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• FOOD SERVICE EQUIPMENT Section 11400 <br /> A. Air-cooled condensing units shall be hermetic/glacier <br /> scroll type(Copeland). Each unit shall be equipped with high-low pressure control, liquid <br /> drier, sight glass&head pressure control. <br /> B. All compressor units shall be new factory assembled to operate with the refrigerant <br /> specified in the engineering summary sheet. Refrigerant R-404a shall be used on all <br /> commercial temperature units and low temperature units. <br /> 2. PRE-PIPING <br /> A.All refrigerant lines shall be extended to right side of the package in a neat and orderly <br /> manner and must be piped through a pitch pocket inside the refrigeration rack. Suction <br /> line for medium and low temperature units must be insulated with Armaflex(1/2"thick) <br /> B. All tubing shall be securely supported and anchored with clamps. <br /> C. Silver solder and/or sil-fos shall be used for all refrigerant piping. Soft solder is not <br /> acceptable. <br /> D. All piping to be pressure tested with nitrogen at 300 PSI. After the condensing unit and <br /> coil have been connected, the balance of the system shall be leak tested with all valves <br /> open. <br /> 3. CONTROL PANEL <br /> A. The package shall have factory mounted and pre-wired control panel complete with <br /> main disconnect breaker switch, compressor circuit breakers, fuses, contactors and time <br /> clocks wired for single point connection_ <br /> B. Electrical contractor shall provide and install main power lines to panel and provide <br /> wire harness wiring for control and defrost heater between and the defrost clock and the <br /> refrigerant fixtures, all in accordance with the wiring diagram and local codes. <br /> 4. SAFETY CAUTION <br /> Each system and evaporator is shipped under nitrogen <br /> pressure. Use caution and exercise safety at all times when preparing for final hook-up. <br /> 5. EVAPORATOR COIL <br /> Evaporator coils shall be direct expansion type fabricated of copper tubes with aluminum <br /> fins. All evaporator coils shall be provided with solenoid valve, thermostatic expansion <br /> valve, and thermostat. Piped and wired to the junction box for positive pump down. <br /> CONSTRUCTION NOTES FOR TRADES <br /> 1. GENERAL CONTRACTOR <br /> A. Contractors shall verify all dimensions and coordinate with other trades. <br /> B. General contractor shall prepare and weather proof the platform and curbed openings. <br /> 2. REFRIGERATION CONTRACTOR <br /> Valentine M. Peyton Elementary School 11 Job No. 2749 <br />