Figure 7-6. - Package type of air-conditioning unit showing airflow patterns.

Figure 7-7. - A refrigerant cycle of a package air conditioner.

Figure 7-8. - Air-handling components of a package type of room air conditioner.

referred to as PACKAGE units, as the entire system is located in the conditioned space. These larger units, like window units, contain the complete system of refrigeration components. A self-contained unit with panels removed is shown in figure 7-9. These units normally use either a water-cooled or air-cooled condenser.

Self-contained units should be checked regularly to ensure they operate properly. Filters should be