Siemens LMS14

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Cons circuit pump VK2 Q18
Consumer circuit pump VK2 can be used for an additional consumer. Together with an
external request for heat at input H and configuration Consumer request VK2, an air
heater or similar piece of equipment can be operated.
System pump Q14
The connected pump serves as a system pump, which can be used to supply heat to
additional consumers. It is put into operation when there is a request for heat from one
of the consumers. If there is no request, the pump is deactivated on completion of the
overrun time.
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. The automatic
heat generation lock locks the heat sources and hydraulically disconnects them from
the rest of the plant via heat source shutoff valve Y4.
Provided that demand can be met from the buffer, the heat generation shutoff valve
remains switched off (Y4 = OFF).
It is only when the buffer is no longer capable of satisfying demand that a requirement
message is sent to the heat source and the heat generation shutoff valve is switched
on (Y4 = ON).
This means that the consumers draw their heat from the buffer storage tank and wrong
circulation through the heat sources will be prevented.
Solid fuel boiler pump Q10
For the connection of a solid fuel boiler, a circulating pump for the boiler circuit is
required.
Time program 5 K13
The relay is controlled according to the settings made in Time program 5.
Buffer return valve Y15
This valve must be configured for return temperature increase/decrease or partial
charging of the buffer storage tank.
Solar pump ext exch K9
For the external heat exchanger, Solar pump ext exch K9 must be set at the
multifunctional relay output QX or PWM output P1. If both a DHW and a buffer storage
tank are available, External solar exchanger (5841) must also be set.
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).
Swimming pool pump Q19
Using the swimming pool pump, the swimming pool can also be heated by the heat
source.
Cascade pump Q25
Common boiler pump for all boilers in a cascaded system.