Establishing Operational Readiness; Reading The Temperature Or Pressure Display; Preparing The Heating Water; Filling And Purging The Heating Installation - Vaillant ECOTEC PLUS VU 80 Installation And Maintenance Instructions Manual

9

Establishing operational readiness

The Vaillant ecoTEC plus boiler is fitted with a digital infor-
mation and analysis system (DIA). If additional settings are
required, which have not been configured using the installa-
tion assistant, you can view and modify further parameters
using the DIA.
The operating concept and operation of the boiler are
described in the ¬ Operating instructions of the boiler. The
read-off and setting facilities of the operator level are also
described in the ¬ Operating instructions.
9.1 Reading the temperature or pressure
display
Left-hand button
temperature
Right-hand button
temperature/water pressure

9.1 Reading the temperature or pressure display

The boiler is fitted with an analogue pressure gauge and
also has a symbolic bargraph display for the fill pressure of
the heating installation and a digital pressure and tempera-
ture display.
You can see the pressure gauge once you have removed
the front casing of the boiler.
ecoTEC plus installation and maintenance instructions 0020134823_01
: Hot water handling ¬ Cylinder
: Heating mode ¬ Heating
50
Establishing operational readiness
Press the right-hand selection button twice to read off the
digital filling pressure value.
9.2

Preparing the heating water

Observe the specifications concerning heating water prepa-
ration in (¬ section 2.4.5).
9.3

Filling and purging the heating installation

Caution.
b
Risk of material damage caused by con-
taminated lines!
Foreign bodies, such as welding remnants,
sealing residue or dirt in the water pipes,
may cause damage to the boiler. It is rec-
ommended that you use a dirt trap on older
systems upstream of the ecoTEC plus.
> Thoroughly flush newly installed part of
the heating installation prior to start-up.
The system is filled via a filling connection installed on-site,
which must be fitted at a suitable location in the heating
circuit. This connection must be removed again after the
filling process is complete. If the local water authority does
not permit temporary connections you must use a closed
system filling pump with an interrupt vessel. Automatic fill-
ing of the heating system does not take place from the hot
water side. (Alternative procedures for filling closed sys-
tems are described in BS 5449).
To ensure the correct operation of the heating installation,
the indicator on the pressure gauge must point to the
upper half of the grey area or in the middle of the bar
graph display (marked by the dashed limit value) when the
heating installation is cold. This corresponds to the filling
pressure between the minimum and maximum recom-
mended pressure. You can also display the exact filling
pressure.
> Flush the newly installed part of the heating installation
thoroughly before filling it.
> Open all thermostatic radiator valves in the heating
installation.
> Select check programme P.6 (¬ section 11.4).
The check programme starts, the burner and pump are
switched off (to fill or drain the boiler).
9.3.1 Filling the heating installation
> Connect a hose between a cold water valve and the fill-
ing line of the heating system.
> In order to fill the heating installation, first open the cold
water valve.
> Open all thermostatic radiator valves.
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