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Building Technologies Basic Documentation LMV5... CC1P7550en
8 Display and operating unit AZL5 22.05.2018
8.3.10 Real time clock / calendar, automatic summer /
wintertime changeover
The LMV5 is equipped with a real time clock including calendar and backup, which are
accommodated in the AZL5.
The clock features automatic summer- / wintertime changeover.
The following parameter setting choices are available:
Parameter Sum/WinterTime (Manual / Automatic)
Time EU/US (S/W time EU / S/W time US)
S/W time EU: start: Last Sunday in March
end: Last Sunday in October
S/W time US: start: First Sunday in April
end: Last Sunday in October
Changeover takes place on the dates given above in the night between 02:00 and 03:00
hrs. The time shift is always 1 hour.
Changeover takes place only if the AZL5 receives power at that moment in time.
Backup is about 10 years.
The backup battery is a replaceable lithium battery.
Refer to chapter Technical data.
When changing batteries, ensure ESD protection!
If the AZL5 uses the associated interface to communicate with a BACS, the latter can act
as the clock master by cyclically transmitting a preset time of day and date to the AZL5.
This information is given priority over all other time of day / date sources.
8.3.11 Adjustment of contrast, shut-off, quick access
In normal operation of the AZL5, the contrast of the display can be adjusted.
To do this, keep the Enter button depressed and, at the same time, press the
Selection buttons ( + or - ).
The display contrast changes correspondingly.
The adjustment does not change until power supply is turned off.
For permanent adjustment, use the menu at the parameter setting level.
Lockout of the LMV5 can be triggered by simultaneously pressing Enter and Esc.
Lockout is stored in the LMV5.
To be able to check burner operation any time, press the 2 Select buttons
simultaneously to switch from any menu item to the Normal operation view, either during
operation when making parameter settings, or when programming. To return to the
menu item previously used, press Esc.
S/W changeover
Backup
Type of battery
Adjustment of contrast
(display)
Shutdown function
Quick access
Normal operation
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