Vaillant VRC 630, Operating Manual

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Installation Instructions VRC 630 0020095108_00
Glossary
Glossary
AT continuous heating
Outside temperature below which heating using the tar-
get room temperature/heating curve assigned to the
heating circuit is continuous outside the programmed
time slot.
A night time reduction or total switch-off no longer
takes place if the temperature reaches or falls below the
set value.
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.
Cylinder charging
Cylinder charging means that the water contained in the
cylinder is being heated to the desired hot water tempe-
rature.
Fast temperature increase
This function is used for mixer heating circuits
a) to allow the mixer to reach its target value at target
boiler temperature shortly before the boiler is swit-
ched on again despite being fully open,
b) to allow, in the event of mixer circuits with a fixed
admixture, the target mixer value (also at target
heater temperature) to be reached during the mor-
ning heating-up operation even though the fixed
admixture reduces the mixer circuit temperature too
far,
c) in order to facilitate an optimum control range for the
operation of the mixer. (Reliable operation is only
possible if the mixer only rarely needs to move to
the "open" stop, thus ensuring a better quality of
control).
For this reason you can set a common boiler tempera-
ture excess for all mixer circuits. This will increase the
current heating circuit target value by the value set.
Floor drying
The floor-drying function is used to “heat dry” a freshly-
laid heating layer according to instructions. All opera-
ting modes, including those selected by telephone, are
interrupted if this function is activated. The flow tempe-
rature of the controlled heating circuit is controlled
according to a pre-set program regardless of the out-
side temperature.
Starting temperature: 25°C
The operating mode is displayed together with the cur-
rent day and the target inlet temperature. The current
day can be set manually.
When the function is started, the current time of the
start is saved. The change of day takes place in each
case
exactly at this time.
After a mains off/on, the floor-drying begins with
the last active day.
Flow temperature
See Heating flow temperature.
Frost protection delay/ Heating frost protection
The heating frost protection function ensures protection
from frost in the
Off and Eco modes (outside the time
slots) in the heating installationand applies to all con-
nected 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 swit-
ched on if the outside temperature falls below 3 °C. The
frost protection function can be suppressed for a cer-
tain 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 set-back temperature with a connected remote cont-
rol 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.