Table of Contents
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Siemens Building Technologies
HVAC Products
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Instantaneous DHW system ........................................................ 100
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Notes ................................................................................... 100
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Hydraulic diagram .................................................................. 100
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Operating mode ........................................................................ 100
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Outlet temperature control (FS-DHW is closed) .......................... 100
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Comfort control (after FS-DHW opening) ................................... 100
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Aqua-booster system.................................................................. 103
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Hydraulic diagram .................................................................. 103
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Operating mode ........................................................................ 103
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Outlet temperature control....................................................... 103
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Comfort control...................................................................... 103
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Legionella function .................................................................... 104
7.1
Special functions .............................................................................. 105
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Forced signals .......................................................................... 105
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Parameterization....................................................................... 105
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Via PC tool ACS420 and OCI490... .......................................... 105
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Via QAA73... / AGU2.310........................................................ 105
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Via AGU2.361 / AGU2.303...................................................... 106
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Programmable input of the LMU... ............................................... 106
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Modem function ..................................................................... 106
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Warm air curtain function ........................................................ 106
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Programmable output of the LMU... ............................................. 107
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Status output ......................................................................... 107
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Alarm output.......................................................................... 107
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Operational status signal ......................................................... 107
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Switching off the external transformer ....................................... 108
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Pump output second heating circuit .......................................... 108
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DHW circulating pump ............................................................ 108
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Actuating device with warm air curtain function activated ............. 108
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Pump of pressureless header .................................................. 108
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Basic function of controller clip-in module .................................. 108
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Actuating device with full DHW charging activated ...................... 108
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Actuating device when analog signal exceeds threshold.............. 109
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Power concept .......................................................................... 109
8
Basic diagram................................................................................. 110
8.1
LMU... ............................................................................................. 110
9
Connection diagrams...................................................................... 111
9.1
LMU... ............................................................................................. 111
9.2
DHW stepper motor (bipolar) .............................................................. 112
9.3
AGU2.104A109 ................................................................................ 112
9.4
AGU2.500A109 ................................................................................ 113
9.5
AGU2.500A209 ................................................................................ 114
9.6
OCI420A109 .................................................................................... 115
9.7
OCI420A209 .................................................................................... 116
9.8
AGU2.51x ........................................................................................ 117
9.9
Connecting cable between OCI490... and PC....................................... 118
9.10
Mounting, electrical installation and service .......................................... 119
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Mounting (general) .................................................................... 119
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Mounting the LMU5x... ............................................................ 119
Basic Documentation LMU54... / LMU64...
Contents
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CC1P7494en
07.11.2002
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