Vaillant VRC 630 Operating Manual Download

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Glossary

Operating manual VRC 630 0020095108_00

Glossary

Circulation pump

When you turn on 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 turn on the tap. Time windows can be pro-
grammed for the circulation pump.

Cursor

The cursor

marks the parameter to be changed.

Cylinder charging

Cylinder charging means that the water contained in the
cylinder is being heated to the desired hot water tempe-
rature.

DCF receiver

A DCF receiver receives a time signal. The time signal
sets the time automatically and provides automatic
switching between summer time and winter time.

eBUS

The eBUS communications protocol simplifies the cont-
rol-related coupling of various system components
within a heating system. It provides particular flexibility
for retrofitting and expanding the system. The installa-
tion of additional boilers or the retrospective incorpora-
tion of components such as solar hot water generation
is thus simplified. The eBUS provides extended possibili-
ties for connecting external controllers and also for con-
necting to the vrnetDIALOG Internet communications
system for remote servicing and diagnostics.

Error message

An error message indicates in plain text that the con-
troller has detected a fault in the heating installation.

Flow temperature

See Heating flow temperature.

Frost protection delay/ Heating frost protection

The heating frost protection function ensures the sys-
tem is protected from frost in the

Off

and

Eco

modes

(outside the time windows) and applies to all connected
heating circuits. To prevent the system from freezing,
the required room temperature is set to the set set-
back value and the heating circuit pump is switched on
if the outside temperature falls below 3 °C. The frost
protection function can be suppressed for a certain
period of time by setting a delay time (setting range of
0 - 23 h).
Furthermore frost protection is activated regardless of
the measured outside temperature if it is established
that the measured room temperature is lower than the
set night set back temperature with a connected remote
control device.

Heating circuit

A heating circuit is a closed circulation system of pipes
and heat consumers (e.g. radiators). The heated water
from the boiler flows into the heating circuit and returns
to the boiler as cooled water.
A heating installation usually has at least one heating
circuit. However additional heating circuits can be con-
nected, e.g. to supply several apartments or additional
underfloor heating.

Heating curve

The flow temperature in heating installations, calculated
as a function of the outside temperature, is known as
the heating curve. The flow temperature in the heating
circuit gets warmer the lower the outside temperature
becomes.

Heating flow temperature

Your appliance heats water which is then pumped
through your heating system. The temperature of this
hot water as it leaves the boiler is referred to as the
flow temperature.

Heating installation

The heating installation heats up the apartment and
produces hot water.

Heating pump

A heating pump in a heating installation is a centrifugal
pump which conveys the heated heating water to the
radiators and house service connection stations and at
the same time feeds back the cooled water from the
return pipes so that the boiler can heat it up again.

HK1

HK1 is the standard name (default setting) for heating
circuit 1 of your heating installation. You can change
this name.

Hot water generation

Your boiler heats the water in the DHW cylinder to the
selected target cylinder temperature. If the temperature
in the DHW cylinder falls by a specified amount, the
water is heated up again to the target cylinder tempera-
ture. You can programme time windows for heating up
the cylinder contents.

Installer level

The Installer level displays the specific parameters that
the expert technician can set/change. This level is reser-
ved for the heating engineer and is therefore protected
by an access code.

Legionella

Legionella are water-borne bacteria which can quickly
propagate and cause serious lung diseases. They occur
wherever heated water provides the optimum condi-
tions for multiplication. Temporarily heating the water
to above 65 °C kills off the legionella.