Connecting The Drain Pipework For The Expansion Relief Valve; Connecting The Condensate Discharge Pipe - Vaillant ecoFIT sustain 615 Installation And Maintenance Instructions Manual

5.3 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.
5.4

Connecting the condensate discharge pipe

1
2
▶
Follow the instructions listed here and observe the legal
and local regulations on condensate discharge.
▶
Use PVC or any other material that is suitable for drain-
ing the non-neutralised condensate.
▶
If you cannot guarantee that the materials from which the
drain pipework is made are suitable, install a system for
neutralising 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 traps (1). Use the supplied drain
hose (2) for this.
▶
Connect a condensate discharge pipe (21.5 mm, not
included in the scope of delivery) to the drain hose (2).
▶
During installation remove all burrs 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.
0020277252_00 ecoFIT sustain Installation and maintenance instructions
▶
For any installation the condensate must be free flowing
and not be possible for air back-pressure to prevent wa-
ter flow.
▶
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 specification "BS 6798"
for installing and maintaining gas-fired boilers with a nominal
heat input below 70 kW.
5.4.1 Condensate drainage systems
5.4.1.1 Internal soil and vent pipe
5.4.1.2 External soil and vent pipe
L = 3m max
5.4.1.3 External termination into a gulley or hopper
L = 3m max
Installation 5
Ø19mm
min
Ø19mm
min
Ø30mm
Ø19mm
min
Ø30mm
11