Preparing The Heating Water; Read Off The Filling Pressure; Filling And Purging The Heating Installation; Filling The Heating Installation - Vaillant ecoTEC VU Installation And Maintenance Instructions Manual

10 Commissioning
P.00
1,0 bar
10.1 Boiler in error condition
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If the boiler is in error condition, you cannot
start any test programs. You can detect an error
condition by the fault symbol shown in the left
bottom corner of the display (¬ fig. 10.1). You
must first reset.
10.3

Preparing the heating water

Pay attention to the specifications concerning heating
water preparation in (¬ section 2.4.7).
10.4

Read off the filling pressure

The boiler is equipped with an analogue pressure gauge
(¬ fig. 3.1) and also has a symbolic bar display for the filling
pressure of the heating system and a digital pressure and
temperature display.
You can see the pressure gauge once you have removed
the front casing of the boiler.
Press the right selection button twice to read off the digital
filling pressure value.
10.5

Filling and purging the heating installation

Caution.
b
Risk of damage caused by contaminated
lines.
Foreign bodies such as welding remnants,
sealing residue or dirt in the water pipes
can cause damage to the boiler.
> Flush the heating installation thoroughly
prior to commissioning.
The system is filled via a customer-installed filling connec-
tion, which must be attached in a suitable position in the
heating circuit. This connection must be removed again
after the filling process is complete. If the local Water
Authority regulations do not allow temporary connection a
sealed system filler pump with break tank must be used.
The heating system will not be filled automatically from the
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domestic hot water side. (Alternative methods of filling
sealed systems are given 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 a filling
pressure of between 0.1 MPa and 0.2 MPa (1.0 bar and
2.0 bar).
You can display the exact filling pressure (¬ section 10.4).
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air enter-
ing the heating installation.
> Remove the front casing from the boiler (¬ section 4.7).
10.2 Automatic air vent
> Release the cap of the automatic air vent (1) by up to
two rotations.
> Open all thermostatic radiator valves.
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The ecoTEC pro purges the heating circuit inde-
pendently during continuous operation via the
automatic air vent.
> Only for VUW boilers: Select test program P.06 (¬ sec-
tion 10.2).
The diverter valve moves to the mid-position, the pumps do
not run and the boiler does not switch to heating mode.

10.5.1 Filling the heating installation

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Ensure that the filling and drainage cock on the
heating installation is connected to a cold water
valve as per standard.
Installation and maintenance instructions ecoTEC 0020173113_01
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