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Building Technologies Basic Documentation LMV37.4... CC1P7546en
HVAC Products Contents 01.12.2009
12 Power output X74.3........................................................................................ 108
12.1 Safe separation of mains voltage and extra low-voltage ............................. 108
12.2 Modulating operation ....................................................................................... 108
12.3 2-stage operation ............................................................................................. 108
12.4 3-stage operation ............................................................................................. 109
13 Fuel meter input X75.1 / X75.2 ..................................................................... 110
13.1 Configuration of fuel meter.............................................................................. 110
13.1.1 Types of fuel meters ........................................................................................ 110
13.1.2 Configuration of pulses per volume unit......................................................... 110
13.1.3 Reading and resetting the meter readings..................................................... 110
13.2 Fuel throughput ................................................................................................ 111
13.2.1 Configuration .................................................................................................... 111
13.2.2 Reading out the fuel throughput...................................................................... 111
14 Inputs and outputs......................................................................................... 112
15 Special feature: Identification of burner (ID)............................................. 113
16 Connection to superposed systems .......................................................... 113
16.1 General and functions of building automation system .................................. 113
16.2 Modbus ............................................................................................................. 115
17 PC software ACS410 ..................................................................................... 116
18 Error history.................................................................................................... 117
18.1 Error classes..................................................................................................... 117
18.2 Make-up of error history .................................................................................. 118
− Deleting the error history ........................................................................ 118
19 Lifecycle function .......................................................................................... 118
20 Safety notes for use of the AZL2…............................................................. 119
21 Operating the AZL2… unit............................................................................ 120
21.1 Description of the unit / display and buttons .................................................. 120
21.2 Meaning of symbols on the display................................................................. 121
21.3 Brightness of the display ................................................................................. 121
21.4 Special functions .............................................................................................. 122
21.4.1 Manual lockout ................................................................................................. 122
21.4.2 Manual control (manual request for output) ................................................... 122
21.5 Timeout for menu operation............................................................................ 123
21.6 Backup / restore ............................................................................................... 124
21.6.1 Backup .............................................................................................................. 125
21.6.2 Restore ............................................................................................................. 127
22 Operation of basic unit via AZL2…............................................................. 129
22.1 Normal display.................................................................................................. 129
22.1.1 Display in standby mode ................................................................................. 129
22.1.2 Display during startup / shutdown................................................................... 129
22.1.2.1. Display of program phases.............................................................................. 129
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