Operating instructions

14
Operating instructions ecoTEC plus 0020124810_FT1b
4.4.2 Setting the heating flow temperature
with a controller
If your gas-fired wall-hung boiler has a room thermostat
control system or weather compensator, make the
following settings:
> Press the on/off switch to switch on the boiler.
> Set the maximum heating flow temperature
(¬ section 4.4.1).
The flow temperature is automatically adjusted by the
controller (for information see the controller operating
instructions).
4.5 Hot water production with VUW units
4.5.1 Setting the hot water temperature
a
Danger!
Risk of being scalded by hot water!
There is a danger of scalding at the hot water
draw-off points if the hot water temperatures
are greater than 60 °C. Young children and
the elderly can even be at danger at lower
temperatures.
> Select the temperature so that nobody
is at risk.
a
Danger!
Possible danger to life from legionella!
If the unit is used to reheat water in a solar-
based drinking water heating system, note the
following:
> Set the minimum hot water temperature
to 60 °C.
b
Caution!
Material damage due to calcification.
If the water hardness is more than
-3.57
mol/m
3
(20 °dH), there is a risk
of calcification.
> Set the maximum water temperature
to 50 °C.
1
2
4
3
Fig. 4.7 Setting the hot water temperature
> Press the on/off switch (1) to switch on the boiler.
> Set the hot water temperature by pressing the
following sequence of keys:
"Operating mode" selection button
--> "Next"
The hot water temperature is shown on the display.
> Change the hot water temperature with the "Scroll
down" (3) or "Scroll up" (4) arrow keys.
> Confirm the changes by pressing the "OK" selection
button (2).
The new hot water temperature is now set.
> Press the "Next" or "Back" selection button until you
have reached the desired level or the basic display.
If you do not press any buttons for more than
15 minutes, the display returns to the basic display.
If your controller is connected to the boiler via a two-
wire eBUS cable, then you can set the hot water target
temperature on the controller.
Ask your approved heating engineer whether or not
your controller is connected via a two-wire eBUS cable.
If your controller is connected via a two-wire eBUS:
> Set the hot water temperature on the boiler
to the maximum possible temperature.
> Set the desired hot water temperature
(hot water target temperature) on your controller.
4.5.2 Activating/deactivating comfort mode
Comfort mode immediately supplies you with hot water
at the required temperature, without you having to wait
for the water to heat up. To do this, the hot water heat
exchanger of the ecoTEC plus is kept at your selected
temperature level.
4 Operation