Frost Protection For The Circulation Pipe - Siemens LMS14 User Manual

Circulating pump
cycling
Circulating setpoint
Building Technologies Division
Line no. Operating line
1661 Circulating pump cycling
Off
On
To minimize circulation losses, the circulating pump can be controlled in cycling mode.
When the function is activated, the circulating pump is switched on for 10 minutes
within the release time and then switched off again for 20 minutes.
Note!
If the pump is activated due to the Legionella function, it does not cycle. When the
Legionella function is deactivated, the pump runs continuously during the release
time.
Off
Function is deactivated.
On
Function is activated.
Line no. Operating line
1663 Circulating setpoint
When using a circulation sensor, the circulating pump is activated within the release
time whenever the temperature acquired by that sensor falls below the circulation
value. The pump keeps running until the circulation value is reached again. The
minimum on time is 10 minutes. At the top, the setting of the circulation value is limited
by the nominal setpoint.
Note:
When using a circulation sensor, the temperature acquired by it is also used for the
legionella function (dwelling time).
6.7.11

Frost protection for the circulation pipe

If the temperature acquired by the circulation sensor drops below the Frost protection
level, the pump is also activated outside the release times until the Frost protection
level of 5 °C is reached. The minimum on time is 10 minutes.
Note!
This function is only available if a circulation sensor is connected.
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6 The settings in detail
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07.05.2014