Vaillant VRT 392, Operating And Installation Manual

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Appendix
Glossary
Operating and Installation Instructions VRT 392
Glossary
Circulation pump
When you open the hot water tap it can take a few
moments - depending upon the length of the pipe -
before hot water comes out. A circulation pump pumps
hot water through the pipes in the hot water circuit. This
ensures that hot water is immediately available when
you open the tap. Time windows can be programmed for
the circulation pump.
Forward flow temperature
See heating feed temperature.
Heating circuit (HC1)
HC1 indicates heating circuit 1. This refers to the heating
of your heating system. If you wish to use a special
designation you can use a different designation in place
of HC1 (see operating instructions Section 4.7.5).
Heating feed temperature
Your boiler heats water which is pumped through your
heating system. The temperature of this hot water as it
leaves the boiler is referred to as the feed temperature.
Hot water generation
Your boiler heats the water in the hot water cylinder to
the selected target temperature. If the temperature in
the hot water cylinder falls by specific value, the water is
heated up again to the target temperature. Time
windows can be programmed for the hot water
generation.
Internal temperature
The internal temperature is the actual current
temperature in your apartment.
Operating level for the installer
It serves to display and to set/change specific
parameters. This user level is reserved for the installer
and is therefore protected by an access code.
Operating level for the user
It serves to display and to set/change the fundamental
parameters. Setting/changing the parameters can be
performed by the user without previous special
knowledge and during normal operation. The heating
system is continuously matched to the requirements of
the user by corresponding adjustment of the
fundamental parameters.
Operating mode
Operating modes "Auto" (Automatic), "Manual" and
"OFF" are available. You can specify the way in which
your room heating and water heating are controlled
using the operating modes (see operating instructions
Section 4.3.2, Table 4.2).
Parameter
Parameters are the properties of your heating system.
You can influence these properties by altering the value
of a parameter, such as, e.g. reducing the value of the
parameter "Set-back Temperature" from 15 °C to 12 °C.
Set-back temperature
The set-back temperature is the temperature to which
your heating lowers the internal temperature to outside
the programmed time windows.
Summer/Winter changeover
In the screen 1 "Basic Data" in the menu point "Mode
selection" you can determine whether the changeover
from summer to winter should take place automatically
(Selection: Auto).
The factory setting (as-supplied condition) is for
automatic changeover not to take place (Selection: Off).
Target room temperature
The target room temperature is the temperature that
you would like in your apartment and which is specified
in your controller. Your boiler continues to provide heat
until the internal temperature is equal to the target
room temperature.
When entering the time programmes, the target room
temperature is also referred to as the comfort
temperature.
Target values
Target values are the desired values which you specify
to the controller. e. g. the target room temperature or
the target temperature for the hot water preparation.
Time window
For the heating, the hot water generation and the
circulation pump three time windows per day can be
programmed (see operating instructions Section 4.7.1).
A target value is allocated to each time window
programmed for the heating.
The programmed time windows for hot water generation
refer to the hot water target value (see screen 10 "hot
water parameter")
In the case of the circulation pump the time windows
determine the operating times.
In automatic mode the control is in accordance with the
specified values in the time windows.