7 Start-up
24 Installation and maintenance instructions ecoTEC plus 0020209591_01
▶ Close all purging valves.
▶ Monitor the rising filling pressure in the heating installa-
tion.
▶ Fill with water until the required filling pressure is
reached.
▶ After filling, close both stop valves and disconnect the
filling device by removing the double non-return valve
from the cold water stop valve.
Note
Both stop valves must be closed while the
heating system is operating and the filling line
must be removed from the double non-return
valve again.
Conditions: Applies to: Products with heating mode only
▶ Connect the filling and drainage tap in the heating in-
stallation to a heating water supply, if possible with the
cold water valve, in accordance with the relevant stand-
ards.
▶ Open the heating water supply.
▶ Open all radiator valves (thermostatic radiator valves) of
the heating installation.
▶ If necessary, check that both service valves on the
product are open.
▶ Slowly open the filling and drainage tap so that the water
flows into the heating system.
▶ Purge the lowest radiator until water flows out of the
purging valve without bubbles.
▶ Purge all other radiators until the entire heating system
has been filled with water.
▶ Close all purging valves.
▶ Monitor the rising filling pressure in the heating installa-
tion.
▶ Fill with water until the required filling pressure is
reached.
▶ Close the filling and drainage tap and the cold water
valve.
7.12 Purging the heating installation
1. Select the check programme P.00.
◁ The product does not start up, the internal pump
operates intermittently and purges either the heating
circuit or the hot water circuit.
◁ The display shows the filling pressure of the heating
installation.
2. Make sure that the filling pressure of the heating install-
ation does not fall below the minimum filling pressure.
– ≥ 0.08 MPa ( ≥ 0.80 bar)
◁ At the end of the filling procedure, the filling pres-
sure of the heating installation should be at least
0.02 MPa (0.2 bar) above the counter-pressure
of the expansion vessel ("Exp") (P
Installation
≥ P
Exp
+
0.02 MPa (0.2 bar)).
3. If there is still too much air in the heating installation at
the end of the check programme P.00, repeat the check
programme.
7.13 Filling and purging the hot water system
Applicability: Product with integrated hot water generation
1. Open the cold water stop valve on the product.
2. Fill the hot water system by opening all the hot water
draw-off valves until water escapes.
7.14 Filling the condensate trap
1. Remove the lower section from the condensate trap (1).
2. Fill the lower section with water up to 10 mm below the
upper edge.
3. Attach the lower section to the condensate trap.
7.15 Gas ratio setting
7.15.1 Checking the factory-set gas ratio setting
Caution.
Risk of material damage caused by mak-
ing unauthorised settings.
▶ Never modify the factory setting of the gas
pressure regulator of the gas valve.
▶ Before you start up the product, compare the gas group
information on the identification plate with the gas group
available at the installation site.
Conditions: The product design is not compatible with the local gas group
Only Vaillant Service Solutions may perform a gas conver-
sion.
If a gas conversion to liquid gas has been carried out, the
smallest possible partial load is higher than is shown on the
display. The correct values can be found in the Technical
data in the appendix.
▶ Call Vaillant Service Solutions (0330 1003 143).
▶ Do not start up the product.
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