The evaporator coil contained in each unit is constructed with copper tubes and aluminum fins mounted in a stainless steel drain pan. The drain pan is made witha bottom drain connection and installed in a manner that provides a positive drain to prevent standing water in the condensate pan. The refrigeration circuit includes a scroll compressor with internal overload protection and crankcase heater. The circuit includes an expansion valve with an external equalizer, filter drier, sight-glass, and high and low pressure safety switches. The high and low pressure safety switches are connected to the refrigerant system with a Schrader fitting that allows replacement without affecting the refrigerant charge, making recovery unnecessary.
The blower assembly is a draw-through type with a centrifugal, forward curved, double width, double inlet blower configuration engineered for quiet, reliable operation. The belt driven variable pitch drive provides adjustable air flow capability to match the requirements of the controlled space. The draw-through design insures even distribution across the coil, low internal cabinet losses, and static sealing of the filter section. The motor has internal overload protection and is mounted on an adjustable slide base.