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FOOD SERVICE <br />EQUIPMENT <br />Section 11400 <br />15-1207 <br />2. Condensing units shall be air cooled semi -hermetic compressors. <br />3. Unit evaporators shall be sized and furnished as part of this item. <br />4. The system shall be provided with a weather cover and mounting <br />channel unit and shall be completely treated with a rust <br />preventative and two coats of baked enamel paint in color as <br />selected by the Architect and where required shall be removable. <br />5. The condensing units shall be factory installed and factory wired <br />to a common load center panel for one point field electrical <br />connection. All wiring from the condensing units to the load center <br />shall be through an electrical raceway. <br />6. The load center control panel shall be U.L listed and N.E.0 <br />approved and weatherproof with individual breakers for each <br />condensing unit and time clocks. All contractors, time clocks, <br />relays, automatic starting switches and any necessary electrical <br />components shall be installed with the load center panel. <br />7. All condensing units shall be manufactured by Copeland. <br />8. The system shall incorporate the following items: <br />a. Flexible vibration eliminator in the suction line. <br />b. Liquid line sight glass. <br />C. Liquid line dehydrator filter of ample capacity. <br />d. Suction line filter of ample capacity. <br />e. Thermal expansion valve for evaporator. <br />f. Heat exchanger for evaporator. <br />g. Refrigeration lines, hard copper Type "L" with "Silfos" <br />brazed joints. <br />h. Defrost timers and interlock relays as required. <br />I. Winter control package. <br />9. Circuit breakers, automatic starting switch, motor protectors and <br />pressure limit switches, all enclosed with interconnecting wires <br />installed in a control panel ready for final connection by the <br />Electrical Contractor. <br />10. Drain line heaters with insulated covers for all drain lines from unit <br />evaporators to nearest indirect waste (floor sink). <br />11. Start-up, adjustment, and one year parts and labor warranty. Five- <br />year warranty on motor compressors. <br />5. REFRIGERATION PIPING: <br />A. Copper tubing shall conform to ASTM B88, piping shall be type `L' ARC, <br />refrigerant piping shall be exposed to view as required by the American <br />Standard Safety Code for Mechanical Refrigeration. <br />B. Suction lines shall be sized to give a minimum pressure drop from <br />evaporator to machine of 2 lbs. For high temperature systems and 1 lbs. <br />for low temperature systems and shall allow gas velocities of not less that <br />750 FPM in horizontal runs and 1500 FPM in vertical risers. Liquid lines <br />shall be sized to give maximum pressure drop of 3 lbs. from receiver to <br />evaporator. <br />C. Tubing shall be graded to prevent trapping of oil. <br />26 <br />