Connecting The Heating Flow And Heating Return; Gas Connection; Connecting The Condensate Drain Pipework - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

5 Installation
▶
If using non-diffusion-tight plastic pipes
in the heating installation, separate the
system by installing an external heat ex-
changer between the boiler and the heat-
ing 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.
Caution.
Risk of damage caused by incorrect gas
installation.
Excess test pressure or operating pressure
may cause damage to the gas valve.
▶
Check the leak-tightness of the gas valve
using a maximum pressure of 1.1 kPa
(110 mbar).
▶
Flush the heating installation thoroughly prior to installa-
tion.
▶
Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
▶
Install the following components:
–
Drain cocks at the lowest points of the heating install-
ation
–
A heating pump in the heating flow
–
A bypass that is at least 1.5 m away from the product
–
A stop cock in the gas line
5.2 Connecting the heating flow and heating
return
1
1 Heating return connec-
tion
1. Establish the heating connections in accordance with
the applicable standards.
2. Purge the gas line before start-up.
3. Check whether the connections (→ Page 16) are leak-
tight.
10
2
2 Heating flow connection
5.3

Gas connection

1
1. Establish the gas connection (1) in accordance with the
applicable standards.
2. Purge the gas line before start-up.
3. Check whether the connections (→ Page 16) are leak-
tight.
5.4

Connecting the condensate drain pipework

1
2
▶
Follow the instructions listed here and observe directives
and local regulations on condensate discharge.
▶
Use PVC or another material that is suitable for draining
the non-neutralised condensate.
▶
If it cannot be guaranteed that the materials the drain
lines are made from are suitable, install a system for
neutralising the condensate.
▶
Ensure that the connection between the condensate
drain pipework and the drain hose is not air-tight.
Note
The condensate drain pipework must have a
continuous fall (45 mm per metre) and should
whenever possible terminate at a suitable
drain point within the heated envelope of the
building that will remain frost free under long
periods of low external temperatures.
▶
During installation remove all burs from inside of cut pipe
work and avoid excessive adhesive which may trap small
pockets of water close to the pipe wall which can freeze
and build into a larger ice plug.
Installation and maintenance instructions ecoTEC plus 0020200871_00