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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.17.10 Heat transfer to the DHW storage tank
The DHW storage tank can be charged by the buffer storage tank, provided the latter’s
temperature level is high enough. Depending on the type of hydraulic circuit, the
transfer of heat can be effected either via charging pump Q3 or transfer pump Q11,
which can be configured for this function.
The parameter settings for the point in time heat transfer shall take place, the transfer
sensor and the transfer boost apply to both plant configurations.
Heat transfer via charging pump Q3
The DHW storage tank is charged from the buffer (once sufficiently hot) using charging
pump Q3, if the With buffer (5090) setting has been made for the DHW storage tank.
If Q3 is configured as a diverting valve, or a transfer pump Q11 is configured, there will
be no transfer of heat via Q3. Also, it is possible to parameterize the point in time
charging by the buffer storage tank shall take place, if required. The minimum boost for
the transfer can be set.
Special feature: If a manual push is triggered during heat transfer, the transfer is
aborted and normal charging by the heat source is initiated, unless the buffer storage
tank is able to satisfy the higher request for heat (function Automatic heat generation
lock).
Heat transfer via transfer pump Q11
If a transfer pump Q11 is configured – used specifically for this purpose – the transfer of
heat is effected via this pump.
This heat transfer takes place regardless of whether or not the With buffer (5090)
setting has been applied for the DHW storage tank.
And charging pump Q3 is only used for charging by the heat source.
Time of heat transfer
In DHW mode Off, there is no transfer of heat.
When using parameter Transfer strategy (5130), the transfer can be scheduled to
impose time limits.
Line no. Operating line
5090 With buffer
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