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BEFORE INITIAL START-UP Job Data Required • list of applicable design temperatures and pressures (product data submittal) • chiller certified prints • starting equipment details and wiring diagrams • diagrams and instructions for special controls or options • 19XR Installation Instructions • pumpout unit instructions Equipment Required • mechanic’s tools (refrigeration) • digital volt-ohmmeter (DVM) • clamp-on ammeter • electronic leak detector • absolute pressure manometer or wet-bulb vacuum indi- cator (Fig. 27) • 500-v insulation tester (megohmmeter) for compressor motors with nameplate voltage of 600 v or less, or a5000-v insulation tester for compressor motor rated above 600 v Using the Optional Storage Tank and Pump- out System — Refer to Chillers with Storage Tanks sec- tion, page 69 for pumpout system preparation, refrigerant transfer, and chiller evacuation. Remove Shipping Packaging — Remove any pack- aging material from the control center, power panel, guide vane actuator, motor cooling and oil reclaim solenoids, motor and bearing temperature sensor covers, and the factory-mounted starter. Open Oil Circuit Valves — Check to ensure the oil fil- ter isolation valves (Fig. 4) are open by removing the valve cap and checking the valve stem. Tighten All Gasketed Joints and Guide Vane ShaftPacking —Gasketsandpackingnormallyrelaxby the time the chiller arrives at the jobsite. Tighten all gasketed joints and the guide vane shaft packing to ensure a leak-tight chiller. Check Chiller Tightness — Figure 28 outlines the proper sequence and procedures for leak testing. 19XR chillers are shipped with the refrigerant contained in the condenser shell and the oil charge in the compressor. The cooler is shipped with a 15 psig (103 kPa) refrigerant charge. Units may be ordered with the refrigerant shipped separately, along with a 15 psig (103 kPa) nitrogen-holding charge in each vessel. To determine if there are any leaks, the chiller should be charged with refrigerant. Use an electronic leak detector to check all flanges and solder joints after the chiller is pressur- ized. If any leaks are detected, follow the leak test procedure. If the chiller is spring isolated, keep all springs blocked in both directions to prevent possible piping stress and damage during the transfer of refrigerant from vessel to vessel during the leak test process, or any time refrigerant is being trans- ferred. Adjust the springs when the refrigerant is in operating condition and the water circuits are full. Refrigerant Tracer — Carrier recommends the use of an environmentally acceptable refrigerant tracer for leak testing with an electronic detector or halide torch. Ultrasonic leak detectors can also be used if the chiller is under pressure. Fig. 27 — Typical Wet-Bulb Type Vacuum Indicator 48 Do not use air or oxygen as a means of pressurizing the chiller. Mixtures of HFC-134a and air can undergo combustion.PDF Image | 19XR,XRV Hermetic Centrifugal Liquid Chillers 50/60 Hz With PIC II Controls and HFC-134a
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