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Siemens Building Technologies
HVAC Products
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Handling the forced signal......................................................... 80
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Flow temperature control.............................................................. 80
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Pump control.............................................................................. 81
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Pump control with pump circuits................................................. 81
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Pump control with mixing circuits ............................................... 81
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Pump overrun.......................................................................... 81
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Pump kick ............................................................................... 81
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Mixing valve control..................................................................... 81
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Position of mixing valve in the idle state...................................... 81
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Functional test ............................................................................ 81
5
Clip-in module OCI420... for communication via LPB.......................... 82
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Functions ................................................................................... 82
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General .................................................................................. 82
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Inputs / outputs........................................................................... 82
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Interfaces to LMU........................................................................ 82
5.1
Connection of LMU... to ALBATROS via OCI420 (LPB clip-in) .................. 82
5.1.1
Additional heating circuit extensions via ALBATROS controllers ................ 82
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Automatic changeover of operating mode....................................... 83
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Giving consideration to heat demand from the RVA......................... 83
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Locking and forced signals when connecting to the LPB ................... 83
5.1.2
External DHW heating by ALBATROS controllers ................................... 83
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Type of priority of DHW heating .................................................... 84
5.1.3
Multiboiler plants with LMU (cascade applications).................................. 84
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Separate DHW circuit in cascade applications ................................. 85
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Operation with the RVA65... ......................................................... 85
5.1.4
System functions ................................................................................ 86
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Uniform system time.................................................................... 86
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Error / diagnostic messages from the LMU...................................... 86
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Outside sensor, outside temperature sensor ................................... 88
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Assignment of address numbers ................................................ 88
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Setting the LPB device and segment address ................................. 88
6
Clip-in function module AGU2.51x ..................................................... 89
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Functions ................................................................................... 89
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General .................................................................................. 89
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Outputs...................................................................................... 89
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Number of available outputs...................................................... 89
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Inputs ........................................................................................ 90
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Digital input ............................................................................. 90
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Analog input ............................................................................ 90
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Predefined setpoint (temperature demand).................................. 90
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Predefined output .................................................................... 91
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7
DHW control (BWR) .......................................................................... 93
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systems ..................................................................................... 93
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DHW temperature control............................................................. 94
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Compensation variants ............................................................. 94
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Position of diverting valve .......................................................... 95
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Storage tank systems ............................................................... 95
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Stratification storage tank .......................................................... 96
Basic Documentation LMU54... / LMU64...
Contents
CC1P7494en
07.11.2002
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