How does it work?

Step 1 : The evaporator absorbs heat from the ambient air drawn through the evaporator coil by the fan (a). The heat is transferred to the cold refrigerant flowing through the evaporator coil and the residual cooler air generated by the process is then discharged out of the heat pump by the fan (b).

Step 2 : The compressor then receives the warmed refrigerant and by the compression action, heats it, elevating substantially the pressure inside the system. The now hot refrigerant converted to gas is then pumped to the condenser.

Step 3 : The heat from the hot refrigerant flowing inside the condenser is then transferred to the pool water, touching the exterior of the condenser coil, when flowing through the heat exchanger. In the process, the refrigerant temperature drops and the water temperature increases.

Step 4 : The now warm refrigerant flows through the pressure control regulator device (capillaries or expansion valve) greatly reducing the pressure inside the system and chilling the refrigerant to a cool state again. The refrigerant is then ready to restart the process and flow into the evaporator coil to collect the heat again.