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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> Orange County Emergency Services Building Construction Documents <br /> 4. Coils: Direct expansion type constructed from copper tubes expanded into aluminum fins to <br /> form a mechanical bond; waffle louver fin and high heat exchange, rifled bore tube design; <br /> factory tested. <br /> a. Provide thermistor on liquid and gas lines. <br /> 5. Fans: Direct-drive, with statically and dynamically balanced impellers; high and low speeds <br /> unless otherwise indicated; motor thermally protected. <br /> 6. Return Air Filter: Washable long-life net filter with mildew proof resin, unless otherwise <br /> indicated. <br /> 7. Condensate Drainage: Built-in condensate drain pan with drain connection. <br /> a. Units With Built-In Condensate Pumps: Provide condensate safety shutoff and alarm. <br /> 8. Cabinet Insulation: Sound absorbing foamed polystyrene and polyethylene insulation. <br /> 9. Provide isolation ball valves at each piping connection to each indoor unit. <br /> B. Recessed Ceiling Units-2 FT by 2 FT: Four-way airflow cassette with central return air grille, sized <br /> for installation in standard 24 by 24 inch lay-in ceiling grid. <br /> 1. Cabinet Height: Maximum of 12 inches above face of ceiling. <br /> 2. Exposed Housing: White, impact resistant, with washable decoration panel. <br /> 3. Maintenance Access: All electrical components accessible through decoration panel. <br /> 4. Supply Airflow Adjustment: <br /> a. Via motorized louvers which can be horizontally and vertically adjusted from 0 to 90 <br /> degrees. <br /> b. Field-modifiable to 3-way and 2-way airflow. <br /> c. Three auto-swing positions, including standard, draft prevention and ceiling stain <br /> prevention. <br /> 5. Sound Pressure: Measured at low speed at 5 feet below unit. <br /> 6. Fan: Direct-drive turbo type. <br /> 7. Condensate Pump: Built-in, with lift of 21 inches, minimum. <br /> 8. Provide side-mounted supply air branch duct connection. <br /> 9. Provide side-mounted fresh air intake duct connection. <br /> C. Ceiling Surface-Mounted Units: White, finished casing, with removable front grille; foamed <br /> polystyrene and polyethylene sound insulation, and mounting brackets; mildew-proof polystyrene <br /> drain pan. <br /> 1. Airflow Control: Auto-swing louver that closes automatically when unit stops; five (5)steps of <br /> discharge angle, set using remote controller; upon restart, discharge angle defaulting to same <br /> angle as previous operation. <br /> 2. Sound Pressure Range: Measured at low speed at 3.3 feet below and away from unit. <br /> 3. Condensate Pump: Built-in, concealed, wide drain connection concealed in ceiling. <br /> 4. Fan: Two-speed, direct-drive cross-flow type. <br /> 5. Fan Motor Output Range: 0.083 to 0.174 HP. <br /> PART 3 EXECUTION <br /> 3.01 EXAMINATION <br /> A. Verify that condensate piping has been installed and is in the proper location prior to starting <br /> installation. <br /> 3.02 INSTALLATION <br /> A. Install in accordance with manufacturer's instructions. <br /> B. Install refrigerant piping in accordance with equipment manufacturer's instructions. <br /> C. Perform wiring in accordance with NFPA 70, National Electric Code (NEC). <br /> D. Coordinate with installers of systems and equipment connecting to this system. <br /> E. Provide isolation ball valves at piping connections to each indoor unit. <br /> 3.03 SYSTEM STARTUP <br /> A. Provide manufacturer's field representative to perform system startup. <br /> B. Prepare and start equipment and system in accordance with manufacturer's instructions and <br /> recommendations. <br /> PDC Project 18102 VARIABLE REFRIGERANT 2381 29-4 <br /> 12/17/2018 FLOW HVAC SYSTEMS <br />