6 Start-up
22
Installation and maintenance instructions ecoTEC plus 0020214491_01
Settings
Unit
G20 natural
gas
O
₂
after 5 minutes in full load
mode with front casing closed
Vol.
–
%
4.53
±
1.8
Conditions
: The CO
₂
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 CO
₂
content (value with front casing removed)
by turning the screw
(4)
.
Note
Turn to the left: Higher CO
₂
content
Turn to the right: Lower CO
₂
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 CO
₂
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 10)
6.13
Checking leak-tightness
▶
Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
▶
Check that the flue gas pipe has been installed correctly.
6.13.1 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
.
6.13.2 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/m
³
, 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).
6.14
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).
7.
Re-fill the system until the system design pressure of
0,1 MPa (1,0 bar) is attained.
Note
The actual reading on the digital pressure
gauge should ideally be 0,05 MPa (0,5 bar)
plus an additional pressure corresponding
to the highest point of the system above the
base of the boiler
–
10 m head equals an ad-
ditional 1 bar reading on the pressure gauge.
The minimum pressure should not be less
than 0,1 MPa (1 bar) in any installation. If
the system is to be treated with an inhibitor it
should be applied at this stage in accordance
with the manufacturer’s instructions. Further
information can be obtained from Sentinel,
Betz Dearborn Ltd., Tel: 0151 420 9595, or
Fernox, Alpha
–
Fry technologies. Tel: 0870
8700362.
8.
Install the front casing. (
→
Page 10)
