VRT 50 Room Thermostat Operating and Installation Manual
2
You can preset the target room temperature for the
heating with the VRT 50.
Furthermore the controller shows you the heating re-
quirements for hot water and operation or any malfunc-
tion/maintenance messages of the boiler.
3 Operation
The operating principle is based on a dial (Vaillant “turn
and click” operating concept).
The current room temperature is displayed on the basic
display. The hot water symbol is displayed whenever
there is a hot water requirement or the hot start func-
tion is activated.
The “flame” symbol is displayed when the boiler is in
operation. The “boiler malfunction” symbol is dis-
played if there is malfunction to the boiler. Maintenance
requests of the boiler are indicated by the “spanner”
symbol flashing.
3.1
Setting the target room temperature
The current room temperature is displayed on the basic
display.
• Turn the dial (basic display).
The ACTUAL temperature disappears from the display
and the set target room temperature appears and starts
to flash.
• You can set the target room temperature directly
(after about 1 second) to the desired value by turning
the dial.
The basic display reappears after about 5 seconds.
3.2
Activating the hot start function
The hot start function of the boiler can be switched on
or off with the VRT 50.
This is convenient for long periods of absence to avoid
unnecessary consumption of energy.
h
Note!
To use this function, you need to have activated
the hot start function on your boiler. You can
find appropriate instructions in the operating
manual of your boiler.
• You can switch on the hot start function by pressing
and turning (after one second) the dial.
• You can switch off the hot start function by pressing
and turning (after one second) the dial again.
4 Vaillant
warranty
See supplement 0020029010.
5
Recycling and disposal
Neither your (programmable) room thermostat nor any
of its accessories belong in the household waste.
Make sure the old device and any existing accessories
are disposed of properly.
Installation instructions
6
Notes on the installation and
operation
The installation, electrical connection, settings and initial
start-up of the device may be performed only by an ap-
proved qualified servicing company.
6.1 CE
label
The CE label documents that the VRT 50 (programma-
ble) room thermostat, when connected to Vaillant boil-
ers, meets the basic requirements of the directive on
electromagnetic compatibility (89/336/EEC) and the low
voltage directive (73/23/EEC).
6.2 Intended
use
The VRT 50 (programmable) room thermostat is a state-
of-the-art device which has been constructed in accord-
ance with recognised safety regulations. Nevertheless,
there is still a risk of death or injury to the user or oth-
ers or of damage to the device and other property in the
event of improper use or use for which it is not intended.
The VRT 50 (programmable) room thermostat is used
for the room-dependent control of a heating system with
boiler with eBUS interface from Vaillant.
Any other use or extended use is considered to be im-
proper. The manufacturer/supplier is not liable for any
resulting damage. The owner alone bears the risk.
Intended use includes the observance of the operating
and installation manual.
