Setting The Hot Water Temperature; Switching Off The Product's Functions; Guaranteeing The Correct Filling Pressure Of The Heating Installation - Vaillant ecoFIT sustain 618 Operating Instructions Manual

4 Operation
4.9

Setting the hot water temperature

Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
▶
Have a competent person inform you
about the measures that should be taken
to protect against Legionella in your in-
stallation.
▶
Do not set any water temperatures below
60 °C without consulting the competent
person first.
1.
Press ( ).
◁
The set hot water temperature flashes in the display.
Conditions: No controller connected
▶
Change the hot water temperature by pressing
.
▶
Confirm by pressing
Conditions: Controller connected
▶
Use to set the maximum possible hot water temper-
ature on the product.
▶
Confirm by pressing
▶
Set the required hot water temperature on the controller
(→ Controller operating instructions).
4.10

Switching off the product's functions

4.10.1 Switching off heating mode (Summer mode)
1. To switch off heating mode without switching off the hot
water generation, press
◁
The value of the heating flow temperature appears
in the display.
2.
Use the button to set the heating flow temperature to
Off.
3.
Confirm by pressing
◁
Heating mode is switched off.
◁
The symbol appears in the display.
8
or
.
.
( ).
.
4.11 Guaranteeing the correct filling pressure of
the heating installation
4.11.1 Checking the filling pressure of the heating
installation
Note
To ensure that the heating installation operates
smoothly, the filling pressure when the heating
installation is cold must be between 0.10 MPa and
0.20 MPa (1.0 bar and 2.0 bar) or lie between the
two dashed lines in the bar graph display.
If the heating installation extends over several
storeys, a higher filling pressure may be required
for the heating installation. Ask a competent per-
son for details.
In addition, the
one minute.
If the filling pressure in the heating installation
falls below 0.05 MPa (0.5 bar), then the product
switches off. The display alternates between the
fault message F.22 and the current filling pres-
sure.
1.
Press twice.
◁
The values for the current filling pressure and for the
minimum and maximum filling pressures appear in
the display.
2. Check the filling pressure in the display.
Result 1:
System pressure: 0.10 ... 0.20 MPa (1.00 ... 2.00 bar)
The filling pressure is in the intended pressure range.
Result 2:
Filling pressure: < 0.08 MPa (< 0.80 bar)
▶
Fill the heating installation. (→ Page 8)
◁
If you have topped up the installation with suf-
ficient heating water, the display automatically
disappears after 20 seconds.
4.11.2 Filling the heating installation
Caution.
Risk of material damage due to heating
water that is extremely calciferous or cor-
rosive or contaminated by chemicals.
Unsuitable tap water damages the seals
and diaphragms, blocks components in the
product and heating installation through
which the water flows and causes noise.
▶
Only fill the heating installation with suit-
able heating water.
1. Ask a competent person where the filling cock is loc-
ated.
2. Connect the filling tap to a heating water supply in the
way you were told by the competent person.
3. Open all radiator valves (thermostatic radiator valves) of
the heating installation.
4. Open the heating water supply.
Operating instructions ecoFIT sustain 0020277253_00
symbol appears after approx.