Abstract: An evaporator rough-in box includes a flat panel having a first score mark by which the flat panel can be folded between a front wall and a top wall of the rough-in box, and a second score mark by which the flat panel can be folded between the front wall and a bottom wall of the rough-in box. The front wall has an opening through which an interior of the rough-in box can be accessed, the opening being covered by a removable cover plate. Left and right ends of the top and bottom walls include extension pieces bendably attached to central portions of the top and bottom walls to form mounting brackets. The central portions include score marks that delineate knock-out holes by which a lineset and a drain line can be installed to the rough-in box. A drain fitting is attached to the knock-out hole of the drain line.

Abstract: An evaporator rough-in box includes a flat panel having a first score mark by which the flat panel can be folded between a front wall and a top wall of the rough-in box, and a second score mark by which the flat panel can be folded between the front wall and a bottom wall of the rough-in box. The front wall has an opening through which an interior of the rough-in box can be accessed, the opening being covered by a removable cover plate. Left and right ends of the top and bottom walls include extension pieces bendably attached to central portions of the top and bottom walls to form mounting brackets. The central portions include score marks that delineate knock-out holes by which a lineset and a drain line can be installed to the rough-in box. A drain fitting is attached to the knock-out hole of the drain line.

Abstract: An evaporator rough-in box includes a plurality of walls that define and enclose a chamber, a first one of the walls having cutting lines that encircle a faceplate, one of the cutting lines defining an integral hinge that maintains the faceplate attached to the first one of the walls when a remainder of the cutting lines are cut so that the faceplate can move between an open position and a closed position. A closure maintains the faceplate in the closed position by attaching an edge of the faceplate to the first one of the walls. In addition, ports are provided in at least one of the walls, and a drainage sump is provided at a vertically lower end of the rough-in box, the drainage sump having a drain outlet.

Abstract: An evaporator rough-in box includes a plurality of walls that define and enclose a chamber, a first one of the walls having cutting lines that encircle a faceplate, one of the cutting lines defining an integral hinge that maintains the faceplate attached to the first one of the walls when a remainder of the cutting lines are cut so that the faceplate can move between an open position and a closed position. A closure maintains the faceplate in the closed position by attaching an edge of the faceplate to the first one of the walls. In addition, ports are provided in at least one of the walls, and a drainage sump is provided at a vertically lower end of the rough-in box, the drainage sump having a drain outlet.

Abstract: An evaporator rough-in box includes a plurality of walls that define and enclose a chamber, a first one of the walls having cutting lines that encircle a faceplate, one of the cutting lines defining an integral hinge that maintains the faceplate attached to the first one of the walls when a remainder of the cutting lines are cut so that the faceplate can move between an open position and a closed position. A closure maintains the faceplate in the closed position by attaching an edge of the faceplate to the first one of the walls. In addition, ports are provided in at least one of the walls, and a drainage sump is provided at a vertically lower end of the rough-in box, the drainage sump having a drain outlet.

Abstract: A fitting is provided with an integral orientation indicator that can be permanently fixed to or detachable from the fitting. The orientation indicator allows the installer of the fitting to ensure that the fitting, as well as the upstream and downstream parts of the fluid conveying system associated with the fitting, are properly oriented so that liquid will flow in the desired direction. When the fitting is connected to the primary condensate outlet of the drain pan on a central air conditioning unit, the orientation indicator can be used to ensure that liquid will flow out of the drain pan.

Abstract: An evaporator unit produces condensate liquid in an air cooling system. The evaporator unit includes a reservoir that receives the condensate liquid, and a pump that communicates with the reservoir to pump the condensate liquid out of the reservoir. The evaporator unit also includes a filter to filter the condensate liquid. Further, the evaporator unit includes an outer casing that includes an opening panel adjacent to the reservoir, so that the reservoir is accessible when the opening panel is in an open position. The evaporator unit includes a filter in the reservoir or upstream of the pump.

Abstract: A condensate liquid pumping system pumps from a reservoir outlet condensate liquid received from an air-handling apparatus. A filter located upstream of the reservoir outlet filters the condensate liquid. A filter blockage sensor located upstream of the filter senses a predetermined liquid level upstream of the filter which is indicative of blockage of the filter. The filter and the filter blockage sensor may be disposed inside the reservoir. The filter may be a removable filter that can be easily withdrawn for service or replacement without disassembling the reservoir or disconnecting or disturbing any of the tubing or other components of the reservoir or the condensate liquid pumping system.

Abstract: A clamp assembly for mounting devices such as a condensate over detection and/or prevention mechanism to a drain pan of an air cooling system includes first and second clamp members that are attachable to each other. The first clamp member includes a first engaging portion that engages a first surface of the drain pan, and the second clamp member includes a second engaging portion that engages a second surface of drain pan. The assembly includes a locking mechanism that locks the first and second clamp members to each other so that the pan is clamped between the first and second clamp members.

Abstract: A condensate overflow prevention assembly prevents condensate overflow in an air cooling system using a fluid level sensor and a pump activated by the fluid level sensor to pump the condensate away from a drainage system when a blockage occurs in the drainage system.

Abstract: A drain tube that can be used, for example, in an air cooling system, includes an inlet end for attachment to the drain pan of the air handler, and an outlet end for transporting liquid out of the drain pan. A liquid sensor probe is located at least partially in the drain tube, and includes a probe end that extends from the drain tube inlet end into the drain pan when attached to the drain pan. The liquid sensor probe detects the undesired accumulation of liquid in the drain pan caused by a blockage in the drain pan, in the drain tube, or in any other portion of the drainage tubing. A control circuit generates an output signal when excess liquid is present at the probe end of the liquid sensor so as to sound an alarm and/or turn off the air cooling device. The outlet end of the drain tube can be attached to a first leg of a cross-shaped fitting. The cross-shaped fitting includes a second leg opposite to the first leg through which a cleaning device can access the first leg, the drain tube, and the drain pan.