Terminology - Viessmann VITOLIGNO 300-C Operating Instructions Manual

Terminology

Setback mode (reduced heating mode)
See "Reduced heating mode".
Extension kit for heating circuit with mixer
Assembly (accessories) for controlling a heating circuit
with mixer.
See "Mixer".
Heating circuit
A heating circuit is a sealed unvented circuit that con-
nects the boiler and radiators, in which the heating
water circulates.
A heating system may comprise several heating cir-
cuits. For example, one heating circuit for the rooms
occupied by you and one heating circuit for the rooms
of a separate apartment.
Heating circuit pump
Circulation pump for the circulation of heating water in
the heating circuit.
Actual temperature
Current temperature at the time of the scan; e.g. actual
DHW temperature.
Mixer
A mixer mixes the water heated in the boiler with the
cooled water returning from the heating circuit. The
water, thus brought to the right temperature, is pumped
to the heating circuit by the heating circuit pump. The
control unit adjusts the heating circuit flow temperature
via the mixer to suit different conditions, for example
when outside temperatures change.
Night setback
See "Reduced heating mode".
Standard heating mode
For periods when you will be at home during the day,
use standard heating mode to heat your interior. Set
the periods using the time program for central heating.
During these periods, the interior is heated to the
standard room temperature.
Standard room temperature
For periods when you will be at home during the day,
select the standard room temperature.
Open flue operation
The combustion air is drawn from the room where the
boiler is installed.
Reduced heating mode
For periods when you will be absent or during the
night, heat your rooms in reduced heating mode (set-
back mode). Set the periods using the time program
for central heating. During these periods, the interior is
heated to the reduced room temperature.
Reduced room temperature
For periods when you will be absent or during the
night, select the reduced room temperature. See also
"Reduced heating mode".
Safety valve
A safety device that must be installed in the cold water
pipe by your heating contractor. The safety valve
opens automatically to prevent excess pressure in the
DHW cylinder.
Set temperature
Default temperature that should be reached, set DHW
temperature for example.
Drinking water filter
A device that removes solids from potable water. The
drinking water filter is installed in the cold water pipe
upstream of the DHW cylinder or the instantaneous
water heater.
Weather-compensated mode
In weather-compensated mode, the heating flow tem-
perature is regulated according to the outside tempera-
ture. This means that no more heat is generated than
is actually required to heat the interior to the set room
temperature you selected.
The outside temperature is captured and transmitted to
the control unit by a sensor fitted outside the building.
Appendix
47