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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
ON
The separate circuit is switched on. DHW charging takes place solely via the heat
source selected for it.
For the separate circuit, DHW controlling element Q3 must be set to “Diverting
valve”!
Heat pump
Line no. Operating line
5800 Heat source
Brine ¦ Water ¦ Air ¦ External
5807 Refrigeration
Off ¦ 4-pipe system ¦ 2-pipe system
5810 Differential HC at OT -10°C
The heat source used by the heat pump is to be selected on this operating line. This
defines the number and types of sensors required and matches functionality to the
relevant type of heat pump.
Brine
E.g. when using geothermal heat.
Water
E.g. when using ground water, lake water or river water.
Air
When using air
Externally
When using a heat source with external control.
The external heat pump can be controlled via the Hx outputs (on / off).
Connection of heat pump sensors to the Siemens controller is optional.
Sensors connected to the controller are used and the associated functions are enabled.
When B71 is connected, use can be made of the controller’s internal compressor stage
control. In that case, the compressor stages must also be connected directly to the
controller.
This defines whether and for which system refrigeration is generated.
Off
No generation of refrigeration.
4-pipe system
Refrigeration is generated for a 4-pipe system and supplied either via separate pipes or
the same pipes as for heating / cooling.
2-pipe system
Refrigeration is generated for a 2-pipe system and supplied via the same pipes as for
heating and cooling.
For the heat pump to be controlled according to the return temperature setpoint, the
latter must be determined first.
For that purpose, the flow temperature setpoint (according to the heating curve) is
reduced by the expected temperature differential across the condenser and used as the
return temperature setpoint.
Heat source
Refrigeration
Differential HC at OT -10
°C
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