Climates with moderate heating needs often turn to heat pumps as an energy efficient option for indoor packaged unit cooling.
Heat pumps use electricity and extract heat from the cool outdoor air, moving it into the indoor space to make it warmer.
The refrigeration circuit becomes a heat pump by using a crossover reversing valve.
1. Outdoor Air Coil- Outdoor Air coil transfers refrigerant heat to the outside air during cooling
3. Crossover reversing valve- When the heating is required, the heat pump's crossover reversing valve switches the refrigerant flow. Thus, the roles of the evap and condenser are reversed.
4. Indoor Coil- extracts heat and transfers it to the refrigerant during cooling.
2. Outdoor Air Coil- extracts heat from the outside air transferring it to the refrigerant during heating
3. Crossover reversing valve- When the heating is required, the heat pump's crossover reversing valve switches the refrigerant flow. Thus, the roles of the evap and condenser are reversed.
5. Indoor Coil- transfers refrigerant heat to indoor air during heating
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