Electric Booster Heater - Viessmann VITOTRONIC 200 Operating Instructions Manual

Appendix
Terminology
(cont.)
At the next period of demand according to the time
program the required water temperature will then ide-
ally be available, i.e. the heat pump will only need to
reheat a little, if at all.

Electric booster heater

If the required room temperature or DHW temperature
cannot be achieved with the heat pump alone, an elec-
tric booster heater can be activated for reheating (if
installed).
Examples of electric booster heaters:
Instantaneous heating water heater:
■
For central heating and/or DHW heating.
–
Built into the heat pump or the flow of your heating
–
system.
Immersion heater:
■
For DHW heating.
–
Built into the DHW cylinder.
–
Power-OFF
Your power supply utility can block the heat pump
power supply at times of high demand for electricity.
During such times, "Power-OFF" will be displayed.
The heat pump restarts automatically with the selected
operating program as soon as the power supply utility
restores the power supply.
Underfloor heating
Underfloor heating systems are slow, low temperature
heating systems and only respond very slowly to short
term temperature changes.
Quieter operation
A fan is an integral part of air source heat pumps. You
can reduce the speed of this fan using the time pro-
gram. This helps to reduce the air noise emissions
from the fan, for example at night.
Heating mode/cooling mode
Standard heating mode/cooling mode
During the periods in which you are at home during the
day, you heat or cool your rooms to the standard room
temperature. These periods (time phases) are speci-
fied by you, using the time program for heating/cooling.
58
Note
Constant operation of an electric booster heater
■
results in high electricity consumption.
You can set a time program for the electric booster
■
heater.
If your heating system is equipped with a heating water
buffer cylinder, your rooms can still be heated during
power-OFF times.
Therefore, heating to the reduced room temperature at
night and enabling "Economy mode" during short
absences do not result in significant energy savings.
Note
The reduced fan speed also reduces the available
heating output. If necessary, the compressor output is
raised in order to compensate for this loss of output.
The latter case will slightly reduce the seasonal per-
formance factor.
Reduced heating mode
During the periods in which you are out or during the
night, you heat the rooms to the reduced room temper-
ature. These periods are specified by you, using the
time program for heating/cooling. With underfloor heat-
ing systems, reduced heating mode only yields limited
energy savings (see "Underfloor heating system").