Abstract: A single package, wall mount air conditioner including a cabinet, an evaporator coil assembly, a condenser coil assembly, and a theft deterrent system. The theft deterrent system including metal straps securing the coil assemblies to the cabinet and impeding their removal from the cabinet. The straps having boxed cross-sections and being attached by specialty fasteners requiring a non-standard tool to remove, wherein the heads of the fasteners are shielded to only permit the axial access required by the tool. The theft deterrent system further including a sensor configured to monitor a condition of the air conditioner, wherein the condition is indicative of an attempt to remove the coil assemblies from the cabinet, and to communicate an alarm signal through a speaker or to a remote monitoring station if the condition occurs. The sensor may include one or more of a plunger-type switch, a vibration sensor, or a refrigerant monitoring sensor.

Abstract: A method of controlling operation of a pair of two-stage air conditioners. The method monitors a temperature of an area served by the air conditioners; activates a first stage of a first or lead air conditioner when the temperature rises above a first set point temperature; activates a first stage of a second or lag air conditioner when the temperature rises above a second set point temperature; activates a second stage of the first air conditioner only if the temperature remains above the second set point temperature beyond a first selected time period; and activates a second stage of the second air conditioner only if the temperature remains above the second set point temperature beyond a second selected time period.

Abstract: A method of controlling operation of a pair of two-stage air conditioners. The method monitors a temperature of an area served by the air conditioners; activates a first stage of a first or lead air conditioner when the temperature rises above a first set point temperature; activates a first stage of a second or lag air conditioner when the temperature rises above a second set point temperature; activates a second stage of the first air conditioner only if the temperature remains above the second set point temperature beyond a first selected time period; and activates a second stage of the second air conditioner only if the temperature remains above the second set point temperature beyond a second selected time period.