Siemens LMS14 User Manual page 402

Stepper motor output
QX4 (WX1)
Relay output QX4
402/617
Building Technologies Division
Line no. Operating line
5894 Relay output QX4
None
Heat gen shutoff valve Y4
Buffer return valve Y15
Solar ctrl elem buffer K8
Solar ctrl elem swi pool K18
DHW ctrl elem Q3
Instant WH ctrl elem Q34
None
Relay output with no function.
Heat gen shutoff valve Y4
If the buffer storage tank holds a sufficient amount of heat, the consumers can draw
their heat from it, and the heat sources need not be put into operation. Automatic heat
generation lock locks the heat sources and hydraulically disconnects them from the rest
of the plant via heat source shutoff valve Y4. This means that the consumers draw their
heat from the buffer storage tank and wrong circulation through the heat sources will be
prevented.
Buffer return valve Y15
This valve must be configured for return temperature increase/decrease or partial
charging of the buffer storage tank.
Solar ctrl elem buffer K8
If several heat exchangers are used, the buffer storage tank must be set at the
respective relay output and, in addition, the type of solar controlling element must be
defined on Solar controlling element (5840).
Solar ctrl elem swi pool K18
If several heat exchangers are used, the swimming pool must be set at the respective
relay output and, in addition, the type of solar controlling element must be defined on
Solar controlling element (5840).
DHW ctrl elem Q3
Controlling element for DHW storage tank.
Instant WH ctrl elem Q34
Controlling element for instantaneous water heater.
User Manual LMS14...
6 The settings in detail
CC1U7471en
28.01.2015