Installation 7
0020300875_01 Energy
7
Installation and maintenance instructions
23
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 connectors if the connectors
are not yet screwed to the service valves.
Note
Apply heat insulation to the water pipes to the
boiler outlet and to the installation.
Preliminary work
1. Check that the system volume and the volumetric capa-
city of the expansion vessel are compatible.
▽
If the volume of the expansion vessel is insufficient
for the installation.
▶
Install an additional expansion vessel in the heat-
ing return, as close to the product as possible.
▶
Install a non-return valve at the product's outlet
(heating flow).
2. Ensure that the installation has the following compon-
ents:
Working materials
A cold-water stopcock for the unit
A gas stopcock for the unit
A filling/draining device in the heating installation
1
2
3
4
5
1
Heating flow connec-
tion, G3/4
2
Domestic hot water
connection, G3/4
3
Gas connection, G1/2
4
Connection for the cold
water pipe, G3/4
5
Heating return connec-
tion, G3/4
1.
Connect the water and gas connections in accordance
with the applicable standards.
2.
Purge the gas pipe before start-up.
3.
Check whether the connections (
Page 33) are leak-
tight.
7.6
Connecting the drain pipework for the
expansion relief valve
1
▶
Ensure that the pipeline is visible.
▶
The pipe must have a continuous fall and be routed to a
position so that any discharge of water, possibly boiling,
or steam cannot create any danger to persons, damage
to property or external electrical components and wiring.
◁
The piping must be installed in such a way that you
can see when water drips out.