Vaillant VRT-PZA Mode D'emploi page 27

A Operating instructions – 4 Setting the room temperatures
4.1 Selecting the daytime temperature
With the temperature selector (fig. 4.1), set the room
temperature at which you still feel comfortable in your
living room. Every degree above this represents an un-
necessary additional consumption of fuel by about 6%.
According to this daytime temperature, your room ther-
mostat then controls the room temperature during the
heating periods programmed according to chapter 5.
Recommendation: Set the temperature selector (2)
initially to 18 to 18°C...20°C.
4.2 Indicating the night-time
temperature
Press night-time temperature key
display shows the entered night-time temperature
(fig. 4.2) which is factory-set to 15°C. If this value is to
be altered, proceed according to chapter 4.3.
Press one of the keys (5), (6), (9), (11) or (12), the
display indicates the normal reading.
4.3 Altering the night-time temperature
Set the room temperature for the drop periods with
„night-time temperature"
Press Pro programming key (10), the room ther-
mostat changes to the programming mode (fig. 4.3).
Press night-time temperature key
displays shows a p before the set „night-time-
temperature" (fig. 4.4).
The night-time temperature can be increased up to
max. 20°C with the setting key + (in fig. 4.5 to
17°C).
The „night-time temperature" can be decreased to
(8), the
min. 5°C with the setting key –
Press Pro programming key for changing to
control mode (fig. 4.6).
(Fig. 1, 4)
as follows:
(8), the
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