Connecting The Condensate Drain Pipework; Installing The Discharge Pipe On The Expansion Relief Valve; Connecting The Flexible Hose To The Expansion Relief Valve On The Shift-Load Cylinder - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

5 Installation
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.
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
16
1
2
3
Gulley Soakaway
Installation and maintenance instructions ecoTEC plus 0020209593_01
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.
5.7 Installing the discharge pipe on the
expansion relief valve
1. Install the discharge pipe for the expansion relief valve
so that it does not interfere with the removal and fitting
of the lower section of the condensate trap.
2. Install the discharge pipe as shown (do not shorten).
3. Make sure that the end of the pipe is visible.
4. Ensure that discharged water or steam cannot cause
injury to persons or damage to electronic components.
5. Ensure the discharge pipe work is installed, routed and
terminated correctly to minimise the risk of freezing up.
5.8 Connecting the flexible hose to the
expansion relief valve on the shift-load
cylinder
Danger!
Risk of scalding!
Heating water that leaks from the drain of
the expansion relief valve may cause severe
burns.
▶
Install the expansion relief valve drain to a
professional standard.
▶
Use the flexible hose that is included in
the scope of delivery.