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Installation and maintenance manual ecoTEC
5.4.2 ecoTEC plus filling device (800 series)
The ecoTEC plus appliance from the 800 series will be
delivered with a filling device.
3
1
2
4
Fig. 5.2 Filling device ecoTEC plus (800 series)
• Insert the double check valve (
1
) of the filling pipe at
the cold water shutoff valve and secure the double
check valve with the spring clip (
2
).
• To fill, first open the stop valve (
3
).
• Open the stop valve (
4
), so that water flows into the
heating system. Fill the heating system as described in
Section 5.4.4.
• Close both stop valves after filling and detach the fill-
ing device by pulling the double check valve from the
cold water stop valve.
Note
Both stop valves must be closed while operat-
ing the heating system and the filling pipe must
be again detached at the double check valve.
Fig. 5.3 Double check valve detached while heating
5.4.3 Filling the heating system in ecoTEC pro and
ecoTEC plus (600 series)
The ecoTEC pro appliances and the ecoTEC plus appli-
ances from the 600 series do not come with a filling
device. In these appliances, water is filled in the heating
system through a filling pipe provided onsite.
• Join a hose between a cold water dispensing valve and
the filling pipe of the heating system.
• To fill, first open the cold water dispensing valve.
• Open the stop valve on the filling pipe, so that water
flows into the heating system. Fill the heating system
as described in Section 5.4.4.
• After filling, close the stop valve on the filling pipe and
the cold water dispensing valve and remove the filling
hose.
5.4.4 Filling the heating system for the first time
Note
As long as there is insufficient water pressure
in the heating system, the display indicator
changes between the error message F.22 and
the actual pressure indicator when the appli-
ance is on.
Fill the heating system as follows:
• Open all heating element thermostat valves.
• Check if both stop cocks on the heater are open.
• Only in ecoTEC plus (800 series): Connect the filling
pipe as described in Section 5.4.2.
• Only in ecoTEC plus (800 series) and in ecoTEC pro:
As described in Section 5.4.3 join a hose between the
cold water dispensing valve and the filling pipe of the
heating system.
• Open the cold water dispensing valve.
• Slowly open the filling valve and let the water flow into
the heating system. Ventilate the lowest heating ele-
ment until the water flows out at the vent valve with-
out bubbles.
• Ventilate all other heating elements until the heating
Commissioning Part I 5
