. . . Adaptive Control logic can correct these variables, when necessary, to optimize operational efficiencies, avoid chiller shutdown, and keep producing chilled water. .
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16, Rigging . .
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.
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. . •Furnish and install flow switch to prove chilled water flow. .
. . . The result is a reliable chiller that will help you achieve your bottom line goals.
10.With the new length found in step #9, go back to Table 6 and find the new diameter for the circuit you are sizing. .
P�CvڵGO��$(�1 66, Refrigeration (Cooling) Cycle .
. . Attach cables to lifting beam. 2 … . .
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. .
. 23, Water Piping .
. . . . . .
. .
. 7.Using Table 4 again, find the new outside diameter that corresponds to the new equivalent line length from step # 6.
. . . . . . . . Also refer to Trane Engineering Bulletins for application information on RTAA chillers. . . . .
. . . Therefore, the final equivalent line length is: 6.From Table 6, for a 50 ton circuit, and 125 equivalent feet (nearest to 128.4): Horizontal or downflow suction line diameter = 2-5/8 inches.
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If the unit will remain operational at subfreezing ambient temperatures, the chilled water system must be protected from freezing, following the steps listed below: 1.Heat tape is factory-installed on the packaged unit evaporator and will protect it from freezing in ambient temperatures down to -20 F. 2.Install heat tape on all water piping, pumps, and other components that may be damaged if exposed to freezing temperatures. . . . . . . 1.From 23, the actual length of upflow, and horizontal or downflow is: 2.Table 5 for a 50 ton circuit shows: Upflow suction line outside diameter. . Install heat tape and insulate the chilled water lines and any other portions of the system, as required, to prevent sweating under normal operating conditions or freezing during low ambient temperature conditions. . . •Install unit per the instructions contained in the Installation-Mechanical and Installation-Electrical sections of this manual. . . Heat tape must be designed for low ambient temperature applications. Mount the switch upright, with a minimum of 5 pipe diameters of straight horizontal run on each side. . .
. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. . . . •Install chains and safety chains through the six lifting plates provided on the unit. Evaporator data is shown in Figure 16 Refer to Table 1 for minimum flow recommendations. . . . The sensors are prewired and each is “wire-tied” to its respective liquid line.
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. . . . .
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. . . .
. . . . With the previously mentioned assumptions, Table 7 indicates 15 feet of 2-5/8 inch O.D.
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. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. While iterating to determine the proper equivalent line length use the “Horizontal or Downflow” column of Table 4. . . . . The owner must provide reasonable evidence that the damage did not occur after delivery. . . . . . . . . . . Next, determine the charge required for the field-installed piping by referring to Table 9. . .
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. .
112, System Restart After Extended Shutdown .
. . . . (The latter includes the equivalent length of pressure drops of all associated field installed fittings, valves, accessories, and straight lengths of interconnecting piping including the suction accumulator.). . . .
. Remote evaporator weights and mounting locations are shown in Figure 10 and Figure 11. . . . . . Actual requirements will be in direct proportion to the actual length of piping. . . . . . . . .
. . . . . General Information . . . . .
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. The units are factory charged with refrigerant and oil. . . •Vibration eliminators. .
. .
. . Supply and install a vent cock to the top of the evaporator. . Trane is not responsible for equipment-only-damage caused by water born debris.
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. . .
. . The compressor nameplate provides following information: When the unit is delivered, verify that it is the correct unit and that it is properly equipped. . . 10.When the elevation of the remote evaporator exceeds that of the outdoor condensing unit as shown in Figure 20, the elevation difference may not exceed 15 feet.
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. .
. . Total lifting weight, lifting weight distribution and required lifting beam dimensions are shown in Figure 4 and Figure 5 and on the rigging diagram shipped with each unit.
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. . Trane Air Cooled Chiller Model RTAA 130 to 400 tons - IOM 1991. . .
. . . . . Adaptive Control logic can adjust these variables, when necessary, to optimize operational efficiencies, avoid chiller shutdown, and keep producing chilled water. . . . . . . . . The use of improperly treated or untreated water in this equipment may result in scaling, erosion, corrosion, algae or slime. . . . . 137, System Start-up . . . .
•Inspect the individual pieces of the shipment before accepting the unit. . To prevent damage do not use a forklift to lift or push the unit.
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. . . 6, Unit Description . . . If desired, install thermometers in the lines to monitor entering and leaving water temperatures. . . .
. 5.Multiply by 1.5, the actual length of the horizontal or downflow portion of the suction line.
. . . . .
. Reliability, efficiency, sound, and physical size were primary design concerns in expanding the RTAA product line down to 70 tons. .
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