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. Neither of the air conditioners is operated in their less efficient second stages if both air conditioners are not first operating in their high efficiency first stages so that the entire cooling requirements of the area served by the air conditioners is primarily served by the first high efficiency stage of one or both the air conditioners.
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. Neither of the air conditioners is operated in their less efficient second stages if both air conditioners are not first operating in their high efficiency first stages so that the entire cooling requirements of the area served by the air conditioners is primarily served by the first high efficiency stage of one or both the air conditioners.