Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Heating circuits 23. August 2007
2358Z06
-15
-5
TR
TRK
TAgem
TRwA2TRwA1
TRR
TRwA1 Reduced setp increase start
TRwA2 Reduced setp increase end
TRK Comfort cooling setpoint
TRR Reduced room temperature setpoint
TAgem Composite outside temperature
Overtemp prot pump circuit
Line no. Operating line
HC1 HC2 HCP
820 1120 1420 Overtemp prot pump circuit
In the case of heating plant with pump heating circuits, the flow temperature of the
heating circuit can be higher than the flow temperature demanded by the heating curve,
due to requests from other heat consumers (mixing heating circuit, DHW charging,
external heat demand), or a parameterized minimum boiler temperature. As a result of
this too high flow temperature, the pump heating circuit would assume excessive
temperatures.
The function "Overtemperature protection for pump heating circuits" ensures that the
energy supply for pump heating circuits corresponds to the demand from the heating
curve by activating / deactivating the pump.
Mixing valve control
Line no. Operating line
HC1 HC2
830 1130 Mixing valve boost
832 1132 Actuator type
2-position ¦ 3-position
833 1133 Switching differential
2-pos
834 1134 Actuator running time
The selection of the type of actuator determines the control behavior for the type of
mixing valve actuator used.
For the 2-position actuator, the 2-position switching differential must also be adapted.
This is not required when using a 3-position actuator.
To ensure proper mixing valve flow temperature control, the flow temperature must be
higher than the demanded setpoint of the mixing valve flow temperature. The value set
here is added to the request.
Setting the running time of the actuator used with the mixing valve.
A
ctuator type
Switching differential
2-pos
Mixing valve boost
A
ctuator running time