Installation Requirements - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

5 Installation
Caution.
Risk of material damage due to the gas
leak-tightness test.
At a test pressure of >11 kPa (110 mbar), gas
leak-tightness tests may cause damage to
the gas valve.
▶
If, during gas leak-tightness tests, you
also place the gas lines and the gas valve
in the product under pressure, use a max.
test pressure of 11 kPa (110 mbar).
▶
If you cannot limit the test pressure to
11 kPa (110 mbar), close any gas isolator
cocks that are installed upstream from the
product before you carry out the gas leak-
tightness test.
▶
If, during gas leak-tightness tests, you
have closed the gas isolator cock that is
installed upstream of the product, relieve
the gas line pressure before you open this
gas isolator cock.
Caution.
Risk of material damage caused by corro-
sion
Due to non-diffusion-tight plastic pipes in the
heating installation, air gets into the heating
water. Air in the heating water causes corro-
sion in the heat generator circuit and in the
product.
▶
If you use non-diffusion-tight plastic pipes
in the heating installation, ensure that no
air gets into the heat generator circuit.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶
Only solder connection pieces if the con-
nection pieces are not yet screwed to the
service valves.
Caution.
Risk of material damage caused by
changes to the connected pipes.
▶
Only bend connection pipes if they have
not yet been connected to the product.
12
5.1

Installation requirements

5.1.1 Information on liquid gas operation
In the as-delivered condition, the product is preset for opera-
tion with the gas group indicated on the identification plate.
If you have a product that has been preset for operation with
natural gas, you must convert it to run on liquid gas. You will
need a conversion kit for this. The conversion procedure is
described in the manual supplied with the conversion kit.
5.1.2 Purging the liquid gas tank
If the liquid gas tank is not purged properly, this may result in
ignition problems.
▶
Ensure that the liquid gas tank has been purged properly
before installing the product.
▶
If required, contact the filler or the liquid gas supplier.
5.1.3 Using the correct type of gas
Using the incorrect type of gas may cause fault shutdowns in
the product. Ignition and combustion noise may occur in the
product.
▶
Only use the gas type listed on the identification plate.
5.1.4 Required preliminary work
1. Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
2. Install a system separator (to be provided on-site) dir-
ectly on the cold water connection for the combination
unit.
3. Check that the volumetric capacity of the expansion
vessel is sufficient for the system volume.
▽
If the volume of the expansion vessel is insufficient
for the system.
▶
Install an additional expansion vessel in the
heating return, as close to the product as pos-
sible.
▶
Install a non-return flap at the product's outlet
(heating flow).
4. Ensure that the system has the following components:
–
A cold water stop cock for the unit
–
A gas stopcock for the unit
–
A filling and draining device in the heating installa-
tion
Installation and maintenance instructions ecoTEC sustain 0020253094_01