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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.253 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 con-
troller 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 sum-
mertime.
For that purpose, the time of day is shifted forward by one hour.
Setting range
Unit
Factory setting
01.01....31.12 hh:mm
25.03
4.254 Summer- / wintertime changeover
•
Automatic changeover of the yearly clock to wintertime.
In accordance with present international standards, the change from summertime to
wintertime takes place on the last Sunday in October. The standard setting of the con-
troller 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 winter-
time.
For that purpose, the time of day is shifted backward by one hour.
Setting range
Unit
Factory setting
01.01....31.12 hh:mm
25.10
Benefit
International standards
Description
Setting
Benefit
International standards
Description
Setting