Vaillant VRT 350, Operating Instructions Manual, Page: 9 / 36

Overview of the equipment 3
0020135485_00 VRT 350 Operating instructions
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3.4.2 Hot water generation
You can use the controller to set the temperature and time
for the hot water generation. The heater heats the water in
the domestic hot water cylinder until it reaches the set tem-
perature. You can set a time period during which hot water
should be available in the domestic hot water cylinder.
3.4.3 ’VR 66’ Control Centre
If a ’VR 66’ Control Centre is connected, you can control
two independent heating circuits with just one ’VRT 350’
controller; e.g. one heating circuit is in the single-occupancy
house and the second heating circuit is in a guest apart-
ment in this building. In this case, one controller is always
the main controller (Zone 1) and the other controller is the
auxiliary controller (Zone 2). For Zone 1, which is controlled
via the main controller, all of the functions are available to
you. For Zone 2, you can use the auxiliary controller to set
the desired temperature for different times of the day and
different days of the week.
3.5 Frost protection function
The frost protection function protects the heating system
and apartment from frost damage.
The frost protection function monitors the room temperat-
ure. If the room temperature
–
falls below 5 °C, the controller switches the heater on
and controls the system to a target room temperature of
5 °C.
–
exceeds 5 °C, the heater is switched off but the room
temperature monitoring remains active.