Vaillant VRT 90 Bedienungsanleitung Seite 13

Two-point or constant regulation (page 69)
Two-point regulation (factory-adjustment)
Z A
is required if the power rating of the
heating system is considerably more
than the calculated heat requirement
(e.g. in order to achieve a greater hot-
water capacity).
Constant regulation is recommended if
Z A
the heat rating corresponds to the
calculated heating requirement.
Setting the lower temperature (page 69)
The lower temperature can be set at the
potentiometer to the user's desired level.
Technical specifications
Device type
Operating voltage
Power consumption
Day-temperature range
Lower temperature range
Available heat-up phases
Proportional range
Switching difference
Dimensions W x H x D
Connection leads
Protection rating
Protection classification
Operating temperature
Permitted storage temp.
GB
VRT 90
max. 30 V=
max. 20 mA
+5 to +30°C
+5 to +20°C
4 per hour
2 K
1 K
148 x 85 x 40 mm
2
min. 3 x 0,75 mm
IP 30
III
+5 to +50 °C
-25 to +70 °C
13