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 largest diameter 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 usually easier if the gas suction
pipe is connected up first. The suction pipe is the
larger diameter one.
• Mount the outdoor unit in the required position.
• Remove the flare nuts and bonnets from the shut off
in the outdoor unit. Discard the bonnets as they are no
longer required.
• Carefully bend the installed pipe towards the outdoor
unit using a bending tool or bending spring (not
supplied).
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 valve conections.
• 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 joints 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
Whilst the unit is running in heating mode, condensation
forms in the outdoor unit and has to be drained away.
• Insert the supplied elbow connection into the hole
provided at the bottom of the outdoor unit and turn it
90º to fix it (see Figure 10.1).
Fig. 10.2 Assembly of the drainage elbow for condensed water
Legend
1 Outdoor Unit
2 Drainage elbow
3 Drainage hose (not supplied)
• Mount the drainage hose ensuring that it leaves the
unit with a downward slope.
• Verify the correct drainage removal 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
