Siemens LMU54 Series - Page 4

4/171
Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products Contents 07.11.2002
− Heating circuits...........................................................................30
− Room setpoint ............................................................................32
− Configuration of the heating circuits...............................................34
− DHW circuit................................................................................35
3.3 Acquisition of actual values ..................................................................37
− Assignment of analog sensors ......................................................37
− Temperatures .............................................................................37
− Display of ionization current..........................................................38
3.4 Supervisory functions ..........................................................................39
− Temperature limiter function.........................................................39
− Flue gas temperature supervision..................................................39
− Plausibility check of sensor .......................................................39
− Function.................................................................................39
− Electronic (S)LT..........................................................................40
− Handling faults ........................................................................40
− Flow switch / water pressure supervision........................................42
− Function of flow switch..............................................................42
− Function of pressure switch.......................................................42
− Pressure sensor..........................................................................42
− Static supervision.....................................................................43
− Dynamic supervision ................................................................44
− Load limitation............................................................................45
− Speed limitation..........................................................................48
− Limitation of ionization current.......................................................48
3.5 Boiler control......................................................................................49
− Frost protection for the boiler........................................................49
− Controller delay ..........................................................................49
− Controller delay due to parameterization.....................................49
− Controller delay due to SLT criterion...........................................50
− Controller configuration................................................................50
− Transfer of setpoint / actual value...............................................50
− Determining the controller coefficients ........................................50
− Heat output limits.....................................................................51
− Boiler temperature control............................................................52
− 2-position control .....................................................................52
− Minimum boiler pause time........................................................52
− Boiler cycling protection...............................................................52
− Dynamic switch-off differential....................................................53
− Modulating control, conventional................................................54
3.6 Hydraulic system management (HSM)...................................................55
− Frost protection for the plant .........................................................55
3.7 Consumer management (CM) ..............................................................56
− Determining the demands for heat.................................................56
− Priorization of demands for heat ................................................56
− Determining the temperature demand............................................57
− Temperature limitation..............................................................58
− Summer / winter (S / W) changeover..............................................59
3.8 Electronically controlled PWM heating circuit pump.................................61
− General......................................................................................61
− Introduction................................................................................61
− Notes .....................................................................................61