Checking Leak-Tightness - Vaillant ecoTEC plus 806 VU GB 806/5-5 Installation And Maintenance Instructions Manual

7 Start-up
Conditions: The CO₂ content must be adjusted
Caution.
Risk of poisoning due to an incorrectly
installed gas valve.
If the gas flow pressure is outside the per-
missible ranges in the table, this may lead to
personal injury and material damage.
▶
Check the integrity of all gas lines.
▶
Check the flue gas guiding for leaks.
▶
Check the gas flow pressure.
▶
Check the connection value.
▶
Break through the sealing sticker.
▶
Set the CO₂ content (value with front casing removed)
by turning the screw (1).
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.
24
806/5-5
▶
Select (Cancel) once the adjustments have been made.
▶
If an adjustment is not possible in the specified adjust-
ment range, you must not start up the product.
▶
1
If this is the case, inform Vaillant Customer Service.
▶
Install the front casing. (→ Page 10)
7.15

Checking leak-tightness

1
▶
Check the gas line, the heating circuit and the hot water
circuit for leak-tightness.
▶
Check the flue gas pipe for correct installation.
1006/5-5
1206/5-5
7.15.1 Checking the heating mode
1. Make sure that there is a heat requirement.
2. Call up the Live Monitor.
– Menu → Live Monitor
◁
If the product is working correctly, the display shows
S.04.
7.15.2 Checking the hot water generation
Conditions: Cylinder connected
▶
Make sure that the cylinder thermostat is requesting
heat.
1. Call up the Live Monitor.
– Menu → Live Monitor
◁
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.
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).
7.16 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.
Installation and maintenance instructions ecoTEC plus 0020134823_04
Note
On the VU GB 1006/5-5 and the VU GB
1206/5-5, after changing the direction of
rotation, the CO₂ content only changes
after approx. 1 turn of the adjusting screw
(overcoming the adjustment hysteresis).
The adjusting screw must protrude only
slightly from the casing.