Connecting The Domestic Hot Water Cylinder; Connecting The Heating Flow And Heating Return; Connecting The Condensate Drain Pipework - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

5 Installation
5.4

Connecting the domestic hot water cylinder

Applicability: Product with heating mode only
▶
When connecting the domestic hot water cylinder, follow
the Installation instructions for the domestic hot water
cylinder.
5.5 Connecting the heating flow and heating
return
▶
Make the heating connections as shown in accordance
with the relevant standards.
5.6

Connecting the condensate drain pipework

Danger!
Risk of death from escaping flue gases!
The condensate drain pipework for the si-
phon must not be connected tightly to waste-
water piping because, otherwise, the internal
condensate trap may be drained fully and flue
gas may escape.
▶
Do not connect the condensate drain
pipework tightly to the waste-water pip-
ing.
16
min.
180
Internal Internal
stackpipe discharge system
The product is equipped with a condensate trap (2). (The
filling height is 145 mm). The condensate trap collects the
condensate that has formed in a vessel with a capacity of
approximately 200 ml, and intermittently releases the con-
tents into the discharge pipe. This minimises the risk of the
discharge pipe freezing.
▶
Connect the condensate discharge (1) to condensate
drain pipework (3) which has a minimum internal dia-
meter of 19 mm (22 mm outside diameter for all external
pipes) and is made from an acid-resistant material (e.g.
plastic overflow pipe).
–
The condensate discharge pipework must have
a continuous fall (45 mm per metre) and should
whenever possible terminate at a suitable discharge
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.
▶
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.
▶
Ensure that the condensate drain pipework terminates in
a suitable location. Further information can be obtained
from BS 6798 Specification for installation of gas–fired
boilers of rated input not exceeding 70 kW net.
▶
Leave an installation space of at least 180 mm beneath
the condensate trap.
Installation and maintenance instructions ecoTEC plus 0020209591_01
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Gulley Soakaway