Planning The Refrigerant Return; Connection Of The Refrigerant Pipes; Connection Of The Condensate Drain Pipe To Outdoor Unit - Vaillant VAM 3-050 W2N Manual De Instalación

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.
- 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.
VAI3-MWN-I_EN - 09/14 - Vaillant
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.
10.4 Connection of the condensate drain pipe
to outdoor unit
Whilst the unit is running in heating mode, condensation forms
in the outdoor unit and this has to be drained away.
• Insert the elbow supplied in the hole provided at the bottom
of the outdoor unit and turn it 90º to fix it (see Figure 10.1).
1
3
Fig. 10.1 Assembly of the drainage elbow for condensed water
Legend
1 Outdoor Unit
2 Drainage hose
3 Drainage elbow
• Mount the drainage hose ensuring that it leaves the
equipment with a downward slope.
• Verify the correct drainage of the water by pouring the water
into the collection tray located at the bottom of the outdoor
unit.
• Protect the condensate water hose with thermal insulation to
avoid freezing.
INSTALLATION
2
EN
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