Switching Comfort Mode On And Off; Switching Off The Product's Functions; Guaranteeing The Correct Filling Pressure Of The Heating System - Vaillant ecoFIT sustain 835 Operating Instructions Manual

4 Operation
4.10 Switching Comfort mode on
and off
Note
Comfort mode immediately sup-
plies hot water at the required tem-
perature, without you having to
wait for the water to heat up.
1. Press ( ).
2. Press (
◁
Comf. on or Comf. off are shown
flashing in the display.
3. Activate or deactivate Comfort mode
by pressing or
4. Press to confirm this change.
◁
When you have activated Comfort
mode, the symbol appears in the
basic display. When you have deac-
tivated Comfort mode, the " " sym-
bol goes out in the basic display.
4.11 Switching off the product's
functions
4.11.1 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 tem-
perature 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.
12
).
.
.
4.12 Guaranteeing the correct
filling pressure of the heating
system
4.12.1 Checking the filling pressure
of the heating installation
Note
To ensure that the heating installa-
tion operates smoothly, the filling
pressure when the heating install-
ation 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 compet-
ent person for details.
In addition, the
after approx. 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 pressure.
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.
1 / 2
System pressure: 0.10 ... 0.20 MPa
(1.00 ... 2.00 bar)
The filling pressure is in the intended
pressure range.
2 / 2
Filling pressure: < 0.08 MPa
(< 0.80 bar)
Operating instructions ecoFIT sustain 0020230530_01
symbol appears