Siemens Albatros2 AVS37 User Manual Page 90

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Cooling circuit 23. August 2007
Summer compensation starts to take effect at the outside temperature set here. If the
outside temperature continues to rise, the comfort setpoint is raised in parallel.
Summer compensation takes full effect at this outside temperature (920). The comfort
setpoint is not affected by any further increase in the outdoor temperature.
This setting determines the maximum permissible increase in the comfort setpoint.
TRKw
920
919
T
A
2354Z16
918
902
TRKw Cooling setpoint
TA Outside temperature (OT)
Flow temperature setpoint limits
Line no. Operating line
923 Min. flow setpoint at OT 25°C
924 Min. flow setpoint at OT 35°C
A low limit can be defined for the cooling flow temperature.
The limit curve is determined by defining two fixed points.
There is also a low limit for the resulting flow setpoint, which must not fall below 5 °C.
This defines the lowest permissible flow temperature at a composite outside
temperature of 25°C/25°C.
If there is no valid outside air temperature available, the controller uses the value
"Flow setpoint min TA = 35°C"
TVKw
35°C
TAgem
2355Z07
25°C
924
923
TVKw
TVKw_unb
TVKw Flow temperature setpoint for cooling (with low limit control)
TVKw_unb Flow temperature setpoint for cooling (without low limit control)
TAgem Composite outside temperature
Start of summer
compensation at OT
End of summer
compensation at OT
Summer compensation
setpoint increase
Min. flow setpoint
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