating line
918 Summer comp start at OT
919 Summer comp end at OT
920 Summer comp setp increase
In summer, the cooling Comfort setpoint (902) is shifted upwards as the outside
temperature increases. This saves cooling energy, and prevents too great a differential
between the room and the outside temperature.
The resulting room temperature setpoint (cooling) can be
displayed on the info level.
Summer compensation starts to take effect at the outside temperature set here. If the
outside temperature continues to rise, the Comfort setpoint is raised continuously.
Summer comp start at OT
Summer compensation takes full effect at this outside temperature (920). The Comfort
setpoint is not affected by any further increase in the outside temperature.
Summer comp end at OT
This setting determines the maximum permissible increase in the Comfort setpoint.
Summer comp setp
increase
TKw
920
919
TA
2355Z05
918
902
TKw Comfort cooling setpoint
TA Outside temperature
Flow temperature setpoint limits
Line no. Operating line
923 Flow temp setp min at OT 25 °C
924 Flow temp setp min at 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.
There is also a low limit for the resulting flow temperature setpoint, which must not fall
below 5 °C.
This determines the lowest permissible flow temperature at a composite outside
temperature of 25°C.
Flow
temp setp min at OT
25 °C
This determines the lo
west permissible flow temperature at a composite outside
temperature of 35 °C.
Flow
temp setp min at OT
35°C
If there is no valid outside te
mperature available, the controller uses the value
"Flow temp setp min OT = 35 °C".
100/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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