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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Time program 4/DHW
If used for that purpose, DHW charging with the electric immersion heater is released
within time program 4 to keep the DHW temperature at the Nominal setpoint. When the
Legionella function is activated, charging to the Legionella setpoint takes place. Outside
the release times of the time program, charging to the Reduced setpoint is ensured.
If required, the automatic DHW push can also switch to the Nominal setpoint outside
the release period. When DHW heating is Off, the storage tank temperature is
maintained at the Frost protection level (refer to chapter Frost protection for the DHW
storage tank). Manual push can be activated.
Example:
h
0 6 12 18 24
Figure 81: Electrode immersion heater – Time program 4/DHW
Note!
Release of DHW heating takes place only if setting El imm heater optg mode (5060)
allows the electric immersion heater to be in operation.
Line no. Operating line
5062 El immersion heater control
External thermostat
DHW sensor
In the case of DHW heating with an electric immersion heater, the storage tank
temperature can be monitored using either an external thermostat in the heater or the
controller’s sensors.
External thermostat
The electric immersion heater is enabled during the release time, independent of the
DHW storage tank temperature. The required storage tank temperature is to be set at
the external thermostat.
DHW sensor
During the release time, the electric immersion heater is enabled depending on the
storage tank temperature. The current DHW setpoint is maintained. If sensor B3 is a
thermostat, temperature control is ensured by that thermostat.
Note!
To ensure that the control with the sensor works, the external thermostat must be set
to the minimum storage temperature.
El immersion heater
control
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