Installation Of The Indoor Unit Body; Installation Of The Outdoor Unit; Planning The Refrigerant Return; Selecting The Assembly Location - Vaillant VAI 3-025 WN Manual Del Usuario

INSTALLATION
9.3.6

Installation of the indoor unit body

• Check that the installation has been carried out correctly and
that there are no leaks (see section 12.1).
• Securely hang the indoor unit body onto the upper notches of
the mounting plate. Briefly move the body from side to side
to verify that it is secure.
• Lift the body up slightly from underneath, press it onto the
mounting plate and then lower it vertically. The body will fit
into the lower supports on the mounting plate.
• Check that the indoor unit is properly secured.
• In the event that the body does not slot into the supports
properly, repeat this process.
• Do not use excessive force as this may damage the fixing
lugs, ensure that the pipework is not trapped behind the unit.

10 Installation of the outdoor unit

10.1

Selecting the assembly location

WARNING!
a
Outdoor units must be placed in accessible areas
for subsequent maintenance and repair operations.
Vaillant will not be responsible for any costs derived
from incorrect positioning that prevents easy access.
DANGER of personal injury and material damage
e
from explosion!
Danger of burns and eye injuries.
When brazing or soldering pipe lines, use suitable
protection equipment (protective eye protection and
mask, welding gloves, flame proof clothing).
DANGER of personal injury and material damage
e
from collapse!:
Ensure that the ground is smooth and level and can
withstand the weight of the outdoor unit.
WARNING!
a
Danger of corrosion.
Do not install the unit near to corrosive materials:
- The outdoor unit can only be mounted outdoors, never inside
a building.
- Do not install the unit in such a way that the air discharge
affects the air inlets of other nearby equipment.
- If possible avoid direct sunlight.
- Ensure that the ground has sufficient rigidity to avoid
vibrations.
- Ensure that there is sufficient space to observe the minimum
distances (see Figure 8.1).
- Ensure that neighbours are not disturbed by draughts or
noise.
- If the premises are rented obtain the owner's consent.
- 14 -
- Comply with local regulations: there are considerable
differences dependant on the area.
- Leave enough space to fit the condensed water drainage
pipe (see section 10.4).
10.2

Planning the refrigerant return

The refrigerant circuit contains a special oil to lubricate the
outdoor unit compressor. To assist the return of the oil to the
compressor the following is recommended:
- that the indoor unit is located higher than the outdoor unit
and,
- that the suction pipe (the thickest one) is assembled with a
gentle slope towards the compressor.
If the outdoor unit is mounted higher than the indoor unit, the
suction pipe must be mounted in a vertical position. At heights
exceeding 7.5 m (where this is permissible):
- every 7.5 m additionally install an oil trap in which the oil can
be collected and vacuumed back to the outdoor unit, and
-
install an elbow in front of the outdoor unit to facilitate the
return of the lubricant.
10.3

Connection of the refrigerant pipes

NOTE:
i
Installation is easier if the gas suction pipe is
connected up first. The suction pipe is the thickest one.
• Mount the outdoor unit in the required position.
• Remove the flare nuts and bonnets from the shut off in the
outdoor unit.
• Carefully bend the installed pipe towards the outdoor unit.
WARNING!
a
Danger of breakdowns or malfunction.
Danger of damage in the refrigerant pipes.
Bend the pipe carefully to prevent kinks or breaks.
• Cut the pipes, leaving enough extra piping hanging over to
enable the unit to be connected at the outdoor unit joins.
• Flare the refrigerant pipe after first placing the flare nut on
the pipe.
• Join the refrigerant pipes to the corresponding outdoor unit
connection.
• Insulate the refrigerant piping correctly and separately. To
do so, cover any joins in the insulation with masking tape
or insulate any bare coolant piping with the corresponding
insulation material suitable for Air to Air heat pumps.
VAI3-WN-I_EN - 07/14 - Vaillant