fiac AIRBLOK 40, Use And Maintenance Manual, Page: 14 / 68

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4 INSTALLATION
4 Installation
In order to use the compressor in complete safety read the safety standards given
in section 1.3. before reading this section.
4.1 Admitted surrounding conditions
Position the machine as established when the order was placed. Failing this the Manufacturer is not liable
for any inconveniences that may possibly arise.
For SD versions, the cleanliness of the surrounding area is of extreme importance, as the
compressor is equipped with suction filters on the electric fan of the electric control panel.
Unless pointed out otherwise when placing the order, the compressor must work regularly in the
surrounding conditions indicated below:
ROOM TEMPERATURE
The room temperature must not be lower than 5°C or higher than 45°C to ensure the ideal operational
efficiency of the compressor.
If the compressor works at a room temperature lower than the minimum value, the condensate could be
separated within the circuit and therefore the water would mix with the oil, thus deteriorating the quality of
the latter, failing to guarantee the even formation of the lubricating film between the moving parts with the
possibility of seizure.
If the compressor works at a room temperature higher than maximum value, the compressor would take
in air that is too hot, which would prevent the heat exchanger from adequately cooling the oil in the circuit,
raising the working temperature of the machine, thus causing the thermal safety device to trip, which stops
the compressor due to an excessive temperature of the air/oil mixture at the screw outlet.
The inverter dissipator could overheat, causing it to stop (for
SD versions).
The maximum temperature of the room is to be measured while the compressor is running.
LIGHTING
The compressor has been designed in compliance with legal prescriptions and in the attempt to minimise
shadow zones to facilitate the operator’s job.
The lighting system of the factory is to be considered as crucial for the operator’s safety.
The room in which the compressor is installed must have no shadow zones, dazzling lights or stroboscopic
effects due to the lighting.
ATMOSPHERE WITH RISK OF EXPLOSION AND/OR FIRE
The standard compressor is not pre-arranged or designed to work in rooms subject to the risk of explosion
or fire. The performance of the compressor may decrease at the maximum permitted ambient temperature,
with relative humidity higher than 80% and at an altitude of more than 1,000 mt.
For
SD versions, the maximum relative humidity at all altitudes is 95% without condensation.
4.2 Space required for maintenance
The compressor must be installed in a large room that is well-aired, dust-free and sheltered away from rain
and frost. The compressor takes in a large amount of air that is required to ventilate it internally. A dusty
atmosphere would in time cause damages and inefficient performance.
Part of the dust once inside is taken in by the air filter causing it to clog rapidly and another part of dust will
settle on the components and will be blown against the cooling radiator, consequently compromising the
efficiency of the heat exchanger. It is therefore obvious that the cleanliness of the area in which the
compressor is installed is crucial for the correct efficiency of the machine, avoiding excessive running and
maintenance costs. To facilitate maintenance jobs and to create a favourable circulation of air, the
compressor must have a sufficient free space all around it (see fig.).
The room must be provided with outlets that lead outdoors near the floor and ceiling that will allow the natural
circulation of air. If this is impossible, some fans or extractors must be fitted to ensure an air flow rate 20%
higher than the cooling air flow rate. Minimum recommended fan capacity: 2500 m
3 /h.