Cooling Circuit - Siemens AVS75.39 Series User Manual

Operating mode
Off
Automatic
Manual mode
Setpoints
Comfort setpoint
70 / 239
Siemens
Building Technologies
6.4

Cooling circuit

B9
Y23/Y24
Q2 Q24
B16
C
RG1
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.
This setting is the same as the cooling mode selecting using the cooling button on
a room unit.
The cooling function is deactivated.
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.
If the cooling enable signal is set to 24h/day via operating line 907, then the cooling
button can be used as an on/off button. (Manual mode)
Line no. Operating line
902 Comfort 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.
In the summer, the Comfort setpoint is shifted as a function of the outside
temperature (918 - 920).
User manual RVS43.345
The settings in detail
To be able to operate the cooling circuit, an appropriate
partial diagram "Heating / cooling" must be used.
The system starts to operate in cooling mode when the
room temperature rises above the Comfort cooling
setpoint (902). The cooling function must be activated (901
= Auto) and enabled in accordance with the time program
(907).
Furthermore, the criteria "Cooling limit at OT" (operating
line 912) and "Lock time at end of heating" (operating line
913) must be met.
Cooling mode is cancelled in a 2-pipe system (with active
cooling) when a consumer requires heat.
It is possible to charge DHW and heat (using another
heating circuit) a heating circuit during cooling mode with a
4-pipe system.
CE1U2354en_021
2013-09-02