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Installation
Handling and lifting
Units have been designed to be lifted from above by means of eyebolts and holes in the base members.
Use retractor bars to keep the lifting wires or chains away from the unit.
Lifting procedures provided with the unit have to be respected.
CAUTION!
Do not use forklift trucks to lift the unit from below. If equipment for lifting from above is not available, using rollers may
move the unit.
Foundations
No special foundations are required, provided that the supporting surface is flat and level, and can withstand the weight
of the unit.
Clearances
Open spaces around the unit must be provided for in order to allow for the passage of necessary airflow and in order to
allow normal maintenance to be carried out (as shown product catalogs).
In the case where two units have to be installed side by side, the distance must be doubled.
Precautions for dominant winds
Avoid obstacles on suction and discharge sides of the units. Respect the safety distances as shown on the units
dimensional drawings.
In case of presence of dominant winds in the installation area it is strictly necessary to avoid (for units with horizontal flow
fans) that such winds blow in front of the unit (fans discharge side). In case of unit with vertical flow fans it is strictly
necessary to avoid installations where the dominant winds could cause rejected hot air to come back to the condensing
coils.
Precautions against the direct sunshine
Direct solar radiation can raise the temperature of condensation until it causes the unit shutdown or failure start-up of the
same by action of the high pressure switch.
Precautions against the presence of fireplaces and exhaust heat
Avoid installation of the machines downwind of chimneys, smokestacks and effluent discharges different.
Precautions against the presence of foliage and foreign bodies
Avoid installing the unit in the immediate vicinity of plants that can prevent proper intake and discharge air.
Control of compressor fastening
The compressors are fitted on shock absorbers. To fix spring antivibration mounts, it is necessary to remove blockages
to fasten the compressors, as indicated on the label on compressors body.
After the unit has reached the final position, fix the antivibration bolts.
In order to reduce the transmission of vibrations to the supporting structures, fit shock absorbers in every fastening point.
Rubber shock absorbers are recommended for units installed on the ground, spring shock absorbers for units installed on
roofs.
Electrical connections
Electrical power supply
The mains power supply characteristics have to match the unit's absorption. The mains power supply tension must
correspond to the nominal value ± 10%, with a maximum difference between the phases of 3%.
Power connections
Protect the unit electric box power supply circuit with protection devices (not included in the supplied equipment)
Connect the line terminals with a three-core cable of a section, which is appropriate to the machine absorption.
The switch and the fuses like all the power connections must comply with the regulations in force.
Unbalance between the supply tension phases
Do not run the electrical motors when the voltage unbalance between the phases is more than 3%.
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