17
EN
Cod. 3541T090 - Rev. 00 - 06/2019
INSTALLATION
■ Prepare a water drainage channel around the foundation, to drain waste water
from around the unit.
■ If water does not easily drain from the unit, mount the unit on a foundation of
concrete blocks, etc. (the height of the foundation should be about 100 mm.
■ If you install the unit on a frame, please install a waterproof plate (about 100
mm) on the underside of the unit to prevent water from coming in from the low side.
■ When installing the unit in a place frequently exposed to snow, pay special
attention to elevate the foundation as high as possible.
■ In heavy snowfall areas it is very important to select an installation site where
the snow will not affect the unit. If lateral snowfall is possible, make sure that the
heat exchanger coil is not affected by the snow (if necessary construct a lateral
canopy).
■ As the outdoor temperature is measured via the outdoor unit air thermistor,
make sure to install the outdoor unit in the shade, or a canopy should be con-
stracted to avoid direct sunlight, so that it is not influenced by the sun’s heat,
otherwise protection may be possible to the unit.
■ Check the strength and level of the installation ground so that the unit will not
cause any operating vibration or noise after installation.
■ In accordance with the foundation drawing in the figure, fix the unit securely by
means of the foundation bolts. (Prepare four sets each of Ø10 Expansion bolts,
nuts and washers which are readily available on the market.)
■ It is best to screw in the foundation bolts until their length is 20 mm from the
foundation surface.
fig. 19 -
When installing the unit in a place exposed to strong wind, pay special attention
to the following.
Set the outlet side at a right angle to the direction of the wind.
Strong winds of >5 m/s or more blowing against the unit’s air outlet causes a short
circuit (suction of discharge air), and this may have the following consequences:
- Deterioration of the operational capacity.
- Frequent frost acceleration in heating operation.
- Disruption of operation due to rise of high pressure.
- When a strong wind blows continuously on the front of the unit, the fan can start
rotating very fast until it breaks.
6.4 Installation diagrams
L’installazione può essere eseguita o con unità interna posta sopra l’unità esterna
o viceversa.
Outdoor unit positioned at the bottom and indoor unit at the top
In this case a trap (6) must be made on the intake piping (3) to halt the downflow of
refrigerant and to avoid liquid returning to the compressor. The relative connection
pipes
must be insulated.
Key:
1. Outdoor unit
2. Indoor unit
3. Piping on gas side (larger diameter)
4. Piping on liquid side
5. Trap
fig. 20 -
Outdoor unit positioned at the top and indoor unit at the bottom
In this case, traps (6) must be installed on the suction piping (3), every three me-
ters of difference in level. These traps will allow the oil to return to the compressor.
The relative connection pipes must be insulated.
Key:
1. Outdoor unit
2. Indoor unit
3. Piping on gas side (larger diameter)
4. Piping on liquid side
5. Trap
☞
N.B.:The maximum difference in level between the indoor unit and outdoor
unit must not exceed the values given in the “LIMITS TO THE LENGTH AND
HEIGHT DIFFERENCE OF REFRIGERANT PIPES” section.
fig. 21 -
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