Metro Therm METROAIR AQUA HPM, Руководство пользователя

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3.7 Refrigerant circuit – description
The cooling system is optimized for extracting the heat from the inlet air. Via the cooling system
the extracted heat is transferred to the water. The process is only possible with the addition of
additional external energy in the compressor. The cooling system is a closed system where the
HCFC-free refrigerant R134a is the energy carrier.
In the evaporator, heat is absorbed from the air and transferred to the refrigerant at low evapo-
ration temperature. Refrigerant in gaseous form is fed to the compressor, in which it is raised up
to a higher pressure and temperature level and transported to the condenser. In the condenser
the refrigerant condense and the heat absorbed in the evaporator plus some of the compressor
energy is transferred to the water.
Finally the high condensing pressure is throttled to the evaporating pressure using an expansion
valve and the refrigerant can again absorb heat from the extract air in the evaporator.
3.7.1 Refrigerant circuit – diagram
3 About the product
Air temp
sensor
(T5)
Evaporating temp
sensor (T6)
Evapo
rator
Filter drier
Compressor
Thermostatic
expansion
valve
HP-switch
Condenser
Cold water
inlet
Hot water
outlet
Solonoid valve
Check-
valve
Fan
Hot water outlet