Siemens AVS75.39 Series User Manual page 138

El immersion heater
control
DHW push
Automatic push
Charging prio time push
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Siemens
Building Technologies
In the case of DHW heating with electric immersion heater, the storage tank
temperature can be monitored either with an external thermostat in the heater or
the controller's inbuilt sensors.
Control with external thermostat
The controller releases constantly DHW heating with the electric immersion heater
within the release period, regardless of the storage tank temperature. The
controller's current DHW setpoint has no impact.
The required storage tank temperature must be adjusted on the external
thermostat. The manual push cannot be activated. The "Legionella" function is
deactivated.
Control with DHW sensor
The controller releases constantly DHW heating with the electric immersion heater
within the release period, regardless of the storage tank temperature. The
controller's current DHW setpoint is maintained.
If sensor input B3 is used for a thermostat, temperature control is affected based
on the thermostat's contact position.
The manual push can be activated. When the "Legionella" function is activated,
charging to the legionella setpoint takes place.
To ensure that setpoint compensation operates as required, the external thermostat
must be set to the minimum storage temperature.
Line no. Operating line
5070 Automatic push
Off ¦ On
5071 Charging prio time push
The DHW push can be triggered either manually or automatically.
As a result, the DHW is charged once until the nominal setpoint is reached.
Off
The DHW push must be triggered manually. To do this, keep the DHW operating
mode button on the operator or room unit depressed for at least 3 seconds. The
DHW push can also be triggered when:
The operating mode is "Off"
Operating mode changeover is effected via H1 or centrally (LPB)
All heating circuits operate in holiday mode
On
If the DHW temperature falls by more than 2 switching differentials (5024) below
the reduced setpoint (1612), one-time charging to the nominal DHW setpoint
(1610) will take place again.
The automatic DHW push works only when the DHW heating is activated.
A manually triggered push is cancelled by changing over to ECO or OFF operating
mode.
With a DHW push, the DHW storage tank is charged with absolute priority for the
set period of time.
User manual RVS43.345
The settings in detail
CE1U2354en_021
2013-09-02