Vaillant VA 6-050 MXNHDI, Installation Manual, Page: 18 / 41

Multi Split Type Installation Manual
17 EN
10.3 Recommended Installation Process
It is recommended carrying out the installation in the
following order:
• Installation of the condensed water pipe.
• Installation of the coolant pipes.
• Installation of the fresh air and bypass lines.
• Electrical installation.
• Indoor unit assembly in the ceiling.
• Connections.
• Checking for leaks and starting the unit.
• Assembly of the decorative panel.
10.4 Installation of the Condensed Water Pipe
10.4.1 Handling the Condensed Water Pipe
Warning!
Danger of breakdowns or malfunction. Danger of
incorrect drainage of the condensed water and
wear of materials due to dripping water.
Take the following points into consideration:
- Ensure that air circulates through the
condensed water pipe in order to guarantee
that the water can be freely released.
Otherwise, the condensed water could leak
through the indoor unit body.
- Mount the pipe without bending it in order to
avoid blockage.
- If the water pipe is channelled outdoors,
ensure that it is insulated against freezing.
- If the condensed water pipe is installed in a
room, fit thermal insulation.
- Avoid installing the condensed water pipe with
an ascending bend.
- Avoid installing the condensed water pipe with
it free end submerged in water.
- Avoid installing the condensed water pipe with
crimping.
- Install the condensed water pipe in such a way
that the distance of its free end from the floor
is at least 5 cm.
-
Install the condensed water pipe in such a way
that its free end is kept away from unpleasant
odours to ensure that they do not penetrate
the room.
10.4.2 Laying of the Condensed Water Pipe
Note!
The indoor unit is fitted with a condensed water
removal pump.
Note!
Use a pipe whose diameter is at least the same
as the diameter of the indoor unit connection
(polyethylene pipe: inner diameter 25 mm, outer
diameter 32 mm).
• Plan the layout of the condensed water pipe taking
into account the indications in section 10.4.1.
- Ensure that the pipe is as short as possible.
- Ensure that the minimum inclination from the indoor
unit is at least 1%.
• Mount the pipe supports taking into account the
distances and inclinations indicated in figure 10.1.
Fig. 10.1 Installation diagram of the Pipe for the Drainage of
the Condensed Water.
Legend
1 Pump flange (jacketing)
A Distance with regard to the indoor unit (maximum 200 mm)
B Distance between supports (maximum 1 - 1.50 m)
C Pipe inclination (minimum 1%)
H Maximum height of the pipe with regard to the pump (maximum
500 mm)
• Mount the condensed water pipe in its supports.
- Prevent the pipe from bulging to guarantee the
correct removal of the water.
• Insulate the pipe with thermal insulation.
Installation of the Cassette Indoor Unit 10