Time ("Cold") - Vaillant ecoTEC plus 806 VU GB 806/5-5 Installation And Maintenance Instructions Manual

18. If there is still too much air in the heating installation at
the end of the check programme P.00, restart the check
programme.
19. Check all connections and the entire system for leak-
tightness.
7.12 Flushing the heating installation for the first

time ("cold")

Note
The complete heating system must be flushed
at least twice: Once with cold water and once
with hot water in accordance with the following
instructions.
1. Check whether all thermostatic radiator valves and both
service valves on the product are open.
2. Connect a hose to the drain valve that is located at the
lowest position in the heating system.
3. Open the radiator valves and the drain valves so that
the water can drain quickly. Start at the next point in the
system and open the purging valves on the radiators so
that the contaminated water can completely drain.
4. Close the drain cocks.
5. Refill the heating system with water.
6. Check that the expansion relief valve of the heating
system is functioning correctly by turning the handle
on the valve.
7. Check the pressure in the heating system and top up
with water if necessary.
8. Close the filling valve and the cold water valve.
7.13 Filling the condensate trap
Danger!
Risk of poisoning due to escaping flue
gas.
An empty or insufficiently filled condensate
trap may allow flue gas to escape into the
room air.
▶
Fill the condensate trap with water before
starting up the product.
0020134823_04 ecoTEC plus Installation and maintenance instructions
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2
1. Remove the lower section of the condensate trap(2) by
unscrewing it from the condensate trap (1).
2. Fill the lower section of the condensate trap with water
up to about 10 mm below the upper edge.
3. Secure the lower section of the condensate trap cor-
rectly to the condensate trap again.
7.14 Checking and adjusting the gas ratio
setting
7.14.1 Checking the factory setting
Caution.
An incorrect gas group setting may cause
operating faults or a reduction in the
working life of the product.
If the product design does not match the local
gas group, malfunctions will occur or you will
have to replace product components prema-
turely.
▶
Before you start up the product, compare
the gas group information on the identific-
ation plate with the gas group available at
the installation site.
The product's combustion has been factory tested and is
preset for operation with the gas group indicated on the iden-
tification plate.
Conditions: The product design is not compatible with the local gas
group
If you want to operate the product with liquid gas, do not start
up the product.
A gas conversion must only be carried out by Vaillant Cus-
tomer Service or the manufacturer of the product.
▶
Notify Vaillant Customer Service or the manufacturer of
the product that you want a gas conversion carried out.
Start-up 7
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