Heating and Cooling Diagrams

How does a geothermal unit produce heating, cooling and most of our hot water as well? 

The basic elements of a geothermal heat pump system include:
The Ground Loop — This system of fluid-filled plastic pipes buried in the shallow ground, or placed in a body of water, near the building.
The Heat Pump — removes heat from the fluid in the pipes, concentrates it, and transfers it to the building (for cooling, this process is reversed).
Air or Water Delivery System — conventional ductwork or piping is used to distribute heated or cooled air or water throughout the building.

Geothermal heat pumps use electricity to heat and cool, just like a conventional heat pump. However, unlike a conventional heat pump, geothermal heat pumps use the relatively constant temperature of the Earth as a source of heat in the winter and a heat trap for heat in the summer. In the winter, the fluid passing through the underground (or underwater) loops of piping is warmed by the Earth’s heat. The collected heat is extracted and concentrated by the heat pump, and distributed through the building’s ductwork.To cool the building in the summer, this process is reversed — the heat pump moves heat from the indoor air into the underground loops, where it is transferred to the relatively cooler ground. The heat removed from the indoor air during the summer can also be used to produce some of your hot water to heat swimming pools instead of transferring it to the ground.
Here is a great Utube video!