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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the heating engineer settings 15.07.2002
0 Autonomous clock
• The clock time on the unit can be adjusted
• The controller's clock time will not be matched to the
system time
Adjustment
Controller time
System time
1 System time
• The clock time on the unit cannot be adjusted
• The controller's clock time will automatically and
continuously be matched to the system time
Adjustment
Controller time
System time
2 System time with adjustment
• The clock time on the unit can be adjusted and, at
the same time, adjusts the system time since the
change will be adopted by the master
• The controller's clock time is still automatically and
continuously matched to the system time
Adjustment
Controller time
System time
3 System clock (master)
• The clock time on the unit can be adjusted and, at
the same time, adjusts the system time
• The controller's time is used for the system
Adjustment
Controller time
System time
4.59 Winter- / summertime changeover
Automatic changeover of the yearly clock to summertime.
In accordance with present international standards, the change from wintertime to
summertime takes place on the last Sunday in March. The standard setting of the
controller complies with this rule since that Sunday lies between the standard setting
and the last day of the relevant month. With this setting, the day of changeover can be
matched to changing standards.
On the Sunday following that date, the controller’s time of day will switch over to
summertime.
For that purpose, the time of day is shifted forward by one hour.
Setting range Unit Factory setting
01.01...31.12. tt.MM 25.03.
Benefit
International standards
Description
Setting
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