15
Operating manual ecoTEC 0020052777_00
a
Caution!
Inappropriate alterations can cause damage!
If your gas-fired boiler still does not start after
the third attempt to suppress the fault, consult
a recognised expert technician company or
Vaillant Service Solutions for advice.
4.7.3 Faults in the air/flue gas routing
The appliances are fitted with a blower. If the blower
does not work properly, the appliance will switch itself
off.
The
and
symbols as well as the error message
"
F.32
" appear in the display.
a
Caution!
Inappropriate alterations can cause damage!
If this error message appears consult a recog-
nised expert technician company for advice.
4.7.4 Feeding the device/heating system
The filling pressure must be between 1.0 and 2.0 bar
when the system is cold in order for the heating instal-
lation to operate properly (see Chapter 4.2.2). If the
pressure is less, top up the system with water.
If the heating system extends over several floors, the
system may require a higher filling pressure. Ask your
engineer for details.
a
Caution!
Risk of damage to the gas-fired wall-mounted
boiler!
Use only clean tap-water to fill the heating sys-
tem.
The addition of chemicals such as e.g. frost and
corrosion prevention materials (inhibitors) is
not permitted.
Otherwise it could result in damage to seals
and diaphragms as well as noises during the
heating operation.
Vaillant assumes no liability for this and such
consequential damages.
To fill up and to re-fill the heating system, you can nor-
mally use tap water. However in exceptions, the water
quality might not be suitable for filling in the heating
system (heavily corrosive or extremely calciferous
water). In these kind of situations contact your recog-
nised expert technician company.
1
2
3
Fig. 4.14 Filling the heating installation
Proceed as follows to fill the system:
• Open all radiator valves (thermostat valves) of the
system.
• Connect the filling tap of the installation to a cold
water draw-off valve with a hose (your heating engi-
neer should have shown you the filling fittings and ex-
plained the filling and draining of the system).
• Open the filling cock slowly.
• Slowly turn the draw-off valve on and top up the sys-
tem with water until the required pressure is shown at
the pressure gauge (
1
) or in the display (
3
).
You can call up the precise value for the pressure in the
display.
• Activate the pressure display by pressing the "
-
" but-
ton (
2
). After 5 seconds the display returns to the
feed temperature. You can also switch between the
continuous display of temperature or pressure by
keeping the "
-
" button pressed for roughly 5 seconds.
• Turn the tap off.
• Bleed all the radiators.
• Then check the installation pressure at the pressure
gauge or display and add more water if necessary.
• Close the filling cock and remove the filling hose.
Operation 4