Viessmann VITOCAL 300-G Operating Instructions Manual page 58

Appendix
Terminology
(cont.)
Standard room temperature
Set the standard room temperature
when you are in the house during the day
(see page 20).
Room temperature-dependent heat-
ing or cooling mode
With room temperature-dependent oper-
ation a room will be heated or cooled
until the selected set room temperature
has been reached. For this, a separate
temperature sensor must be installed in
a room.
The heating output or cooling capacity
are regulated independently of the out-
side temperature.
Reduced heating mode
When you are out or during the night, you
can heat the rooms with the reduced
room temperature (setback mode). Set
the time periods using the time program
for heating/cooling. With underfloor
heating systems, energy savings are
insignificant in reduced heating mode
(see page 9).
In reduced mode, cooling is disabled.
Reduced room temperature
When you are out or during the night, set
a reduced room temperature (see
page 20). See also "Reduced heating
mode".
58
Safety valve
Safety device that must be installed by
your heating contractor in the cold water
pipe. The safety valve opens automati-
cally to prevent excess pressure in the
DHW cylinder.
The heating circuits and the solar circuit
are also equipped with safety valves.
Secondary pump
The secondary pump transports the
heating water from the heat pump into
the heating system and, in heating sys-
tems with heating water buffer cylinder,
initially into the buffer cylinder.
Solar circuit pump
In conjunction with solar thermal sys-
tems.
The solar circuit pump transports the
cooled heat transfer medium from the
DHW cylinder indirect coil to the collec-
tors.
Set temperature
Default temperature that should be
reached by heating or cooling, e.g. set
DHW temperature.
Cylinder primary pump
Circulation pump for heating the DHW in
the DHW cylinder.