Partial Charging - Siemens LMS14 User Manual

Partial charging setpoint
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Building Technologies Division
6.17.7

Partial charging

Line no. Operating line
4800 Partial charging setpoint
By hydraulically decoupling the lower buffer storage tank section, the chargeable
storage volume is reduced. As a result, the upper storage tank section is charged in a
shorter period of time. The lower storage tank section is charged only when charging of
the upper section is completed.
As soon as the temperature acquired by sensor B4/B42 reaches the setpoint of partial
charging, the diverting valve switches over to through-port and the rest of the storage
tank is charged also. For switching over, a fixed switching differential of ¼ °C is used.
Note!
If the slave pointer is higher than the adjusted setpoint of partial charging, charging to
the slave pointer value takes place.
Configuration:
Extra function QX...
(Relay output QX1(5890),
Relay output QX2 (5891),
Relay output QX3 (5892),
Relay output QX4 (5894))
Sensor input BX...
(Sensor input BX1 (5930),
Sensor input BX2 (5931),
Sensor input BX3 (5932)
B4 / B42
Figure 74: Partial charging
User Manual LMS14...
6 The settings in detail
Buffer return valve Y15 in the buffer storage tank
Sensor B4 or B42
CC1U7471en
28.01.2015