Vaillant ecoTEC plus SERIES Operating Instructions Manual - page 32
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Operating instructions ecoTEC plus 0020124810_FT1b
Glossary
Glossary
Air/exhaust gas pipework
The air/exhaust gas pipework consists of all components
that route combustion air to the boiler or exhaust gas
from the boiler.
Burner
The burner on a condensing boiler is the component in
which the gas/air mix is control-burnt.
Calorific value
Unlike the heating value, the calorific value of a fuel
describes the total useable heat during combustion,
based on the quantity of fuel used, including the
condensation heat in the steam. Condensing boilers use
this additional condensation heat to achieve much high
efficiency levels than conventional boilers.
Controller
The controller is the interface to the boiler and can be
used to adjust the room temperature, hot water
temperature, heating times or night-time temperature
reduction.
A distinction is made between room thermostat, weather
compensator and solar controller.
Cylinder charging
Cylinder charging refers to the process for heating up
the cylinder.
See also hot water production.
Dew point
The dew point is the temperature at which steam turns
to liquid (condensation). The steam in the exhaust fumes
from the boiler contains thermal energy, which can be
released by condensation. In gas-fired and oil-fired
boilers using calorific values, the exhaust gases are
cooled so that the steam condenses and the heat that it
contains can be output into the heating system.
eBUS
The abbreviation eBUS is short for energyBUS.
The eBUS is a special cable system used in the heating
technology field, which is used for communication
between the heating technology components (e.g.
controller, boiler, vrnetDIALOG).
Frost protection
The frost protection function protects your heating
system and apartment from frost damage. If the heating
flow temperature falls below 5 °C when the main switch
is on, the boiler comes into operation and heats the heat
generation circuit to approx. 30 °C.
Heating flow 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 heating flow
temperature.
Hot water production VU units
Your boiler heats the water in the domestic hot water
cylinder to the selected target temperature. If the
temperature in the DHW cylinder falls by specific
amount, the water is heated up again to the target
temperature.
Hot water production VUW units
The hot water is supplied directly from the VUW unit.
Comfort mode immediately supplies you with hot water
at the required temperature, without you having to wait
for the water to heat up. For this, the hot water heat
exchanger is kept at a preselected temperature level.