Vaillant ECOTEC PLUS VU 80, Installation And Maintenance Instructions Manual

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Hydraulic installation
20
ecoTEC plus installation and maintenance instructions 0020134823_01
6
Power
Max. pressure
loss (mbar)
<
120 kW 86
in conjunction with the hydraulic cascade
<
240 kW
96
<
360 kW 76
<
480 kW 82
<
600 kW
87
<
720 kW
92
6.2 System separation pressure loss
6.3 Connecting the condensate drain pipework
a
Danger!
Risk of death from escaping flue gases!
An empty or insufficiently filled condensate
siphon may allow flue gases to escape into
the room air.
>
Make sure that the condensate siphon is
filled with water when switching on the
boiler.
a
Danger!
Risk of death from escaping flue gases!
If the condensate drain pipework is con-
nected tightly to a fixed connection on the
waste-water piping, the internal condensate
siphon can be fully drained until empty.
>
Do not connect the condensate drain
pipework tightly to the waste-water
piping.
>
It is recommended that the condensate
is drained into a tundish. The condensate
drain is totally sealed. It may be possible
to empty the trap due to syphonic action
causing leackage of combustion
products:
Condensate forms in the boiler during combustion. The con-
densate drain pipework routes the condensate to the waste
water connection via a tundish.
The boiler is equipped with a condensate siphon. The filling
height is 145 mm. The condensate siphon collects any con-
densate that occurs and feeds it into the condensate drain
pipework.
min.
180
2
3
1
6.3 Condensate siphon
Install the enclosed condensate siphon as follows:
>
Place the condensate siphon on the underside of the
boiler on the condensate drain pipe and secure it using
the retaining clips.
>
Leave an installation space of at least 180 mm beneath
the condensate siphon so that you can clean the conden-
sate siphon in the case of service work.
>
Check the connection for leaks.
>
Check if a neutralising unit is required in accordance
with national regulations.
To connect the condensate drain pipework, proceed as
follows:
>
Hang the condensate drain pipework of the boiler in the
pre-installed tundish.
>
If required, guide the drain hose ( 1 ) of the automatic air
vent into the tundish.
i
The condensate drain pipework connected to the
condensate discharge of the boiler must have a
downward gradient throughout its entire length
(45 mm per metre) and should be installed and
connected
within the building to prevent possi-
ble freezing.
>
The connections for the condensate drain pipework must
not be modified or blocked
>
The condensate drain pipework must terminate in a suit-
able location.
Further information can be obtained from "BS 6798 Specifi-
cation for installation of gas-fired boilers of rated input not
exceeding 70 kW net". Before the boiler is started up, the
condensate siphon (
1 ) must be filled with water as
described in the relevant section.