Filling And Bleeding From The Heating Side - Vaillant ecotec plus Installation And Maintenance Instructions Manual

Provided the national regulations and technical stand-
ards do not stipulate more stringent requirements, the
following applies:
• You must condition the heating water in the following
cases:
- If the entire filling and supplementary water quanti-
ty during the operating life of the system exceeds
three times the nominal volume of the heating in-
stallation or
- If the limit values shown in the tables are not ob-
served.
Overall hardness at smallest boiler heating
Total heating
output
20 l/kW
mol/m
kW
(mg/l CaCO
No require-
ment or
< 50
1)
< 3
< (300)
2
> 50 to £ 200
(200)
1.5
>200 to £ 600
(150)
0.02
> 600
(2.0)
1) on systems with circulation water heaters and for systems with
electric heating elements
2) from the specific system volume (nominal capacity in litres/heating
output; for multiple boiler systems, the lowest individual heating
output should be used). This data only applies up to 3 times the
system volume for filling and top-up water. If 3 times the system
volume figure is exceeded, the water must be treated in exactly
the same way as if the limits quoted in table 6.1 were exceeded
(softening, desalination, hardness stabilisation or desludging).
Table 6.1 Guideline values for heating water: water hardness

6.2.2 Filling and bleeding from the heating side

2
Fig. 6.1 Check the filling pressure of the heating installation
Installation and maintenance instructions ecoTEC plus 0020214490_00
2)
surface
> 20 l/kW
> 50 l/kW
< 50 l/kW
3 3
mol/m mol/m
) (mg/l CaCO ) (mg/l CaCO
3 3
2
(200) (2.0)
1)
1.5
(150) (2.0)
0.02
(2.0) (2.0)
0.02
(2.0) (2.0)
Caution!
a
Only fill the system via the boilers' built-in
combined filling and emptying valve as
otherwise problems may occur with bleeding
the system.
Note!
h
The ecoTEC is equipped with a pressure gauge
(1) and a digital pressure indicator. You can
display the precise filling pressure when the
boiler is switched on by pushing the "-" button
(2). You can also switch between the continuous
display of temperature or pressure by keeping
the "-" button pushed for about 5 seconds.
For the heating installation to work properly the
3
indicator on the pressure gauge (1) must be in the upper
)
3 half of the dark grey area when the system is cold (see
Fig. 6.1). This corresponds to a filling pressure between
0.02
1.0 and 2.0 bar.
If the heating installation serves several floors, the
values for the water pressure in the system may need to
0.02
be higher (to avoid the ingress of air).
• Flush through the heating installation throroughly
0.02
before actually filling it.
0.02
1
Fig. 6.2 Automatic air vent
• Unfasten the cap on the automatic air vent (1) by one
or two turns (the appliance is bled automatically while
continuously operated via the automatic air vent).
• Open all thermostatic radiator valves in the
installation.
• Connect the system's combined filling and emptying
valve to a cold water draw-off valve in accordance with
the standards.
h Note!
To avoid damaging the appliance through
1
operation with insufficient water pressure, the
boiler is equipped with a pressure sensor.
This sensor records a lack of pressure if the
pressure value falls below 0.6 bar and the
detected pressure value flashes in the display.
If the pressure falls below 0.3 bar the boiler
switches off. Fault message F.22 ("water lack")
Start-up 6
25