Siemens LMU54 Series - 13 Glossary of Abbreviations; Constants; Variables

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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 13 Glossary of abbreviations 07.11.2002
13 Glossary of abbreviations
PkesselMax Constant for maximum boiler output (100 %)
PkesselMin Constant for minimum boiler output (0 %)
SdBwMin Minimum switching differential with 2-sensor storage tank systems
TqModAnlauf Duration of startup kick for the modulating pumps (10 seconds)
AlbaCode ALBATROS error code, standardized error code between RVA... controllers and LMU…
dTbwKomf DHW setpoint readjustment in comfort mode
dTbwAusl DHW setpoint readjustment with outlet temperature control
ek0 Current control differential in the boiler circuit (TkSoll – TkIst)
FreigabeDurchladung Identification of first DHW nominal level on the current day
Gebl_Drehz Current fan speed
Gebl_PWM Current fan control
IonStrom Ionization current (measured value)
MaxBoilerCapacity Maximum boiler capacity in kW
RelModLevSet Relative maximum heat output as predefined by the QAA73...
MinModulationLevel Minimum boiler output in %
modRegler Heat demand of the controller on the burner control
OT OpenTherm interface
NhzMaxAkt Resulting maximum heat output when speed limitation is active
PhzMaxAkt Resulting maximum heat output when speed limitation is inactive
PhzRelMmi Relative heat output as predefined by the HMI
PhzRelPc Relative heat output as predefined by the PC
Pumpe_PWM Current degree of modulation of the modulating boiler pump
QmodMinBw Degree of modulation during full charging of the stratification storage tank
RelativeModLevel Current heat output for the RU
SdAus Current switching differential off
SdEin Current switching differential on
TaGed Attenuated outside temperature
TaGem Composite outside temperature
TbwIst1 Actual value of the DHW temperature at sensor B3
TbwIst2 Actual value of the DHW temperature at sensor B4
TbwSoll Current DHW temperature setpoint
TbwSollMmi DHW temperature setpoint of the HMI
TbwSollRva DHW temperature setpoint of the RVA... controller
TdhwSet DHW temperature setpoint of the RU
teta_vl_max Current maximum flow temperature in heating circuit 1
TiAussen Actual outside temperature
TkIst Actual value of the boiler flow temperature
TkRuec Actual value of the boiler return temperature
TkSoll Boiler temperature setpoint
TrSoll Current room temperature setpoint
TrSet Room temperature setpoint of the HMI
TsRaum Room temperature setpoint resulting from the compensation variant
TsRaumAkt Current room temperature setpoint (incl. setback phases)
TsRaumMmi Room temperature setpoint of the HMI
TvIst Actual value of the flow temperature (second heating circuit)
TvSollMmi Flow temperature setpoint of the HMI
Constants
Variables