Vaillant ecoFIT pure 412 Installation And Maintenance Instructions Manual page 12

5 Installation
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.
▶
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.
5.6.1 Condensate drainage systems
5.6.1.1 Internal soil and vent pipe
5.6.1.2 External soil and vent pipe
L = 3m max
12
Ø19mm
min
Ø19mm
min
Ø30mm
Installation and maintenance instructions ecoFIT pure 0020230535_05
5.6.1.3 External termination into a gulley or hopper
L = 3m max
5.6.1.4 Internal termination into combined sink
waste
5.6.1.5 Internal termination downstream of sink
waste
Ø19mm
min
Ø19mm
min
Ø30mm
Ø19mm
min
Ø30mm
Ø30mm