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DUCTLESS SPLIT SYSTEM AC UNITS Section 15865 15-1207 J. Outdoor Unit Cabinet: 1. The casing shall be constructed from galvanized steel plate, coated with a finished with an electrostatically applied, thermally fused acrylic or polyester powder coating for corrosion protection and have a munsell 3Y 7.8/1.1 finish. 2. The fan grille shall be of ABS plastic. K. Outdoor Unit Fan: 1. Unit to be furnished with an AC fan motor. The fan motor shall be of aerodynamic design for quiet operation, and the fan motor bearings shall be permanently lubricated. The outdoor unit shall have horizontal discharge airflow. The fan shall be mounted in front of the coil, pulling air across it from the rear and dispelling it through the front. The fan shall be provided with a raised guard to prevent contact with moving parts. L. Outdoor Unit Coil: 1. The L shaped condenser coil shall be of copper tubing with flat aluminum fins to reduce debris build up. 2. The coil shall be protected with an integral metal guard. 3. Refrigerant flow from the condenser shall be controlled by means of linear expansion valve (LEV) metering orifice. The LEV shall be control by a microprocessor controlled step motor. M. Outdoor Unit Compressor: 1. The compressor shall be a DC rotary compressor with Variable Compressor Speed Inverter Technology. 2. The compressor shall be driven by inverter circuit to control compressor speed. 3. The compressor speed shall dynamically vary to match the room load for significantly increasing the efficiency of the system which results in vast energy savings. 4. To prevent liquid from accumulating in the compressor during the off cycle, a minimal amount of current shall be intermittently applied to the compressor motor to maintain enough heat. 5. The outdoor unit shall have an accumulator and high pressure safety switch. 6. The compressor shall be mounted to avoid the transmission of vibration. N. Outdoor Unit Electrical: The electrical power of the unit shall be 208volts or 230 volts, 1 phase, 60 hertz. a. The unit shall be capable of satisfactory operation within voltage limits of 198 volts to 253 volts. 2. The outdoor unit shall be controlled by the microprocessor located in the indoor unit. 3. The control signal between the indoor unit and the outdoor unit shall be pulse signal 24 volts DC. The unit shall have Pulse Amplitude Modulation circuit to utilize 98% of input power supply. 0