DM14-01.01.18en
MIV V5 Heat Recovery DC Inverter R410A
52
Specifications
&
Performances
Oil separator:
It is used to separate oil from high pressure and high temperature gas refrigerant, which is
pumped out from compressor. The separation efficiency is up to 99%, it makes the oil return back to each
compressor very soon.
Gas-liquid separator:
It is used to store the liquid refrigerant and oil; it can protect the compressor from liquid
hammer.
EXV (Electromagnetic Expansion Valve):
It is used to adjust refrigerant volume.
Four-way valve ST1:
It is used to control the refrigerant flow of the left heat-exchanger. When the ST1 is OFF,
the left heat-exchanger is condenser. When the ST1 is ON, the left heat-exchanger is evaporator.
Four-way valve ST2:
It is used to control the refrigerant flow of the right heat-exchanger. When the ST2 is
OFF, the left heat-exchanger is condenser. When the ST1 is ON, the left heat-exchanger is evaporator or
closed.
Four-way valve ST3:
When the system is in total cooling mode, the ST3 is ON. When the system is in total
heating mode or mixed mode, the ST3 is OFF.
SV2:
It is used to protect compressor. When any compressor discharge temperature is higher than 100
o
C, SV2
will be open to spray a little liquid refrigerant to cooling compressor, and it will be closed when the discharge
temperature is lower than 90
o
C.
SV4:
It is used to balance the oil between modules.
SV5:
It is used for quick defrosting. In defrosting mode, the opening of SV5 can cut the refrigerant flowing
circle, so the defrosting process will takes less time. In cooling mode, it is always off.
Pressure switch:
It is used to protect the system pressure. When the system pressure is too high or too low,
the pressure switch will open. Once the pressure switch is open, the compressor will stop, and the compressor
will restart after ten minutes.
