FRIULAIR AMD 3-168, Руководство пользователя по техническому обслуживанию и запасным частям

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5.4. REFRIGERATING COMPRESSOR
The refrigerating compressor is the pump of the system where the gas coming from the evaporator (low
pressure side) is compressed up to the condensation pressure (high pressure side). All the compressors
used are manufactured by primary companies and are designed for applications where high compression
ratios and wide temperature changes are present.
The fully sealed construction is perfectly gas tight, so ensuring high-energy efficiency and long useful life.
The pumping unit is supported by dumping springs, in order to consistently reduce the acoustic emission
and the vibration diffusion. The electric motor is cooled down by the aspirated refrigerating gas, which goes
through the coils before reaching the compression cylinders. The internal thermal protection protects the
compressor from overheating and overcurrents. The protection is automatically restored as soon as the
nominal temperature conditions are reached.
5.5. CONDENSER
The condenser is the element in which the gas coming from the compressor is cooled down and condensed
becoming a liquid. Mechanically, it is formed by a copper tubing circuit (with the gas flowing inside)
immersed in an aluminium blades package.
The cooling operation occurs via a high efficiency axial ventilator which, in applying pressure on the air
contained within the dryer, forces it into the blades package.
It’s mandatory that the temperature of the ambient air will not exceed the nominal values. It’s important
TO
KEEP THE UNIT FREE FROM DUST AND OTHER IMPURITIES .
5.6. FILTER DRIER
Traces of humidity and slag can accumulate inside the refrigerating circuit. Long periods of use can also
produce sludge. This can limit the lubrication efficiency of the compressor and clog the expansion valve or
capillary tube. The function of the Filter Drier, located before the capillary tubing, is to eliminate any
impurities from circulating through the system.
5.7. CAPILLARY TUBE
It consists of a piece of reduced cross section copper tubing located between the capacitor and the
evaporator to form a throttling against the flow of the refrigerating fluid. This throttling creates a pressure
drop, which is a function of the temperature to be reached within the evaporator: the lower the capillary tube
outlet pressure, the lower the evaporation temperature. The length and the diameter of the capillary tubing
are accurately sized with the performance to be reached by the dryer; no maintenance/adjustment
operations are necessary.
5.8. ALU-DRY MODULE
The heat exchanger module houses the air-to-air, the air-to-refrigerant heat exchangers and the demister
type condensate separator. The counter flow of compressed air in the air-to-air heat exchanger ensures
maximum heat transfer. The generous cross section of flow channel within the heat exchanger module
leads to low velocities and reduced power requirements. The generous dimensions of the air-to-refrigerant
heat exchanger plus the counter flow gas flow allows full and complete evaporation of the refrigerant
(preventing liquid return to the compressor). The high efficiency condensate separator is located within the
heat exchanger module. No maintenance is required and the coalescing effect results in a high degree of
moisture separation.