Vaillant ecoCOMPACT VCC4 Series, Installation And Maintenance Instructions Manual

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5 Installation
14
Installation and maintenance instructions ecoCOMPACT 0020181421_04
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.
Note
In order to keep heat losses to a minimum, we re-
commend that you provide the water pipe spigots
to the floor-standing boiler outlet and to the install-
ation with heat insulation.
1. 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 installation, install an additional expansion
vessel, connected as close to the product as pos-
sible, in the heating return.
2. Install an expansion relief valve and a stopcock on the
heating return.
3. Install a domestic hot water safety group and a stop-
cock on the cold water pipe.
4. Install a filling device between the cold water pipe and
the heating flow.
5. Install a stopcock on the heating flow.
6. Install a stopcock on the gas pipe.
7. Blow or flush the supply pipes thoroughly prior to install-
ation.
2
3
4
5
1
1 Gas connection, G3/4
2 Hot water connection,
G3/4
3 Heating return connec-
tion, G3/4
4 Heating flow connec-
tion, G3/4
5 Connection for the cold
water supply line, G3/4
8. Connect the water and gas connections in accordance
with the applicable standards.
–
Loss of pressure between the gas meter and the
product:
≤
1 mbar
9. Purge the gas pipe before start-up.
10. Check whether the connections (
→
Page 26) are leak-
tight.
11. Water can escape from the expansion relief valve. You
should therefore ensure that the drain hose opposite
the outdoor air remains open.
12. Actuate the drainage device on the expansion relief
valve regularly in order to remove any scale deposition
and ensure that the device is not blocked.
5.3.1 Checking the gas line for leak-tightness
▶
Check the entire gas line properly for leak-tightness.
5.4 Connecting the condensate discharge pipe
Danger!
Risk of death from escaping flue gases!
The siphon's condensate drain pipework
must not be connected to waste-water piping
because, otherwise, the internal condensate
siphon may be drained fully and flue gas may
escape.
▶
Do not connect the condensate drain
pipework tightly to the waste-water pip-
ing.
Note
Follow the instructions listed here and observe
directives and local regulations on condensed
water discharge.