Carrier 69NT40-511-300 Operation And Service
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Carrier 69NT40-511-300 Operation And Service

Container refrigeration units
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Container Refrigeration
OPERATION AND SERVICE
for
69NT40- -511- -300 to 399
(excluding --310, --344 & --359)
Container Refrigeration Units
T--285 Rev G

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Summary of Contents for Carrier 69NT40-511-300

  • Page 1 Container Refrigeration OPERATION AND SERVICE 69NT40- -511- -300 to 399 (excluding --310, --344 & --359) Container Refrigeration Units T--285 Rev G...
  • Page 2 OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT 69NT40--511--300 to 399 (excluding --310, --344 & --359)
  • Page 3 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.
  • Page 4 SPECIFIC WARNING AND CAUTION STATEMENTS - - Continued WARNING Make sure that the unit circuit breaker(s) (CB-1 & CB-2) and the START-STOP switch (ST) are in the “O” (OFF) position before connecting to any electrical power source. WARNING Never use air for leak testing. It has been determined that pressurized, mixtures of refrigerant and air can undergo combustion when exposed to an ignition source.
  • Page 5 The set screw on the crankshaft must be removed for this type of oil pump. CAUTION Use only Carrier Transicold approved Polyol Ester Oil (POE) - - Mobil ST32 compressor oil with R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil, immediately reseal.
  • Page 6 SPECIFIC WARNING AND CAUTION STATEMENTS - - Continued CAUTION Take necessary steps (place plywood over coil or use sling on motor) to prevent motor from falling into condenser coil. CAUTION If the thermostatic expansion valve is found to be in need of replacement, then the power head and cage assembly are to replaced as a pair.
  • Page 7 TABLE OF CONTENTS PARAGRAPH NUMBER Page GENERAL SAFETY NOTICES ............Safety-1 FIRST AID .

  • Page 8: Table Of Contents

    TABLE OF CONTENTS - - Continued PARAGRAPH NUMBER Page DESCRIPTION ................GENERAL DESCRIPTION .
  • Page 9 TABLE OF CONTENTS - - Continued PARAGRAPH NUMBER Page 3.6.5 Thermistor Format (dCF04) ............3-10 3.6.6 Sampling Type (dCF05 &...
  • Page 10 TABLE OF CONTENTS - - Continued PARAGRAPH NUMBER Page TROUBLESHOOTING ............... . . UNIT WILL NOT START OR STARTS THEN STOPS .
  • Page 11 6.14.1 Checking Superheat............. . . 6-13 6.14.2 Hermetic Valve Replacement .
  • Page 12 LIST OF ILLUSTRATIONS FIGURE NUMBER Page Figure 2-1 Refrigeration Unit -- Front Section ........... . . Figure 2-2 Evaporator Section .
  • Page 13 LIST OF ILLUSTRATIONS (continued) FIGURE NUMBER Page Figure 6-25 Jumper Assembly ..............6-18 Figure 6-26 Controller Section of the Control Box .
  • Page 14 LIST OF TABLES TABLE NUMBER Page Table 2-1 Safety and Protective Devices ............Table 3-1 Key Pad Function .
  • Page 15 18 and 24 volts, single phase. The unit may be fitted with suction and discharge pressure gauges or suction and discharge transducers The controller is a Carrier Transicold Micro-Link 2i or no pressure readout. The transducer readings may microprocessor.
  • Page 16 (attached to the condenser coil cover). 1.3.26 Humidification The unit may be equipped with the Carrier Transicold 1.3.16 Thermometer Port NatureFresh humidity management system. The system includes a water tank, water pump, water heater...
  • Page 17 The identification label on each controller will have the digit dash number. See the unit identification Matrix part number as shown above followed by a dash and found Carrier site, then a blank space to allow the final dash number to be www.container.carrier.com.

  • Page 18: Description

    SECTION 2 DESCRIPTION 2.1 GENERAL DESCRIPTION evaporator coil heaters. The unit model number, serial number and parts identification number can be found on 2.1.1 Refrigeration Unit - - Front Section the serial plate to the left of the compressor. The unit is designed so that the majority of the 2.1.2 Fresh Air Makeup Vent components are accessible from the front, see Figure 2-1.

  • Page 19: Evaporator Section

    2.1.3 Evaporator Section The evaporator fans circulate air through the container by pulling it in the top of the unit, directing it through the The evaporator section (Figure 2-2) contains the evaporator coil, where it is heated or cooled, and temperature recorder bulb or return recorder sensor, discharging it at the bottom.

  • Page 20: Compressor Section

    2.1.4 Compressor Section modulating valve stepper motor drive, discharge pressure regulator valve discharge/suction The compressor section includes the compressor (with pressure transducers. high pressure switch), power cable storage The supply temperature sensor, supply recorder sensor compartment, and autotransformer. and ambient sensor are located at the right side of the This section also contains the suction modulating valve, compressor.

  • Page 21: Air Cooled Condenser Section

    2.1.5 Air Cooled Condenser Section line valve, filter-drier, condenser pressure transducer and fusible plug. The air cooled condenser section (Figure 2-4) consists The condenser fan pulls air in the bottom of the coil and it of the condenser fan, condenser coil, receiver with sight is discharged horizontally out through the condenser fan glass/moisture indicator, quench valve, manual liquid grille.

  • Page 22: Water-Cooled Condenser Section

    2.1.6 Water-Cooled Condenser Section quench expansion valve, rupture disc, condenser pressure transducer, filter-drier, water couplings and The water-cooled condenser section (Figure 2-5) water pressure switch. The water cooled condenser consists of a water-cooled condenser, sight glass, replaces the standard unit receiver. Sight Glass Liquid Line Service Valve Water-Cooled Condenser...

  • Page 23: Control Box Section

    2.1.7 Control Box Section 2.1.8 Communications Interface Module The control box (Figure 2-6) includes the manual The communications interface module is a slave operation switches; circuit breaker (CB-1); compressor, module which allow communication with a master fan and heater contactors; control power transformer; central monitoring station.

  • Page 24: Refrigeration System Data

    2.2 REFRIGERATION SYSTEM DATA Number of Cylinders Model 06DR Weight (Dry) 118 kg (260 lb) a Compressor/Motor a. Compressor/Motor Approved Oil Mobil ST32 Assembly Assembly Oil Charge 3.6 liters (7.6 U.S. pints) The oil level range, with the compressor off, should be between the bottom and one-eighth Oil Sight Glass level of the sight glass.

  • Page 25: Electrical Data

    2.3 ELECTRICAL DATA CB-1 Trips at 29 amps CB-2 (50 amp) Trips at 62.5 amps a. Circuit Breaker a. Circuit Breaker CB-2 (70 amp) Trips at 87.5 amps 17.6 amps @ 460 vac b. Compressor Full Load Amps (FLA) Motor (with current limiting set at 21 amps) 380 vac, Single Phase, 460 vac, Single Phase,...

  • Page 26: Safety And Protective Devices

    Orange wire Power Red wire Output Brown wire Ground Input voltage 5 vdc Output voltage 0 to 3.3 vdc i. Humidity Sensor Humidity Sensor Output voltage readings verses relative humidity (RH) percentage: 0.99 V 1.65 V 2.31 V 2.97 V j.

  • Page 27: Refrigeration Circuit

    2.5 REFRIGERATION CIRCUIT outlet. The valve maintains a constant superheat at the coil outlet regardless of load conditions. Starting at the compressor, (see Figure 2-7 upper During periods of low load, the suction modulating valve schematic) the suction gas is compressed to a higher decreases flow of refrigerant to the compressor.

  • Page 28: Figure 2-7 Refrigeration Circuit Schematic

    EVAPORATOR TXV BULB CONDENSER HEAT EXCHANGER PRESSURE REGULATOR PRESSURE TRANSDUCER SERVICE VALVE QUENCH VALVE PRESSURE TRANSDUCER MODULATING VALVE FUSIBLE PLUG FILTER DRIER SIGHT GLASS Legend SERVICE VALVE Discharge RECEIVER Liquid Circuit with Receiver Suction EVAPORATOR TXV BULB CONDENSER HEAT EXCHANGER FUSIBLE PLUG PRESSURE REGULATOR MODULATING VALVE...

  • Page 29: Microprocessor

    SECTION 3 MICROPROCESSOR 3.1 TEMPERATURE CONTROL MICROPRO- and cargo temperature parameters for future retrieval. CESSOR SYSTEM Coverage of the temperature control software begins with paragraph 3.2. Coverage of the DataCORDER The temperature control Micro-Link 2i microprocessor software is provided in paragraph 3.6. system (see Figure 3- 1) consists of a key pad, display module, control module (controller) and interconnecting wiring.

  • Page 30: Display Module

    3.1.1 Key Pad Table 3-1 Key Pad Function The key pad (Figure 3- 2) is mounted on the right-hand FUNCTION side of the control box. The key pad consists of eleven push button switches that act as the user’s interface Code Select Accesses function codes.

  • Page 31: Controller

    Mounting Screw Fuses Micro-Link 2i Control Circuit Power Connection Controller (Location: In back of controller) Connectors Software Programming Port Test Points Battery Pack Figure 3- 4 Micro-Link 2i Controller 3.1.3 Controller f. Provide the ability to reprogram the software through the use of a memory card.

  • Page 32: Temperature Control -- Perishable Mode

    Software will change if any one of the inputs changes. current draw. The factory default allows on demand Overall interaction of the inputs is described as a “mode” starting of units and full current draw. Refer to Table 3-5. of operation. The modes of operation include, 3.3.6 Condenser Pressure Control perishable (chill) mode and frozen mode.

  • Page 33: Perishable Mode -- Economy

    de-energize when the temperature rises to 0.2_C humidity. When the relative humidity sensed is 2% (0.4_F) below the set point. The compressor will not below the set point , the controller de-energizes the heat restart until the temperature rises to 0.2_C (0.4_F) relay.

  • Page 34: Temperature Control -- Frozen Mode

    3.3.12 Temperature Control - - Frozen Mode 3.4 CONTROLLER ALARMS With configuration variable CnF26 set to --10_C the Alarm display is an independent controller software frozen mode of operation is active with set points at or function. If an operating parameter is outside of below - -10_C (+14_F).

  • Page 35: Unit Pre-Trip Diagnostics

    Function Codes. There are 35 functions (see used with the Carrier Transicold Data Reader to down Table 3-8, page 3-25) which the operator may access to load data. A personal computer with Carrier Transicold examine the current input data or stored data.

  • Page 36: Sensor Configuration (Dcf02)

    3 USDA thermistor inputs 7 sensors configuration to generic and selecting which data points (dCF02=64) 1 humidity input to record may be done using the Carrier Transicold Data 1 cargo probe (thermistor input) Retrieval Program. 2 thermistor inputs(supply & return) 1. Control mode...

  • Page 37: Figure 3- 5 Standard Configuration Report

    Raw Data Report for ABC1234567 May 31, 2001 to Jun 04, 2001 System Configuration at the Time of Interrogation: Interrogated On Sept 05, 2001 Extracted by DataLine Rev 1.0.0 Controller Software: 5120 Controller Serial #: 04163552 Bill of Lading #: 1 Origin: Origin Date: Destination:...

  • Page 38: Logging Interval (Dcf03)

    If the probes are configured to AUTO, they act as a group. This function is designed to assist users who The Carrier Transicold Data Reader (see Figure 3- 6) is keep their DataCORDER configured for USDA a simple to operate hand held device designed to extract recording, but do not install the probes for every trip.

  • Page 39: Usda Cold Treatment

    In response to the demand to replace fumigation with this environmentally sound process, Carrier has e. To initiate USDA Recording, connect the personal integrated...

  • Page 40: Table 3-4 Controller Configuration Variables

    “AA##,” if the alarm is active, where ## is the alarm 1. Press the ALT. MODE & ALARM LIST keys. number. “IA##,” will show if the alarm is inactive 2. Press the UP/DOWN ARROW key until “CLEAr” is displayed. d. “END” is displayed to indicate the end of the alarm list if any alarms are active.

  • Page 41: Table 3--4 Controller Configuration Variables (Continued)

    Table 3- -4 Controller Configuration Variables (continued) CONFIGURATION TITLE DEFAULT OPTION NUMBER CnF40 Demand Defrost CnF41 Lower DTT Setting CnF42 Auto Pre--trip Start CnF47 Fresh Air Vent Position Sensor UPP, LOW CnF48 CFS Override CnF49 Datacorder Configuration Restore CnF50 Enhanced Bulb Mode Selection Bulb, dEHUM CnF51 Timed Defrost Disable...

  • Page 42: Table 3-5 Controller Function Codes (Sheet 1 Of 4)

    Table 3-5 Controller Function Codes (Sheet 1 of 4) Code TITLE DESCRIPTION Note: If the function is not applicable, the display will read “-- -- -- -- -- ” Display Only Functions Displays the SMV percent open. The right display reads 100% when the valve is Cd01 Suction Modulation fully open and 0% when the valve is fully closed.
  • Page 43 Table 3-5 Controller Function Codes (Sheet 2 of 4) Cd22 Compressor Speed The status of the compressor is displayed (high, low or off). Cd23 Evaporator Fan Displays the current evaporator fan state (high, low or off). Cd24 Controlled Not used in this application Atmosphere State Compressor Run This code displays the time remaining until the unit goes into defrost (in tenths of...
  • Page 44 Table 3-5 Controller Function Codes (Sheet 3 of 4) The stagger start offset time is the amount of time that the unit will delay at start- Cd31 Stagger Start Offset up, thus allowing multiple units to stagger their control initiation when all units are Time (Seconds) powered up together.
  • Page 45 Table 3-5 Controller Function Codes (Sheet 4 of 4) Display Only Functions - - Continued Code Cd38 will display the current secondary supply temperature sensor reading Cd38 Secondary Supply for units configured for four probes. If the unit is configured with a DataCORDER, Cd38 will display “-- -- -- -- -- .”...
  • Page 46 Figure 3- 1Table 3-6 Controller Alarm Indications (Sheet 1 of 3) Code TITLE DESCRIPTION Alarm 11 is applicable to units with Single Evaporator Fan Capability (CnF32 set AL11 Evaporator Motor 1 to 1EFO) only. The alarm is triggered if the evaporator fan motor #1 internal pro- IP Trip tector opens.
  • Page 47 Table 3-6 Controller Alarm Indications (Sheet 2 of 3) Alarm 53 is caused by the battery pack charge being too low to provide sufficient power for battery-backed recording. Renew replaceable batteries. If this alarm AL53 Battery Pack Failure occurs on start up, allow a unit fitted with rechargeable batteries to operate for up to 24 hours to charge rechargeable batteries sufficiently to deactivate the alarm Alarm 54 is activated by an invalid primary supply temperature sensor reading that is sensed outside the range of --50 to +70_C (--58_F to +158_F) or if the...
  • Page 48 Table 3-6 Controller Alarm Indications (Sheet 3 of 3) Alarm 64 is triggered if the discharge temperature sensed is greater than 135_C AL64 Discharge Tempera- (275_F) for three continuous minutes, if it exceeds 149_C (300_F), or if the sen- ture Over Limit sor is out of range.

  • Page 49: Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 Of 4)

    Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4) Code TITLE DESCRIPTION NOTE “Auto” or “Auto1” menu includes the: P, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu in- cludes P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.“Auto3 menu includes P, P1, P2, P3, P4, P5, P6, P7, P8 and rSLts All lights and display segments will be energized for five seconds at the start of Pre-Trip Initiated...
  • Page 50 Table 3-7 Controller Pre-Trip Test Codes (Sheet 2 of 4) Requirements: For units equipped with secondary supply probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (supply) is compared. P5-1 Supply Probe Test NOTE If this test fails, “P5-1” and FAIL will be displayed. If both Probe tests (this and the SUPPLY/ RETURN TEST) pass, because of the multiple tests, the display will read ’P 5’...
  • Page 51 Table 3-7 Temperature Controller Pre-Trip Test Codes (Sheet 3 of 4) Note, this test is skipped if the unit does NOT have: A compressor discharge sensor (CPDS). A discharge pressure transducer (DPT). Condenser pressure transducer (CPT). In addition, this test is skipped if: The sensed ambient temperature is less than 7_C (45_F).
  • Page 52 Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4) Requirements: Test P8-1 must pass for this test to execute. Setup: The left display will read “P8-2,” and the right display will show the supply air temperature. A 60 minute timer is started. The unit will be required to main- tain the 0°C temperature to within + or -- 0.5_C (0.9_F) of set point until a Data- CORDER recording is executed.

  • Page 53: Table 3-8 Datacorder Function Code Assignments

    Table 3-8 DataCORDER Function Code Assignments NOTE Inapplicable Functions Display “-- -- -- -- -- ” To Access: Press ALT. MODE key Code TITLE DESCRIPTION Recorder Supply Current reading of the supply recorder sensor. Temperature Recorder Return Current reading of the return recorder sensor. Temperature USDA 1,2,3 Temper- dC3-5...

  • Page 54: Table 3-9 Datacorder Pre-Trip Result Records

    Table 3-9 DataCORDER Pre-Trip Result Records Test TITLE DATA Heater On Pass/Fail/Skip Result, Change in current for Phase A, B and C Heater Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C Pass/Fail/Skip Result, Water pressure switch (WPS) -- Open/Closed, Condenser Fan On Change in currents for Phase A, B and C Condenser Fan Off...

  • Page 55: Table 3-10 Datacorder Alarm Indications

    Table 3-10 DataCORDER Alarm Indications To Access: Press ALT. MODE key Code No. TITLE DESCRIPTION The supply recorder sensor reading is outside of the range of --50_C to 70_C (--58_F to +158_F) or, the probe check logic has determined there is a fault with this sensor.

  • Page 56: Operation

    SECTION 4 OPERATION 4.1 INSPECTION (Before Starting) 4.2.2 Connection to190/230 vac Power An autotransformer (Figure 4-1) is required to allow WARNING operation on nominal 230 volt power. It is fitted with a 230 vac cable and a receptacle to accept the standard Beware of unannounced starting of the 460 vac power plug.

  • Page 57: Fresh Air Vent Position Sensor (Vps)

    clear the gap between the slots, loosen the wing nut until position (100% position). The closed position is 0% air the disc clears the stop. Figure 4-2 gives air exchange flow position.The operator may also adjust the opening values for an empty container. Higher values can be to increase or decrease the air flow volume to meet the expected for a fully loaded container.

  • Page 58: Water-Cooled Condenser With Condenser Fan Switch

    4.4.2 Water-Cooled Condenser with Condenser Check and, if required, reset controller Function Codes Fan Switch (Cd27 through Cd39) in accordance with desired operating parameters. Refer to paragraph 3.2.2. a. Connect the water supply line to the inlet side of con- 4.7.3 Start Temperature Recorder denser and the discharge line to the outlet side of the condenser.

  • Page 59: Observe Unit Operation

    three automatic tests (depending on software revision CAUTION installed). These tests will automatically perform a When a failure occurs during automatic series of individual pre--trip tests. The user may also testing the unit will suspend operation scroll down to select any of the individual tests. The awaiting operator intervention.

  • Page 60: Probe Check

    power to the unit. The heater is connected to a set of In this configuration, a probe check will not be run as a normally closed auxiliary contacts on the compressor part of a normal defrost, but only as a part of a defrost contactor.

  • Page 61: Sequence Of Operation -- Perishable Mode Cooling

    FALLING RISING TEMPERATURE TEMPERATURE +1.5 C (2.7 C (1.8 COOLING COOLING +0.5 C (0.9 +.20 SET POINT - -0.20 - -0.5 C (0.9 - - 1 C (1.8 CIRCULATION CIRCULATION ONLY ONLY - - 1.5 C (2.7 Figure 4-4 Controller Operation - - Frozen Mode NOTE ENERGIZED DE- -ENERGIZED...

  • Page 62: Sequence Of Operation -- Perishable Mode Heating

    4.10.2 Sequence Of Operation - - fan motors (ES) energized and the COOL light illumi- Perishable Mode Heating nated. (See Figure 4-7.) b.When the air temperature decreases to a predeter- NOTE mined tolerance above set point, the in-range light is The unit will heat only when in the Perishable illuminated.

  • Page 63: Figure 4-8 Defrost

    Manual Defrost/Interval key operation: When a request for defrost is made by demand defrost , the unit will enter defrost when the reading at the Defrost Depressing and holding the Defrost Interval key for Temperature Sensor is at or below 18°C (64.4°F). five (5) seconds will initiate defrost.

  • Page 64: Emergency Operation

    4.11 EMERGENCY OPERATION 4.11.2 Emergency Defrost Operation. Operation by the refrigeration controller may be To place the unit in the emergency defrost mode of overridden by use of the EMERGENCY BYPASS or by operation, cut the wire tie installed at the switch use of the EMERGENCY DEFROST switch.
  • Page 65 SECTION 5 TROUBLESHOOTING REMEDY/ REFERENCE CONDITION POSSIBLE CAUSE SECTION 5.1 UNIT WILL NOT START OR STARTS THEN STOPS External power source OFF Turn on Start-Stop switch OFF or defective Check No power to unit No power to unit Circuit breaker tripped or OFF Check Autotransformer not connected 4.2.2...
  • Page 66 REMEDY/ CONDITION POSSIBLE CAUSE REFERENCE SECTION 5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING Compressor Compressor valves defective Abnormal pressures Controller malfunction Evaporator fan or motor defective 6.16 Refrigeration System Refrigeration System Suction modulation valve malfunction 6.18 Condenser Pressure Transducer defective Check Shortage of refrigerant 6.7.1...

  • Page 67: Figure 6-6 Compressor

    REMEDY/ CONDITION POSSIBLE CAUSE REFERENCE SECTION 5.6 UNIT WILL NOT DEFROST PROPERLY - -Continued Frequent defrost Wet load Normal Will not terminate defrost Unit in Emergency Defrost mode 4.11.2 5.7 ABNORMAL PRESSURES (COOLING) Condenser coil dirty 6.10 Condenser fan rotating backwards 6.11 Condenser fan inoperative 6.11...
  • Page 68 REMEDY/ CONDITION POSSIBLE CAUSE REFERENCE SECTION 5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW Frost on coil Evaporator coil blocked Evaporator coil blocked Dirty coil 6.15 Evaporator fan motor internal protector open 6.16 Evaporator fan motor(s) defective 6.16 No or partial evaporator air flow No or partial evaporator air flow Evaporator fan(s) loose or defective 6.16...

  • Page 69: Figure 6-1 Service Valve

    (see Figure 6-3) is required for service of the models covered within this manual. The manifold gauge/hose set is available from Carrier Transicold. (Carrier Transicold P/N 07-00294-00, which includes items 1 through 6, Figure 6-3.) To perform service using the manifold gage/hose set, do the following: a.

  • Page 70: Figure 6-3 R-134A Manifold Gauge/Hose Set

    5. Front seat both manifold gauge set valves and dis- connect from cylinder. The gauge set is now ready for use. To Low Side To High Side Service Port Service Port 7-BLUE 8-YELLOW Blue 9-RED - Red - Yellow 1. Discharge Service 7.
  • Page 71 After repairs have been made, be sure to perform a volume displacement) and an electronic vacuum refrigerant leak check (refer to paragraph 6.5), and gauge. (The pump is available from Carrier Trans- evacuate and dehydrate the low side (refer to para- icold, P/N 07-00176-11.) graph 6.6).

  • Page 72: Figure 6-5. Compressor Service Connections

    6.7 REFRIGERANT CHARGE 6.7.1 Checking the Refrigerant Charge NOTE To avoid damage to the earth’s ozone layer, use a refrigerant recovery system whenever remov- ing refrigerant. When working with refrigerants you must comply with all local government envi- ronmental laws. In the U.S.A., refer to EPA sec- tion 608.
  • Page 73 e. Partially frontseat (turn clockwise) the suction service valve and slowly add charge until the refrigerant appears at the proper level . 6.8 COMPRESSOR WARNING Make sure power to the unit is OFF and power plug disconnected before replacing the compressor. NOTES The compressor should not operate in a vacuum greater than 500 mm/hg (20...

  • Page 74: Figure 6-7 Exploded View Of Valve Plate

    6.8.2 Compressor Disassembly WARNING Before disassembly of any external com- pressor component make sure to relieve possible internal pressure by loosening the bolts and tapping the component with a soft hammer to break the seal. CAUTION Removing the compressor motor press-fit 1.

  • Page 75: Figure 6-9 Oil Pump And Bearing Head

    h. Be very careful not to damage the motor windings Set screw must be removed. when removing motor end cover (see Figure 6-11), as the cover fits over the winding coils. Loosen the cap screws, break the seal and then re- move all capscrews except one in the top of the cover.

  • Page 76: Figure 6-12 Equalizing Tube And Lock Screw Assembly

    difficult to reinstall used valves so that they will seat as before removal. Any valve wear will cause leakage. 1. Equalizer Tube and 3. Counterweight -- Lock Screw Assembly Motor End 2. Lockwasher Figure 6-12 Equalizing Tube and Lock Screw Assembly 1.
  • Page 77 6.8.6 Compressor Oil Level 6.8.6. d. Removing Oil from the Compressor CAUTION Use only Carrier Transicold approved 1 If the oil level is above one-eighth sight glass, oil must be removed from the compressor. Polyol Ester Oil (POE) - - Castrol-Icematic SW20 compressor oil with R-134a.

  • Page 78: Figure 6-16 High Pressure Switch Testing

    6.9 HIGH PRESSURE SWITCH 6.10 CONDENSER COIL The condenser consists of a series of parallel copper 6.9.1 Replacing High Pressure Switch tubes expanded into copper fins. The condenser coil a. Turn unit start-stop switch OFF. Frontseat both suc- must be cleaned with fresh water or steam so the air flow tion and discharge service valves to isolate compres- is not restricted.
  • Page 79 refrigerant vapor is admitted to the shell side and is c. De-scale water tubes with Oakite No. 32 to remove condensed on the outer surface of the coil. scale. Rust, scale and slime on the water-cooling surfaces d. Flush. inside of the coil interfere with the transfer of heat, e.

  • Page 80: Figure 6-18 Water Cooled Condenser Cleaning - Gravity Circulation

    6 Allow the Oakite No. 32 solution to soak in the tube coils for several hours, periodically pump-circulating Fill condenser with clean- it with an acid-proof pump. ing solution. Do not add solution more rapidly than vent can exhaust gases An alternate method may be used whereby a pail caused by chemical (see Figure 6-18) filled with the solution and...

  • Page 81: Figure 6-19 Thermostatic Expansion Valve Bulb

    1. Automatic control of the refrigerant flow to match the f. From the temperature/pressure chart (Table 6-9), de- evaporator load. termine the saturation temperature corresponding to the evaporator outlet test pressures at the suction 2. Prevention of liquid refrigerant entering the com- modulation valve.

  • Page 82: Figure 6-21 Hermetic Thermostatic Expansion Valve Brazing Procedure

    Braze Rod (’Sil-Phos” = 5.5% Silver, 6% Phosphorus) Copper Tube (Apply heat for 10-15 seconds) Bi-metallic Tube Connection Use of a wet cloth is not neces- (Apply heat for 2-5 seconds) sary due to rapid heat dissipation of the bi--metallic connections Figure 6-21 Hermetic Thermostatic Expansion Valve Brazing Procedure 2.

  • Page 83: Figure 6-23. Evaporator Fan Assembly

    into the indentation of the suction line. See 6.16.1 Replacing The Evaporator Fan Assembly Figure 6-19 for bulb placement. WARNING 4 Check superheat. (Refer to paragraph 6.14.2 step Always turn OFF the unit circuit breakers 6.14.1 ) Container box temperature should be at (CB-1 &...

  • Page 84: Figure 6-24 Suction Modulation Valve (Smv)

    a. Assemble the motor and plastic spacer onto the sta- WARNING tor. With power OFF discharge the capacitor before disconnecting the circuit wiring. b. Apply loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds). 6.17.3 Checking The Capacitor c.
  • Page 85 Checking with SMA-12 portable stepper drive tester eration for a few minutes. While in pulldown the unit The SMA-12 portable stepper drive tester (Carrier will open the SMV to a maximum discharge pressure Transicold P/N 07-00375-00) is a battery operated...

  • Page 86: Figure 6-25 Jumper Assembly

    “C” and “D” can be checked as follows: the “ON” position. If the circuit breakers do not hold in, check voltage supply. 1. Install a jumper assembly (Carrier part number 07--00408--00) to connect the drive module and con- c. There is no internal protector for this transformer troller connectors as shown in Figure Figure 6-25.

  • Page 87: Figure 6-26 Controller Section Of The Control Box

    Figure 6-26 Controller Section of the Control Box 3. After the enter key has been pressed the display will read CAL (for calibration). a. Obtain a grounding wrist strap (Carrier Transicold part number 07--00--304--00)and a static dissipation mat (Carrier Transicold part number 07--00304--00.
  • Page 88 TP 4 6. The Display will show the message “Pro SoFt.” This message will last for up to one minute. This test point enables the user to check if the internal 7. The Display module will read “Pro donE” when the protector for the condenser fan motor(IP-CM) is open or software loading has loaded.

  • Page 89: Figure 6-27 Sensor Types

    value for the connectors (MA, MB, MC, KA & KB) is 0.12 (9 inches). Slide the cap and grommet off well mkg (10 inch-pounds). mounted sensor and save for possible reuse. Do not cut the grommet. 6.21.5 Battery Replacement c. If required, prepare the replacement sensor by cut- If required, use tool 07-00418-00.

  • Page 90: Figure 6-28 Sensor And Cable Splice

    CAUTION NOTE Do not allow moisture to enter wire splice The P5 Pre-Trip test must be run to inactivate area as this may affect the sensor resis- probe alarms (refer to paragraph 4.8). tance. m. Reinstall sensor, refer to paragraph 6.22.3. REPLACEMENT 2 WIRE TO 2 WIRE OR 3 WIRE TO 3 WIRE BLACK...
  • Page 91 6.23 ELECTRONIC PARTLOW TEMPERATURE If the optional DataCORDER battery pack is being used, RECORDER and the charge is too low to enable recording during the power off period of less than two days, the pen tip will The microprocessor based temperature recorder is move to below the inner chart ring for the period when no designed to interface with the DataCORDER to log data was recorded by the DataCORDER.

  • Page 92: Figure 6-31. Electronic Partlow Temperature Recorder

    Recorder Door Connector Change Chart Button Calibration Button (Located underneath) Recorder Box Mounting Screws, #10-24 x 7/16 inches long Pen Tip Hold Down Tab Stylus Arm Chart Retaining Nut Figure 6-31. Electronic Partlow Temperature Recorder 6.23.3Adjusting the Recorder Stylus 6.23.4Rezeroing the Recording Thermometer Electronic Partlow Recorder...

  • Page 93: Table 6-2 Temperature-Resistance Chart

    Electronic Partlow Recorder The temperature recorder may be fitted with a 12-00464-01: thermistor probe (Simpson accessory #344) attached at the recorder bulb. The thermistor wiring is brought from NOTE the bulb location to a receptacle located in the chart platen of the recorder. If a thermistor is provided, the Use chart CTD P/N 09-00128-00 (°F) recorder chart reading may be checked using a P/N 09-00128-01 (°C).
  • Page 94 should be stabilized at a temperature of 0°C (32°F). This (clockwise) lowers stylus reading. Then retighten set screw. is accomplished by using one of the two following methods, whichever is more convenient. 3 Reset control at 0°C (32°F), start the refrigeration unit and repeat accuracy check.

  • Page 95: Figure 6-32. Partlow Mechanical Temperature Recorder

    Mechanical Temperature Set Screw Recorder Bulb Pinion Shaft Element Recorder Door Recorder Box Stylus 31 Day Clock Clock Winding Key Mechanism and Platen Assembly Push Rod Figure 6-32. Partlow Mechanical Temperature Recorder 6.25 SAGINOMIYA TEMPERATURE RECORDER a. Install new chart on platen. b.

  • Page 96: Figure 6-33. Saginomiya Temperature Recorder

    temperature. Rotate the chart by hand. The b. Remove nut and bushing (item 18, Figure 6-33). indicated temperature should be 0°C (32°F). c. Install replacement probe and bushing. Seal with 6.25.3Replacing Sensor Probe silicone before securing to case. a. Remove box from unit. d.

  • Page 97: Figure 6-34 Door Hinge Repair

    6.27 COMPOSITE CONTROL BOX REPAIRS become stripped, or if the insert becomes loose. The inserts and epoxy are contained in repair kit, Carrier 6.27.1 Introduction Transicold part number 76-50084-00 (see Table 6-4).

  • Page 98: Table 6-3 Crack, Chip & Hole Repair Kit

    Static Mixing Tube (Loctite 983440) 07--00390--00 . . . Instruction Sheet 98--02338--00 Note: Insert repair procedures require use of an Application Gun, Carrier part number 07--00391--00 (Loctite 983435) Table 6-5 Drill Information Item Insert part number Drill size and depth 34- 06231- 01 10.3 mm x 17.8 mm deep (.404 in.

  • Page 99: Figure 6-35. Insert Location

    Figure 6-35. Insert Location T-285 6-31...

  • Page 100: Figure 6-36. Communications Interface Installation

    6.28 COMMUNICATIONS INTERFACE MODULE c.. Remove the circuit breaker panel, with circuit INSTALLATION breaker, from the control box. d.. Locate, wires CB21/CIA3, CB22/CIA5 CB23/CIA7 that have been tied back in the wire harness. Remove the protective heat shrink from the ends of the wires. e..

  • Page 101: Table 6-7 Wear Limits For Compressors

    Table 6-7 Wear Limits For Compressors MAXIMUM WEAR MAXIMUM WEAR FACTORY MAXIMUM FACTORY MAXIMUM FACTORY MINIMUM FACTORY MINIMUM BEFORE REPAIR PART NAME PART NAME inches inches inches MAIN BEARING Main Bearing Diameter 1.6268 41.3207 .0020 0.0508 Main Bearing Journal Diameter 1.6233 41.2318 .0020...

  • Page 102: Table 6-9 R-134A Temperature - Pressure Chart

    Table 6-9 R-134a Temperature - Pressure Chart Temperature Vacuum Temperature Pressure _ _ _ _ F _ _ _ _ C “/hg cm/hg kg/cm@ @ @ @ _ _ _ _ F _ _ _ _ C psig kg/cm@ @ @ @ --40 --40 14.6...

  • Page 103: Figure 6-37 R-134A Compressor Pressure And Motor Current Curves Versus Ambient Temperature

    Note: Curves to be used as troubleshooting guide only for model series 69NT40 with fresh air makeup vent closed, unit powered on 460 VAC/60hz and SMV 100% open. (Bar) psig (22.0) (20.7) (19.3) (17.9) 35_F (1.7_C) (16.6) (15.2) (13.8) (12.4) (11.0) (9.7) (8.3)
  • Page 104 (Bar) psig (.97) (.83) (.69) (.55) 35_F (1.7_C) Box (.41) (.28) (.14) 0_F (--17.8_C) Box (- -.14) - -2 (- -.28) - -4 (- -.41) - -6 (48.9) (_C) (15.6) (21.1) (26.7) (32.2) (37.8) (43.3) Ambient Air Temperature Compressor Suction Pressure Versus Ambient Air Temperature at Stable Box Temperature 35_F (1.7_C) Box 0_F (--17.8_C) Box (_C)
  • Page 105 SECTION 7 ELECTRICAL WIRING SCHEMATIC 7.1 INTRODUCTION This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows: Figure 7-1 Provides the legend for use with all figures. Figure 7-2 Provides the schematic diagram for units with normal evaporator fan operation. Figure 7-3 Provides the schematic diagram for units with single evaporator fan capability.

  • Page 106: Figure 7-1 Legend

    LEGEND SYMBOL DESCRIPTION (Schematic Location) SYMBOL DESCRIPTION (Schematic Location) AMBS AMBIENT SENSOR (E- -19) HUMIDITY SENSOR (G- -20) BYPASS MODULE (D- -20) HOSE HEATER SAFETY THERMOSTAT (G- -14) CIRCUIT BREAKER - - 460 VOLT (J- -1) HEAT TERMINATION THERMOSTAT (F- -12) CIRCUIT BREAKER - - AUTO TRANSFORMER (D- -1) HUMIDITY WATER HEATER (Figure 7-4) CRANKCASE HEATER (T- -2)

  • Page 107: Figure 7-2 Schematic Diagram -- Normal Evaporator Fan Operation

    6 Heater 5 Heater RRS (SINGLE SENSOR ONLY) (COMBINATION SENSOR ONLY) (or VPS See fig 7- -4) Figure 7-2 SCHEMATIC DIAGRAM - - Normal Evaporator Fan Operation T-285...

  • Page 108: Figure 7-3 Schematic Diagram -- Single Evaporator Fan Capability

    6 Heater 5 Heater RRS (SINGLE SENSOR ONLY) (COMBINATION SENSOR ONLY) Figure 7-3 SCHEMATIC DIAGRAM - - Single Evaporator Fan Capability T-285...

  • Page 109: Figure 7-4 Schematic Diagram -- Transfresh, Vent Position Sensor (Vps), Humidity And Recorders

    SEE FIGURE SEE FIGURE 7--2 or 7--3 7--2 or 7--3 TO DL, TERMINAL C SEE SEE FIGURE 7--2 or 7--3 TransFRESH CONTROLLER VENT POSITION SENSOR Note: DPT may not be installed if unit is equipped with VPS SEE FIGURE 7--2 or 7--3 SEE FIGURE 7--2 or 7--3 SEE FIGURE...

  • Page 110: Figure 7-5 Wiring Diagram -- Normal Evaporator Fan Operation , Units With Dual Capacitor Evaporator Fan Motors

    4 Heaters 6 Heaters T11 T4 T3 T2 T1 P2 P1 T11 T4 T3 T2 T1 P2 P1 [DF11] ECD3 COMBINATION [ED5] SINGLE SENSOR J G F E D C J G F E D C SENSOR CONFIGURATION ECE3 [ED8] TRC1 TRC2 WIRES TO TR X2...
  • Page 111 FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7- -7 (COMBINATION SENSOR ONLY) [ED6] [ED9] NOTE: RM MAY BE OUTSIDE BOX SDDC [BMDC] SDON [BMON] HPRB SDGD [BMGD] [ED3] CFA1 SDS1 [CFS2] [BMS1] SDS2 [BMS2] SINGLE SENSOR ONLY (UNITS WITHOUT ED ONLY) [ED12]...

  • Page 112: Figure 7-6 Wiring Diagram -- Single Evaporator Fan Capacity , Units With Dual Capacitor Evaporator Fan Motors

    6 HEATERS 4 HEATERS T11 T4 T3 T2 T1 P2 P1 T11 T4 T3 T2 T1 P2 P1 [DF11] ECD3 COMBINATION SINGLE SENSOR [ED5] J G F E D C J G F E D C SENSOR CONFIGURATION ECE3 [ED8] TRC2 TRC1 EM2A...
  • Page 113 FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7- -7 (COMBINATION SENSOR ONLY) E1A2 [ED6] (WHT) [ED9] NOTE: RM MAY BE OUTSIDE BOX SDDC [BMDC] SDON [BMON] SDGD [BMGD] [ED3] DPTB DPTC CFA1 SDS1 [CFS2] [BMS1] S1L4 E1F4 SDS2 [BMS2]...

  • Page 114: Figure 7-7 Wiring Diagram -- Normal Evaporator Fan Operation , Units With Single Capacitor Evaporator Fan Motors

    [DF11] ECD3 [ED5] SINGLE SENSOR COMBINATION ECE3 CONFIGURATION SENSOR [ED8] TRC2 TRC1 WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EFA2, HRA2, CR8, HPRB, HRA2,HPT5 & DHH (SEE Figure 7-9) (ICF MAY BE IN CONTROL BOX) NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD.
  • Page 115 FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7- -7 (COMBINATION SENSOR ONLY) [ED6] [ED9] NOTE: RM MAY BE OUTSIDE BOX SDDC [BMDC] SDON [BMON] HPRB SDGD [BMGD] [ED3] DPTB [VPS2] [VPS1] DPTC [VPS3] CFA1 SDS1 [CFS2] [BMS1] SDS2 [BMS2]...

  • Page 116: Figure 7-8 Wiring Diagram -- Single Evaporator Fan Capacity , Units With Single Capacitor Evaporator Fan Motors

    6 Heaters [DF11] ECD3 COMBINATION SINGLE SENSOR [ED5] SENSOR CONFIGURATION ECE3 [ED8] TRC2 TRC1 EM2A E2A2 E2A2 EM2A WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EM1B, EM2B, HRA2 DHH & CR8 (SEE Figure 7-9) (ICF MAY BE IN CONTROL BOX) NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD.
  • Page 117 FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7- -7 (COMBINATION SENSOR ONLY) E1A2 [ED6] (WHT) [ED9] NOTE: RM MAY BE OUTSIDE BOX SDDC [BMDC] SDON [BMON] SDGD [BMGD] [ED3] CFA1 SDS1 [CFS2] [BMS1] S1L4 E1F4 SDS2 [BMS2] S2A2 SINGLE...

  • Page 118: Figure 7-9 Wiring Diagram -- Electronic Partlow Temperature Recorder

    FROM TRX1 SEE Figure 7-6 SHEET 1 NOTE: STANDARD CONTROLLER JUMPERS: MA3 TO MA7 AND MA9 TO MA11 (SEE Figure 7-2 SHEET 1) ARE REMOVED IN THIS APPLICATION Figure 7-9 WIRING DIAGRAM - - Electronic Partlow Temperature Recorder T-285 7-14...
  • Page 119 INDEX Evacuation, 6-3 Evaporator, 6-14 Air Cooled Condenser Section, 2-4 Evaporator Fan, 1-3, 3-4, 6-15 Alarm, 3-6, 3-10, 3-11, 3-18, 3-27 Evaporator Section, 2-2 Arctic Mode, 3-4 Expansion Valve, 6-12 Autotransformer, 6-18 Failure Action, 3-4 Bulb Mode, 3-5 Filter--Drier, 6-12 Fresh Air Makeup, 2-1, 4-1 Frozen Mode, 4-7 Frozen Mode -- Conventional, 3-6...
  • Page 120 INDEX Safety and Protective Devices, 2-9 Manifold Gauge Set, 6-1 Sampling Type, 3-10 Microporcessor System, 3-1 Sensor Configuration, 3-8 Modes Of Operation, 3-3 Sequence Of operation, 4-6 Motor Current, 6-35 Service Valves, 6-1 Starting, 4-3 Stopping, 4-3 Suction Modulating Valve, 6-16 Oil Level , 6-9 Operational Software, 3-3, 3-7 Temperature Control, 3-4, 3-5...
  • Page 121 Carrier Transicold Division, Carrier Corporation Container Products Group P.O. Box 4805 Syracuse, N.Y. 13221 U.S A www.carrier.transicold.com A member of the United Technologies Corporation family. Stock symbol UTX ã2004 Carrier Corporation D Printed in U. S. A. 03/04...

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69nt40-511-31069nt40-511-34469nt40-511-35969nt40-511-399

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