Service manual

ManualsBrandsCarrier ManualsRefrigeratorContainer Refrigeration Unit

Models

69NT40 -511-200

69NT40 -511-299

T-294 Rev A

Container

Refrigeratio n

Unit

Summary of content (125 pages)

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Container Refrigeration Unit Models 69NT40-511-200 to 69NT40-511-299 T-294 Rev A
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OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT MODELS 69NT40-511-200 to 69NT40-511-299 Carrier Transicold Division, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221 E Carrier Corporation 2000 S Printed in U. S. A.
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SAFETY SUMMARY GENERAL SAFETY NOTICES The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual. They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein. The general safety notices are presented in the following three sections labeled: First Aid, Operating Precautions and Maintenance Precautions.
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SPECIFIC WARNING AND CAUTION STATEMENTS To help identify the label hazards on the Unit and explain the level of awareness each one carries, an explanation is given with the appropriate consequences: DANGER -- means an immediate hazard which WILL result in severe personal injury or death. WARNING -- means to warn against hazards or unsafe conditions which COULD result in severe personal injury or death.
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TABLE OF CONTENTS Section Page SAFETY SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1 GENERAL SAFETY NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1 FIRST AID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1 OPERATING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (CONTINUED) Section 3.2 Page PRE-TRIP DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17 3.2.1 Pre-Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18 3.2.2 Pre-Trip Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19 INTEGRATED DataCorder (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (CONTINUED) Section Page TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 UNIT WILL NOT START OR STARTS THEN STOPS . . . . . . . . . . . . . . . . . . . . 5-1 5-1 5.2 UNIT RUNS BUT HAS INSUFFICIENT COOLING . . . . . . . . . . . . . . . . . . . . . . 5-1 5.3 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING . . . . . . . . . . . . 5-1 5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING . . . . . . . . . . . .
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TABLE OF CONTENTS (CONTINUED) Section Page 6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 6-16 6.17 EVAPORATOR FAN MOTOR CAPACITORS . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17 6.18 CONDENSER COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18 6.19 CONDENSER FAN AND MOTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . 6-18 6.20 MAINTENANCE OF PAINTED SURFACES . . . . . . . .
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LIST OF ILLUSTRATIONS (CONTINUED) Figure Page Figure 3-1 Micro-Link 2i Controller/DataCORDER Module . . . . . . . . . . . . . . . . . . . . . 3-1 Figure 3-2 Key Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Figure 3-3 Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Figure 3-4 Standard Configuration Report Sample . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LIST OF ILLUSTRATIONS (CONTINUED) Figure Page Figure 6-26 Stepper Motor Suction Modulation Valve (SMV) . . . . . . . . . . . . . . . . . . . . 6-22 Figure 6-27 Jumper Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24 Figure 6-28 Hermetic Thermostatic Expansion Valve Bulb . . . . . . . . . . . . . . . . . . . . . . 6-25 Figure 6-29 Hermetic Thermostatic Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 INTRODUCTION 1.1 BRIEF UNIT DESCRIPTION Operating control power is provided by a control transformer which steps down the AC supply power source to 18 and 24 volts AC, single phase control power. WARNING It has been determined that pressurized, air-rich mixtures of refrigerants and air can undergo combustion when exposed to an ignition source. This manual contains Operating Data, Electrical Data and Service Instructions for the refrigeration unit listed in Table 1-1.
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Transsformer Waterr-Cooled Condeenser 3 Row 4 Row Suction & D Discharge Option Pressure O Dehumid idification Trans nsFresh Communi nications Interfacee Module Temperature re Recorder Power Factor Fa Corrector or (PFC) Arctic O Option Hermet etic Unit Compositee Control Box NT0448 P X X -- X -- P -- X -- X -- X -- 77-01698-38 NT0569 P X X X -- -- P -- X -- X -- X X 77-01698-60 69NT40-511-201 NT0602 P X X X -- -- P X X -- X -- X X 77-01698-60 MODEL
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SECTION 2 DESCRIPTION 2.1 GENERAL DESCRIPTION the following sections in 2.1. The upper access panels allow front entry into the evaporator section, and the center access panel allows access to the evaporator coil heaters. The unit model number, serial number and parts identification number will be found on the front of the unit to the left of the compressor. a. Refrigeration Unit -- Front Section The front section of the refrigeration unit shows access to most parts of the unit (i.e.
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b. Evaporator Section When transporting perishable (chilled) commodities, the fan motors will normally be in high speed above --10_C (+14_F), or --5_C (+23_F) optionally.
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4 (RRS) 3 (RTS) 2 7 5 6 8 1 9 10 18 11 17 16 12 15 14 13 1. 2. 3. 4. 5. 6. 7. 8. 9. Evaporator Fan Motor #1 (EM1) Humidity Sensor (HS) -- Optional Return Temperature Sensor (RTS) Return Recorder Sensor (RRS) -- Optional Evaporator Fan Motor #2 (EM2) Power Factor Corrector (PFC) Defrost Termination Sensor (DTS) Heat Termination Thermostat (HTT) Evaporator Coil 10. 11. 12. 13. 14. 15. 16. 17. 18.
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c. Compressor Section modulation valve (SMV), quench expansion valve, stepper motor drive (SD), and the discharge pressure regulator valve. The compressor section includes the compressor (with high pressure switch), power cable storage compartment, and autotransformer (TRANS), which is located to the left of the compressor. The supply temperature sensor (STS), and ambient sensor (AMBS) are located at the right side of the compressor, and the suction line process tube.
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d. Condenser Section condenser coil. When the unit is operating, air is pulled in the bottom of the coil and discharged horizontally out through the front of the condenser fan grille. The condensing section consists of a condenser fan motor (CM), a condenser fan and an air-cooled 7 8 6 5 3 1 4 2 2 1. 2. 3. 4. Grille and Venturi Assembly Retaining Screw Condenser Fan Key 5. 6. 7. 8. Condenser Fan Motor (CM) Condenser Coil Cover Condenser Coil Condenser Motor Mounting Bracket Figure 2-4.
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e. Water-Cooled Condenser Section condenser pressure transducer (CPT), filter-drier, water hook-up couplings, water pressure switch (WP), and the liquid line process tube The water-cooled condenser section consists of water-cooled condenser, sight glass, and rupture disc, 1 2 4 3 9 1. 2. 3. 4. 5. 8 Water-Cooled Condenser Rupture Disc Condenser Pressure Transducer (CPT) Filter-Drier Moisture Liquid Indicator/Sight Glass 6. 7. 8. 9.
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f. Control Box Section transformer (TR), fuses (F), key pad (KP), display module, current sensor module (CS), Controller/DataCORDER module, and an optional remote monitoring unit (CI). The control box (see Figure 2-6) includes the manual switches (ST and MDS), circuit breaker (CB-1), contactors (CF, CH, EF, ES and HR), hour meter (HM), 1 16 1. 2. 3. 4. 5. 6. 7. 8.
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2.2 REFRIGERATION SYSTEM DATA a Compressor/Motor Assembly a. (CP) Number of Cylinders Model CFM Weight (Dry) Approved Oil Oil Charge Oil Sight Glass b. Expansion Valve Superheat Verify at --18 _C (0_F) container box temperature c. Heater Termination Thermostat Opens (HTT) Closes Cutout d High Pressure Switch (HPS) d. Cut-In 6 06DR 41 118 kg (260 lb) Castrol Icematic -- SW20 3.6 liters (7.6 U.S.
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2.3 ELECTRICAL DATA a. Ci Circuit it Breaker B k (CB) CB-1 Trips at CB-2 (50 amp) Trips at CB-2 (70 amp) Trips at b. Compressor Motor (CP) Full Load Amps (FLA) Full Load Amps Horsepower c. Condenser Fan Rotations Per Minute Motor (CM) Voltage and Frequency Bearing Lubrication Rotation Number of Heaters d. Drain Pan Heaters Rating ((DPH)) Resistance (cold) Type Number of Heaters Rating e.
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i. Humidity Sensor ((HS)) -- Optional p Orange wire Power Red wire Output Brown wire Ground Input voltage 5 vdc Output voltage 0 to 3.3 vdc Output voltage readings verses relative humidity (RH) percentage: 30% 0.99 V 50% 1.65 V 70% 2.31 V 90% 2.97 V 2.4 POWER AUTOTRANSFORMER (TRANS) 2. Plug the 230 vac (black) cable into a de-energized 190/230 vac, 3-phase power source. Energize the power source. Set circuit breaker (CB-2 if equipped) to position “1” (ON).
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2.5 REFRIGERATION CIRCUIT WITH THE WATER-COOLED CONDENSER will open to de-energize the condenser fan relay, unless overridden by the out-of-range lockout feature (if so equipped). The condenser fan motor will stop and will remain stopped until the water pressure switch closes, or it is overridden by the out-of-range lockout feature (if so equipped). Starting at the compressor, the suction gas is compressed to a higher temperature and pressure.
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5 6 7 4 8 9 10 2 3 1 11 14 13 15 1. 2. 3. 4. 5. 6. 7. 8. High Pressure Switch Discharge Pressure Regulator Valve Air-Cooled Condenser Evaporator Hermetic Thermostatic Expansion Valve External Equalizer Line Hermetic Thermostatic Expansion Valve Bulb Heat Exchanger 9. 10. 11. 12. 13. 14. 15. 12 Rupture Disc Moisture-Liquid Indicator Condenser Pressure Transducer (CPT) Filter-Drier Water-Cooled Condenser Stepper Motor Suction Modulation Valve (SMV) Quench Expansion Valve Figure 2-8.
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2.7 UPPER FRESH AIR MAKEUP VENT 2.8 LOWER FRESH AIR MAKEUP VENT (Optional) The purpose of the upper fresh air makeup vent is to provide ventilation for commodities that require fresh air circulation. The vent must be closed when transporting frozen foods. Air exchange depends on static pressure differential, which will vary depending on the container and how the container is loaded. The chart below gives air exchange values for an empty container.
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2.9 REMOTE MONITORING (RM) -- Optional 2.10 SAFETY AND PROTECTIVE DEVICES NOTE Unit components are protected from damage by safety and protective devices listed in Table 2-1. These devices monitor the unit operating conditions and open a set of electrical contacts when an unsafe condition occurs. The in-range light will be illuminated if the container control air temperature is within the tolerance selected. Refer to section 3.1.4 (Code 30).
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SECTION 3 MICROPROCESSOR 3.1 MICRO-LINK 2i CONTROLLER MODULE 1 2 3 3 4 5 1. Mounting Screw 2. Micro-Link 2i Controller/DataCORDER Module 3. Connectors 4. Test Points (TP) 3 6 7 3 8 3 5. Fuses (F) 6. Control Circuit Power Connection (Location: In back of connector) 7. Battery Pack (Optional) 8. Software Programming Port Figure 3-1. Micro-Link 2i Controller/DataCORDER Module 3.1.1 Brief Description For Controller alarm digital display identification refer to Table 3-4.
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3.1.2 Controller Programming (Memory) Cards Programming cards with either Operational Software or Configuration Software are available through CTD Replacement Components Group. The programming cards are used for loading software into the Controller. This is the same concept as using a floppy diskette to load software into a personal computer. The software that can be loaded into the Controller module comes in one of two forms: “Operational Software” or “Configuration Software.
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Table 3-1.
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3.1.3 General Layout of the Controller Section Table 3-2. Key Pad Function The Micro-Link 2i Controller/DataCORDER consists of a key pad, display module and Controller module. Connectors are used to attach the wiring of the unit to the Controller module. The Controller module is designed to permit ease of installation and removal. All control functions are accessed by key pad selections and viewed on the display module which are designed for optimum user friendliness and convenience.
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The display module (see Figure 3-3) is mounted at a 20 degree downward tilt to aid in visibility. The display module consists of: a. Two 25mm (1 inch) high, five digit LCD displays which are easily viewed in direct sunlight and backlighted for superior low-light visibility. b. Seven Indicators: S Cool -- White Lamp: Energized when the refrigerant compressor is energized. S Heat -- Orange LED: Energized when the heaters are on, and the unit is in the heat or defrost mode.
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3.1.4 Controller Function Codes (see Table 3-3). For the display only function codes, the right window will display the value of this item for five seconds before returning to the normal display mode. If a longer time is desired, pressing the ENTER key will extend the time to 30 seconds after the last pressing of the ENTER key. Function codes are explained in Table 3-3. There are thirty-nine functions which the operator may access to examine the operating status of the unit.
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Code No.
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Code No. TITLE DESCRIPTION Inapplicable Functions Display -- -- -- -- -Display/Select Functions NOTE Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of these functions to meet the operational needs of the container. Cd27 Defrost Interval (Hours) The defrost interval is the time interval between defrost cycles. Five selectable values are available: 3, 6, 9, 12 or 24 hours. The factory default value is 12 hours.
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Code No. Cd32 Cd33 Cd34 Cd35 Cd36 Cd37 TITLE DESCRIPTION Inapplicable Functions Display -- -- -- -- -The current limit is the maximum current demand allowed on any phase at any time. Limiting the unit’s current (amperage) reduces the load on the main power and lowers the compressor discharge pressure. When desirable, the limit can be Current Limit lowered. Note, however, that capacity is also reduced.
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Code No. TITLE Secondary Return Cd39 Air Temperature (Optional) 3.1.5 DESCRIPTION Inapplicable Functions Display -- -- -- -- -This code is only applicable to units without a DataCORDER, that are configured to have four probes. If this is true, it will then display the current secondary return air temperature.If the unit is configured with a DataCORDER, the Controller function code Cd39 will display “-- -- -- -- -- ,” and the display values for RRS will appear on the DataCORDER function code dC2.
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Table 3-4. Controller Alarm Indications Code No. TITLE DESCRIPTION AL20 Control Circuit Fuse Open (24 vac) AL21 Micro Circuit Fuse Open (18 vac) Alarm 20 is triggered by fuse (F3) opening and will cause the software shutdown of all control units. This alarm will remain active until the 10 amp fuse is replaced. Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC power supply to the Controller. The suction modulation valve (SMV) will be opened and current limiting is halted.
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Code No. TITLE Primary Supply Air AL54 Sensor Failure (STS) DESCRIPTION Alarm 54 is activated by an invalid primary supply sensor reading that is sensed outside the range of --50 to +70_C (--58_F to +158_F) or if the probe check logic has determined there is a fault with this sensor. If Alarm 54 is activated and the primary supply is the control sensor, the secondary supply sensor will be used for control if the unit is so equipped.
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Code No. TITLE DESCRIPTION Alarm 64 is triggered if the discharge temperature is sensed greater than 135_C (275_F) for three continuous minutes, if it exceeds 149_C (300_F), or if the sensor is out of range. This is a display alarm and has no associated failure action. Discharge Pressure Alarm 65 is triggered by a compressor discharge transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig).
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3.1.6 Condenser Pressure Control (CPC) The Controller configuration variable for “Heat Lockout” (refer to Table 3-1) can be changed for set points of either --10_C (+14_F), or --5_C (+23_F) optionally. A pressure control system has been incorporated by means of a condenser pressure transducer (CPT) and condenser pressure control (CPC) logic to maintain discharge pressures above 130 psig in low temperatures.
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The supply probe is used for control and is so indicated by the “SUPPLY” LED on the display module. The Perishable temperature range demands high accuracy. The unit is capable of maintaining supply air temperature to within ¦0.25_C (¦0.5_F) of the set point temperature setting. In Perishable range above --10_C (+14_F), or --5_C (+23_F) optionally, control is maintained by controlling the position of the stepper motor suction modulation valve (SMV) with the compressor energized. 2.
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to prevent rapid cycling of the heater contactor when the humidity set point is satisfied. If the mode is terminated by a condition other than the humidity sensor, e.g., an out-of-range or compressor shutdown condition, the heat relay is de-energized immediately. or equal to the supply air temperature + 3_C (5.4_F). When the fans switch to low speed, they will run in low speed for one hour. At the end of the hour, the evaporator fans will switch back to high speed.
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second way to deactivate economy mode is to change the set point. Once economy mode is deactivated, the system will return to normal control mode operations. 3.1.7.
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a. Starting and Terminating Pre-Trip If the pre-trip was last executed manually after power up, the last menu selection will appear on the left display. If pre-trip was not executed since power up, then the right display will show “Auto” or “Auto 1.” The user may scroll through the test selection menu using the arrow keys. NOTE Prior to starting tests, verify that Controller function codes Cd04, Cd05, Cd06 and Cd07 are operational. Otherwise, tests may fail incorrectly.
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INDEFINITELY, until the user manually enters a command. Holding the PRE-TRIP key will terminate the pre-trip mode operation. c. Auto Test Communications From Serial Pre-trip may also be initiated via communications. The operation is the same as for the Auto Test mode described above except that should a test fail, the pre-trip mode will automatically terminate.
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Code No. TITLE P3-0 Low Speed Evaporator Fan Motors On P3-1 Low Speed Evaporator Fan Motors Off P4-0 High Speed Evaporator Fan Motors On P4-1 High Speed Evaporator Fan Motors Off P5-0 Supply/Return Probe Test DESCRIPTION Setup: The high speed evaporator fans will be turned on for 10 seconds, then off for two seconds, then the low speed evaporator fans are turned on. A current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified.
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Code TITLE No. P6-H Not Applicable P6-L Not Applicable P6-2 Suction Modulation Valve (Open and Closed) P6-3 P6-4 P6-5 Quench Valve Test Not Applicable Not Applicable DESCRIPTION This test is not in use starting with model number 69NT40-511-200 and UP. This test is not in use starting with model number 69NT40-511-200 and UP. Setup: The compressor and fans continue to run from the previous test. The quench valve (if configured) will operate as in normal control mode.
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Code No. P8-0 TITLE Perishable Mode Heat Test P8-1 Perishable Mode Pull Down Test P8-2 Perishable Mode Maintain Temperature Test P9-0 Defrost Test P10-0 Frozen Mode (Setup) Test T-294-01 DESCRIPTION Setup: If the container temperature is below 60_F, the set point is changed to 60_F, and a 60 minute timer is started. The left display will read “P8-0.” The control will then heat the container until 60_F is reached.
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Code No. P10-1 TITLE Frozen Mode (Pull Down) Test Frozen Mode P10-2 Maintain Temperature Test DESCRIPTION Setup: When the container temperature is greater than or equal to the 45_F. set point which was set in the frozen mode heat test, the left display will read “P101” and the right display will show the return air temperature. The set point will then be changed to --17.7_C (0_F). The unit will then have a maximum of three hours to pull the container temperature down to the 0_F set point.
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S Real Time Clock (RTC) Modification Configuration: S Pre-Trip result & data S Trip Start S ISO Trip Header (Must be entered first via Interrogation program) Tells the operational software what physical components are built into the container unit, how many sensors to record, what recording interval should be used, etc..
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Table 3-6. DataCORDER Function Code Assignments NOTE Inapplicable Functions Display “--- --- --- --- ---” To Access: Press ALT. MODE key Code No. dC1 dC2 dC3-5 dC6-13 TITLE Recorder Supply Temperature Recorder Return Temperature USDA 1,2,3 Temperatures Network Sensors 1-8 Cargo Probe 4 Temperature dC15-19 Future Expansion Temperature dC20-24 Sensors 1-5 Calibration dC25 Future Expansion dC14 DESCRIPTION Current recorder supply air temperature. Current recorder return air temperature.
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3.3.4 DataCORDER Alarms S To Display Alarm Codes: While in Set Point Selection or Default Display mode, press the ALT. MODE & ALARM LIST keys. This accesses the Alarm List Display Mode, which displays any alarms stored in the Alarm Queue. The user may scroll to the end of the alarm list by pressing the UP ARROW key after the ALARM LIST key is depressed. Depressing the DOWN ARROW key allows the user to scroll backward in the alarm list.
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Table 3-7. DataCORDER Alarm Indications To Access: Press ALT. MODE key Code TITLE No.
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The DataCORDER alarms for the USDA and cargo probes are configurable using the interrogation program or via a configuration card. There are four configuration variables for the DataCORDER, which are listed in Table 3-8 with their descriptions and selection values. b. DataCORDER Power-Up The DataCORDER may be powered up in several ways: 1. Normal AC power: The DataCORDER is powered up when the unit is turned on via the stop-start switch (ST). Table 3-8.
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Trip Start may also be initiated via communications using the interrogation program. S Discharge pressure transducer (DPT) S Suction pressure transducer (SPT) e. Display vs. Configuration Codes S Condenser pressure transducer (CPT) The DataCORDER contains two types of display codes; Display and Configuration. Display codes will display parameter values, but will not let them be modified.
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Left Display: Right Display: Or: #3 probes (and possibly the optional Cargo probe) are installed in their receptacles. “dALnn” where nn = the alarm history entry 01-08 “xA nn” where x = “I” (inactive) or “A” (active) “-- -- -- -- -- ” if no alarms are currently in the alarm history list The DataCORDER records up to six probe temperatures (supply, return, USDA #1, #2, #3 and an optional cargo probe #4), at the logging interval.
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Start, Power Outages, and Temperature Out-of-Range conditions. b. Pre-cool to treatment temperature. c. Install the DataCORDER module battery pack (if not already installed). 3.3.10 DataCORDER Scrollback d. Calibrate the three USDA probes by ice bathing the probes and performing the calibration function with the hand held DataReader or a DOS-based portable computer. This calibration procedure determines the probe offsets and stores them in the Controller for use in generating the cold treatment report.
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Table 3-10. DataCORDER Pre-Trip Data Test No. TITLE DATA NOTE “Auto” or “Auto1” menu includes the following: P, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2’ (Optional) menu includes the following: P, P1, P2, P3, P4, P5, P6,P7, P8, P9, P10 and rSLts. (Refer to section 3.2.1.
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CONTAINER ABCDXXXXXXX ON 08Jul 94 FROM 15Apr94 TO 17Apr94 (DEGREES C) PAGE: 1 HEADER INFORMATION DataCorder SN: XXXXXXXX ALARMS REPORT ALARM NUM FIRST ACTIVE LAST ACTIVE CONTROLLER ALARMS: 60 17Apr94 03:28 DATACORDER ALARMS 17Apr94 16:13 No Alarms Reported DATE: 15Apr94 23:49 Trip Start USDA SUMMARY LEGEND SP PS, PE NEW SN dal NEW SW Setpoint Change Pretrip Start/End Controller Rep.
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FALLING TEMPERATURE RISING TEMPERATURE +1.5_C (2.7_F) COOLING +1_C (1.8_F) COOLING +0.5_C (0.9_F) +0.20_C SET POINT - 0.20_C - 0.5_C (0.9_F) AIR CIRCULATION ONLY - 1_C (1.8_F) AIR CIRCULATION ONLY - 1.5°C (2.7°F) NOTE For In-range Tolerance, Refer to section 3.1.4 Code 30.. Figure 3-5. Controller Set Point BELOW --10_C (+14_F), or --5_C (+23_F) optionally FALLING TEMPERATURE RISING TEMPERATURE +1.5_C (2.7_F) MODULATING COOLING AIR CIRCULATION and possible modulated cooling +1_C (1.8_F) +0.
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SECTION 4 OPERATION 4.1 PRE-TRIP INSPECTION (Before Starting) 4.2 STARTING AND STOPPING INSTRUCTIONS WARNING CAUTION Beware of unannounced starting of the evaporator and condenser fans. Make sure that the unit circuit breaker(s) (CB-1 & CB-2) and the start-stop switch (ST) are in the OFF position before connecting to any electrical power source. a. If container is empty, check inside for the following: a. Starting the Unit 1. Check channels or “T” bars on floor for cleanliness.
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4.4 UNIT OPERATION 4.4.1 S Crankcase Heater (CCH)-- Optional When the crankcase heater is installed, it will be operational whenever the compressor is off and there is power to the unit. The heater is connected to a set of normally closed auxiliary contacts on the compressor contactor (CH). 4.4.2 If AL55 is active, meaning that the DataCORDER (DC) functionality is no longer active (DC configuration variable off), the Controller will act as a four probe configured system during probe checks.
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4.4.3 with the condenser fan motor, compressor motor and evaporator fan motors energized. Also, at this time, the cool light is illuminated. Cooling -- Controller Set BELOW --10_C (+14_F), or --5_C (+23_F) optionally NOTES S The stepper motor suction modulation valve (SMV) may be up to 100% open depending on the current and pressure limiting controls. S The evaporator motors run in low speed. S The compressor runs in high speed.
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CONTROL TRANSFORMER = 18 Volt Energized Circuit = 24 Volt Energized Circuit = De-energized Circuit Figure 4-1.
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4.4.5 Heating Mode As the supply air decreases to the in-range tolerance below set point, relay TI and the in-range light de-energize (after a 15 minute time delay) and will remain de-energized until the supply air increases to a tolerance below set point. (Refer to section 3.1.4, Code 30.
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CONTROL TRANSFORMER = 18 Volt Energized Circuit = 24 Volt Energized Circuit = De-energized Circuit Figure 4-2.
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4.4.6 Defrost Mode function. Under certain circumstances, defrost may also be forced to terminate through special communication commands. Refer to section 3.1.4 (Code 27) for description of the defrost interval selector and automatic defrost initiation. Upon completion of the de-ice phase of defrost, the controller will perform a probe check cycle.
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which should be active at this point. In arctic mode, the CCH is energized for 30 minutes to warm the oil in the compressor, and boil off any liquid refrigerant that may be present in the crankcase. is over, the controller will revert to its normal control mode logic. If Pre-Trip is initiated during the 30 minute time period, Pre-Trip will be allowed to run normally. Once Pre-Trip Arctic mode is configurable by using the configuration variable #29, refer to Table 3-1. If ambient is warmer than --10.
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Table 4-1. Electrical Control Positions -- BELOW --10_C (+14_F), or --5_C (+23_F) optionally CONTROL CIRCUIT Compressor Contactor (CH) COOLING Holding Zone Energized De-energized **Dehumidification HEATING DEFROST ** ** De-energized 1 Condenser Fan Contactor (CF) High Speed Evaporator Contactor (EF) Low Speed Evaporator Contactor (ES) Energized De-energized ** ** De-energized De-energized De-energized Refer to section 3.1.7.a.2 Refer to section 3.1.7.a.
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Table 4-2. Electrical Control Positions -- ABOVE --10_C (+14_F), or --5_C (+23_F) optionally CONTROL CIRCUIT COOLING Holding Zone Compressor Contactor (CH) Energized De-energized Condenser Fan Contactor (CF) Energized High Speed Evaporator Contactor (EF) * Dehumidification HEATING DEFROST ** ** De-energized 1 De-energized Energized De-energized De-energized Energized Energized Refer to section 3.1.7.a.2 Refer to section 3.1.7.a.
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SECTION 5 TROUBLESHOOTING CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.
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SECTION 6 SERVICE NOTE To avoid damage to the earth’s ozone layer, use a refrigerant recovery system whenever removing refrigerant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608. 6.1 REPAIRING THE REFRIGERATION SYSTEM 5. Tighten the valve to the process tube by turning the nut enough to seal the gasket and to secure the valve to the process tube.
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6.3 MANIFOLD GAUGE SET Low Pressure Gauge The manifold gauge set can be used to determine system operating pressure, add a refrigerant charge, and to equalize or evacuate the system. Figure 6-2 shows hand valves, gauges and service ports “A, C and B.” When the low pressure hand valve is frontseated (turned all the way in), the low (suction) pressure can be checked. When the high pressure hand valve is frontseated, high (condensing) pressure can be checked.
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1 2 To Low Side 2 Blue Hose 4 3 To High Side 2 Red Hose 3 3 4 Red Knob 6 Blue Knob Yellow Hose 2 1. Manifold Gauge Set 2. Hose Fitting (0.500-16 Acme) 3. Refrigeration or Evacuation Hoses (SAE J2196/R-134a) 5 4 Hose Fitting w/O-ring (M14 x 1.5) 5. High Side Field Service Coupling 6. Low Side Field Service Coupling Figure 6-3.
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6.4 REFRIGERANT RECOVERY S 1. Disconnect the tube clamp connected to the baffle plate on the liquid line process tube. Remove the baffle plates covering both process tubes. Place the 3/8 inch flare nuts on both process tubes and flare the tube. S Connect the 3/8 inch to 1/4 inch flare adapter and the 1/4 inch swivel elbow x R-134a refrigerant adapter to the R-134a gauge set. 2. Install the piercing valve (refer to section 6.
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1 2 1. Liquid Line Process Tube 2. Suction Line Process Tube Figure 6-4.
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6.5 REFRIGERANT LEAK CHECKING d. If possible, keep the ambient temperature above 15.6_C (60_F) to speed evaporation of moisture. If the ambient temperature is lower than 15.6_C (60_F), ice might form before moisture removal is complete. Heat lamps or alternate sources of heat may be used to raise the system temperature. e. To help speed up the evacuation procedure, replace the filter-drier with a section of 3/8 inch ID copper tubing. WARNING Never mix refrigerants with air for leak testing.
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NOTE refrigerant container on weight scales. The correct amount of refrigerant may be added by observing the scales. (Refer to section 6.7) It may be necessary to finish charging the unit through the suction line process tube in gas form, due to pressure rise in high side of the system. (Refer to section 6.7.3) 6.7 REFRIGERANT CHARGE 6.7.1 d. Backseat the manifold gauge port. Close liquid valve on cylinder. Checking the Refrigerant Charge e. Start unit in cooling mode.
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f. If the discharge pressure is more than ten psig below the curve, add three pounds of R-134a refrigerant through the suction line process tube. h. The unit should be operating normally. Return to water-cooled operation, if necessary. g. Return set point to previous temperature setting. i. Leave piercing valves in place for Port repair. j. Tag the unit for Port/Maintenance repair. 9 7 8 10 11 4 1 4 3 6 2 1. 2. 3. 4. 5. 6.
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6.8 COMPRESSOR -- MODEL 06DR 1 WARNING 2 3 15 Make sure power to the unit is OFF and power plug disconnected before replacing the compressor. 14 13 4 NOTES S The compressor should not operate in a vacuum greater than 500 mm Hg (20 inches Hg). 12 S The service replacement compressor is sold without terminal box and cover. Customer should retain the original terminal box, cover, and high pressure switch for use on replacement compressor. 5 6 11 10 9 8 7 1. Discharge Flange 2.
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r. Remove vacuum pump lines. 1 2 3 4 5 7 s. Start unit and check refrigerant charge. (Refer to section 6.7.1.) t. Check moisture-liquid indicator for wetness. Change filter-drier if necessary. (Refer to section 6.12) Jack here u. Check compressor oil level per section 6.11. Add oil if necessary. 6 1. 2. 3. 4. 5. 6. 7. 6.
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CAUTION g. Be very careful not to damage the motor windings when removing the motor end cover, as the cover fits over the winding coils. Remove all capscrews except one in the top of the cover. Then, while holding the cover in place, remove the remaining capscrew. Do not allow the cover to drop from its own weight. To prevent striking the winding, remove the cover horizontally and in line with the motor axis.
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7 6 4 5 3 1 2 2 1 3 1. Equalizer Tube and Lockscrew Assembly 2. Lockwasher 3. Counterweight -- Motor End 1. 2. 3. 4. 5. 6. 7. Figure 6-13. Removing Equalizing Tube and Lock Screw Assembly Strainer Screws and Washers Suction Strainer Motor End Cover Gasket Motor End Cover Valve Gasket Suction Flange Valve Capscrew Disassemble and assemble the terminal plate as shown in Figure 6-14.
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6.10 COMPRESSOR REASSEMBLY To clean compressor parts, use a suitable solvent with proper precautions. Coat all moving parts with the proper compressor oil before assembly. Refer to Table 6-8 for applicable compressor torque values. Compression ring Figure 6-16. Piston Rings 1 c. Installing the Components 1. Push pistons from the inside of the crankcase through the cylinders, being careful not to break the rings. Place chamfered side of connecting rod against radius of crankpins.
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CAUTION 7. Install the oil suction screen, the oil suction screen hold down plate and the bottom plate. Extreme care must be taken to ensure the manifold common connection remains immersed in oil at all times. Otherwise air and moisture will be drawn into the compressor. Connect the suction connection of the gauge manifold to the compressor liquid line process tube (refer to sections 6.3 and 6.4), and immerse the common connection of the gauge manifold in an open container of refrigeration oil.
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d. Removing Oil from the Compressor 1. Recover refrigerant (refer to section 6.4) and replace filter-drier. Do not allow contaminants and moisture into the system. 1. If the oil level recorded in step a.3 is above one-eighth level of the capacity of the sight glass, oil must be removed from the compressor. 2. Evacuate the unit per section 6.6. 3. After unit is in operation, inspect for moisture in system. 2. Close (frontseat) the manifold liquid hand valve and pump unit down to 1.2 to 1.
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NOTE e. Close valve on cylinder and open bleed-off valve. f. Place a clean rag moistened with clean water on the Moisture line indicator. This will help prevent any heat damage to the indicator. 9. Install strap on filter drier. 10. Use an abrasive cloth to clean all brazed joints. Open cylinder valve. Slowly close bleed-off valve to increase pressure on switch. The switch should open at a static pressure up to 25 kg/cm@ (350 psig). If a light is used, light will go out.
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6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY 6. Remove the mounting hardware from the coil. The evaporator fans circulate air throughout the container by pulling air in through the top of the unit. The air is forced through the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigeration unit into the container. (Refer to section 2.3.) The fan motor bearings are factory lubricated and do not require additional grease. 7.
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6 3 2 6. Replace access panel making sure that panel does not leak. Make sure that the T.I.R. locking device is lockwired. 5 4 6.17 EVAPORATOR FAN MOTOR CAPACITORS The evaporator fan motors are of the permanent-split capacitor type. The motor is equipped with one capacitor (used in the high speed circuit) and another capacitor used for the low speed circuit. 5 1 a. When to check for a defective capacitor 7 1. Fan motor will not change speed.
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6.19 CONDENSER FAN AND MOTOR ASSEMBLY 1. Volt-ohmmeter set on RX 10,000 ohms. Connect ohmmeter leads across the capacitor terminals and observe the meter needle. If the capacitor is good, the needle will make a rapid swing toward zero resistance and then gradually swing back toward a very high resistance reading. If the capacitor has failed open, the ohmmeter needle will not move when the meter probes touch the terminals.
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6.20 MAINTENANCE OF PAINTED SURFACES b. Refer to Figure 2-7 for the location of TBU. The refrigeration unit is protected by a special paint system against the corrosive atmosphere in which it normally operates. However, should the paint system be damaged, the base metal can corrode.
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d. Cut one wire of existing cable 41 mm (1-5/8 inches) shorter than the other wire. RRS or SRS: Using the plug connector marked “EC” that is connected to the Controller module. Locate the wires marked RRS or SRS, depending on which sensor needs to be replaced. Follow that wire to the connector and using the pins of the plug, measure the ohms resistance. Readings are shown in Table 6-5. e. Cut one replacement sensor wire (opposite color) back 41 mm (1-5/8 inches). (See Figure 6-22.
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CAUTION CAUTION Do not allow moisture to enter wire splice area as this may affect the sensor resistance. Do not allow moisture to enter wire splice area as this may affect the sensor resistance. l. n. Position sensor in unit per Figure 6-21 and check sensor resistance as detailed in section 6.23.1. Check sensor resistance as detailed in section 6.23.1. m. Reinstall the return sensor as shown in Figure 6-24.
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NOTE d. Cut one replacement sensor wire back 25.4 mm (1.0 inch). (See Figure 6-25.) The DTS sensor must have “Presstite” insulating material placed completely over the sensor to insure proper function of the sensor. e. Strip back insulation on all wiring 6.35mm (1/4 inch). Sensor Mounting Stud 6.24 STEPPER MOTOR SUCTION MODULATION VALVE (SMV) 25.4 mm (1.0 inch) On start up of the unit, the valve will reset to a known open position.
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be in effect. This places the valve at a 21% staging position and is sufficient to drive the temperature of the supply probe down several degrees during this interval. 5. If the unit still does not operate properly, stop unit, and check out the SMV system, refer to section 6.24.b. After the CREL time-out has been met, the valve will start responding to the control logic and open or close, relative to the demand. Scrutinize the unit operation for a few minutes.
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d. Checking the Drive Module and if it is desired, the TTL signals on pins “C” and “D” can be checked as follows: 1. Turn unit OFF. S 3. Attach the positive lead of a AC volt meter, and set to read up to 24 volts to outlet pin “A” (1A) of the four pin connector and the negative lead to the “B” pin (1B). Make up a jumper assembly in which the drive module and controller connectors can be joined as in Figure 6-28 with the jumper completing the circuits from the controller to the drive module. S 4.
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b. Removing the Expansion Valve NOTES 3 S The hermetic TXV does NOT have adjustable superheat. 1 S Suction Line TXV Bulb Clamp Nut and Bolt TXV Bulb All connections on the hermetic TXV are bi-- metallic, copper on the inside and stainless on the outside. S All joints on the hermetic TXV (inlet, outlet and equalizer lines) are brazed. S Bi-- metallic connections heat up very quickly. 2 1. 2. 3. 4. 4 Figure 6-29. Hermetic Thermostatic Expansion Valve Bulb 6 a.
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c. Installing the Expansion Valve 4. Braze inlet connection to inlet line, see Figure 6-31. 1. Clean the suction line with sandpaper before installing bulb to ensure proper heat transfer. Apply thermal grease to the indentation in the suction line. 5. Braze outlet connection to outlet line. 2. Strap the thermal bulb to the suction line, making sure bulb is placed firmly into the suction line. See Figure 6-29 for bulb placement. 7. Braze the equalizer connection to the equalizer line. 6.
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6.26 POWER FACTOR CORRECTOR CAPACITORS (PFC) 1. Volt-ohmmeter set on RX 10,000 ohms. a. When to check for a defective capacitor Connect ohmmeter leads across the capacitor terminals and observe the meter needle. If the capacitor is good, the needle will make a rapid swing toward zero resistance and then gradually swing back toward a very high resistance reading. The reading should read about 330,000 ohms (for a good capacitor) due to the discharge resistors.
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1 3. Place strap on wrist and attach the ground or clip end of the wrist strap to any exposed unpainted metal area on the refrigeration unit frame (bolts, screws, etc.). 2 4 3 4. Carefully remove the Controller/DataCORDER. Do not touch any of the electrical components if possible. Place the module on the static mat. 5. If you are servicing the refrigeration unit, you are free to remove the ground strap from your wrist and complete your work. 6.
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5. Press the ENTER key on the keypad. 7. Turn unit OFF using start-stop switch (ST). 6. The Display will show the message “Pro SoFt.” This message will last for up to one minute. 8. Remove the programming programming/software port. 7. The Display module will read: A group of test points (tp) are provided on the Controller (see Figure 6-32, item 3) for trouble-shooting electrical circuits (refer to section 5). A description of the test points follows: 8. Turn unit OFF, via start-stop switch (ST).
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6.28 WATER-COOLED CONDENSER Summary of Procedure: a. Drain water from condenser tubing circuit. Clean water tubes with Oakite No. 22 to remove mud and slime. The water-cooled condenser is of the shell and coil type with water circulating through the cupro-nickel coil. The refrigerant vapor is admitted to the shell side and is condensed on the outer surface of the coil. b. Flush. c. De-scale water tubes with Oakite No. 32 to remove scale.
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Centrifugal pump 30 GPM at 35’ head Priming connection Pump NOTE Gas vent Globe valves Close vent pipe valve when pump is running. Suction Condenser Tank Remove water regulating valve Return Pump support If the condenser cooling water is not being used as drinking water or is not re-circulated in a closed or tower system, neutralizing is not necessary. 11. Put the unit back in service and operate under normal load. Check the head pressure. If normal, a thorough de-scaling has been achieved.
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h. The surface must be clean and dry. Roughen the surface with sandpaper to ensure a good bond. The damaged insert must be removed from the control box. Table 6-3 identifies the drill size and drill depth to be used for each insert. A stop ring should be used on the drill bit to limit the depth. i. Cut the fiberglass cloth to allow a 25mm (1--inch) overlap around the area to be repaired. a. Center the drill bit on the insert and drill to the prescribed depth. j.
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Table 6-1 Crack, Chip & Hole Repair Kit ITEM DESCRIPTION PART NUMBER Qty 1 Crack Repair Kit -- Includes 76--00724--00SV 1 2 . . . Fiberglass Patch Kit (Loctite FK--98 or 80265) 76--00724--00Z 10 3 . . . Sikaflex 221 Adhesive Sealant (Sikaflex 232--361) 02--00067--02Z 10 4 . . . Instruction Sheet 98--02339--00 10 Table 6-2 Insert Repair Kit ITEM DESCRIPTION PART NUMBER Qty 1 Insert Repair Kit -- Includes 76--50084--00 1 2 . . . Insert - 17.53 x 9.91 mm (..690 x .
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Figure 6-36.
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Table 6-4.
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Table 6-7. Wear Limits For Compressors PART NAME MAIN BEARING Main Bearing Diameter Main Bearing Journal Diameter PUMP END Main Bearing Diameter Main Bearing Journal Diameter CONNECTING ROD Piston Pin Bearing CRANKPIN DIAMETER Throw THRUST WASHER (Thickness) CYLINDERS Bore Piston (Diameter) Piston Pin (Diameter) Piston Ring Gap Piston Ring Side Clearance FACTORY MAXIMUM FACTORY MINIMUM INCHES MM INCHES 1.6268 41.3207 1.6233 1.3760 34.9504 1.3768 34.9707 1.072 0.154 27.2288 3.9116 2.0010 50.
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Table 6-8. Compressor Torque Values TORQUE RANGE SIZE DIAMETER (INCHES) 1/16 1/8 1/4 1/4 THREADS PER INCH 27 (pipe) 20 (pipe) 20 (pipe) 20 1/4 28 5/16 18 3/8 16 7/16 5/8 5/8 #10 1-1/2 14 11 18 32 18 NEF USAGE FT LB FT-LB MKG 8 -- 12 6 -- 10 20 -- 25 10 -- 12 12 -- 15 12 -- 16 6 -- 10 12 -- 16 1.11 -0.83 -2.77 -1.38 -1.66 -1.66 -0.83 -1.66 -- 16 -- 20 2.21 -- 2.77 20 -- 30 2 77 -- 4.15 2.77 4 15 40 -- 50 5.53 -- 6.92 55 25 60 4 35 7.61 -- 8.30 3.46 -- 4.15 8.30 -- 10.37 0.55 -- 0.83 4.
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Table 6-9. Temperature-Pressure Chart -- R-134a TEMPERATURE _F _C --40 --40 --35 --37 --30 --34 --25 --32 --20 --29 --18 --28 --16 --27 --14 --26 --12 --24 --10 --23 --8 --22 --6 --21 --4 --20 --2 --19 --0 --18 2 --17 4 --16 6 --14 8 --13 10 --12 12 --11 14 --10 16 --9 18 --8 20 --7 22 --6 24 --4 26 --3 28 --2 BOLD FIGURES = Inches Mercury Vacuum (cm Hg VAC) LIGHT FIGURES = psig (kg/cm@) PRESSURE TEMPERATURE 2 Psig Kg/cm Bar _F _C Psig 14.6 37.08 - .49 30 --1 26.1 12.3 31.25 - .42 32 0 27.8 9.7 24.64 - .
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NOTE Liquid Line Process Tube Pressure Curves to be used as troubleshooting guide only for model series 69NT40-511-200 to 69NT40-511-299 with fresh air makeup vent closed, unit powered on 460 VAC/60hz and SMV 100% open. (Bar) psig (22.0) 320 (20.7) 300 35_ _F (1.7_ _C) Box (19.3) 280 (17.9) 260 (16.6) 240 (15.2) 220 (13.8) 200 (12.4) 180 (11.0) 160 0_ _F (--17.8_ _C) Box (9.7) 140 (8.3) 120 (6.9) 100 (5.5) 80 60 (15.6) 70 (21.1) 80 (26.7) 90 (32.2) 100 (37.8) 110 (43.3) 120 _F (48.
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SECTION 7 ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS 7.1 INTRODUCTION This section contains Electrical Schematics and Wiring Diagrams covering the Models listed in NO TAG. The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual. They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein.
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Figure 7-1.
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Figure 7-1.
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Figure 7-2.
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Figure 7-2.
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INDEX A Compressor Contactor, 2-7, 4-2, 4-6, 4-10, 4-11 Compressor Crankcase Heater, 2-9, 4-2, 6-9 Access Panel, 2-1 Compressor Motor, 2-4, 5-1, 6-9, 6-29 Air Makeup Vent Lower Fresh, 2-1, 2-13 Upper Fresh, 2-1, 2-13 Compressor Sight Glass, 2-4 Condenser Air--Cooled, 2-12 Coil, 5-3, 6-18 Specifications, 2-9 Water--Cooled, 2-6, 2-12 Air--Cooled Condenser, 2-12 Alarms Controller, 3-11 DataCORDER, 3-27 DataCORDER Configurations, 3-28 Condenser Fan Contactor, 2-7, 4-6, 4-8, 4-10, 4-11 Ambient Sensor, 2-
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INDEX D Data Electrical, 2-9 Refrigeration System, 2-8 DataCORDER, 3-23 Access to Functions, 3-28 Alarms, 3-26 Communications, 3-30 Configuration, 3-24 Function Codes, 3-24 Pre--Trip Data Recording, 3-30 Scrollback, 3-31 Serial Number, 3-25 USDA Cold Treatment, 3-31 USDA Recording, 3-30 USDA/Message, 3-30 Exchanger, Heat, 2-3, 2-12 Expansion Valve Superheat, 2-8 F Filter--Drier, 2-6, 2-12, 5-3, 6-15 Flange Discharge, 2-4, 6-9, 6-34 Suction, 2-4, 6-9, 6-12, 6-34 Fork Lift Pockets, 2-1 Fuses, 2-9, 2-14, 3-1
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INDEX I Frozen Range, 3-17 Heating, 4-6 Perishable Range, 3-14 Indicator, Moisture Liquid, 2-6, 2-12 Inrange Relay, 4-4, 4-6 Moisture Liquid Indicator, 2-6, 2-12 Internal Protector Compressor Motor, 2-14, 5-1, 6-29 Condenser Fan Motor, 2-14, 5-1 Evaporator Fan Motor, 2-14, 5-1, 5-2, 5-3 Power Autotransformer, 6-19 Motor Compressor, 2-4, 5-1, 6-9, 6-29 Condenser Fan, 2-5, 5-3, 6-18, 6-29 Evaporator Fan, 2-1, 2-3, 5-3, 6-16, 6-29 P Interrogator Connector, 2-1 Interrogator Receptacle, 2-3 Pad, Key, 2-7
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INDEX R Receptacle Cargo Probe, 2-3 Interrogator, 2-3 USDA Probe, 2-3 Refrigerant Charge, 2-8, 5-4 Full Charge, 6-7 Leak Checking, 6-6 Partial Charge, 6-7 Recovery, 6-4 Refrigeration Charge, 2-8 Checking Charge, 6-7 Dehydration, 6-6 Evacuation, 6-6 Full Charge, 6-7 Leak Checking, 6-6 Partial Charge, 6-7 Repair, 6-1 System Data, 2-8 Refrigeration Circuit, Water--Cooled Condenser, 2-11 Relay Condenser Fan, 4-4, 4-8 Cooling, 4-4, 4-8 Defrost, 5-2 Heat, 3-15, 4-6, 4-8, 5-2 High Speed Evaporator Fans, 4-8 Inrang
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INDEX T Test Points, Controller, 3-1, 6-28, 6-29 Thermostat, Heat Termination, 2-3, 2-8, 3-12, 3-22, 4-6, 4-8, 5-1, 5-2, 6-29 Transducer Condenser Pressure, 2-6, 2-8, 2-12, 3-13, 3-14, 3-29, 4-4, 5-1 Discharge Pressure, 3-7, 3-13, 3-21, 3-29 Suction Pressure, 3-6, 3-13, 3-29 Transformer, 5-1, 5-2 Bridging Unit, 2-10, 6-19 Control, 2-7 Power, Auto, 5-1, 5-4 Power Auto, 2-4, 2-10 V Vacuum Pump, 6-6, 6-8 Connections, 6-8 Valve Discharge Pressure Regulator, 2-4, 2-12, 5-3 Hermetic Thermostatic Expansion, 2-3,