Hot Water Production With Vu Units; Setting The Hot Water Temperature; Setting A Room Thermostat Or Weather Compensator - Vaillant ecoTEC plus Operating Instructions Manual

4.6

Hot water production with VU units

4.6.1

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 temperatures are
greater than 60 °C. Young children and
elderly persons can be at risk at lower
temperatures.
> Select the temperature so that nobody
is at risk.
a
Danger!
Possible danger to life from legionella
formation.
In domestic hot water cylinders there is a risk
of legionella forming, which can causes
illness.
> If the unit is used for post-heating within a
solar-supported drinking water heating
installation, set the hot water outlet
temperature to at least 60 °C.
b
Caution!
Material damage due to calcification.
If the water hardness is more than
-3.57 mol/m 3
of calcification.
> Set the maximum water temperature
to 50 °C.
To produce hot water in conjunction with the VU unit
type a VIH-type domestic hot water cylinder must be
connected to the boiler.
2
3
4
Fig. 4.9 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" (2) selection button --> "Next"
Operating instructions ecoTEC plus 0020124810_FT1b
(20 °dH), there is a risk
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.
4.7 Setting a room thermostat or weather
compensator
1
1
Fig. 4.10 Setting a room thermostat or weather compensator
> Set the room thermostat, weather compensator (1)
and thermostatic radiator valves (2) as specified in
the operating instructions for these accessories.
Operation 4
2
17