Vaillant ecoTEC VU Betriebsanleitung PDF herunterladen (Seite 15)

Operation

Operating instructions ecoTEC plus 0020116701_00 15

Proceed as follows to fill the heating system:

> Open all radiator valves (thermostatic radiator valves) of

the heating system.

> Connect the filling cock for the heating system, as

explained by your approved competent person, to a cold

water draw-off valve.

> Open the filling cock slowly.

> Fill it with water using the draw-off valve until the

required filling pressure is reached in the display.

> Close the draw-off valve.

> Bleed all the radiators.

> Then check the filling pressure on the display.

> Fill with more water if required.

> Close the filling cock.

> Remove the connection between the filling cock and the

draw-off valve.

> Return to the basic display.

5.2 Setting the heating flow temperature

5.2.1 Setting the heating flow temperature

without a controller connected

Target flow temp.

Back

5.5 Setting the heating flow temperature

If no external controller is connected to the boiler, set the

heating flow temperature according to the respective out-

side temperature as follows:

> Press the right-hand selection button

").

The value of the heating flow temperature appears in the

display.

> Use the minus button

or the plus button

to change the heating flow temperature.

> Confirm the change by pressing the right-hand selection

button

("OK").

The heating flow temperature is factory-set for tempera-

tures up to 75°C.

If higher (or lower) values can be set on your boiler, this

means that your approved competent person has calibrated

your unit to adjust the maximum temperature to your heat-

ing system.

5.2.2 Using a controller to set the heating flow

temperature

If your boiler has a weather compensator or a room ther-

mostat control system, you must make the following set-

tings:

> Set the maximum heating flow temperature on the boiler

(¬Section 5.2.1).

The actual heating flow temperature is automatically

adjusted by the controller (for information about this, see

the controller operating instructions).

5.3 Hot water production with VUW boilers

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 tem-

peratures are greater than 60°C. Young

children and the elderly can even be at dan-

ger at lower temperatures.

> Select the temperature so that nobody is

at risk.

Danger!

Possible danger to life from legionella!

If the boiler 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.

Caution!

Risk of damage caused by calcification.

If the water hardness is greater than

3.57 mol/m

(= 357 mg/l CaCO

), there is a

risk of calcification.

> Set the water temperature to a maximum

of 50°C.

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