Vaillant ecoCRAFT exclusive VKK GB 1206/3-E R1 Installation And Maintenance Instructions Manual page 12

5 Installation
5.3.1 Checking the gas line for leak-tightness
▶
Check the entire gas line properly for leak-tightness.
5.4 Installing hydraulics
1. Install the connections in accordance with the relevant
standards and the generally recognised rules of good
engineering practice.
2. If using non-diffusion-tight plastic pipes in the heating
installation, partition the system by installing an external
heat exchanger between the heat generator and the
heating installation.
3. Only solder connectors if the connectors are not yet
screwed to the service valves in order to avoid dam-
aging the seals.
5.4.1 Connecting the heating flow and heating
return
1
2
1. Between the heating installation and the product, install
the required safety devices and isolators that are to
be set on-site, along with a filling/draining cock in the
return.
2. Connect the heating flow to the heating flow connection
(1).
3. Connect the heating return to the heating return con-
nection (2).
4. Install the heat generator pump that is to be set on-
site and that is not integrated into the gas-fired floor-
standing condensing boiler.
5.4.2 Connecting the domestic hot water cylinder
▶
If required, install a domestic hot water cylinder.
5.5 Connecting the condensate drain pipework
The pH value of the flue gas condensate is between 3.5
and 4.5. The condensate does not contain any inadmissible
heavy metals. The gas-fired floor-standing condensing boiler
is equipped with a condensate collector and a condensate
discharge with siphon. The condensate that is produced dur-
ing the combustion is either guided directly to the drain chan-
nel via the siphon, or it is first neutralised and then guided to
the drain.
▶
Find out from the local water authority whether neutral-
isation is required.
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2
Danger!
Risk of death from escaping flue gases!
The siphon's condensate discharge pipe
must not be connected to waste-water pipe-
work or a tundish because, otherwise, the
internal condensate siphon may be drained
fully and flue gas may escape.
▶
Do not connect the condensate drain
pipework tightly to the waste-water pip-
ing.
▶
Route the condensate discharge pipe for the channel
with a downward gradient using a suitable plastic or
stainless steel pipe to the nearest waste-water outlet,
minimum cross-section of DN 25.
▶
If an extension of the on-site condensate discharge pipe
is required, use only condensate-resistant drain pipes.
▶
Route the condensate discharge pipe (2) from the gas-
fired floor-standing condensing boiler via a DN 25 plastic
pipe. The discharge point must remain visible.
▶
Before starting up the product, fill the condensate siphon
(1) with water through the flue gas opening in the flue gas
collector.
▶
Check whether the condensate has been discharged
correctly.
5.6 Installing and connecting the flue pipe
5.6.1 Air/flue system, system-certified, setting up
1. You can find out which air/flue pipes may be used by
consulting the enclosed air/flue system set-up instruc-
tions.
2. Install the flue pipe using the installation manual.
Installation and maintenance instructions ecoCRAFT exclusive 0020149561_01
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