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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Line no.. Operating line
5775
Boiler pump with DHW
Off
On
This parameter controls the activation of boiler pump Q1 during DHW operation.
Application example: Boiler pump during DHW operation = OFF
7471d78/0114
Figure 86: Boiler pump during DHW operation
Key
Q1 Boiler pump
Q3 Diverting valve
Off
The boiler pump is not integrated hydraulically during DHW operation and does not run
in the case of DHW requests.
The DHW is connected directly to the boiler.
Note!
In cascade operation (hybrid operation), the DHW separate circuit parameter must be
set to On.
On
The boiler pump is integrated hydraulically for all requests and so runs in the case of all
requests.
Note!
In the case of primary heat exchangers, the Boiler pump with DHW (5775) parameter
must be set to On, even if the boiler pump does not run during DHW operation!
Danger!
When used in conjunction with a boiler flow switch and/or pressure sensor, the
boiler may only start up sometimes, or not at all.
This depends on where the sensors are positioned and the configuration.
In this case, the (frost) protection functions will no longer be performed.
Boiler pump with DHW
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