Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual - page 21
Start-up 6
0020029173_04 ecoTEC plus Installation and maintenance instructions
21
1
2
3
4
3.
Measure the CO₂ and CO/CO₂ content at the flue gas
analysis point (1).
4.
Compare the measured value with the corresponding
value in the table.
Settings
Unit
G20 natural
gas
CO₂ after 5 minutes in full load
mode with front casing closed
Vol.–%
9.2 ± 1.0
CO₂ after 5 minutes in full load
mode with front casing removed
Vol.–%
9.0 ± 1.0
Set for Wobbe index W₀
kWh/m³
14.1
O₂ after 5 minutes in full load
mode with front casing closed
Vol.–%
4.53 ± 1.8
CO value with full load
ppm
≤ 250
CO/CO₂
≤ 0.0031
Conditions: The CO₂ content must be adjusted
▶
Unscrew the screw (2) and tilt the air intake pipe (3) for-
wards by 90°. Do not remove the air intake pipe.
▶
Set the CO₂ content (value with front casing removed)
by turning the screw (4).
Note
Turn to the left: Higher CO₂ content
Turn to the right: Lower CO₂ content
▶
Only carry out the adjustment in increments of 1/8 turn
and wait approximately 1 minute after each adjustment
until the value stabilises.
▶
After performing the adjustments, tilt the air intake pipe
back up.
▶
Check the CO₂ content again.
▶
If necessary, repeat the setting process.
▶
Press the
button. Full load mode is also exited if no
buttons are pressed for 15 minutes.
▶
Use the screw (2) to secure the air intake pipe again.
▶
If an adjustment is not possible in the specified adjust-
ment range, you must not start up the product.
▶
If this is the case, inform Vaillant Customer Service.
▶
Install the front casing. (→ Page 11)
6.11
Checking function and leak-tightness
Before you hand the product over to the operator:
▶
Check the gas line, the flue gas installation, the heating
installation and the hot water pipes for leaks.
▶
Check that the air/flue pipe and condensate drain pipe-
work have been installed correctly.
▶
Check that the front casing has been installed correctly.
6.11.1 Checking the heating mode
1.
Make sure that there is a heat requirement.
2.
Press
to activate the status display.
◁
If the product is working correctly, the display shows
S.4.
6.11.2 Checking the hot water generation
Conditions: Cylinder connected
Danger!
Risk of death from Legionella.
Legionella multiply at temperatures below
60 °C.
▶
Ensure that the operator is familiar with
all of the Anti-legionella measures in or-
der to comply with the applicable regula-
tions regarding legionella prevention.
▶
Make sure that the cylinder thermostat is requesting
heat.
1.
Press
to activate the status display.
◁
If the cylinder is charged correctly, the display
shows S.24.
2.
If you have connected a controller which can be used to
set the hot water temperature, set the hot water temper-
ature on the boiler to the maximum possible temperat-
ure.
Conditions: Water hardness: > 3.57 mol/m³, Boiler with cylinder
– Water temperature: ≤ 50 ℃
3.
Adjust the target temperature for the connected do-
mestic hot water cylinder to the controller.
◁
The boiler adopts the set target temperature which
is set on the controller (automatic calibration in
newer controllers).
6.12
Thoroughly flushing the heating installation
("hot")
1.
Operate the appliance until the boiler and the heating
system are up to temperature.
2.
Check the heating system for leaks.
3.
Connect a hose to the drain valve located at the lowest
position of the heating system.
4.
Shut off the boiler, open the drain valve and all purge
valves on the radiators and allow the water to flow out
of the heating system and the boiler quickly and fully.
5.
Close the drain valve.
6.
Fill the heating system again with water as de-
scribed in "Filling and purging the heating installation"
(→ Page 18).