temperature setpoint. If the required cooling energy is available directly from the heat
pump, the source pump and the cooling circuit pump are put into operation. If the
temperature level of the source is too high, the pumps remain deactivated.
4-pipe system
Q2
HK
T
Y1/Y2
B1
Q24
KK
T
Y23/Y24
B16
The cooling and heating circuits draw their
cooling / heating energy from separate
circuits.
Operating mode
Line no. Operating line
901 Operating mode
Off ¦ Automatic*
The operating mode can be selected either via the operating mode button on the room
or operator unit or via the above operating line.
The cooling function is deactivated.
Off.
The cooling function is automatically enabled on the basis of the selected time program
(907), the holiday program and the occupancy button, and then activated if required.
utomatically
Setpoints
Line no. Operating line
902 Comfort cooling setpoint
In cooling mode, room temperature control maintains the Comfort setpoint adjusted
here. The Comfort setpoint for cooling can also be adjusted with the setting knob on the
room unit.
Comfort coolin
g setpoint
In the summer, the Comfort setpoint is shif
ted as a function of the outside temperature
(918 - 920).
Release
Line no. Operating line
907 Release
24 h/day ¦ Time program heating circuit¦ Time program 5
Parameter "Release" determines the time program in accordance with which cooling is
enabled.
Cooling is permanently enabled (24 hours a day)
24 hours a day
Time program
HC
Cooling is ena
bled in accordance with the heating circuit’s time program
Release of cooling takes place in accordance with time program 5.
Time program
5 / DHW
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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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