Carrier 17EX Start-up, Operation And Maintenance Instructions Manual

Also see for 17EX Series: Start up & operation manual Start-up, operation and maintenance instructions

Contents

Safety Shutdown — A safety shutdown is identical toa manual shutdown with the exception that the LID displaysthe reason for the shutdown, the alarm light blinks continu-ously, and the spare alarm contacts are energized. A safetyshutdown requires that the RESET softkey be pressed inorder to clear the alarm. If the alarm continues, the alarmlight continues to blink. Once the alarm is cleared, the op-erator must press the CCN or LOCAL softkeys to restartthe chiller.Do not reset starter loads or any other starter safety for30 seconds after the compressor has stopped. Voltageoutput to the compressor start signal is maintained for10 seconds to determine starter fault.BEFORE INITIAL START-UPJob Data Required• list of applicable design temperatures and pressures (prod-uct data submittal)• certified drawings of the chiller• starting equipment details and wiring diagrams• diagrams and instructions for special controls or options• installation instructions• pumpout unit instructionsEquipment Required• mechanic’s tools (refrigeration)• digital volt-ohmmeter (DVM)• clamp-on ammeter• electronic leak detector• absolute pressure manometer or wet-bulb vacuum indica-tor (Fig. 23)• 500 v insulation tester (megohmmeter) for compressor mo-tors with nameplate voltage of 600 v or less, or a5000 v insulation tester for compressor motor rated above600 vUsing the Economizer/Storage Vessel and Pump-out System — Refer to the Pumpout and Refrigerant Trans-fer Procedures section, page 63 for: pumpout system prepa-ration, refrigerant transfer, and chiller evacuation.Remove Shipping Packaging — Remove any pack-aging material from the control center, power panel, guidevane actuator, motor and bearing temperature sensor covers,and the factory-mounted starter.MOTORThe motor may be provided with a shipping brace orshipping bolt (normally painted yellow) to prevent shaftmovement during transit. It must be removed prior tooperation. See Fig. 24.The motor should be inspected for any temporary, yellowcaution tags with legends that convey information concern-ing actions necessary before the motor can be safely oper-ated. Any slushing compound on the shaft or other parts mustbe removed using a petroleum type solvent. Observe propersafety precautions.NOTE: If a shipping bolt was used to restrain the rotor, theWestinghouse logo must be installed over the hole in the end-cover. The logo, the gasket, and hardware can be found withthe parts that have been shipped loose. (Usually these arepacked inside the main power lead box.)EXTERNAL GEAR — Remove any packaging material thatmay be on the external gear. Be sure that the breather is inplace and free of any obstructions.Motor Electrical Connection — All interconnect-ing wiring for controls and grounding should be in strict com-pliance with both the (NEC) National Electrical Code andany local requirements.The main lead box furnished with the motor has been sizedto provide adequate space for making up connections be-tween the motor lead cables and the incoming power cables.The bolted joints between the motor lead and the power cablesmust be made and insulated in a workman-like manner fol-lowing the best trade practices.Fabricated motors are provided with 2 stainless steel ground-ing pads drilled and tapped with the NEMA (National Elec-trical Manufacturers Association) 2-hole pattern (two 1 ⁄2 -13tapped holes on 1 3⁄ 4 in. centers). Fan cooled cast frames areprovided with a special grounding bolt. The motor should begrounded by a proper connection to the electrical system ground.Fig. 24 — Shipping Bolt on Open Drive MotorFig. 23 — Typical Wet-Bulb TypeVacuum Indicator45