Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.23.4 DHW separate circuit
In multiple boiler systems, one of the boilers can be assigned to DHW charging.
During the time DHW charging is active, that boiler disconnects itself hydraulically from
the cascaded system and later rejoins the system when DHW heating is completed.
Line no. Operating line
5736 DHW separate circuit
Off
On
The DHW separate circuit can only be employed in a cascaded system.
Off
The DHW separate circuit is Off. Any of the boilers can charge the DHW storage tank.
On
The DHW separate circuit is On. The DHW is always heated by the boiler defined for
that purpose.
Note!
If a charging pump is configured as the DHW controlling element (5731) for the DHW
separate circuit, Boiler pump with DHW (5775) must be set to Off in the case of most
hydraulic systems.
Line no. Operating line
5737 Optg action DHW div valve
Position on DHW
Position on heating circuit
The diverting valve position selected here is the position used when the output is active:
Position on DHW
When the output is active, the diverting valve is in the DHW position.
Position on heating circuit
When the output is active, the diverting valve is in the Heating position.
Line no. Operating line
5738 Midposition DHW div valve
Off
On
Here, the DHW diverting valve can be driven to the mid-position.
This is used to fill or drain the heating circuits and the DHW circuit simultaneously.
This action must be reset manually.
Off
The diverting valve is driven to the position currently demanded, depending on the
request for heat and the basic position.
On
The diverting valve is driven to the mid-position.
DHW separate circuit
Optg action DHW div
valve
Midposition DHW div valve

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English