Gas And Water Connections; Connecting The Condensate Drain Pipework; Installing The Discharge Pipe On The Expansion Relief Valve; Flue Installation - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

5.2

Gas and water connections

4
3
2
1
1 Heating flow connec-
tion, G3/4
2 Hot water connection,
G3/4
3 Gas connection, G1/2
1. Connect the water and gas connections in accordance
with the applicable standards.
2. Purge the gas line before start-up.
3. Check whether the connections (→ Page 22) are leak-
tight.
4. Check the entire gas line properly for leak-tightness.
5.3

Connecting the condensate drain pipework

1
2
▶
Follow the instructions listed here and observe directives
and local regulations on condensed water discharge.
▶
Use PVC or another material that is suitable for draining
the non-neutralised condensed water.
▶
If you cannot guarantee that the materials from which the
condensate discharge pipe is made are suitable, install a
system to neutralise the condensate.
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.
▶
Connect the condensate siphon (1). Use the supplied
condensate drain hose (2) to do this.
0020253094_01 ecoTEC sustain Installation and maintenance instructions
5
4 Connection for the cold
water supply line, G3/4
5 Heating return connec-
tion, G3/4
.
m i n
1 8 0
▶
Connect a condensate discharge pipe (21.5 mm, not in-
cluded in the scope of delivery) to the condensate dis-
charge hose (2).
▶
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.
▶
As with other pipe work insulate the condensate dis-
charge pipe to minimise any risk of freezing and beware
when crossing cavities that the fall is maintained and the
pipe sleeved.
You can find further information in the "BS 6798" specific-
ation for installing and maintaining gas-fired boilers with a
nominal heat load of less than 70 kW.
5.4 Installing the discharge pipe on the
expansion relief valve
1
1. Ensure that the pipeline is visible.
2. Connect the expansion relief valve (1).
3. 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 components must be set up in such a way that
you can see the water flowing out.
5.5

Flue installation

5.5.1 Installing and connecting the flue pipe
1. You can find out which flue pipes may be used by con-
sulting the enclosed flue pipe installation manual.
Conditions: Installation in damp rooms
▶
You must connect the product to a room-sealed air/flue
gas installation. The combustion air must not be taken
from the installation site.
Caution.
Risk of poisoning due to escaping flue
gas.
Mineral-oil-based greases can damage the
seals.
▶
Instead of grease, use only water or com-
mercially available soft soap to aid install-
ation.
2. Install the flue pipe using the installation manual.
Installation 5
13