Siemens LMU64 Series - Page 5

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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products Contents 07.11.2002
− Task of ∆T control with PWM pump ...............................................61
− First stage Maximum limitation of the flow temperature..................62
− Second stage ∆T limitation........................................................62
− Third stage ∆T supervision ........................................................63
− PWM pump control......................................................................63
− H-Q chart (example).................................................................63
− Adaption of modulating pump to the heating plant.........................64
− Parametes of the PWM pump (OEM).............................................64
− Preset parameters .......................................................................64
− Activation of PWM pump via a configuration byte.............................65
− Parameters of the PWM pump (installer) ........................................66
− Parameters for temperatures ........................................................66
− PID controller coefficients of delta-T supervision..............................67
− Summary of all ∆T parameters ......................................................67
− Behavior in different operating modes ............................................68
− Pump overrun..........................................................................68
− Normal operation (heating operation)..........................................68
− Reduced (setback) operation.....................................................68
− Shutdown mode.......................................................................68
− Heating up phase.....................................................................68
− DHW operation........................................................................69
3.9 Heating circuit control..........................................................................70
− Attenuated outside temperature .................................................70
− Composite outside temperature ...................................................71
− Type of building construction .....................................................71
− Heating curves.........................................................................72
− Generating the demands for heat ..................................................73
− Time switch.............................................................................74
− Room thermostat .....................................................................75
− RU .........................................................................................75
− Combinations of RU and room thermostat / time switch.................76
− ECO functions ............................................................................77
− S / W changeover.....................................................................77
− Automatic 24-hour heating limit..................................................77
− Quick setback constant (KON) ......................................................78
− Generating the temperature demands .............................................78
− With fixed value control or emergency operation...........................78
− With weather compensation.......................................................78
4 Clip-in AGU2.500... for additional heating circuit.................................79
− Functions ...................................................................................79
− General...................................................................................79
− Hydraulic diagrams......................................................................79
− Sensor inputs (analog inputs)........................................................79
− Inputs / outputs...........................................................................79
− Interfaces for the LMU..................................................................80
− Sensor.......................................................................................80
− Frost protection...........................................................................80
− Overtemperature protection..........................................................80
− Mixing circuits..........................................................................80
− Determining the flow temperature setpoint ......................................80
− Handling the locking signal........................................................80