Split Type Installation Manual
14
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):
• Additional oil traps must be installed at each 7.5M
interval
10.3 Connection of the Refrigerant Pipes
Note!
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
!
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 conditioning.
10.4 Connection of the Condensate Drain Pipe to
Outdoor Unit
Note!
Applicable only to heat pump units.
Whilst the unit is running with the heat pump function,
condensation forms in the outdoor unit and has to be
drained.
• Insert the elbow included in the supply in the hole
provided at the bottom of the outdoor unit and turn it
90º to fix it (see Figure 10.2).
Fig. 10.2 Assembly of the drainage elbow for condensed water
Legend
1 Outdoor Unit
2 Drainage elbow
3 Drainage hose
• 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 a collection tray located at the bottom
of the outdoor unit.
• Protect the condensate water hose with thermal
insulation to avoid freezing.
10 Installation of the outdoor unit
