Siemens LMU64 Series - 7.1 Special functions; Forced signals; Parameterization

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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 7 DHW control (BWR) 07.11.2002
7.1 Special functions
Forced signals give rise to heat supply by the boiler through activation of the pumps,
changeover of the diverting valve, or opening of the mixing valve. Forced signals are
triggered by the
− electronic safety limit thermostat
− temperature limiter
− chimney sweep function
− controller stop function
− frost protection for the boiler
7494b10E/0602
PC interface
OCI490A109
Int. bus Int. bus
QAA73...
Room unit
HMI
AGU2.361AGU2.303
PC tool
AGU2.310 ACS420
Choices and channels for parameterizing the BMU
Users Siemens, OEM, for use in laboratories
Features Changing individual parameters and a parameter set
Parameter types Safety-related and non-safety-related parameters
Parameter levels All
Connection OCI490... to LMU...-X40 or X50
Note: If the PC tool is connected to the LMU…, only one clip-in module may be
plugged in
Users Siemens, OEM, installer, enduser
Features Changing individual BMU parameters
Parameter types Non-safety-related parameters
Parameter levels Enduser, heating engineer, OEM
Connection QAA73...* I To LMU... plug-in space X10-01 or to
II AGU2.361...-X2 (QAA73... as a service unit)
III AGU2.362...-X1 (mounted in boiler control panel)
Connection AGU2.310 To LMU... plug-in space X30
* Note: With connection choices II and III, an RU connected to the LMU... will be
switched off.
Forced signals
Parameterization
Via PC tool
ACS420
and OCI490...
Via QAA73...
/ AGU2.310