Bedienungsanleitung Viessmann VITOTRONIC 200 (Seite 90 von 112) (Englisch)

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Energy fed into the grid (power supply utility):

■The electricity meter shows the output without a plus/

minus sign in front of it.

Functions for the utilisation of power generated on

site

Enable one or more functions for the utilisation of

power generated on site. The functions that can be uti-

lised depend on the appliance type.

If you enable several functions for the utilisation of

power generated on site, the functions for DHW heat-

ing will have priority over the functions for central heat-

ing.

To utilise the power generated on site, you can raise

the set temperature for some functions or lower it for

cooling.

Possible functions for the utilisation of power gener-

ated on site:

■DHW heating

■Heating the heating water buffer cylinder

■Central heating

■Central cooling

It is a condition for the utilisation of power generated

on site that the relevant operating program for central

heating, central cooling or DHW heating is set. E.g. the

operating program "Heating and DHW" or "Only

DHW" must be set for DHW heating.

Example: utilisation of power generated on site for

DHW heating

If sufficient power from the photovoltaic system is

available, the heat pump will be operated for DHW

heating using this power.

In the time program you have set the time phases dur-

ing which DHW heating is enabled. In order to use as

much of the power generated by the PV system as

possible, DHW heating may also be switched on out-

side the set time phases.

In order to make more effective use of power gener-

ated on site, set an increase for the DHW temperature.

■Standard DHW temperature:

50 °C

■Increase the DHW temperature when utilising power

generated on site:

10 K (10 Kelvin)

The DHW is heated to 60 °C. If DHW consumption is

the same, the next DHW heating period using power

from the grid is postponed until later.

Note

■In parallel to the utilisation of power generated on

site, a percentage of power can be drawn from the

grid for operating the heat pump: e.g. if the amount

of power generated on site is insufficient to drive the

circulation pump. Your contractor can set the level of

this percentage.

■Only for air/water heat pumps (not all types):

To raise and lower the set temperatures, your con-

tractor can implement a setting that will automatically

match the compressor output to the amount of power

generated by the photovoltaic system. This prevents

power for operating the heat pump being drawn from

the grid.

Utilisation of power generated on site and utilisa-

tion of excess power from the grid (Smart Grid)

If the utilisation of power generated on site and Smart

Grid are enabled and active, the function with the larg-

est temperature increase or reduction applies.

Electric booster heater

If the required room temperature or DHW temperature

cannot be achieved with the heat pump alone, an elec-

tric booster heater (if installed) can be activated.

Examples of electric booster heaters:

■Instantaneous heating water heater:

–For central heating and/or DHW heating

–Integrated into the heat pump or into the flow of

your heating system

■Immersion heater:

–For DHW heating

–Integrated into the DHW cylinder

Note

■Constant operation of an electric booster heater

results in high electricity consumption.

■You can set a time program for the electric booster

heater.

Enthalpy heat exchanger

In ventilation units with heat recovery, the cooler sup-

ply air is preheated with the heat from the extract air in

the integral heat exchanger. For this, neither air stream

comes into direct contact with the other.

Appendix

Terminology (cont.)

5817913

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