Installation; Installation Requirements - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

5 Installation

▶
Always remove only one side section –
never both side sections at the same time.
▶
Remove the side section as shown in the illustration.
5 Installation
Danger!
Risk of scalding and/or risk of material
damage due to incorrect installation lead-
ing to escaping water.
Stresses in supply lines can cause leaks.
▶
Install the supply lines without tension.
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 due to corrosion.
If non-diffusion-tight plastic pipes are used
in the heating installation, this may cause
air to enter the heating water and corrosion
of the heat generation circuit and the heat
generator.
▶
If using non-diffusion-tight plastic pipes
in the heating installation, partition the
system by installing an external heat ex-
changer between the heat generator and
the heating installation.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶
Do not solder the connection pieces if
the connection pieces are screwed to the
service valves.
14
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 liquid gas
Using the incorrect type of liquid gas may cause fault shut-
downs in the product. Ignition and combustion noise may
occur in the product.
▶
Only use the gases listed on the identification plate.
5.1.4 Required preliminary work
1. Install a stop cock in the gas line.
2. Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
3. Check that the volumetric capacity of the expansion
vessel is sufficient for the system volume.
Conditions: The volume of the installed expansion vessel is insufficient
▶
Install an additional expansion vessel, connected as
close to the product as possible, in the heating return.
Conditions: External expansion vessel installed
▶
Install a non-return valve in the product outlet (heating
flow) or decommission the internal expansion vessel
in order to prevent the warm start function from being
increasingly activated due to backflow.
4. Install a tundish with siphon for the condensate dis-
charge and the exhaust pipe on the expansion relief
valve. Lay as short a drain line as possible, at a down-
ward gradient away from the tundish.
5. Insulate bare pipes exposed to environmental influ-
ences to protect them from frost using suitable insu-
lating material.
Installation and maintenance instructions ecoTEC plus 0020209593_01