Machine Description - Vitrifrigo MACS 7 Serie Manuel D'installation

5. MACHINE DESCRIPTION

1 Rotary compressor
2 Evaporator
3 Sea water condenser
4 Coaxial fan
5 Condensate drain
The air conditioner works according to a compression cycle of refrigerant, sea water and boat room air. The
machine has two mode, cooling mode (for the hot seasons) and heat pump mode (for the cold seasons).
In cooling mode, the air inside the cabin is drawn in by a fan and passed through the evaporator for to be
cooled and dehumidified. At the same time, the refrigerant exchange the heat of the air for to evaporate
and enter in the compressor. The compressor pressurizes the refrigerant and the gas passed through the
seawater condenser that it is reducing the gas temperature and change state. At the end, the refrigerant
enters in the capillary pipe for reducing your pressure and enter in the evaporator.
In heating mode, the refrigeration cycle is reversed by a 4-way valve. In this is situation the condenser and
evaporator exchange your roles. The refrigerant, passed through the sea water exchanger (now
evaporator), extracts the heat from the water and evaporates. The gas enters in the compressor and that
pressurizes it. The refrigerant passed through the evaporator (now condenser) and exchange the heat with
the air cabin. At the end, the gas passed through the capillary pipe, the coolant returns to the evaporator
and the cycle repeats.
Fig. 1 – (MACS machine)
6 Capillary pipe
7 4-way valve
8 Low pressure switch
9 High pressure switch
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