Installation Operation Maintenance Series R® Air-Cooled Rotary Liquid Chillers Packaged Air-Cooled Chiller, RTAA 70-125 Remote Evaporator Air-Cooled Chiller, RTAA 70-125 Models RTAA RTAA-70 RTAA-80 RTAA-90 September 2005 © American Standard Inc.
NOTICE: Warnings and Cautions appear at appropriate sections throughout this literature. Read these carefully. WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices. CAUTION: Indicates a situation that may result in equipment or propertydamage only accidents.
Table of Contents General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Unit Identification - Nameplates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Nameplates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 IPC Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Pre-Start Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Unit Voltage Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Unit Voltage Imbalance . . . . . . . . . . . . . . . . . . . . . . . . .
General Information Unit Identification - Nameplates When the unit arrives, compare all nameplate data with ordering, submittal, and shipping information. A typical unit nameplate is shown in Figure 1. Figure 1 Standatd Unit Nameplate Figure 2 Pump Package Unit Nameplate Nameplates The RTAA outdoor unit nameplates are applied to the exterior of the Control Panel. A compressor nameplate is located on each compressor.
General Information Lists unit test pressures. Identifies installation, operation and maintenance and service data literature. Lists drawing numbers for unit wiring diagrams. Pump Package Information - Optional Compressor Nameplate The compressor nameplate provides following information: Compressor model number. Compressor serial number. Compressor electrical characteristics. Utilization range. Recommended refrigerant.
General Information Unit Description The 70 through 125-ton Model RTAA units are helical-rotary type, air-cooled liquid chillers designed for installation outdoors. The unit has two compressors and the compressor circuits are completely assembled, hermetic packages. They are factory-piped, wired, leak-tested, de-hydrated, and tested for proper operation before shipment. The units are factory charged with refrigerant and oil.
General Information Table 1 General RTAA Mechanical Specifications 70 80 Size 90 100 110 125 2 35/35 2 40/40 2 50/40 2 50/50 2 60/50 2 60/60 (Gallons) 39.8 37.8 34.4 32.1 (Liters) 150.6 143.1 130.2 121.5 Min. Flow (GPM) 84 96 108 120 (L/Sec) 5.3 6.1 6.8 7.6 Max. Flow (GPM) 252 288 324 360 (L/Sec) 15.9 18.2 20.4 22.7 Refer to Pump Package Section for water storage of Pump and accocated piping. 53.4 202.1 132 8.3 396 25.0 45.8 173.4 150 9.5 450 28.
General Information Model Number Coding System The model number for the unit is comprised of numbers and letters which represent features of the equipment. Shown on the chart in Figure 3 are samples of typical unit model numbers, followed by the coding system. Each position, or group of positions, in the number is used to represent a feature. For example, in Figure 3, position 8 of the unit model number, Unit Voltage, contains the number “4”.
Installation — Mechanical Installation Responsibilities Generally, the contractor must do the following when installing an RTAA unit: • Install unit on a flat foundation, level (within 1/4” [6 mm] across the length and width of the unit), and strong enough to support unit loading. • Install unit per the instructions contained in the Installation-Mechanical and Installation-Electrical sections of this manual.
Installation — Mechanical Foundation Provide rigid, non-warping mounting pads or a concrete foundation of sufficient strength and mass to support the outdoor unit operating weight (i.e., including completed piping, and full operating charges of refrigerant, oil and water). Refer to Figure 13 for unit operating weights. Once in place, the outdoor unit must be level within 1/4” (6.4 mm) over its length and width.
Installation — Mechanical Figure 4 12 RTAA Rigging and Lifting Weights – Packaged Unit RTAA-SVX01A-EN
Installation — Mechanical Figure 5 RTAA Rigging and Lifting Weights – Remote Evaporator RTAA-SVX01A-EN 13
Installation — Mechanical Figure 6 14 RTAA Rigging and Lifting Weights –Pump Package Aluminum Fins RTAA-SVX01A-EN
Installation — Mechanical Figure 7 RTAA Rigging and Lifting Weights –Pump Package Copper Fins RTAA-SVX01A-EN 15
Installation — Mechanical Clearances Provide enough space around the outdoor unit to allow the installation and maintenance personnel unrestricted access to all service points. Refer to submittal drawings for the unit dimensions, to provide sufficient clearance for the opening of control panel doors and unit service. Refer to Figure 8, Figure 9 and Figure 12 for minimum clearances. In all cases, local codes which require additional clearances will take precedence over these recommendations.
Installation — Mechanical Lifting Procedure CAUTION Equipment Damage! To prevent damage do not use a forklift to lift or push the unit. Position lifting beam so that cables do not contact the unit. RTAA-SVX01A-EN • Install chains and safety chains through the six lifting plates provided on the unit. • Attach lifting chains or cables to the chains installed above. Each cable alone must be strong enough to lift the chiller. • Attach cables to lifting beam.
Installation — Mechanical Figure 8 18 Dimensions and Clearances for RTAA Packaged Unit 70 – 125 Tons RTAA-SVX01A-EN
Installation — Mechanical Figure 9 Dimensions and Clearances for RTAA with Remote Evaporator 70 – 125 Tons RTAA-SVX01A-EN 19
Installation — Mechanical Figure 10 20 Remote Evaporator Dimensions, RTAA 70 – 125 Tons RTAA-SVX01A-EN
Installation — Mechanical Figure 11 Remote Evaporator Dimensions, RTAA 110 – 125 Tons RTAA-SVX01A-EN 21
Installation — Mechanical Figure 12 22 Dimensions and Clearances for RTAA with Pump Package 70 – 125 Tons RTAA-SVX01A-EN
Installation — Mechanical Unit Isolation There are two mounting methods that will minimize sound and vibration problems. They are the direct-mount method and the isolator-mount method. Direct Mounting The unit can be direct-mounted on an isolated concrete pad or on isolated concrete footings at each mounting location. Refer to Figure 13 for unit operating weights. A mounting hole is provided in the base of the unit frame at each mounting location.
Installation — Mechanical Figure 13 24 Isolator Placement for Typical RTAA Packaged Unit 70 – 125 Tons RTAA-SVX01A-EN
Installation — Mechanical Figure 14 Isolator Placement for RTAA with Remote Evaporator RTAA-SVX01A-EN 25
Installation — Mechanical Evaporator Water Piping Figure 15 illustrates typical evaporator piping components. Components and layout will vary slightly, depending on the location of connections and the water source. CAUTION Evaporator Damage! The chilled water connections to the evaporator are to be “victualic” type connections. Do not attempt to weld these connections, as the heat generated from welding can cause internal damage to the evaporator.
Installation — Mechanical 6ALVED 0RESSURE 'AUGE 6ENTS 2ELIEF 6ALVE 5NION $RAIN Figure 15 5NION 6IBRATION %LIMINATOR &LOW 3WITCH /PTIONAL 6IBRATION %LIMINATOR 7ATER 3TRAINER 'ATE 6ALVE 'ATE 6ALVE "ALANCING 6ALVE Suggested Piping for Typical RTAA Evaporator Evaporator Piping Components “Piping components” include all devices and controls used to provide proper water system operation and unit safety. These components and their general locations are given below.
Installation — Mechanical CAUTION Evaporator Damage! To prevent evaporator damage, do not exceed 215 psig (14.6 bar) evaporator water pressure. Evaporator Drain A 3/4” drain connection is located under the outlet end of the evaporator. This may be connected to a suitable drain to permit evaporator drainage during unit servicing. A shutoff valve must be installed on the drain line.
Installation — Mechanical Figure 16 RTAA Evaporator Water Pressure Drop Water Treatment Using untreated or improperly treated water in these units may result in inefficient operation and possible tube damage. Consult a qualified water treatment specialist to determine whether treatment is needed. Customer Note The use of improperly treated or untreated water in this equipment may result in scaling, erosion, corrosion, algae or slime.
Installation — Mechanical Water Pressure Relief Valves Install a water pressure relief valve in the evaporator inlet piping between the evaporator and the inlet shutoff valve, as shown in Figure 15. Water vessels with close-coupled shutoff valves have a high potential for hydrostatic pressure buildup on a water temperature increase. Refer to applicable codes for relief valve installation guidelines.
Installation — Remote Evaporator The RTAA outdoor unit with the remote evaporator option is shipped as two pieces: the outdoor unit (condenser) and the evaporator. Short suction line connections are provided with the outdoor condensing unit. The liquid line connections are at the end opposite the control panel. The remote evaporator is shipped complete with factory-mounted refrigeration specialties (electronic expansion valves, sight-glasses and removable core filter-dryers).
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Installation — Remote Evaporator /LTXLG 7UDS +HLJKW HTXDO WR 7RS RI &RQGHQVHU &RQGHQVHU &RLO /LTXLG /LQH 6XFWLRQ /LQH &RPSUHVVRU ¶ 0D[LPXP (;9 6LJKW *ODVV Figure 19 )LOWHU 'ULHU Remote Evaporator Installation Condensing Unit Above Evaporator – 100 Feet or Less (;9 6LJKW *ODVV 5HPRWH (YDSRUDWRU 5HPRWH (YDSRUDWRU )LOWHU 'ULHU ¶ 0D[LPXP Figure 20 &RQGHQVHU &RLO /LTXLG /LQH 6XFWLRQ /LQH &RPSUHVVRU Remote Evaporator Installation Condensing Unit Below Evaporator – 15 Feet or Less (Suction accumu
Installation — Remote Evaporator 1. The remote evaporator MUST be matched with its respective outdoor condensing unit. 2. The circuit number on the outdoor condensing unit must match the circuit number on the evaporator, i.e. circuit #1 on the outdoor condensing unit must be connected with circuit # 1 on the remote evaporator and likewise for circuit # 2. See Figure 21 for circuit number identification. RTAA Circuit Capacities are shown in Table 2.
Installation — Remote Evaporator Table 2 RTAA Circuit Capacities (nominal tons) Model Circuit 1 Circuit 2 70 35 35 80 40 40 90 50 40 100 50 50 110 60 50 125 60 60 Table 3 Equivalent Lengths of Non-Ferrous Valves and Fittings (feet) Line Size Inches OD Globe Valve Short Angle Valve Short Radius Long Radius ELL ELL 1-1/8 87 29 2.7 1.9 1-3/8 102 33 3.2 2.2 1-5/8 115 34 3.8 2.6 2-1/8 141 39 5.2 3.4 2-5/8 159 44 6.5 4.2 3-1/8 185 53 8 5.
Installation — Remote Evaporator . Table 4 Liquid Line Sizes Total Equiv. Length (ft.) 35 Ton Circuit Liquid Line Size (OD”) Horizontal or Upflow Upflow Downflow 1-5 ft. 6-10 ft. 25 50 75 100 125 150 175 200 225 250 275 300 1.125 1.125 1.125 1.125 1.125 1.125 1.125 1.125 1.125 1.125 1.125 1.375 Total Equiv. Length (ft.) 50 Ton Circuit Liquid Line Size (OD”) Horizontal or Upflow Upflow Downflow 1-5 ft. 6-10 ft. 25 50 75 100 125 150 175 200 225 250 275 300 1.125 1.125 1.125 1.125 1.125 1.125 1.
Installation — Remote Evaporator . Table 6 Suction Line Sizes (“O.D.”) for Horizontal and/or Downflow Lines Circuit Size: Total Equiv. Length (ft.) 35 Ton 40 Ton 50 Ton 60 Ton 25 50 75 100 125 150 175 200 225 250 275 300 2.125 2.125 2.125 2.125 2.125 2.625 2.625 2.625 2.625 2.625 2.625 2.625 7. 2.125 2.125 2.125 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 2.625 3.125 3.125 2.625 2.625 2.625 2.625 2.625 2.625 3.125 3.125 3.125 3.125 3.
Installation — Remote Evaporator Line Sizing To determine the appropriate outside diameter for field installed liquid and suction lines, it is first necessary to establish the equivalent length of pipe for each line. It is also necessary to know the capacity (tons) of each circuit. Circuit capacities for each RTAA unit are listed in Table 2. Liquid Line Sizing Steps Line sizing is an iterative process.
Installation — Remote Evaporator Table 7 Additional Suction Accumulator Line Required Length in Feet of Field Installed Suction Line Accumulator 35 Ton Circuit 40 Ton Circuit 50 Ton Circuit 60 Ton Circuit Liquid Line 2 1/8" O.D. 2 5/8" O.D. 2 1/8" O.D. 2 5/8" O.D. 2 5/8" O.D. 3 1/8" O.D. 2 5/8" O.D. 31/8"O.D. Length in Suction Suction Suction Suction Suction Suction Suction Suction Actual Ft.
Installation — Remote Evaporator 9. From Table 4, for a 50 ton circuit, for 125 equivalent feet (also nearest to 128.2 feet), the OD is still: Horizontal or Downflow = 1 1/8 inches 10. From 22, there is 8 feet of up-flow on the liquid line inverted trap.
Installation — Remote Evaporator column find the outside diameter that corresponds to the equivalent length computed in step #6. 8. Use Table 3 and the diameter found in step #7 to determine the equivalent lengths of each fitting. 9. Sum the following: equivalent lengths of the fittings from step #8, the actual length of the horizontal or downflow suction line, and the equivalent length of the upflow line found in step # 4. This is the new estimate of the equivalent length of the entire suction line. 10.
Installation — Remote Evaporator Suction Accumulator Sizing Installations similar to those in Figure 18 and 20 will require that the suction accumulator be extended at least by the amount shown in 7. The suction accumulator length in feet is dependent upon: circuit tonnage, suction line O.D., and actual liquid line length. The following example uses Figure 23 and assumes a 50 ton circuit with a 2-5/8 inch O.D. suction line.
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Installation — Remote Evaporator Piping Installation Procedures The outdoor unit and the evaporator are shipped with a 25 psig holding pressure of dry nitrogen. Do not relieve this pressure until field installation of the refrigerant piping is to be accomplished. This will require the removal of the temporary pipe caps. NOTE: Use Type L refrigerant-grade copper tubing only. The refrigerant lines must be isolated to prevent line vibration from being transferred to the building.
Installation — Remote Evaporator Figure 24 Refrigerant Sensor Mounting and Wiring RTAA-SVX01A-EN 45
Installation — Remote Evaporator Leak Test and Evacuation After installation of the refrigerant piping, thoroughly test the system for leaks. Pressure test the system at pressures required by local codes. Immediately before evacuation, install the liquid line filter cores. These will be shipped with the evaporator. NOTE: Do not install these before the circuit is ready for evacuation, as the cores will absorb moisture from the atmosphere.
Installation — Remote Evaporator Oil Charge Determination The unit is factory charged with the amount of oil required by the system, without the field-installed piping. The amount of additional oil required is dependent upon the amount of refrigerant that is added to the system for the field-installed piping.
Installation — Remote Evaporator The relief valves are 3/8” SAE flare connections. They have a 300 psig relief setpoint, and relieve at 10.21 lba/min. The connection size and locations are shown in the chiller's submittals. Refer to local codes for relief valve vent line sizing information.
Installation — Electrical General Recommendations All wiring must comply with local and National Electric Codes. Minimum circuit capacities and other unit electrical data is on the unit nameplate. See the unit order specifications for actual electrical data. Electrical schematics are shipped with the unit. Typical wiring diagrams are in the back of this manual. WARNING Hazardous Voltage w/Capacitors! Disconnect all electric power, including remote disconnects before servicing.
Installation — Electrical Table 10 Electrical Data Unit Wiring Unit Size RTAA 70 RTAA 80 RTAA 90 RTAA 100 RTAA 110 RTAA 125 Motor Data Rec Time Rotated Compressor Fans (Ea) Control Delay or Voltage MCA (2) MOP (1) RDE (3) Qty. (Ea) RLA (4) LRA (7) Qty.
Installation — Electrical Table 11 Electrical Data - Pump Package Option Unit Wiring Motor Data Rec Time Fans Rotated Pump Pump Delay or Comp(Ea) (Ea) Control Unit Size Voltage HP LRA (7) Qty KW FLA KW (6) FLA MCA (2) MOP (1) RDE (3) Qty RLA (4) 3.1 136 175 150 2 50/50 330/330 8 1.0 2.5 0.75 RTAA 70 460/60 2 460/60 460/60 RTAA 80 460/60 460/60 460/60 460/60 RTAA 90 460/60 460/60 460/60 RTAA 100 460/60 460/60 460/60 RTAA 110 460/60 460/60 460/60 RTAA 125 460/60 460/60 460/60 3 5 2 3 5 7.5 3 5 7.5 3 5 7.
Installation — Electrical Power Supply Wiring All power supply wiring must be sized and selected accordingly by the project engineer in accordance with the National Electrical Code. All wiring must comply with local codes and the National Electrical Code. The installing (or electrical) contractor must provide and install the system interconnecting wiring, as well as the power supply wiring. It must be properly sized and equipped with the appropriate branch circuit protection.
Installation — Electrical minute. This will allow the compressor to be totally unloaded for the next start-up. 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. Figure 25 shows a typical interlock of an RTAA chiller. There are three points (six wires) on the chiller that are required to be connected. 1. External Auto/Stop (Terminals 1U1 TB3-3 and -4).
Installation — Electrical Alarm/Running/Maximum Capacity Outputs Terminals 1 to 7 on terminal strip TB4 of the 1U1 board provide a variety of contact outputs. These are dependent upon the setting of Programmable Relay Setup (“Service Setting Menu”) and its relationship to diagnostics, compressors operating and the system operating at full capacity. As shown in Figure 26, there are three relays. Relay 1 has SPDT contacts. Relays 2 and 3 have SPST normally-open contacts.
Installation — Electrical 7% 8 5HOD\ . 5HOD\ . 5HOD\ . + 1 &XVWRPHU SURYLGHG 9$& SRZHU 0D[ IXVH VL]H DPSV Figure 26 Alarm/Running/Maximum Capacity Contact Outputs Table 13 Alarm/Running/Maximum Capacity Menu Settings Diagnostics that the Alarm Relay(s) is Active Programmable Relay Setup Setting (Service Setting Menu) Relays Output Configuration (Table 12) MMR/ CMR diag. MAR/ CAR diag.
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 must be made with shielded, twisted-pair conductors. Be sure to ground the shielding only at the Clear Language Display. See Wiring Section for the recommended conductor sizes. Emergency Stop (Normal Trip) The Clear Language Display provides auxiliary control for a customer specified/ installed latching tripout.
Installation — Electrical reentered until the unit has been switched out of ice-building mode (open 5K20 contacts) and then switched back into ice building mode (close 5K20 contacts). In ice-building, the current setpoint will be set at 120%. For example, if the Front Panel or External Current Limit setpoint is set to 80%, in ice-building the Active Current Limit is 120%.
Installation — Electrical 2. Isolated 2-10 VDC Voltage Source Input. Set DIP Switch SW1-1 of Options Module 1U2 to “OFF”. Connect the voltage source to terminals TB1-4 (+) and TB1-5 (-) on Options Module IU2. CWS is now based on the following equation: CW Setpoint °F = (VDC x 125) - 16.25 Sample values for CWS vs. VDC signals are shown in Table 14. Minimum setpoint = Maximum setpoint = Maximum continuous input voltage = Input impedance (SW1-1 on) = 0 F(2.0 VDC input) 65 F (9.4 VDC input) 15 VDC 40.
Installation — Electrical External Current Limit Setpoint (CLS) This option allows the external setting of the Current Limit Setpoint, independent of the Front Panel Current Limit Setpoint, by one of three means: 1. A remote resistor/potentiometer input (fixed or adjustable). 2. An isolated voltage input 2-10 VDC. 3. An isolated current loop input 4-20 mA.
Installation — Electrical Table 15 Input Values Vs. External Current Limit Setpoint Inputs Resistance (Ohms) Current (ma) Voltage (Vdc) Resulting Chilled Water Setpoint (%RLA) 49000 4.0 2.0 40 29000 6.0 3.0 50 19000 8.0 4.0 60 13000 10.0 5.0 70 9000 12.0 6.0 80 6143 14.0 7.0 90 4010 16.0 8.0 100 2333 18.0 9.0 110 1000 20.0 10.0 120 2. 2-10 VDC Voltage Source Input. Set DIP Switch SW1-2 of Options Module 1U2 to “OFF”.
Installation — Electrical controller or a remote display panel. A shielded, twisted-pair connection establishes the bidirectional communications link between the unit control panel and the Tracer, multiple-machine controller or remote display panel. NOTE: The shielded, twisted-pair conductors must run in a separate conduit. Field wiring for the communication link must meet the following requirements: 1. All wiring must be in accordance with the NEC and local codes. 2.
Installation — Electrical Remote Clear Language Display Installation Procedure The Remote CLD is intended for indoor use and is not weatherproof. It is mounted in a molded-plastic display box with a molded rubber keypad. Although this is not the same as the membrane keypad of the unit's CLD, the key locations and labels are identical. Field wiring for the communication link must meet the following requirements: 1. All wiring must be in accordance with NEC and all local codes. 2.
Installation — Electrical The microprocessing board can now be replaced in the display box with its four attaching screws. Figure 29 Remote CLD Panel Mounting Holes and Electrical Access Knockouts Remote CLD Panel Wiring The Remote CLD requires a 24 VAC power source and a shielded, twistedpair wire between the panel and the Clear Language Display. See Figure 30.
Installation — Electrical -AX #UT BACK BARE SHIELD WIRE 7RAP TAPE AROUND EXPOSED FOIL SHIELD AND BARE SHIELD WIRE Figure 30 #ONNECT LEADS TO 2EMOTE #,$ 0ANEL Shielded, Twisted Pair Communication LInk at the Remote CLD Panel Connect the 24 VAC power supply to terminals J2A and J2B in the Remote CLD panel. The polarity of the power source is not a concern, but the power source must be grounded to terminal J2Gnd.
Installation — Electrical Figure 31 RTAA-SVX01A-EN Remote Display Panel Interconnecting Wiring 65
Operating Principles This section describes the mechanical operating principles of Series R air-cooled chillers equipped with microcomputer-based control systems. The 70 - 125-ton Model RTAA units are dual-compressor, helical-rotary type air-cooled liquid chillers. The basic components of an RTAA unit are: • Clear Language Display. • Unit Control Modules (UCM). • Unit-mounted panel. • Helical-rotary compressor. • Direct Expansion evaporator. • Air-cooled condenser.
Operating Principles &RQGHQVHU (YDSRUDWRU Figure 32 1. RTAA Refrigeration System and Control Components Discharge Service Valve 2. Oil Separator 3. 1/4" Angle Valve 9. Subcooler 10. Low Pressure Switch 11. Liquid Line Service Valve (Backseat Port Upstream) 12. Schrader Valve 13. Filter/Dryer 4. Oil Cooler 5. Quick Connect Shutoff Valve or Angle Valve 6. Oil Temperature Sensor 14. Sight Glass 7. Condenser 8.
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 33 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. The helical rotary compressor is a positive displacement device.
Operating Principles Compressor load capacity is determined by the positions of the unloader valves. They divert refrigerant gas from the rotors to the compressor suction, thus unloading the compressor. This varies the compressor capacity to match the load and reduces the KW draw of the compressor motor. The two-position female unloader will fully open or fully close a port on the rotor housing, at the discharge end of the female rotor.
Operating Principles Compressor Bearing Oil Supply Oil is injected into the bearing housings located at each end of both the male and female rotors. Each bearing housing is vented to compressor suction, so that oil leaving the bearings returns through the compressor rotors to the oil separator. Compressor Rotor Oil Supply Oil flows through this circuit directly from the master oil valve, through the oil filter to the top of the compressor rotor housing.
Operating Principles B ! &21752/ 3$1(/ psid and 349 psid. The UCM will allow the unit to remain on-line if there is no increase in pressure for a one hour period. Otherwise, the unit will trip off-line and display the “High Differential Pressure” diagnostic.
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. The system consists of six different microprocessor-based components. The processors are: • Clear Language Display - 1U6. • Chiller Module - 1U1. • Communication and Setpoint Reset Option Module - 1U2. • Expansion Valve Module - 1U3. • Compressor Module (one per compressor) - 1U4, 1U5. • Remote Display Buffer Option Module - 1U7.
Controls Interface Figure 35 Operator Interface Adaptive Control Select Report Group 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. Any display under the other three reports can be added to the Custom Report by pressing the plus key while the desired read-out is on the display.
Controls Interface The Next key and Previous key allow the operator to scroll up and down through the display items listed under the report menus. When the last item of a report is displayed and the Next key is pressed, the display will wrap 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.
Controls Interface Press Chiller Report to display the header Press Next to display MODE: OPERATING MODE] REQUESTED SETPOINT SOURCE: [SETPT SOURCE] Press Next to display COMPRESSOR ON CIRCUITS LOCKED OUT Press Next to display ACTIVE ICE TERMINATION SETPOINT Or 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.
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Controls Interface Diagnostics If there are no diagnostic messages, the selected menu item will be displayed continuously.
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. This will shut down that circuit's compressor and will display an MMR diagnostic.
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.
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] and CWS' > or = CWS and CWS' - CWS < or = MAXIMUM RESET CWS' is the new chilled water setpoint. CWS is the active chilled water setpoint before any reset has occurred. RESET RATIO is a user adjustable gain.
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. A non-latching diagnostic will be generated if the LWT is below the cutout for more than 30 degree F seconds.
Controls Interface Table 17 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.
Controls Interface Low Refrigerant Temperature Cutout and Low Pressure Cutout Retry If the LRTC or LPC trips despite the low ambient temperature start logic, the circuit will be permitted to shutdown and retry one time. If the LRTC or LPC trips within the first 20 minutes after initial start but after the low ambient ignore time (grace period), the compressor stops immediately and the Restart Inhibit timer is set to one minute. After time expires, the compressor will reset if there is a call for cooling.
Controls Interface ( l1 + l2 + l3 ) l ave = ----------------------------3 1 x = 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 compressor and display a CMR diagnostic.
Controls Interface Table 18 Compressor Overload DIP Switch Settings RLA Primary Turns Through Current Transformer Current Transformer Extension* Overload Setting Dip Sw/Decimal12345** 200/60 115 1 -02 01011/11 Compressor Tons Volts/Hz 35 40 50 60 230/60 100 1 -01 11111/31 346/50 58 1 -10 01100/12 380/60 61 1 -10 10000/16 400/50 50 1 -10 00000/0 460/60 50 1 -10 00000/0 575/60 40 1 -09 01111/15 200/60 142 1 -02 11011/27 230/60 124 1 -02 10001/17 346/50
Controls Interface Mechanical Control Settings The settings for the High Pressure switch, Oil Pressure switch, and Winding Thermostat are shown below: CLOSE OPEN Compressor Discharge High Pressure Switch – PSIG 300 ±20 405 ±7 Compressor Motor Winding Thermostat – F 181 221 Low Pressure Cutout 22 ±4 7 ±4 Remote CLD Operation With only few exceptions, operation of the Remote CLD is identical to the unit's CLD. To ease the operation of the Remote CLD, additional displays have been added.
Pre-Start Checkout When installation is complete, but prior to putting the unit into service, the following pre-start procedures must be reviewed and verified correct: WARNING Hazardous Voltage w/Capacitors! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.
Pre-Start Checkout the unit does not have the optional control power transformer, 115 VAC power must be field supplied to terminals 1TB3-1 AND 1TB3-2. Press the Stop key on the Clear Language Display. CAUTION Compressor Damage! The compressor sump heaters must be energized for a minimum of 24 hours prior to unit operation, to prevent compressor damage caused by liquid refrigerant in the compressor at start-up. • Energize the evaporator heat tape. • Fill the evaporator chilled water circuit.
Pre-Start Checkout Unit Voltage Power Supply WARNING Live Electrical Components! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
Pre-Start Checkout Unit Voltage Phasing It is important that proper rotation of the compressors be established before the unit is started. Proper motor rotation requires confirmation of the electrical phase sequence of the power supply. The motor is internally connected for clockwise rotation with the incoming power supply phased A, B, C. Basically, voltages generated in each phase of a polyphase alternator or circuit are called phase voltages.
Pre-Start Checkout CAUTION Compressor Damage! Do not interchange any load leads that are from the unit contactors or the motor terminals. 7. Reopen the unit disconnect and disconnect the phase indicator. Water System Flow Rates Establish a balanced chilled water flow through the evaporator. The flow rates should fall between the minimum and maximum values given in Table 1.
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 35 and Clear Language Display Sequence of Operation is shown in Figure 1. Complete each step, in sequence, as follows: • Press the Stop key on the Clear Language Display. • As necessary, adjust the setpoint values in the Clear Language Display menus, as describe in “Clear Language Display Key Pad Overview”.
Start-Up Procedures refrigerant charge or excessive pressure drop in the liquid line. A restriction in the line can sometimes be identified by a noticeable temperature differential between the two sides of the restriction. Frost may form on the line at this point. Proper refrigerant charges are shown in Table 1. CAUTION Equipment Check! A clear sight glass alone does not mean that the system is properly charged. Also check system superheat, subcooling, and unit operating pressures.
Start-Up Procedures Figure 37 110 Unit Sequence of Operation RTAA-SVX01A-EN
Start-Up Procedures • A shortage of refrigerant is indicated if operating pressures are low and subcooling is also low. If the operating pressures, sight glass, superheat and subcooling readings indicate a refrigerant shortage, gas-charge refrigerant 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.
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. The condenser fans will be deenergized at this time. 2. The unit disconnect switch and unit-mounted disconnect (if installed) should remain closed to keep the compressor sump heaters energized. 3.
Unit Shutdown Procedures CAUTION Accidental Start-up Damage! Lock the disconnects on the “OPEN” position to prevent accidental start-up and damage to the system when it has been setup for extended shutdown. 5. At least every three months (quarterly), check the pressure in the unit to verify that the refrigerant charge is intact. System Restart After Extended Shutdown Follow the procedures below to restart the unit after extended shutdown: 1.
Unit Shutdown Procedures CAUTION Proper Water Treatment! The use of untreated or improperly treated water in a RTAA may result in scaling, erosion, corrosion, algae or slime. It is recommended that the services of a qualified water treatment specialist be engaged to determine what water treatment, if any, is required. Trane assumes no responsibility for equipment failures which result from untreated or improperly treated water, or saline or brackish water. 6.
Periodic Maintenance Perform all maintenance procedures and inspections at the recommended intervals. This will prolong the life of the equipment and minimize the possibility 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. By observing trends in operating conditions, an operator can anticipate and prevent problem situations before they occur.
Periodic Maintenance • Manually rotate condenser fans to insure proper clearance on the fan openings. Annual Maintenance 116 • Perform all weekly and monthly maintenance procedures. • Check the oil level and refrigerant charge. Refer to “Maintenance Procedures”. Routine changing of oil is not required. See Oil Separator Level Check in the Maintenance section of this manual. • Have a qualified laboratory perform a compressor oil analysis to determine system moisture content and acid level.
Periodic Maintenance RTAA Operator's Log Job Name: Unit Serial Number: Model No: Compressor A Serial Number: Compressor A Model Number: Compressor B Serial Number: Compressor B Model Number: Evap Water Pressure Drop Design PSID: Design GPM: Circuit Compressor Unit Voltage Phase Compressor Amps Phase Unit Operating Mode Last Diagnostic Evaporator Entering Water Temp. Evaporator Leaving Water Temp. Outdoor Air Temperature Active Chill Water Setpoint Active Current Limit Setpoint Saturated Evaporator Rfgt.
Periodic Maintenance RTAA 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] EXV Control Response Ckt 1 Chilled Water Pump Off Delay EXV Control Response Ckt 2 Front Panel Current Limit Setpt LVG Wtr Temp Cntrl Resp Setpt Exter
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. Coil Cleaning WARNING Hazardous Chemicals! Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required.
Maintenance Chemically Cleaning The Evaporator The chilled water system is a closed-loop and therefore should not accumulate scale or sludge. If the chiller becomes fouled, first attempt to dislodge the material by backflushing the system. If unsuccessful after several attempts, chemically clean the evaporator. CAUTION Equipment Damage! Do not use an acid type cleaning agent that will damage steel, galvanized steel, polypropylene, or internal copper components.
Maintenance 4. After the level has been determined, remove the sight glass and hoses. &RPSUHVVRU %DFNVHDW 3RUW RQ 'LVFKDUJH 2LO 6HSDUDWRU ´ 0D[LPXP 2LO /HYHO ³ ´ 1RPLQDO 2LO /HYHO 0LQLPXP 2LO /HYHO 5HIULJHUDQW /LTXLG /LQH 6LJKWJODVV SXUFKDVHG ORFDOO\ Figure 39 9DOYH ´ 5HIULJHUDWLRQ +RVH System Oil Level Specifications Oil Filter Change NOTE: Routine changing of the oil or the oil filter is not recommended.
Maintenance 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 copper gasket under one bolt head. 6. Remove the cover and oil filter element.Install the new filter element. 7. Coat the new cover gasket with refrigerant oil. 8. Install the cover plate and cover plate gasket. 9. Install a new copper gasket under the same bolt head that had one at time of removal.
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Maintenance 35 & 40 Ton Compressor Oil Filter Replacement Chart 20 Oil Filter Pressure Drop (PSID) 18 16 14 12 10 8 6 4 Normal Pressur Drop 2 Maximum Pressure Drop 0 50 100 150 200 250 300 Condensing Pressure - Suction Pressure (PSID) 50 & 60 Ton Compressor Oil Filter Replacement Chart 40 Oil Filter Pressure Drop (PSID) 35 30 25 20 15 10 Normal Pressur Drop 5 Maximum Pressure Drop 0 50 100 150 200 250 300 Condensing Pressure - Suction Pressure (PSID) Figure 41 124 Oil Pressure Drop
Refrigerant Charging and Recovery If the refrigerant charge needs to be adjusted, be certain to monitor the subcooling and superheat measurements. The subcooling needs to be between 10 F and 20 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. Refer to Figures 1, 2 and 21. CAUTION Equipment Damage! The evaporator water flow must be established and maintained while adjusting the charge.
Refrigerant Charging and Recovery 10. Open all valves, start the unit and verify the refrigerant charge by measuring the subcooling. High Side Repair If the refrigerant needs to be isolated in the low side of the unit, perform the following procedures: 1. Press the STOP key and send the unit through a stopping mode. 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.
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. A nonlatching diagnostic shall shut down the machine or a part of the machine if so indicated.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Contactor CPRSR A MMR a. b. Contactor CPRSR B MMR Same as CPRSR A. Contactor CPRSR C MMR Same as CPRSR A. Contactor CPRSR D MMR Same as CPRSR A. CPRSR Suct Temp Sensor - Ckt 1 CMR Open or short. CPRSR Suct Temp Sensor - Ckt 2 CMR Open or short. CWS/Leaving Water Temp Cutout Setpoint Overlap None No diagnostic, display to flash and 1imit value to last legal value. Welded cprsr contactor.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause External Chilled Water Setpoint IFW a. b. Not “Enabled”: no diagnostics. “Enabled”: Out-Of-Range Low, set diagnostic. Out-Of-Range Hi, no diagnostic. External Current Limit Setpoint IFW a. b. Not “Enabled”: no diagnostics. “Enabled”: Out-Of -Range Low, set diagnostic. Out-Of -Range Hi, no diagnostic. EXV Elec.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Low Oil Flow - Cprsr A CMR 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. The input must be jumpered for normal operation on GP cmprs. Low Oil Flow - Cprsr B CMR Same as Diagnostic for Cprsr A, above, but Cprsr B.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Oil System Fault - Ckt 1 CMR 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). Oil System Fault - Ckt 2 CMR Same as for Ckt 1, above.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Phase Unbalance - Cprsr D CMR Same as Diagnostic for Cprsr A. Power Loss - Cprsr A CAR a. b. c. 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. There was an incomplete Transition on the first check after transition and all three phases of current were not present.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Tracer Communications Loss IFW a. b. 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; use the Front Panel Setpoints and the Default Chiller Auto/Stop.
Diagnostics Table 19 Diagnostic Codes Diagnostic Description Type Cause Winding Temp - Cprsr B CMR Same as Diagnostic for Cprsr A, above. Winding Temp - Cprsr C CMR Same as Diagnostic for Cprsr A, above. Winding Temp - Cprsr D CMR Same as Diagnostic for Cprsr A, above. Zone Temp Sensor (Zone Reset Selected) IFW Open or Short. a. Use end of range value (whatever value the open or short gives). b. Clear diag. when the resistance returns to normal range. c.
Pump Package The Canariis Pumping System is completely assembled and consists of two centrifugal pumps, butterfly isolation valves, check valves, y-stainer, multipurpose valve, controls and piping designed to maintain a suitable water pressure over a widely varying flow range. Maintenance, once the system is properly installed is minimal. Temporary Storage If the unit will not be placed into immediate service, store in a clean dry area.
Pump Package Control Panel Features and Options 1. NEMA 3R Control Panel Enclosure 2. Individual Fused Disconnect Switches 3. Each A/C motor starter is a full voltage, non-reversing magnetic starter and is provided with adjustable 3-leg overload protection with manual overload reset push button. Motor starters are mechanically and electrically interlocked to ensure single pump operation. 4.
Pump Package WARNING Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. 1. Place panel disconnects(s), H/O/A switches, and control power On/Off switch (if provided) to the "Off" position. 2.
Pump Package Caution Pump Damage! Do not run the pumps without water in the system. Damage to the pump seal will result if the pump is run dry for more for more than a few seconds. 3. Confirm all H/O/A Switches are in the "Off" position. Turn control power (On / Off) switch to "On". 4. Turn disconnects only, to "ON" position (panel door must be closed). 5. Jog each pump by turning the respective H/O/A switch momentarily to the "HAND" position. System Start-up 1.
Pump Package 2AC C - 2X3X7 NPSH IN METERS NPSH IN FEET TOTAL HEAD IN FEET TOTAL HEAD IN METERS 1750 R.P.M. Impellers are trimmed in 1/8" increments to supply required capacity. Responsibility for final impeller sizing remains with ITT Bell & Gossett. 1750 R.P.M. CAPACITY IN U.S. GALLONS PER MINUTE CAPACITY IN CUBIC METERS/HR Figure 42 C - Pump Curves Before Impeller Trim 2BC D - 2X3X9 NPSH IN METERS NPSH IN FEET TOTAL HEAD IN FEET TOTAL HEAD IN METERS 1750 R.P.M.
Pump Package 21/2 AB E - 2.5X3X7 NPSH IN FEET NPSH IN METERS NPSH IN FEET NPSH IN METERS TOTAL HEAD IN FEET TOTAL HEAD IN METERS 1750 R.P.M. Impellers are trimmed in 1/8" increments to supply required capacity. Responsibility for final impeller sizing remains with ITT Bell & Gossett. 1750 R.P.M. CAPACITY IN U.S. GALLONS PER MINUTE CAPACITY IN CUBIC METERS/HR Figure 44 E - Pump Curves Before Impeller Trim 21/2BB F - 2.5X3X9 TOTAL HEAD IN FEET TOTAL HEAD IN METERS 1750 R.P.M.
TOTAL HEAD IN FEET TOTAL HEAD IN METERS NPSH IN METERS 3AC G - 3X4X7 1750 R.P.M. NPSH IN FEET Pump Package Impellers are trimmed in 1/8" increments to supply required capacity. Responsibility for final impeller sizing remains with ITT Bell & Gossett. 1750 R.P.M. CAPACITY IN U.S. GALLONS PER MINUTE CAPACITY IN CUBIC METERS/HR Figure 46 G - Pump Curves Before Impeller Trim Planned Shutdown 1.
Pump Package Troubleshooting Table 21 Pump Package Troubleshooting Problem Possible Cause Pumps will not run in hand or auto Power to panel is disconnected Panel disconnect is in off position Overload relay tripped Control circuit fuses blown Loose connection on power circuit Motor fuses blown Motor runs hot High flow resulting in high amp draw Incorrect supply voltage Noisy Pump/Motor Motor bearings worn Pump impeller clogged Inadequate suction pressure Piping stress Suction valve closed Entrapped a
Pump Package Figure 47 Pump Package Piping Schematic RTAA-SVX01A-EN 143
Pump Package 144 RTAA-SVX01A-EN
Unit Wiring Typical field connection diagrams, electrical schematics and connection diagrams for 70 -125 Ton RTAA units of “AO” design sequence are shown on the following pages. NOTE: The typical wiring diagrams in this manual are representative of “AO” design sequence units and are provided only for general reference. These diagrams may not reflect the actual wiring of your unit.
3327 146 RTAA-SVX01A-EN
RTAA-SVX01A-EN 147
3328 148 RTAA-SVX01A-EN
RTAA-SVX01A-EN 149
6516 150 RTAA-SVX01A-EN
RTAA-SVX01A-EN 151
3329 152 RTAA-SVX01A-EN
RTAA-SVX01A-EN 153
6472 154 RTAA-SVX01A-EN
RTAA-SVX01A-EN 155
3330 RTAA-SVX01A-EN 156
RTAA-SVX01A-EN
6046 158 RTAA-SVX01A-EN
RTAA-SVX01A-EN 159
3331 160 RTAA-SVX01A-EN
RTAA-SVX01A-EN 161
6519 162 RTAA-SVX01A-EN
RTAA-SVX01A-EN 163
6047 164 RTAA-SVX01A-EN
RTAA-SVX01A-EN 165
3325 166 RTAA-SVX01A-EN
RTAA-SVX01A-EN 167
6048 168 RTAA-SVX01A-EN
RTAA-SVX01A-EN 169
RTAA 125 RTAA 110 RTAA 100 RTAA 90 RTAA 80 Unit Size RTAA 70 Rated Voltage 200/60 230/60 380/60 460/60 575/60 400/50 200/60 230/60 380/60 460/60 575/60 400/50 200/60 230/60 380/60 460/60 575/60 400/50 200/60 230/60 380/60 460/60 575/60 400/50 200/60 230/60 380/60 460/60 575/60 400/50 200/60 230/60 380/60 460/60 575/60 400/50 760 Amp 310 Amp 310 Amp 175 Amp 175 Amp 175 Amp 760 Amp 760 Amp 310 Amp 175 Amp 175 Amp 175 Amp 760 Amp 760 Amp 310 Amp* 310 Amp 175 Amp 310 Amp 760 Amp 760 Amp 310 Amp* 310
RTAA-SVX01A-EN 171 Unit Voltage All 200/230 All All 200/230 380/400 460/575 All All All Unit Size All All All All All All All All Maximum Length for Sensor Leads 5000 FT 2000 FT 1000 FT (1) Do Not Run in Conduct With Higher Voltage Circuits.
3326 172 RTAA-SVX01A-EN
RTAA-SVX01A-EN 173
6049 174 RTAA-SVX01A-EN
RTAA-SVX01A-EN 175
6463 176 RTAA-SVX01A-EN
Trane A business of American Standard Companies www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com Literature Order Number RTAA-SVX01A-EN File Number SV-RF-RTAA-SVX01A-EN-0905 Supersedes RTAA-IOM-4A Stocking Location Inland Trane has a policy of continuous product data and product improvement and reserves the right to change design and specifications without notice.
