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ecoTEC exclusive installation and maintenance instructions / 0020017768_02
6 Start-up
6.1 Filling
the
installation
6.1.1
Filling and venting from the heating side
1
Fig. 6.1 Auto air vent
Key
1 Auto air vent
A water pressure/filling pressure between 1.0 and 2.0
bar is required for proper functioning of the boiler.
If the heating installation operates over several floors,
it may be necessary to have higher water levels on the
pressure gauge.
• Rotate the cap of the auto air vent (
1
) on the pump
a couple of times to loosen it (the appliance is
ventilated automatically by the auto air vent during
continuous operation).
• Open all radiator valves in the installation.
bar
bar
1
2
3
4
Fig. 6.2 Check the filling pressure of the heating installation
h
Note!
The ecoTEC units are supplied with a pressure
gauge and a digital pressure display (2). Using
the pressure gauge you can perform a quick
check whether the filling pressure is within the
prescribed range or not, even when the unit is
switched off. With the unit switched on, you
can read off the exact pressure by pushing the
minus button „-“.
• Turn the rotary knobs (
1
) and (
4
) to the left hand stop
and switch the unit on using the main switch (
3
).
h
Note!
Use the test programme P.6 for filling the
heating system: The priority changeover valve
moves to the central position, the heating
pump is not running and the unit does not go
into heating mode, see Chapter 9.2.
h
Note!
To avoid running the system with too little water
and thus to prevent damage, your appliance has
a water pressure sensor. This signals the low
pressure level if the level falls below 0.6 bar by
the water pressure value in the display flashing.
If the water pressure falls below 0.3 bar the unit
switches off. The error message F.22 appears in
the display. Fill the system up with water before
you start up the appliance again.
Filling the heating system:
2
1
Fig. 6.3 Filling the heating system
Proceed as follows to fill the system:
• Open all radiator valves on the system.
• Ensure that the boiler CH service valves are open.
• Check the flexible filling loop is connected.
• Locate the filling valve handle (
1
) and open.
• Locate the filling valve handle (
2
) and open to allow
water to enter the system. Starting with the lowest
radiator, open the radiator air release until water
(clear of bubbles) is emitted.
Start-up 6
