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Premier Heat Pumps – Water Heater and Chiller Manual
Page 12
3-4 How the reversible heat pump operates
By using the free energy contained in the ambient air, the heat pump enables
the heating of the water in a very economical way. Your heat pump is a heat
machine that can transfer the heat from a low temperature area (ambient air) to
a higher temperature area.
How the pump operates in heating mode:
The heat of the air is absorbed by the cold, liquid refrigerant, through the
evaporator (radiator with wings), the refrigerant is vaporised. Then the
compressor increases the pressure and the temperature, and sends it into the
condenser (exchanger) where it loses its heat by transferring it to the water. The
refrigerant then returns to the liquid state, it loses its pressure and cools again,
flowing into the pressure reducer before returning to the evaporator for a new
cycle.
Operating cooling mode or defrosting mode:
A 4 way valve enables a reverse cycle of the refrigerant; this fluid liquid is
vaporized in the exchanger (the evaporator) by taking the heat out of the water,
which then passes into the compressor that heats it and in turn sends it to the
radiator (the condenser) where the refrigerant returns to it's liquid state.
Note: Single water heater without cooling water mode; Single water chiller
without heating water mode and defrosting mode.