Smart Grid - Viessmann Vitotronic 200 Operating Instructions Manual

Utilising excess power
Further information can be found in chapter
"Terminology" in the appendix.
If your contractor has connected and activated Smart
Grid, operation of the heat pump will be matched to the
available amount of power in the grid (grid utilisation).
Not a lot of power in the grid (grid overload)
Your power supply utility can block your heat pump.
During this power-OFF period, central heating is provi-
ded by the heating water buffer cylinder. If no heating
water buffer cylinder is installed or its temperature is
too low, the rooms are heated using the available aux-
iliary heaters, e.g. oil boiler, electric booster heater.
DHW can only be heated during the power-OFF period
using the auxiliary heaters.
Large amount of excess power (power is free)
Your power supply utility switches your heat pump on
directly.
DHW, the heating water buffer cylinder and the heating
circuits are automatically heated to the max. possible
temperatures.
Small amount of excess power (power is cheap)
The heat pump runs in standard operation with modi-
fied set temperatures.
You can increase these set temperatures for the fol-
lowing functions or reduce them for cooling:
Function Set temperature
Increase
DHW heating
"DHW cylinder "Set DHW cyl.
heating" increase"
Heating the heating water buffer cylinder
"Heating htg "Set htg water
water buff cyl" buffer in-
crease"
Central heating
"Raise room "Set room
temperature" temp. in-
crease"
Central cooling
"Room temper-
—
ature cooling"
1. Extended menu:

2. "Smart Grid"

3. Select the required function, e.g. "DHW cylinder
4. Set the required temperature increase or tempera-
5. If required, repeat steps 3 to 4 for further functions.
Note
If you enable several functions for the utilisation of
excess power, the functions for DHW heating will have
priority over the functions for central heating.
Setback
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 simultaneously, the func-
tion with the largest temperature increase or reduction
is used: see page 46.
—
—
"Set room temp.
reduction"
heating"
ture reduction. E.g. 10 Kelvin (10 K) for "Set DHW
cyl. increase" to increase the set temperature for
the standard DHW temperature from 50 °C to
60 °C.
Set DHW cyl. increase
10.0 K
Change with
Fig. 30
Smart Grid
+
47