Operating Instructions

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Siemens Synco™ living CE1B2740en
Building Technologies Central apartment unit QAX9x3 13.12.2010
Operating mode via contact
Specify the type of DHW operating mode the controller is to change over to
when an external operating mode contact is connected (e.g. teleswitch for re-
mote operation by phone).
Operating mode changeover via external contact overrides all other operating
mode settings.
The input function “operating mode contact” must be configured during
commissioning.
The same operating mode contact is used for heating/cooling, ventila-
tion and DHW.
Main menu > DHW > Operating mode > Optg mode contact:
--- The external operating mode contact has no influence on
DHW operating mode (factory setting).
Normal
DHW is heated to Normal setpoint when the contact is
closed.
Reduced
DHW is heated to Reduced setpoint when the contact is
closed.
Protection
DHW is heated to Protection setpoint when the contact is
closed.
DHW temperature setpoint
You can change the setpoint if the DHW temperature is too high or low:
Main menu > DHW > Setpoints > Normal setpoint:
Factory setting 55 °C
Main menu > DHW > Setpoints > Reduced setp:
Factory setting 40 °C
DHW time switch
In DHW operating mode “Auto“, the central apartment unit controls DHW
charging in accordance with the DHW time program.
Main menu > DHW > Time switch > Weekday X:
You can set up to 6 switching points for each weekday plus one special day.
You can also define the DHW temperature setpoint (Normal or Reduced) to be
used at each switching point.
The switching points can be set, deleted or copied to some other weekday.
The settings are made analogously to the room time switch settings (see page 41).