Installation 5
0020209591_01 ecoTEC plus Installation and maintenance instructions 15
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.
5.2 Installing the gas connection
1. Install the gas line in accordance with the recognised
rules of technology.
2. Connect the product to the gas line as shown in ac-
cordance with the recognised rules of good engineering
practice.
3. Remove the residues from the gas line by blowing
through the gas line beforehand.
4. Purge the gas line before start-up.
5. Check the gas line for leak-tightness.
5.3 Installing the hot and cold water connection
Applicability: Product with integrated hot water generation
1. Make the water connections as shown in accordance
with the relevant standards.
2. Ensure correct water pressure and flow requirements
and that any expansion can be accommodated with the
cold supply pipe work.
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