Systems and methods for deploying a defrost heater include a rod heater bracket that includes a body including a first edge and a second edge opposite the first edge. The bracket includes at least one L-shaped slot formed in the body. The L-shaped slot includes an opening along the first edge, and a groove located adjacent to the second edge and configured to retain at least a portion of a rod heater adjacent an evaporator of a refrigerated display case. The rod heater bracket includes a tab configured to be adjusted between an open position to allow access to the groove through the second edge and a closed position to block access to the opening between the second edge and the groove.

Disclosed and described here are example temperature-controlled display cabinets having an interior conditioned space and a refrigeration circuit communicably coupled to a controller and charged with a refrigerant. The refrigeration circuit includes a compressor-condenser assembly removably coupled to the refrigeration circuit and/or temperature-controlled display cabinet. An evaporator is operably coupled to the refrigeration circuit, the evaporator is positioned at a bottom surface of the temperature-controlled display cabinet, and the compressor-condenser assembly is removably coupled to a top surface of the temperature-controlled display cabinet. Methods of installing temperature-controlled display cabinet with a charge of A3 refrigerant utilize disconnect fittings coupling the compressor-condenser assembly with the refrigeration circuit are further disclosed.

An LED lighting array system includes discrete lighting modules spatially arrayed along a support member to provide illumination of items within a display case. The modules have a low overall height that results in them being mounted in a low-profile configuration at various locations along the support member. The modules include a housing with opposed first and second sets of side apertures, a plurality of internal reflecting surfaces associated with the apertures, respectively, an external lens, a multi-sided light engine and a group of side-emitting LEDs. During operation, a first portion of light generated by the side-emitting LEDs is discharged through apertures and the lens into the cooler to illuminate contents therein, while a second portion of light generated by the side-emitting LEDs is redirected by the reflecting surface through said apertures and the lens into the cooler.