Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
6.5.21 Frost protection for the room
Frost protection for the room ensures that the heating is switched on whenever the
room temperature drops below the Frost protection setpoint (714/1014/1314),
independent of operating mode, holidays or ECO functions.
Frost protection for the room On when: Room temperature < Protection level minus 1 K
Frost protection for the room Off when: Room temperature > Protection level minus 0.5 K
Note!
This function cannot be deactivated. If frost protection for the room becomes active,
the heat source is switched on also. Without room sensor or with compensation
variant Weather compensation, the Frost protection function is performed by making
use of the room model.
Line no. Operation line
HC1 HC2 HC3
714 1014 1314 Frost protection setpoint
6.5.22 Frost protection for the heating circuit in Heating mode
The Frost protection function for the heating circuit ensures that the heating is switched
on whenever the flow temperature drops below the Frost protection level of 5 °C,
independent of operating mode, holidays or ECO functions.
The function remains active until the flow temperature exceeds the Frost protection
level by 2 K and then continues to be active for another 5 minutes. This ensures that
the entire heat distribution system reaches a certain temperature level.
While frost protection for the heating circuit is active, a request for heat is sent to the
heat source. The function can be deactivated. Without flow sensor, the Frost protection
function for the heating circuit is performed with the temperature delivered by the heat
source.
Line no. Operating line
HC1 HC2 HC3
812 1112 1412 Frost protection flow temp
Off
On
This parameter can be used to switch frost protection for the heating circuit on and off.
Note!
Frost protection for the heating circuit should be switched off only if adequate
measures are taken (e.g. antifreeze in the heating circuit water), ensuring that
external frost protection is provided.
A
dditional parameters
Frost protection flow temp

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English