User Manual

52 / 100
Siemens Synco™ living Operating instructions CE1B2707en
Building Technologies Central apartment unit QAX910 23.08.2008
Stage setpoint for humidity limitation
If the measured humidity exceeds the humidity limit value, ventilation is
started at the stage set here.
Main menu > Ventilation > Humidity limitation > Stage setpoint:
Factory setting Stage 1
Setting  Off
 Stage 1
 Stage 2
 Stage 3
Humidity limit value
Specify the desired humidity limit value (1..99% r.h.).
Main menu > Ventilation > Humidity limitation > Humidity limit:
Factory setting 85% r.h.
Setting
Night cooling
If there is cooling demand, ventilation can precool the rooms while vacant
(e.g. at night). This saves cooling energy during occupancy.
When night cooling is active, HR bypass for the ventilation unit can be activated.
Night cooling needs an outside temperature sensor and a room tem-
perature sensor in the desired reference room. The reference room
must be preset.
The outside air dampers of the ventilation plant must be open when
night cooling is active.
For night cooling, several conditions must be met at the same time:
• Heating must be in summer mode.
• The apartment operating mode must be Auto and the time switch in the
Economy phase (absence).
• A reference room must be preset.
• The reference room temperature must be min 1 K above the Comfort heat-
ing setpoint.
• The outside air temperature must be below the reference room temperature
by a preset value.
• The outside air temperature must not be below the preset outside tempera-
ture limit value.
• The time to the next regular switch-on of ventilation (as per time switch /
holiday program / special day) must be shorter than the set max precooling
time.
Night cooling ends if one of the release criteria is not met or when the Comfort
heating setpoint is reached.