Page 1 Installation Operation Maintenance ® Series R Rotary Liquid Chillers Water-Cooled and Condenserless Packaged Water-Cooled Chiller, RTWA 70-125 Water-Cooled Compressor Chiller RTUA 70-125 Air-Cooled Condenser RTCA 70-125 Models RTWA-70 RTUA-70 RTCA-70 RTWA-80 RTUA-80 RTCA-80 RTWA-90 RTUA-90 RTCA-90 RTWA-100 RTUA-100 RTCA-100 RTWA-110 RTUA-110 RTCA-110 RTWA-125...
Page 2 Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants—including industry replacements for CFCs such as and HCFCs and HFCs.
Page 3: Table Of Contents
Contents General Information ......... . 5 Unit Identification .
Page 4 Contents Unit Voltage Imbalance ........124 Unit Voltage Phasing .
Page 5: General Information
Request an immediate, joint inspection of the damage with the car- rier 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.
Page 6 The RTWA/RTUA series features Trane's exclusive Adaptive Control logic with Clear Language Display. It 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.
Page 7 3340 Width Height 1822 1822 1822 1822 1822 1822 1822 1822 1822 1822 1822 1822 1. Data containing information on two circuits shown as follows: ckt 1/ckt 2. 2. All weights include Y-Delta starters. 3. Trane Part # Oil-31. RLC-SVX07A-EN...
Page 8 Length 2515 2515 2607 2607 3340 3340 Width Height 1822 1822 1822 1822 1822 1822 1. Data containing information on two circuits shown as follows: ckt 1/ckt 2. 2. All weights include Y-Delta starters. 3. Trane Part # Oil-31. RLC-SVX07A-EN...
Page 9: Installation Responsibilities
General Information Table 4 General Data RTAC Air-Cooled Condenser Size Condenser Qty. of Coils Coil Length (In) 156/156 156/156 168/156 168/168 204/168 204/204 Coil Height (In) Number of Rows Condenser Fans Quantity (1) Diameter (In) Total Airflow (CFM) 71750 71750 77640 83530 87505...
Page 10: Nameplates
General Information the heat exchangers for maintenance, and to balance/trim system. • If desired, supply and install flow switches in both the chilled water and condenser water piping; interlock each switch with proper pump starter to ensure unit can only operate if water flow is established. Chilled water flow protection is provided by the Unit Controls without the need for a chilled water flow switch.
Page 11: Model Number Coding System
General Information Figure 1 Nameplates Model Number Coding System The model numbers for the unit and the compressors are comprised of numbers and letter which represent features of the equipment. Each position, or group of positions, in the number is used to represent a feature.
Page 12 General Information The Series R Unit Model Number is as follows: Model Number Digit Number Digit Position 1 2 3 5 6 7 Digit 1-2 Digit 14 Unit Model Agency Listing Rotary Chiller No Agency Listing C-UL Listing Digit Digit 15 Unit Type Control Interface Water Cooled...
Page 13 General Information The Series R Unit Model Number is as follows: Model Number Digit Number Digit Position 1 2 3 5 6 7 Digit 1-2 Digit 13 Unit Model Condenser Coil Fin Material Rotary Chiller Aluminum Complete Coat Digit 3 Copper Fins Unit Type Special...
Page 14: Storage
1. Store the outdoor unit in a secure area. 2. At least every three months (quarterly), check the holding charge to verify that the refrigerant circuits are intact. Contact a qualified service organization and the appropriate Trane sales office if there appears to be a problem. RLC-SVX07A-EN...
Page 15: Installation - Mechanical
Installation - Mechanical Pre-Installation Report any damage incurred during handling or installation to the Trane sales office immediately. An Installation Check Sheet is provided at the end of the Section “Installation - Electrical”. Location Requirements Noise Considerations Locate the RTWA/RTUA unit away from sound sensitive areas. If required, install rubber vibration isolators in all water piping and use flexible electrical conduit.
Page 16: Lifting Procedure
Installation - Mechanical WARNING Heavy Objects! Do not use cables (chains or slings) except as shown. Each of the cables (chains or slings) used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length.
Page 17 Installation - Mechanical Figure 2 Rigging and Lifting for RTWA Units RLC-SVX07A-EN...
Page 18 Installation - Mechanical – Figure 3 Dimension and Clearances for RTWA Unit Standard Length Condensers 70-100 Tons RLC-SVX07A-EN...
Page 19 Installation - Mechanical – Figure 4 Dimension and Clearances for RTWA Unit Long Length Condensers 70-100 Tons RLC-SVX07A-EN...
Page 20 Installation - Mechanical – Figure 5 Dimension and Clearances for RTWA Unit Standard Length Condensers 110-125 Tons RLC-SVX07A-EN...
Page 21 Installation - Mechanical – Figure 6 Dimension and Clearances for RTWA Unit Long Length Condensers 110-125 Tons RLC-SVX07A-EN...
Page 22 Installation - Mechanical Figure 7 Rigging and Lifting for RTUA Units RLC-SVX07A-EN...
Page 23 Installation - Mechanical – Figure 8 Dimension and Clearances for RTUA Compressor Chiller 70-100 Tons RLC-SVX07A-EN...
Page 24 Installation - Mechanical – Figure 9 Dimension and Clearances for RTUA Compressor Chiller 100-125 Tons RLC-SVX07A-EN...
Page 25 Installation - Mechanical Figure 10 Rigging and Lifting for RTCA Condenser RLC-SVX07A-EN...
Page 26 Installation - Mechanical Figure 11 Dimensions and Clearances for RTCA Condenser RLC-SVX07A-EN...
Page 27: Unit Isolation And Leveling
Installation - Mechanical Unit Isolation and Leveling Mounting Construct an isolated concrete pad for the unit or provide concrete footings at each of the four unit mounting points. Mount the unit directly to the concrete pads or footings. Level the unit using the base rail as a reference. The unit must be level within 1/4”...
Page 28 Installation - Mechanical Figure 12 Neoprene Isolator Placement for Typical RTWA Package Units 70-125 Ton RLC-SVX07A-EN...
Page 29 Installation - Mechanical Figure 13 Neoprene Isolator Placement for Typical RTUA Package Units 70-125 Ton RLC-SVX07A-EN...
Page 30 Installation - Mechanical Figure 14 Neoprene Isolator Placement for Typical RTCA Package Units 70-125 Ton RLC-SVX07A-EN...
Page 31: Water Piping
To prevent evaporator or condenser damage, pipe strainers must be installed in the water supplies to protect components from water born debris. Trane is not responsible for equipment-only- damage caused by water born debris. Evaporator Water Piping (for RTWA and RTUA Units Only) Figure 15 illustrates typical evaporator piping components.
Page 32 Installation - Mechanical CAUTION Equipment Damage! To prevent damage to chilled water components, do not allow evaporator pressure (maximum working pressure) to exceed 215 psig. Provide shutoff valves in lines to the gauges to isolate them from the system when they are not in use. Use rubber vibration eliminators to prevent vibration transmission through the water lines.
Page 33: Leaving Chilled Water Piping
Use Piping Strainers! To prevent evaporator or condenser damage, pipe strainers must be installed in the water supplies to protect components from water born debris. Trane is not responsible for equipment-only- damage caused by water born debris. Leaving Chilled Water Piping •...
Page 34 Installation - Mechanical NOTE: The arrow on the switch must point in the direction of flow. 2. To prevent switch fluttering, remove all air from the water system. 3. Adjust the switch to open when water flow falls below nominal. Evapora- tor data is shown in Figure 16.
Page 35 Installation - Mechanical (FT. DROP PRESSURE Figure 16 RTWA/RTUA – Evaporator Water Pressure Drop RLC-SVX07A-EN...
Page 36 Installation - Mechanical (FT. DROP PRESSURE Figure 17 RTWA – Standard Pressure Water Pressure Drop RLC-SVX07A-EN...
Page 37 Installation - Mechanical (FT. DROP PRESSURE Figure 18 RTWA – Long Condenser Water Pressure Drop RLC-SVX07A-EN...
Page 38: Condenser Water Piping (For Rtwa Units Only)
Installation - Mechanical Condenser Water Piping (for RTWA Units Only) Condenser water inlet and outlet types, sizes and locations are given in Figures to Condenser pressure drops are shown in Figures and 18. Condenser Piping Components Condenser piping components and layout vary, depending on the location of connections and the water source.
Page 39: Water Regulations Valve (For Rtwa Units Only)
Installation - Mechanical Figure 19 Typical Well (city) Water Piping Components for Condenser Water Circuit Figure 20 Typical Cooling Tower Water Piping Components for Condenser Water Circuit Water Regulations Valve (for RTWA Units Only) The water regulating valve maintains condensing pressure and temperature by throttling water flow leaving the condenser in response to compressor discharge pressure on the RTWA.
Page 40 Installation - Mechanical Typically, two regulating valves will be required in parallel, each one responding to the refrigerant pressure in its corresponding condenser. Install the valves on the condenser leaving water line. The valves should be located after the thermometer and before the shutoff valve. Refer to Figure 21. Run the capillary tubing from the valve to the discharge service valve and attach it to the non-stem end of the discharge valve access port.
Page 41: Water Treatment
Trane assumes no responsibility for equipment failures which result from untreated or improperly treated water, or saline or brackish water.
Page 42: Refrigerant Relief Valve Venting
Installation - Mechanical coupling and tighten securely by turning the hex nut, on the fitting body only. CAUTION Equipment Damage! Do not tighten the clamping nut at this time. This will prevent proper sensor insertion. 3. Insert the sensor into the compression fitting (through the clamping nut) until the plastic coating on the sensor contacts the top of the clamping nut.
Page 43 Installation - Mechanical CAUTION Equipment Damage! To prevent capacity reduction and relief valve damage, do not exceed vent piping code specifications. Relief valve discharge setpoints are 450 psig. Once the relief valve has opened, it will reclose when pressure is reduced to a safe level. Pipe each relief valve on the unit into a common vent line.
Page 44: Initial Leak Test
Installation - Mechanical CAUTION Equipment Damage! To prevent capacity reduction and relief valve damage, do not exceed vent piping code specifications. Relief valve discharge setpoints are 300 psig. Once the relief valve has opened, it will reclose when pressure is reduced to a safe level. Pipe each relief valve on the unit into a common vent line.
Page 45: Installation - Remote Condenser
Installation - Remote Condenser Remote Air-Cooled Condenser Interconnecting Refrigerant Piping The RTUA compressor chiller is shipped with a full charge of oil, excluding the additional charge for the field piping, and a nitrogen holding charge. The RTCA unit is an air-cooled condenser that is designed for use with the RTUA unit. The RTUA unit is designed to be most effective when used with the RTCA air- cooled condenser.
Page 46 Installation - Remote Condenser RESTRICTIONS: • Total distance between components should not exceed 200 ft. (actual) or 300 ft. (equivalent). • Elevation difference greater than 100 ft. (actual) will result in at least a 2% efficiency decrease. Figure 24 Condenser Above the Compressor /Chiller RESTRICTIONS: •...
Page 47 Installation - Remote Condenser For best reliability and performance, the RTUA should be matched with the Trane RTCA. If a non-RTCA condenser is used, the overall performance and reliability of the RTUA may be affected. Depending on the customer's fan control, nuisance trips may occur on the RTUA unit, due to head pressure instability.
Page 48 Installation - Remote Condenser CAUTION Catastrophic Damage! Tables show line sizing for leaving evaporator water temperatures ranging from 0 F to 60 F. Only units with a “2” or “4” in the 12th digit of the model number of the RTUA unit can be piped using Tables and Unless the RTUA unit is designed for low temperature applications, Table...
Page 49 Reproduced by permission of the Air Conditioning and Refrigeration Institute. Liquid Line Sizing The Trane Company recommends that the liquid line diameter be as small as possible, while maintaining acceptable pressure drop. This is necessary to minimize refrigerant charge. The total length between the components must not exceed 200 actual feet or 300 equivalent feet.
Page 50 Installation - Remote Condenser Table 8 Liquid Line Sizes (O.D.) For Units with Leaving Evaporator Water Temp of 40-60 F with Daytime 40-60 F and Ice Making 35 Ton Circuit (40 - 60F LWT) 40 Ton Circuit (40 - 60F LWT) Liquid Line Size (OD”) Liquid Line Size (OD”) Total...
Page 51 Installation - Remote Condenser Table 9 Liquid Line Sizes (O.D.) For Units with Leaving Evaporator Water Temp of 20-39 F 35 Ton Circuit (20 - 39F LWT) 40 Ton Circuit (20 - 39FLWT) Liquid Line Size (OD”) Liquid Line Size (OD”) Total Total Equiv.
Page 52 Installation - Remote Condenser Table 10 Liquid Line Sizes (O.D.) For Units with Leaving Evaporator Water Temp of 0 -19 F 35 Ton Circuit (0 - 19 F LWT) 40 Ton Circuit (0 - 19 F LWT) Liquid Line Size (OD”) Liquid Line Size (OD”) Total Total...
Page 53 Installation - Remote Condenser Table 11 Maximum Allowable Liquid Line Drainable to the Evaporator (Actual Ft.) CIRCUIT SIZE Liquid Line Size (O.D.) 30 Ton 40 Ton 50 Ton 60 Ton 1 1/8 1 3/8 Table 12 Horizontal or Downflow Discharge Line Sizes (O.D.) 35 Ton Circuit 40 Ton Circuit Total...
Page 54 Figures for details. Refrigerant Sensors If a Trane RTCA condenser is used with the RTUA unit, no sensors need to be field installed. If a non-RTCA condenser is used, an outdoor ambient temperature sensor and a saturated condenser temperature sensor must be installed for the RTUA to control properly.
Page 55 Installation - Remote Condenser NOTE: Failure to properly mount and insulate the saturated condensing refrigerant temperature sensor could cause poor control and/or possible compressor damage. If the sensor cannot be located at the point where the saturated gas enters the subcooler, locate the sensor closer to the subcooler rather than the condenser discharge gas.
Page 56 Calculate the amount of oil to be added, using the following formula: Lbs. of R-22 added Pints of Oil (Trane OIL -31) = for field-installed piping Example Shown in Figure are RTUA 80 ton and RTCA 80 ton units designed for a leaving evaporator water temperature of 42 degrees F .
Page 57 Installation - Remote Condenser New line size for horizontal and downflow lines remains (Table = 1 1/8” HORIZONTAL AND DOWNFLOW LIQUID LINES ARE = 1 1/8” UPFLOW LIQUID LINES ARE = 1 3/8” Figure 26 Example Pipe Size Configuration RLC-SVX07A-EN...
Page 58: Installation - Electrical
For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged.
Page 59 Installation - Electrical Table 16 RTWA Electrical Data Unit Wiring Motor Data Rated Voltage Max. Fuse or Rec Time Delay Compressor (Ea) Unit Size (V/HZ/Phase) MCA (1) HACR (2) or RDE (3) Qty. RLA (4) LRA (6) RTWA 70 200/60/3 105/105 800/800 Std.
Page 60 Installation - Electrical Table 17 RTUA and RTWA High Temp Condenser Electrical Data Unit Wiring Motor Data Rated Voltage Max. Fuse or Rec Time Delay Compressor (Ea) Unit Size (V/HZ/Phase) MCA (1) HACR (2) or RDE (3) Qty. RLA (4) LRA (6) RTUA 70 200/60/3...
Page 61 Installation - Electrical Table 18 RTCA Electrical Data Unit Wiring Fan Motor Data Control KW Rec Time Rotated Voltage Max. Fuse or Delay or Unit Size (V/HZ/Phase) MCA (1) HACR (2) RDE (3) Qty. KW FLA) RTCA 70 200/60/3 39.6 0.75 230/60/3 39.6...
Page 62: Installer-Supplied Components
Installation - Electrical Installer-Supplied Components The installer must provide the following components if not ordered with the unit: • Power supply wiring (in conduit) for all field-wired connections. • All control (interconnecting) wiring (in conduit) for field supplied devices. • Fused-disconnect switches.
Page 63 Installation - Electrical - Low ambient run inhibit - External AUTO/STOP input opened The “RUN:UNLOAD” operating mode commands the compressors to completely unload, which takes about 1/2 minute. This will allow the compressors to be totally unloaded for the next startup. If only the proof of chilled water flow interlock is used, the chiller will shut down on an immediate (non-friendly) shutdown and initiate an automatic reset diagnostic.
Page 64 Installation - Electrical Also, provide a set of auxiliary contacts for condenser water pump starter 5K27 to interlock cooling tower fan starter (5K28) operation (if used) with the condenser water pump starter. This insures that the cooling tower fan runs only when the condenser water pump is operating.
Page 65 Installation - Electrical Table 19 Alarm/Running/Maximum Capacity Relay Output Configurations Relay Output Configuration Contact Outputs RLY 1 = Alarm RLY 2 = Compressor Running RLY 3 = Maximum Capacity RLY 1 = Circuit 1 Alarm RLY 2 = Circuit 2 Alarm RLY 3 = Maximum Capacity RLY 1...
Page 66: Rtwa
Installation - Electrical Table 20 Alarm/Running/Maximum Capacity Menu Settings Diagnostics that the Alarm Relay(s) is Active Relays Output Programmable Configuration Relay Setup Setting MMR/ MAR/ (Service Setting Menu) Table 19 CMR diag. CAR diag. Notes: MMR = Machine Manual Reset CMR = Circuit Manual Reset MAR = Machine Auto Reset CAR = Circuit Auto Reset...
Page 67: Low Voltage Wiring
Installation - Electrical Low Voltage Wiring The remote devices described below require low voltage wiring. All wiring to and from these remote input devices to the UCM, as described below in Paragraphs "Emergency Stop (Normal Trip) on Page" 67 through "Outdoor Air Temperature Sensor on Page"...
Page 68 Installation - Electrical Ice Making Option Ice Machine Control (Operator Setting Menu) must be Enabled. The UCM provides auxiliary control for a customer specified/installed contact closure for ice making. When contact (5K20) is provided, the chiller will run normally when the contact is open. Upon contact closure, the UCM will initiate an ice- building mode, in which the unit runs fully loaded at all times.
Page 69 Installation - Electrical Figure 28 Interconnecting Wiring from RTUA to RTCA RLC-SVX07A-EN...
Page 70 Installation - Electrical Figure 29 Interconnecting Wiring from RTUA to Non-RTCA Condensing Unit RLC-SVX07A-EN...
Page 71 Installation - Electrical Connect leads 501 and 502 from 5K20 to the proper terminals IU2TB1-1 and - 2, as shown in Section "Unit Wiring on Page" 155. Refer to the field diagrams which are shipped with the unit. Silver or gold-plated contacts are recommended. These customer furnished contacts must be compatible with 12 VDC, 45 mA resistive load.
Page 72 Installation - Electrical Table 21 Input Values Vs. External Chilled Water Setpoint Inputs Resulting Chilled Resistance (Ohms) Current (ma) Voltage (Vdc) Water Setpoint (F) 944330 686092 52946 10.0 42434 7 .7 15.0 34889 20.0 29212 10.2 25.0 24785 11.4 30.0 21236 12.6 35.0...
Page 73 Installation - Electrical isolated or “floating” with respect to the UCM chassis ground. Refer to the Section “Unit Wiring”. Figure 31 Resistor and Potentiometer Arrangement for External Current Limit Setpoint If the potentiometer is to be remotely mounted, it and the resistor must be connected to the UCM prior to mounting.
Page 74 Installation - Electrical Table 22 Input Values Vs. External Current Limit Setpoint Inputs Resulting Chilled Resistance (Ohms) Current (ma) Voltage (Vdc) Water Setpoint (%RLA) 49000 29000 19000 13000 10.0 9000 12.0 6143 14.0 7 .0 4010 16.0 2333 18.0 1000 20.0 10.0 Sensor Connections from Non-RTCA Unit to RTWA...
Page 75: Optional Bidirectional Communications Link (Bcl)
For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged.
Page 76 55, 56, 57 , 58, 59 or 60. Each chiller must have a unique address. LonTalk Communication Interface (LCI-C) The Tracer LCI-C interface acts as a translator between Trane's IPC (Inter- Processor Communication) and Echelon's LonTalk® communications protocol (ANSI/EIA/CEA 709.1). This allows the chiller to communicate with building automation systems which also communicate using the LonTalk®...
Page 77: Remote Clear Language Display Installation Procedure
"Local" control mode. The LCI-C module provides connectivity to Trane's Rover® service tool for proper configuration of the LCI-C module. NOTE: LonTalk® communication links are not polarity sensitive.
Page 78 Installation - Electrical Figure 32 Remote CLD Panel Mounting Holes and Electrical Access Knockouts Remote CLD Mounting All mounting hardware (tools, screws, etc.) is to be field supplied. Figure 32 shows the mounting holes in the back of the Remote CLD panel. Also shown are the electrical access knockouts at the bottom and top of the panel.
Page 79 Installation - Electrical NOTE: If an electrical box is to be used, attach it to the display box with screws through the four mounting slots around the knockout. The top of the display box is marked “TOP” . Note the position of the box before mounting it to the surface.
Page 80 Installation - Electrical Terminal strip TB4 is used to wire the second, third, and fourth units to the Remote CLD. TB4 is labeled as shown below: Terminals 1-3 are for the second unit. Terminals 4-6 are for the third unit. Terminals 7-9 are for the fourth unit.
Page 81: Installation Checklist
Installation - Electrical Installation Checklist Complete this checklist as the unit is installed, to verify that all recommended procedures are accomplished before the unit is started. This checklist does not replace the detailed instructions given in the Sections 2 and 3 of this manual.
Page 82 Installation - Electrical terminal strip in the power section of the control panel, if applicable. • Connect power supply wiring to the chilled water pump and condenser water pump, if applicable. • Connect power supply wiring to the RTCA fans, if applicable. •...
Page 83: Operating Principles
Operating Principles RTWA Units This section describes the mechanical operating principles of Series R water- cooled chillers equipped with microcomputer-based control systems. The 70-125-ton Model RTWA units are dual compressor, helical-rotary type water-cooled liquid chillers. The basic components of an RTWA unit are: •...
Page 84 Operating Principles Condenser Evaporator Figure 35 RTWA Refrigeration System and Control Components 1. Discharge Service Valve 11. Filter/Dryer 20. Entering Water Connection 2. Oil Separator 12. Sight Glass 21. Evaporator Entering Water 3. 1/4” Angle Valve 13. Schrader Valve Temp. Sensor 4.
Page 85: Refrigeration (Cooling) Cycle
Operating Principles RTCA Condenser Evaporator Figure 36 RTUA with RTCA Refrigeration System and Control Components 1. Discharge Service Valve 10. Liquid Line Service Valve 19. Temperature Responsive Valve 2. Oil Separator (Backseat Port Upstream) 20. Entering Water Connection 3. 1/4” Angle Valve 11.
Page 86 Operating Principles RTUA With RTCA Cycle Description Figure 36 represents the refrigeration system and control components in a system comprised of an RTUA and an RTCA. Vaporized refrigerant leaves the evaporator and is drawn into the compressor. Here it is compressed and leaves the compressor as a mixture of hot gas and oil (which was injected during the compression cycle).
Page 87: Oil System Operation (Rtwa And Rtua Only)
Operating Principles Compressor Rotors The compressor is a semi-hermetic, direct-drive helical rotary type compressor. Each compressor has two rotors - “male” and “female” - which provide compression. See Figure 37. The male rotor is attached to, and driven by, the motor, and the female rotor is, in turn, driven by the male rotor. Separately housed bearing sets are provided at each end of both rotors.
Page 88 Operating Principles As the oil leaves the separator, it passes through the oil cooler. It then goes through the service valve and filter. At this point it travels through the master oil valve. Then it splits to feed the male load/unload solenoid valves and to provide oil injection and bearing lubrication.
Page 89 Operating Principles the outside air temperature sensor, the saturated condensing refrigerant temperature sensor, and the saturated evaporator refrigerant temperature sensor are monitored to determine fan staging. The number of fans activated at startup is dependant upon the outdoor air temperature. Figure 38 shows fan activation at different temperatures.
Page 90 Operating Principles Figure 38 Fan Staging for RTCA 70 to 125 RLC-SVX07A-EN...
Page 91: Controls Interface
Controls Interface The exclusive Trane Adaptive Control logic with the Clear Language Display is comprised of a system of individual modules located in the control panel of the RTWA and RTUA units. The system consists of six different micropro- cessor-based components, one of which is the Clear Language Display and The processors are: •...
Page 92 Controls Interface Figure 39 Operator Interface Adaptive Control Selected Group Report This group of four keys allows the operator to select and view the following reports: - Custom Report - Chiller Report - Refrigerant Report - Compressor Report The Custom Report is the only report of the four that is defined by the operator.
Page 93 Controls Interface around to the header of the report. When the first item of a report is displayed and the Previous key is pressed, the display will wrap around to the last item. Selected Setpoint Report The first three keys on the second row - Operator Settings, Service Settings and Service Tests - allow the operator to adjust various setpoints and perform various tests.
Page 94 Controls Interface ACTIVE ICE TERMINATION SETPOINT ACTIVE CHILLED WATER SETPOINT The UCM will determine which screen will be displayed after looking at the current Operating Mode. If the Operating Mode is “Ice Making” or “Ice Making Complete” , ACTIVE ICE TERMINATION SETPOINT will be displayed. Otherwise, ACTIVE CHILLED WATER SETPOINT will be shown.
Page 95 Controls Interface RLC-SVX07A-EN...
Page 96 Controls Interface RLC-SVX07A-EN...
Page 97 Controls Interface RLC-SVX07A-EN...
Page 98 Controls Interface RLC-SVX07A-EN...
Page 99 Controls Interface RLC-SVX07A-EN...
Page 100 Controls Interface RLC-SVX07A-EN...
Page 101 Controls Interface RLC-SVX07A-EN...
Page 102 Controls Interface RLC-SVX07A-EN...
Page 103 Controls Interface RLC-SVX07A-EN...
Page 104 Controls Interface RLC-SVX07A-EN...
Page 105 Controls Interface RLC-SVX07A-EN...
Page 106 Controls Interface RLC-SVX07A-EN...
Page 107 Controls Interface RLC-SVX07A-EN...
Page 108 Controls Interface RLC-SVX07A-EN...
Page 109 Controls Interface RLC-SVX07A-EN...
Page 110 Controls Interface RLC-SVX07A-EN...
Page 111 Controls Interface RLC-SVX07A-EN...
Page 112: Diagnostics
Controls Interface Diagnostics If there are no diagnostic messages, the selected menu item will be displayed continuously. If the Diagnostics key is pressed and there are no active diagnostics, the readout on the display will be NO ACTIVE DIAGNOSTICS PRESENT When a system malfunction occurs, one of the following appropriate diagnostic messages will be displayed: ***A MACHINE SHUTDOWN HAS OCCURRED!***...
Page 113: Operational Features
Controls Interface Operational Features Entering Evaporator Water Temperature When one or both compressors are running, the UCM continually monitors and compares the entering and leaving evaporator water temperatures. If the temperature of the entering water drops more than 2 F below the leaving water temperature for more than 100 degree F seconds, the UCM uses this to indicate a loss of water flow through the evaporator.
Page 114 Controls Interface Current Overload Protection The UCM continually monitors compressor current to provide unit protection in the event of an overcurrent or locked rotor condition. Protection is based on the phase with the highest current and, if limits are exceeded, the UCM will shutdown the compressor and will display an MMR diagnostic.
Page 115 Controls Interface The equations for each type of reset are: RETURN WATER TEMPERATURE RESET CWS' = CWS + RESET RATIO [START RESET - (TWE - TWL)] and CWS' > or = CWS and CWS' - CWS < or = MAXIMUM RESET OUTDOOR AIR TEMPERATURE RESET CWS' = CWS + RESET RATIO [START RESET - TOD]...
Page 116 Controls Interface Leaving Water Temperature Cutout This temperature cutout provides protection against freezing caused by low leaving water temperature. The setpoint is both factory set and adjustable from the Service Settings Menu. Temperatures below the setpoint will cause the UCM to accelerate reduction of chiller capacity, even to the point of compressor shutdown.
Page 117 Controls Interface Table 26 Leaving Fluid Temperature Setpoints The leaving chilled water temperature is not the same as the ice termination setpoint. The ice termination setpoint is based on entering chilled water temperature. Therefore, the ice termination setpoint, minus temperature drop across the evaporator while in the ice making mode, equals the leaving chilled water temperature.
Page 118 Controls Interface If the leaving water temperature cutout is set upward, the Clear Language Display will maintain the 15 F minimum and will automatically raise the settings on the front panel and active chilled water setpoints, if necessary. If the front panel or Active Chilled Water Setpoints were adjusted, the display will show the following when the “Enter”...
Page 119 Controls Interface Phase Imbalance Protection The Clear Language Display monitors the current in each phase and calcu- lates the percentage of imbalance as follows: )x 100 – ------------------------------------ - % Imbalance ----------------------------- - = phase with greatest difference from lave (without regard to sign) If Phase Unbalanced Protection (Service Settings Menu) is enabled, and the average three phase current is greater than 80% RLA, and the percent of imbalance is calculated to exceed 15%, the UCM will shutdown the...
Page 120: Dip Switch Settings
Controls Interface DIP Switch Settings Compressor Overload DIP Switches The settings for these switches are shown in Table Table 27 Compressor Overload DIP Switch Settings RTWA (Std. Cond. Temp.) DIP Switch Settings RTWA (Std. Cond. Temp.) DIP Switch Settings Overload Overload Tons VAC/Hz...
Page 121 Controls Interface IPC DIP MODULE SWITCH 1 US — — — 2-10 VDC/4-20 mA Input for External Chilled Water Setpoint (CWS) and Current Limit Setpoint (CLS) When either external CWS or external CLS is used on the optional Module 1U2, DIP switch SW1 positions 1 and/or 2 must be set to accommodate the type of signal source the customer has chosen, either 2-10 VDC or 4-20 mA.
Page 122: Pre-Start Checkout
For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged.
Page 123: Unit Voltage Power Supply
The services of a qualified water treatment specialist should be engaged to determine what treatment, if any, is advisable. The Trane Company warranty specifically excludes liability of corrosion, erosion or deterioration of Trane equipment. Trane assumes no responsibilities for the results of the use of untreated or improperly treated water or saline or brackish water.
Page 124: Unit Voltage Imbalance
Pre-Start Checkout Voltage to the unit must meet the criteria given in Table 16. Measure each leg of the supply voltage at the unit's main power fused-disconnect. If the measured voltage on any leg is not within specified range, notify the supplier of the power and correct the situation before operating the unit.
Page 125 Pre-Start Checkout This direction may be reversed outside the alternator by interchanging any two of the line wires. It is this possible interchange of wiring that makes a phase sequence indicator necessary if the operator is to quickly determine the phase rotation of the motor. Proper compressor motor electrical phasing can be quickly determined and corrected before starting the unit.
Page 126: Water System Flow Rates
Pre-Start Checkout Phase Sea. Lead Terminal Black (Phase A) ..... L1 Red (Phase B) ....... L2 Yellow (Phase C) ....L3 4. Turn power on by closing the unit supply power fused-disconnect switch. 5. Read the phase sequence on the indicator. The “ABC” LED on the face of the phase indicator will glow if phase is “ABC”...
Page 127: Start-Up Procedures
Start-Up Procedures If the pre-start checkout, as discussed above, has been completed, the unit is ready to start. The Clear Language Display is shown in Figure 39 and Clear Language Display Sequence of Operation is shown in Figure 41. Complete each step, in sequence, as follows: •...
Page 128: System Superheat
Start-Up Procedures subcooling is also low. If the operating pressures, sight glass, superheat and subcooling readings indicate a refrigerant shortage, gas-charge refrig- erant into each circuit, as required. With the unit running, add refrigerant vapor by connecting the charging line to the suction service valve and charging through the backseat port until operating conditions become normal.
Page 129 Start-Up Procedures Figure 41 RTWA Unit Sequence of Operation RLC-SVX07A-EN...
Page 130 Start-Up Procedures Figure 42 RTUA Unit Sequence of Operation RLC-SVX07A-EN...
Page 131: Unit Shutdown Procedures
Unit Shutdown Procedures Temporary Shutdown and Restart To shut the unit down for a short time, use the following procedure: 1. Press the Stop key on the Clear Language Display. The compressors will continue to operate and, after unloading for 20 seconds, will stop when the compressor contactors de-energize.
Page 132 Trane assumes no responsibility for equipment failures which result from untreated or improperly treated water, or saline or brackish water.
Page 133: Periodic Maintenance
Periodic Maintenance Perform all maintenance procedures and inspections at the recommended intervals. This will prolong the life of the equipment and minimize the possi- bility of costly failures. Use an “Operator's Log”to record an operating history for the unit. The log serves as a valuable diagnostic tool for service personnel.
Page 134 Periodic Maintenance • Check the refrigerant charge and oil level. Refer to Paragraphs "Weekly Maintenance" on Page 133 "Oil Separator Level Check" on Page 139. Routine changing of oil is not required. • Have a qualified laboratory perform a compressor oil analysis to deter- mine system moisture content and acid level.
Page 135 Periodic Maintenance RTWA/RTUA Operator's Log Job Name: Job Location: Unit Serial Number: Elevation Above Sea Level: Model No: Nameplate Voltage: Compressor A Serial Number: Fan Motor RLA Compressor A Model Number: Heat Tape Voltage Compressor B Serial Number: Compressor B Model Number: Evap Water Pressure Drop Design PSID: Actual PSID:...
Page 136 Periodic Maintenance RTWA & RTUA Log Operator Settings: Set Point Source Low Wtr Temp EXV Gain Comp [D/E] Front Panel Chilled Wtr Setpt Condenser Limit Setpt External Chilled Wtr Setpt [D/E] Phase Unbalance Protection [D/E] Design Delta Temp Setpt Phase Reversal Protection [D/E] Differential To Start Setpt Superheat Setpt Chilled Water Pump [On/Auto]...
Page 137: Maintenance
Maintenance This section describes specific maintenance procedures which must be performed as a part of the normal maintenance program for this unit. Be certain that electrical power to the unit is disconnected before performing these procedures. WARNING Prevent Injury! Position all electrical disconnects in the "OPEN" position and lock them, to prevent injury or death due to electrical shock.
Page 138 To clean the coils, use a soft brush and a sprayer, either a garden, pump-up type or a high-pressure type. A high-quality detergent, such as “Trane Coil Cleaner, CHM-0002” is recommended for standard and Copper coils.Refer to...
Page 139: Water Treatment
Trane assumes no responsibility for equipment failures which result from untreated or improperly treated water, or saline or brackish water.
Page 140 Maintenance Figure 44 System Oil Level Specifications Oil Filter Change NOTE: Routine changing of the oil or the oil filter is not recommended. The oil filter is oversized for this application and should not require replacement. The oil and filter should be replaced only if analysis reveals that the oil is contaminated.
Page 141 Maintenance WARNING Components Under High Pressure! Failure to relieve pressure before removing filter retaining bolt could result in death or serious injury 5. Remove the seven bolts on the oil filter cover. A pan may be necessary to catch any oil that is released after the cover is loosened. NOTE: Observe the placement of the copper gasket under one bolt head.
Page 142 Maintenance NOTE: Insure that this step is performed before Step 15, as this will insure that the oil filter housing is full of oil before the compressor is started. 15. Backseat the suction and discharge service valves. 16. Remove the manifold gauge set. 35 &...
Page 143: Refrigerant Charging
Refrigerant Charging If the refrigerant charge needs to be adjusted, be certain to monitor the subcooling and superheat measurements. The subcooling needs to be between 6 F and 8 F when the unit is running fully loaded. The ambient temperature is between 75 F and 100 F and the leaving water temperature is between 40 F and 55 F .
Page 144: Low Side Repairs
Refrigerant Charging CAUTION Equipment Damage! The evaporator water flow must be established and maintained while adjusting the charge. Refrigerant pressures below 65 psig can cause freezing and rupturing of the evaporator tubes. Low Side Repairs If the refrigerant charge needs to be isolated in the high side of the unit, perform the following procedures: 1.
Page 145 Refrigerant Charging 2. Close the discharge service valve. 3. Before closing the liquid line service valve, attach a manifold gauge set to the liquid line valve backseat port. 4. Close the liquid line service valve. 5. Attach the inlet of a liquid transfer pump to the manifold gauge set and the outlet to the 1/4”...
Page 146: Diagnostics
Diagnostics In the table below, a latching diagnostic is a condition which shall cause the machine or a portion of the machine as noted to shut down and shall require a manual reset to restore operation. A diagnostic that is non-latching shall reset automatically when the condition causing the diagnostic goes away.
Page 147 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Contactor CPRSR A Welded cprsr contactor. Detected a welded compressor contactor when the compressor was commanded off but the current does not go to zero. Detection time shall be 5 second minimum and 10 seconds maximum.
Page 148 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause External Chilled Water Setpoint Not “Enabled”: no diagnostics. “Enabled”: Out-Of-Range Low, set diagnostic. Out-Of-Range Hi, no diagnostic. External Current Limit Setpoint Not “Enabled”: no diagnostics. “Enabled”: Out-Of -Range Low, set diagnostic. Out-Of -Range Hi, no diagnostic.
Page 149 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Low Oil Flow - Cprsr A The differential oil pressure switch remained opened for more than 20 contiguous seconds on Cprsr A. Note: Although GP cmprs do not have pressure switch or Oil Line solenoid, this diagnostic is still active.
Page 150 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Oil System Fault - Ckt 1 Entering Oil Temp on either compressor of the given circuit reads a temperature x degrees below the given ckts' saturated condenser temperature for more than 30 minutes where x is the Oil Loss Differential Setpoint (2 degree F hysterisis to clear timer).
Page 151 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Phase Unbalance - Cprsr D Same as Diagnostic for Cprsr A. Power Loss - Cprsr A The Cprsr was running and all three phases of current were lost. There was an open Transition input after transition had been previously proven to have been complete.
Page 152 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Tracer Communications Loss While the chiller switch was in AUTO/REMOTE the communications between the CSR and the connected remote device, e.g., a Tracer or Remote Display, had either never been established for more than 15 minutes after power up or had been lost for more than 15 minutes after it had been established;...
Page 153 Diagnostics Table 28 Diagnostic Codes Diagnostic Description Type Cause Winding Temp - Cprsr B Same as Diagnostic for Cprsr A, above. Winding Temp - Cprsr C Same as Diagnostic for Cprsr A, above. Winding Temp - Cprsr D Same as Diagnostic for Cprsr A, above. Zone Temp Sensor (Zone Reset Selected) Open or Short.
Page 154 Diagnostics RLC-SVX07A-EN...
Page 155: Unit Wiring
Unit Wiring Typical field connection diagrams, electrical schematics and connection diagrams for 70-125 Ton RTWA, RTUA and RTCA units. NOTE: The typical wiring diagrams in this manual are representative of “X0” design sequence units and are provided only for general reference. These diagrams may not reflect the actual wiring of your unit.
Page 156 3332 RLC-SVX07A-EN...
Page 157 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 158 3333 RLC-SVX07A-EN...
Page 159 REPLACES FILE NUMBER 2D CAD DRAWING NUMBER REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 160 3334 RLC-SVX07A-EN...
Page 161 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 162 3335 RLC-SVX07A-EN...
Page 163 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 164 3336 RLC-SVX07A-EN...
Page 165 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 166 5119 RLC-SVX07A-EN...
Page 167 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 168 5143 RLC-SVX07A-EN...
Page 169 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 170 5144 RLC-SVX07A-EN...
Page 171 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 172 5145 RLC-SVX07A-EN...
Page 173 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 174 5146 RLC-SVX07A-EN...
Page 175 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 176 6008 RLC-SVX07A-EN...
Page 177 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 178 6009 RLC-SVX07A-EN...
Page 179 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 180 5147 RLC-SVX07A-EN...
Page 181 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 182 6526 RLC-SVX07A-EN...
Page 183 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 184 5150 RLC-SVX07A-EN...
Page 185 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 186 6010 RLC-SVX07A-EN...
Page 187 REPLACES FILE NUMBER DRAWING NUMBER 2D CAD REVISION DATE THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS DRAWN BY CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF THE TRANE COMPANY DATE SIMILAR TO RLC-SVX07A-EN...
Page 188: American Standard
Stocking Location Inland www.trane.com Trane has a policy of continuous product data and product improvement and reserves For more information contact your local district the right to change design and specifications without notice. Only qualified office or e-mail us at comfort@trane.com technicians should perform the installation and servicing of equipment referred to in this bulletin.

This manual is also suitable for:

Rtwa-70 Rtua-70 Rtca-70 Rtwa-80 Rtua-80 Rtca-80 ... Show all

Trane R Series Installation Operation & Maintenance

General Information

Installation - Mechanical

Installation - Remote Condenser

Installation - Electrical

Operating Principles

Controls Interface

Pre-Start Checkout

Start-Up Procedures

Unit Shutdown Procedures

Periodic Maintenance

Maintenance

Refrigerant Charging

Diagnostics

Unit Wiring

Quick Links

Related Manuals for Trane R Series

Summary of Contents for Trane R Series

This manual is also suitable for:

Table of Contents