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Trane Rtaaiom3 Manual

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    							LibraryService Literature
    Product SectionRefrigeration
    ProductRotary liquid Chillers – Air-Cooled
    ModelRTAA
    Literature TypeInstallation, Operation, Maintenance
    Sequence3
    DateDecember 1991
    File No.SV-RF-RLC-RTAA-IOM-3-1291
    Supersedes
    Installation RTAA-IOM-3
    Operation
    Maintenance
    Since The Trane Company has a policy of continuous product improvement, it reserves the right to change
    specifications and design without notice. The installation and servicing of the equipment referred in this booklet
    should be done by qualified, experienced technicians.
    Air-Cooled
    Series R
    ®
    Rotary Liquid
    Chillers
    “CO” and Later Design Sequence
    Packaged Air-Cooled Chiller,
    RTAA 130-400
    Remote Evaporator Air-Cooled Chiller,
    RTAA 130-200
    Models
    RTAA-130 RTAA-170 RTAA-240 RTAA-340
    RTAA-140 RTAA-185 RTAA-270 RTAA-370
    RTAA-155 RTAA-200 RTAA-300 RTAA-400
    Part No. X39560468-01 
    						
    							3RTAA-IOM-3 
    						
    							4RTAA-IOM-3
    77 Operating Principles -
    Mechanical
    77 General
    77 Refrigeration (Cooling) Cycle
    77 — Cycle Description
    77 — Compressor Description
    77 — Compressor Motor
    77 — Compressor Rotors
    77 — Compressor Loading Sequence
    82 Oil System Operation
    82 — Overview
    82 — Domestic Water Heater
    83 — Oil Separator
    83 — Compressor Bearing Oil Supply
    83 — Compressor Rotor Oil Supply
    84 — Slide Valve Movement
    84 — Oil Filter
    84 —Condenser Fans
    87 Operating Principles -Adaptive
    Control™ Microprocessor Logic87 General
    87 Digital Display
    93 — Menus
    99 — Chiller Switch
    100 Menu Function Descriptions and
    Selection
    100 — Selecting Variables and Options
    100 — Menu 0 - Operating Display
    100 — Menu 1 - Service #1 Display
    101 — Menu 2 - Service #2 Display
    101 — Menu 3 - Auxiliary Options
    102 — Menu 4 - Factory Display #1
    104 — Menu 5 - Factory Display #2
    105 Operational Features
    105 — Entering Evaporator Water
    Temperature
    105 — Current Limit Setpoint
    105 — Low Ambient Lockout
    105 — Electronic Expansion Valve
    (EXV) Test
    105 — Current Overload Protection
    105 — Leaving Chilled Water
    Temperature Control
    106 — Chilled Water Reset (CWR)
    107 — Leaving Water Temperature
    Cutout
    107 — Low Refrigerant Temperature
    Cutout
    107 — Low Ambient Temperature Start
    107 — Low Refrigerant Temperature
    Cutout Retry
    108 — Auto Lead/Lag
    108 — Phase Imbalance Protection
    108 —Reverse Rotation Protection
    108 DIP Switch Settings
    108 Compressor Overload DIP
    Switches
    108 IPC Address
    108 — 2-10 VDC/4-20 mA Input for
    (CWS) and (CLS)
    109 Diagnostics and Troubleshooting
    109 —Mechanical Control Settings
    121 Pre-Start Check-out121 General
    122 Unit Voltage Power Supply
    122 Unit Voltage Imbalance
    123 Unit Voltage Phasing
    124 Water System Flow Rates
    124 Water System Pressure Drop
    124 UCM Set-up
    125 Start-up Procedures
    125 General
    125 System Superheat
    125 System Subcooling
    129 Unit Shutdown Procedures129 Temporary Shutdown and Restart
    129 Extended Shutdown Procedure
    130 System Restart After Extended
    Shutdown
    131 Periodic Maintenance131 General
    133 Refrigerant Emission Control
    133 Weekly Maintenance
    134 Monthly Maintenance
    134 Annual Maintenance
    135 Maintenance135 General
    135 Coil Cleaning
    135 Chemically Cleaning the
    Evaporator
    135 Domestic Water Heater –
    Tube Cleaning
    136 Water Treatment
    136 Oil Separator Level Check 
    						
    							5RTAA-IOM-3
    37 Figure 18
    Spring Isolator Placement for
    Typical RTAA Packaged Unit
    - 130 to 200 Tons
    38 Figure 19
    Spring Isolator Placement for
    Typical RTAA Packaged Unit
     -240 to 400 Tons
    39 Figure 20
    Spring Isolator Placement for
    Typical RTAA Outdoor Unit with
    Remote Evaporator Option
     40 Figure 21
    Spring Isolator Placement for
    Typical RTAA Unit with Heat
    Recovery Domestic Water Heater
    41 Figure 22
    Suggested Piping for Typical RTAA
    Evaporator
    43 Figure 23
    RTAA 130 thru 400 Evaporator
    Water Pressure Drop
    46 Figure 24
    Typical Domestic Water Heater
    Piping
    46 Figure 25
    RTAA 130 thru 400 Domestic
    Water Heater Water Pressure Drop
    47 Figure 26
    Remote Evaporator Installation -
    No Elevation Difference
    48 Figure 27
    Remote Evaporator Installation -
    Condenser and Compressor above
    Evaporator
    49 Figure 28
    Restricted Installation -Evaporator
    is More Than 1’8 Above Base of
    Outdoor Unit.
    49 Figure 29
    Restricted Installation -Suction
    Line is on a Higher Plane than the
    Outdoor Unit.
    50 Figure 30
    Refrigerant Circuit Identification
    52 Figure 31
    Remote Evaporator Piping
    Example
    55 Figure 32
    Customer Interconnect Wiring for
    RTAA Outdoor Unit with Remote
    Evaporator -130 to 200 Tons
    57 Figure 33
    Warning Label
    58 Figure 34
    Typical Field Wiring for RTAA
    Packaged Unit - 130 to 200 Tons
    61 Figure 35
    Typical Field Wiring for RTAA
    Packaged Unit - 240 to 400 Tons
    List of
    Illustrations
    11 Figure 1
    Typical RTAA Packaged Unit -
    130 to 200 Tons (Front/side
    Exterior View)
    12 Figure 2
    Typical RTAA Packaged Unit -
    130 to 200 Tons (Rear/side Exterior
    View)
    13 Figure 3
    Typical RTAA Packaged Unit -
    240 to 400 Tons (Front/side
    Exterior View)
    14 Figure 4
    Typical RTAA Unit (Rear Exterior
    View)
    15 Figure 5
    Typical RTAA Unit with Remote
    Evaporator Option (Rear Exterior
    View)
    18 Figure 6
    Remote Evaporator
    21 Figure 7
    Nameplates
    22 Figure 8
    Model Number Coding System
    26 Figure 9
    Dimensions and Clearances for
    RTAA Packaged Unit
     - 130 to 200 Tons
    27 Figure 10
    Dimensions and Clearances for
    RTAA Packaged Unit
     - 240 to 300 Tons
    28 Figure 11
    Dimensions and Clearances for
    RTAA Packaged Unit
     - 340 to 400 Tons
    29 Figure 12
    Dimensions and Clearances for
    RTAA Outdoor Unit with Remote
    Evaporator Option
    30 Figure 13
    Dimensions and Weights for
    Remote Evaporator
    33 Figure 14
    Rigging and Lifting Weights for
    RTAA Packaged Unit
    - 130 to 200 Tons Including
    Domestic Water Heater
    34 Figure 15
    Rigging and Lifting Weights for
    RTAA Packaged Unit
    - 240 to 300 Tons
    34 Figure 16
    Rigging and Lifting Weights for
    RTAA Packaged Unit
    - 340 to 400 Tons
    35 Figure 17
    Rigging and Lifting Weights for
    RTAA Outdoor Unit with Remote
    Evaporator Option 
    						
    							6RTAA-IOM-3
    64 Figure 36
    Typical Field Wiring for Outdoor
    Unit with Remote Evaporator
    Option
    70 Figure 37
    Alarm/Running/Maximum
    Capacity Contact Outputs
    72 Figure 38
    Resistor and Potentiometer
    Arrangement for External Chilled
    Water Setpoint
    73 Figure 39
    Resistor and Potentiometer
    Arrangement for External Current
    Limit Setpoint
    78 Figure 40
    Refrigeration System and Control
    Components - Single Circuit
    80 Figure 41
    Refrigeration System and Control
    Components - Duplex Circuit
    81 Figure 42
    Typical RTAA Compressor
    82 Figure 43
    RTAA Compressor Oil System
    Schematic
    83 Figure 44
    Oil Separator
    85 Figure 45
    Fan Configurations - RTAA 130 to
    200 Ton 15 F Minimum Ambient
    86 Figure 46
    Fan Configurations - RTAA 130 to
    400 Ton 0 F Minimum Ambient
    88 Figure 47
    RTAA Control Panel
    - 130 to 200 Tons
    89 Figure 48
    RTAA Control Panel
    - 240 to 300 Tons
    90 Figure 49
    RTAA Control Panel
    - 340 to 400 Tons
    91 Figure 50
    RTAA Control Panel -
    130 to 200 Tons with Remote
    Evaporator Option
    92 Figure 51
    Operator Interface Controls
    93 Figure 52
    Menu Formats
    98 Figure 53
    Condition/Diagnostic Codes
    107 Figure 54
    Low Refrigerant Temperature
    Cutout Ignore Time
    123 Figure 55
    Associated Research Model 45
    Phase Sequence Indicator126 Figure 56
    Unit Sequence of Operation
    - 240 to 400 Tons
    128 Figure 57
    Unit Sequence of Operation
    -130 to 200 Tons
    132 Figure 58
    Operator’s Log
    135 Figure 59
    Chemical Cleaning Configuration
    137 Figure 60
    System Oil Level Specification 
    						
    							7RTAA-IOM-3
    16 Table 1
    General RTAA Mechanical
    Specifications
    17 Table 2
    RTAA Refrigerant Circuit
    Designations and Capacities
    51 Table 3
    RTAA Circuit Capacities
    51 Table 4
    Liquid Line Size for Horizontal and/
    or Downflow Lines
    51 Table 5
    Equivalent Lengths of Non-Ferrous
    Valves and Fittings
    53 Table 6
    Suction Line Size for Horizontal
    and/or Upflow Lines
    53 Table 7
    Suction Line Size for Horizontal
    and/or Downflow Lines
    56 Table 8
    System Refrigerant Charge
    56 Table 9
    Field-installed Piping Charge
    67 Table 10
    Electrical Data
    70 Table 11
    Alarm/Running/Maximum
    Capacity Relay Output
    Configurations
    70 Table 12
    Alarm/Running/Maximum
    Capacity Menu Settings
    72 Table 13
    Input Values vs Extended Chilled
    Water Setpoint Inputs (Ohms)
    73 Table 14
    Input Values vs External Current
    Unit Setpoint
    102 Table 15
    Leaving Fluid Temperature
    Setpoints
    104 Table 16
    Compressor Overload DIP Switch
    Settings
    105 Table 17
    Compressor(s) Current Limit
    Setpoint vs. Chiller Current Limit
    Setpoint (CLS)
    110 Table 18
    Diagnostic and Troubleshooting
    Chart
    List of
    Tables 
    						
    							9RTAA-IOM-3
    Literature Change History
    RTAA-IOM-3 (October 1991)
    Original manual. Covers installation,
    operation, and maintenance of “CO”
    design sequence RTAA-130 thru
    RTAA-400 units.
    Unit Identification
    When the unit arrives, compare all
    nameplate data with ordering and
    shipping information.
    Unit Inspection
    When the unit is delivered, verify that it
    is the correct unit and that it is property
    equipped. Compare the information
    which appears on the unit nameplate
    with the ordering and submittal
    information. Refer to “Nameplates”.
    Note: If the Remote Evaporator Option
    is ordered, the remote evaporator will
    be shipped in a separate crate. The
    serial number on the evaporator
    nameplate must match the serial
    number on the outdoor unit
    nameplate.
    Caution: If the serial numbers on
    the remote evaporator and the
    outdoor unit do not match, do not
    proceed with the installation.
    Notify the appropriate Trane Sales
    Office.
    Inspect all exterior components for
    visible damage. Report any apparent
    damage or material shortage to the
    carrier and make a “unit damage”
    notation on the carrier’s delivery
    receipt. Specify the extent and type of
    damage found and notify the
    appropriate Trane Sales Office.
    Do not proceed with installation of a
    damaged unit without sales off ice
    approval.
    Inspection Checklist
    To protect against loss due to damage
    incurred in transit, complete the
    following checklist upon receipt of the
    unit.
    [ ] Inspect the individual pieces of the
    shipment before accepting the unit.
    Check for obvious damage to the
    unit or packing material.
    [ ] Inspect the unit for concealed
    damage as soon as possible after
    delivery and before it is stored.
    Concealed damage must be
    reported within 15 days.
    [ ] If concealed damage is discovered,
    stop unpacking the shipment. Do
    not remove damaged material from
    the receiving location. Take photos
    of the damage, if possible. The
    owner must provide reasonable
    evidence that the damage did not
    occur after delivery.
    [ ] Notify the carrier’s terminal of the
    damage immediately, by phone and
    by mail. Request an immediate,
    joint inspection of the damage with
    the carrier and the consignee.
    [ ] Notify the Trane sales representative
    and arrange for repair. Do not repair
    the unit, however, until damage is
    inspected by the carrier’s
    representative.
    Loose Parts Inventory
    Check all the accessories and loose
    parts which are shipped with the unit
    against shipping list. Included in these
    items will be water vessel drain plugs,
    rigging and electrical diagrams, and
    service literature, which are placed
    inside the control panel and/or starter
    panel for shipment.
    General
    Information 
    						
    							10RTAA-IOM-3
    Commonly Used
    Acronyms
    Acronyms used in this manual are
    defined below.
    OAT = Outdoor Air Temperature
    BAS = Building Automation System
    BCL = Bidirectional  Communications
    Link
    CAR = Circuit Shutdown, Auto Reset
    CLS = Current Limit Setpoint
    CMR = Circuit Shutdown, Manual
    Reset
    CWR = Chilled Water Reset
    CWS = Chilled Water Setpoint
    DDT = Design  Delta-Temperature
    Setpoint (i.e., the difference
    between entering and leaving
    chilled water temperatures)
    ENT = Entering Chilled Water
    Temperature
    EXV = Electronic Expansion Valve
    FLA = Full Load Amps
    HGBP = Hot Gas Bypass
    HVAC = Heating, Ventilating and Air
    Conditioning
    IFW = Informational - Warning I/O
    Input and Output Wiring
    IPC = Inter-Processor
    Communications
    LRA = Locked Rotor Amps Leaving
    Chilled Water Temperature
    MAR = Machine Shutdown, Auto
    Reset
    MMR = Machine Shutdown, Manual
    Reset
    NEC = National Electric Code
    PCWS = Front Panel Chilled Water
    Setpoint
    PFCC = Power Factor Correction
    Capacitors
    PSID = Pounds-per-Square-inch
    Differential (pressure
    differential)
    PSIG = Pounds-per-Square-inch
    (gauge pressure)
    RAS = Reset Action Setpoint
    RLA = Rated Load Amps
    RCWS = Reset Chilled Water Setpoint
    (CWR)
    RRS = Reset Reference Setpoint
    (CWR)
    SV = Slide Valve
    Tracer
    ® = Type of Trane Building
    Automation System
    SCI = Serial Communications
    Interface
    UCLS = Unit Current Limit Setpoint
    UCM = Unit Control Module
    (Microprocessor-based)
    UCWS= Unit Chilled Water Setpoint
    Unit Description
    The 130 thru 400-ton Model RTAA units
    are helical-rotary type, air-cooled liquid
    chillers designed for installation
    outdoors Depending upon rated
    capacity, the unit will have two, three or
    four compressors. The compressor
    circuits are completely assembled,
    hermetic packages that are factory-
    piped, wired, leak-tested, dehydrated,
    and tested for proper control operation
    before shipment.
    Note: Packaged units are factory
    charged with refrigerant and oil.
    Remote evaporator units are shipped
    with a holding charge of nitrogen and a
    partial charge of oil.
    Figures 1 thru 4 show typical RTAA
    packaged units and their components.
    Figures 5 and 6 show a typical RTAA
    Remote Evaporator outdoor unit and
    evaporator. Tables 1 and 2 contain
    general RTAA mechanical
    specifications. Chilled water inlet and
    outlet openings are covered for
    shipment. Each compressor has a
    separate compressor motor starter.
    The RTAA series features Trane’s
    exclusive Adaptive Control
    ™ logic,
    which monitors the control variables
    that govern the operation of the chiller
    unit. Adaptive Control logic can correct
    these variables, when necessary, to
    optimize operational efficiencies, avoid
    chiller shutdown, and keep producing
    chilled water. An optional remote
    display is available to monitor unit
    operation from a remote location.
    These units feature two independent
    refrigerant circuits. Compressor
    unloaders are solenoid actuated and oil
    pressure operated. Each refrigerant
    circuit is provided with filter drier, sight
    glass, electronic expansion valve, and
    charging valves.
    The shell-and-tube type evaporator is
    manufactured in accordance with
    ASME standards. Each evaporator is
    fully insulated and is equipped with
    water drain and vent connections.
    Packaged units have heat tape
    protection to -200 F. Remote
    evaporators do not have heat tape. 
    						
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