Carrier 69NT40-511-310 Operation & Service Manual
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Carrier 69NT40-511-310 Operation & Service Manual

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  • Page 1 Carrier Transicold Container Refrigeration Models 69NT40-511-310, 344 & 359 Operation & Service T-296 Rev A Downloaded from ManualsNet.com search engine...
  • Page 2 Models 69NT40- -511- -310, 344 & 359 Carrier Transicold Division, A member of the United Technologies Corporation family. Stock symbol UTX. Carrier Transicold, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221 U. S. A. ã 2003 Carrier Corporation D Printed in U. S. A. 0903 Downloaded from ManualsNet.com...
  • 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 SPECIFIC WARNING AND CAUTION STATEMENTS - - Continued CAUTION Pre-trip inspection should not be performed with critical temperature cargoes in the container. CAUTION When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the comple- tion of Pre-Trip activity, dehumidification and bulb mode must be reactivated. CAUTION When condenser water flow is below 11 lpm (3 gpm) or when water-cooled operation is not in use, the CFS switch MUST be set to position ”1”...
  • Page 6 SPECIFIC WARNING AND CAUTION STATEMENTS - - Continued 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 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 3.6.4 Logging Interval (dCF03) ............3-10 3.6.5 Thermistor Format (dCF04) .
  • Page 10 TABLE OF CONTENTS - - Continued PARAGRAPH NUMBER Page UNIT WILL NOT TERMINATE HEATING ..........UNIT WILL NOT DEFROST PROPERLY .
  • Page 11 TABLE OF CONTENTS - - Continued PARAGRAPH NUMBER Page 6.15 EVAPORATOR COIL AND HEATER ASSEMBLY ......... 6-15 6.15.1 Evaporator Coil 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 6-22. Thermostatic Expansion Valve -- Alco ..........6-14 Figure 6-23.
  • Page 14 1.3.9 Communications. Identification Matrix manual, publication T--300. Printed The unit may be fitted with a communications interface copies of the T--300 may be obtained from Carrier module. The communications interface module is a Transicold. Also, a continuously updated copy may be...
  • Page 15 1.3.16 Thermometer Port 1.3.26 Humidification The unit may be fitted with ports in the front of the frame The unit may be equipped with the Carrier Transicold for insertion of a thermometer to measure supply and/or NatureFresh humidity management system. The return air temperature.
  • Page 16 1.3.28 Evaporator The following Part numbers cover ALL previous MicroLink 2 and 2i controllers: Evaporator section options include a semi--hermetic thermal expansion valve, a hermetic thermal expansion Part Number valve and two sizes of heat exchangers. The unit may Model Model Description have 4 or 6 heaters.

  • Page 17: Description

    SECTION 2 DESCRIPTION 2.1 GENERAL DESCRIPTION access to the thermostatic expansion valve and 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...

  • Page 18: Evaporator Section

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

  • Page 19: 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 20: 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 21: 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 22: 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 23: 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 24: 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 25: Safety And Protective Devices

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

  • Page 26: 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 27: Figure 2-7 Refrigeration Circuit Schematic

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

  • Page 28: Arctic Option

    2.6 ARCTIC OPTION line is attached to the drain pan, and prevents water from freezing in the line.In addition, there is a crankcase The arctic option consists of the arctic drain line, which heater (CCH) installed onto the compressor, which incorporates the drain hose heater (DHH), drain hose warms the refrigerant oil and evaporate any liquid fuse (FDH), hose heater thermostat (HHT), and the...

  • 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 The key pad and display module serve to provide user...

  • 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

    assignments. The action taken by the Operational on the ambient temperature. As the ambient Software will change if any one of the inputs changes. temperature increases, the amount of time that the Overall interaction of the inputs is described as a “mode” condenser fan is energized will correspondingly of operation.

  • Page 33: Perishable Mode -- Economy

    3.3.9 Perishable Mode - - Economy If the mode is terminated by a condition other than the humidity sensor, e.g., an out-of-range or compressor The economy mode is an extension of the conventional shutdown condition, the heat relay is de-energized mode and is applicable to units with two speed immediately.

  • Page 34: Frozen Mode -- Conventional

    When in the frozen mode the controller maintains the 3.4 CONTROLLER ALARMS return air temperature at set point, the RETURN Alarm display is an independent controller software indicator light will be illuminated on the display module function. If an operating parameter is outside of and the default reading on the display window will be the expected range or a components does not return the return air probe reading.

  • Page 35: Datacorder

    (see desired code number. The right window will display Figure 3- 1) which may be used with the Carrier the value of this item for five seconds before returning Transicold Data Reader to down load data. A personal to the normal display mode.

  • Page 36: Sensor Configuration (Dcf02)

    (dCF02=64) 1 humidity input configuration to generic and selecting which data points 1 cargo probe (thermistor input) to record may be done using the Carrier Transicold Data Retrieval Program. 2 thermistor inputs(supply & return) 1. Control mode 3 USDA thermistor inputs 10 sensors 2.

  • 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 a probe alarm is configured to ON, then the associated a. DataReader alarm is always enabled. The Carrier Transicold Data Reader (see Figure 3- 6) is a simple to operate hand held device designed to extract If the probes are configured to AUTO, they act as a data from the DataCORDER and then upload it to a group.

  • Page 39: Usda Cold Treatment

    20 foot containers. This probe should be In response to the demand to replace fumigation with placed in a carton at a side wall at one- this environmentally sound process, Carrier has half the height of the load. integrated Cold...

  • Page 40: Datacorder Alarms

    1. Fill in ISO header information b. To scroll to the end of the alarm list press the UP AR- ROW. Depressing the DOWN ARROW key will scroll 2. Add a trip comment if desired the list backward. c. The left display will show “AL#” where # is the alarms 3.

  • Page 41: Table 3-4 Controller Configuration Variables

    Table 3-4 Controller Configuration Variables CONFIGURATION TITLE DEFAULT OPTION NUMBER CnF01 Bypass Valve Enable CnF02 Evaporator Fan Speed dS (Dual) SS (Single) CnF03 Control Sensors FOUr duAL CnF04 Dehumidification Mode CnF05 Reserved for future use ---------- CnF06 Condenser Fan Speed Select OFF (Single) On (Variable) CnF07...

  • 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- up, thus allowing multiple units to stagger their control initiation when all units are Cd31 Stagger Start Offset 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 for units configured for four probes. If the unit is configured with a DataCORDER, Cd38 Secondary Supply Cd38 will display “-- -- -- -- -- .”...

  • Page 46: Table 3-6 Controller Alarm Indications (Sheet 1 Of 3)

    Table 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)

    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)

    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)

    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 operation on nominal 230 volt power. It is fitted with a WARNING 230 vac cable and a receptacle to accept the standard Beware of unannounced starting of the 460 vac power plug.

  • Page 57: Connect Water-Cooled Condenser

    a. Connect the water supply line to the inlet side of con- 50HZ FLOW denser and the discharge line to the outlet side of the T-BAR (CMH) 1-!/2” condenser. (See Figure 2-5.) b. Maintain a flow rate of 11 to 26 lpm (3 to 7 gpm). T-BAR c.

  • Page 58: Complete Inspection

    Partlow Recorders scroll down to select any of the individual tests. The contents of the menus are as follows: a. Open recorder door and wind mechanical clock or PRE-TRIP SELECTION MENU check battery of electronic recorder. Be sure key is re- turned to storage clip of mechanical recorder.

  • Page 59: Observe Unit Operation

    ber to the left. The user may then press the DOWN normally closed auxiliary contacts on the compressor ARROW to repeat the test, the UP ARROW to skip to contactor. the next test or the PRE--TRIP key to terminate test- 4.9.2 Probe Check ing.

  • Page 60: Figure 4-3 Controller Operation -- Perishable Mode

    FALLING RISING TEMPERATURE TEMPERATURE +2.5 C (4.5 +1.5 C (2.7 MODULATING MODULATING C (1.8 COOLING COOLING +0.5 C (0.9 +.20 SET POINT AIR CIRCULATION - -0.20 AIR CIRCULATION - - 0.5 C (0.9 - -1 C (1.8 HEATING HEATING - -1.5 C (2.7 Figure 4-3 Controller Operation - - Perishable Mode FALLING...

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

    f. The evaporator fan motors continue to run to circulate ENERGIZED DE- -ENERGIZED air throughout the container. The in-range light re- CONTROL TRANSFORMER FOR FULL DIAGRAM AND mains illuminated as long as the supply air is within LEGEND, SEE SECTION 7 tolerance of set point.

  • Page 62: Sequence Of Operation -- Defrost

    2. In temperature ambients 3. The defrost interval timer (controller function code Cd27) reaches the defrost interval set by the user. condenser fan will be cycled by the controller to maintain proper condensing 4. The controller probe diagnostic logic determines that pressure.
  • Page 63 enter defrost if the Defrost Temperature Sensor is at or 4.11 Arctic Mode below 25.6°C(78°F). Defrost will terminate when the With arctic mode enabled, if the ambient is colder than Defrost Sensor Temperature reading rises above the --10.0_C there is a 30 minute time delay at startup for CnF41 setting.

  • Page 64: Troubleshooting

    SECTION 5 TROUBLESHOOTING REMEDY/ CONDITION POSSIBLE CAUSE REFERENCE 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 65: Unit Runs But Has Insufficient Cooling

    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 66: Abnormal Pressures (Cooling)

    REMEDY/ CONDITION POSSIBLE CAUSE REFERENCE SECTION 5.6 UNIT WILL NOT DEFROST PROPERLY - -Continued Frequent defrost Wet load Normal 5.7 ABNORMAL PRESSURES (COOLING) Condenser coil dirty 6.10 Condenser fan rotating backwards 6.11 Condenser fan inoperative 6.11 Refrigerant overcharge or noncondensibles 6.7.1 High discharge pressure High discharge pressure...

  • Page 67: Evaporator Air Flow Or Restricted Air Flow

    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 68: Service

    (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 69: Pumping The Unit Down

    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 70: Refrigerant Leak Checking

    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 71: Procedure - Partial System

    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 72: Compressor

    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 73: Figure 6-7 Exploded View Of Valve Plate

    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 stator in the field is not recommended. The rotor and stator are a matched pair and should not be separated.

  • Page 74: 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 75: Preparation

    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 76: Installing The Components

    Push pistons from the inside of the crankcase through CAUTION the cylinders, being careful not to break the rings. Use only Carrier Transicold approved Place rods so that the chamfered side will be against Polyol Ester Oil (POE) - - Castrol-Icematic radius of crankpins.

  • Page 77: High Pressure Switch

    1 If the oil level is above one-eighth sight glass, oil e. Close valve on cylinder and open bleed-off valve. must be removed from the compressor. f. Open cylinder valve. Slowly close bleed-off valve to 2 Close (frontseat) suction service valve and pump increase pressure on switch.

  • Page 78: Water Cooled Condenser Cleaning

    ¦1/16”) back from edge of the venturi. Spin fan by NOTE hand to check clearance. When Oakite compound No. 32 is being used for the first time, the local Oakite Technical Ser- e. Close and secure condenser fan screen guard. vice representative should be called in for their suggestions in planning the procedure.

  • Page 79: Filter-Drier

    tact occurs. Do not allow the solution to 11 Put the unit back in service and operate under nor- mal load. Check the head pressure. If normal, a thor- splash onto concrete. ough de-scaling has been achieved. What You Can Do For Further Help: 5.

  • Page 80: Checking Superheat

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

  • Page 81: Semi--Hermetic Valve Replacement

    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 82: Evaporator Coil And Heater 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 83: Evaporator Fan Motor Capacitors

    a. Assemble the motor and plastic spacer onto the sta- 6.17.2 Removing The Capacitor tor. WARNING Make sure power to the unit is OFF and b. Apply loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds). power plug disconnected before removing capacitor(s).

  • Page 84: Precheck Procedure

    Checking with SMA-12 portable stepper drive tester start responding to the control logic and open or The SMA-12 portable stepper drive tester (Carrier close, relative to the demand. Scrutinize the unit op- Transicold P/N 07-00375-00) is a battery operated eration for a few minutes.

  • Page 85: Checking The Drive Module

    “C” and “D” can be checked as follows: ance are good, check the drive module. (Refer to step 6.18.3) 1. Install a jumper assembly (Carrier part number 07--00408--00) to connect the drive module and con- 5. If the valve is determined as faulty after completing troller connectors as shown in Figure Figure 6-25.

  • Page 86: Autotransformer

    (WP) contact is open or closed. TP 4 a. Obtain a grounding wrist strap (Carrier Transicold part number 07--00--304--00)and a static dissipation This test point enables the user to check if the internal mat (Carrier Transicold part number 07--00304--00.

  • Page 87: Controller Programming Procedure

    TP 9 4. The Display module will show “511” on the left LCD display and “###” on the right . The “###” will be the This test point is the chassis (unit frame) ground dash number for a given unit model number, use the connection.

  • Page 88: Sensor Replacement

    mixture reaches 0_C (32_F) measured on a labora- wire sensors the black wire should be cut at the tory thermometer. middle length and the red/white wire cut to the shorter length. (See Figure 6-27.) b. Start unit and check sensor reading on the control panel.

  • Page 89: Sensor Re--Installation

    k. Heat tubing to shrink over splice. Make sure all seams c. Sensor DTS are sealed tightly against the wiring to prevent mois- The DTS sensor must have insulating material placed ture seepage. completely over the sensor to insure the coil metal temperature is sensed.
  • Page 90 If the power has been OFF for more than three days, the 6.22.1Replacing the Recorder recorder will NOT re--synchronize (the chart will not a. Turn power to the unit OFF. advance to present time), the pen tip will move to the b.

  • Page 91: 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 6.22.3Adjusting the Recorder Stylus Electronic Partlow Recorder 12-00464-00:...

  • Page 92: Checking The Temperature Recorder

    NOTE platen of the recorder. If a thermistor is provided, the recorder chart reading may be checked using a Use chart CTD P/N 09-00128-00 (°F) temperature tester as described in step a . If a P/N 09-00128-01 (°C). thermistor is not fitted, check the recorder chart reading using an ice and water bath as described in step b.
  • Page 93 a. Check With Temperature Tester thermometer reading and the stylus indicated tem- perature. The bulb mounted thermistor may be read using a If the difference noted between the known element Simpson Meter, CTC P/N 07-00013 or Robinair temperature and indicated temperature is within Thermistor Temperature Tester, Model 12860 by acceptable limits (+/-- 0.3 of 0°C = 1/2°...

  • Page 94: Saginomiya 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 6.24 SAGINOMIYA TEMPERATURE RECORDER a. Install new chart on platen. b.

  • Page 95: 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 6.24.3Replacing Sensor Probe silicone before securing to case. a. Remove box from unit. d.

  • Page 96: Maintenance Of Painted Surfaces

    6.26 COMPOSITE CONTROL BOX REPAIRS become stripped, or if the insert becomes loose. The inserts and epoxy are contained in repair kit, Carrier 6.26.1 Introduction Transicold part number 76-50084-00 (see Table 6-4).

  • Page 97: 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 98: Figure 6-35. Insert Location

    Figure 6-35. Insert Location 6-31 T-296 Downloaded from ManualsNet.com search engine...

  • Page 99: Figure 6-36. Communications Interface Installation

    6.27 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 100: 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 101: Table 6-8 Compressor Torque Values

    Table 6-8 Compressor Torque Values TORQUE RANGE TORQUE RANGE SIZE USAGE USAGE DIAMETER THREADS ft lb ft-lb (inches) PER INCH 1/16 27 (pipe) 8 -- 12 1.11 -- 1.66 Pipe Plug -- Crankshaft 20 (pipe) 6 -- 10 0.83 -- 1.38 Oil Return Check Valve -- Crankcase 20 (pipe) 20 -- 25...

  • 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 - -2 (- -.14) (- -.28) - -4 (- -.41) - -6 (15.6) (21.1) (26.7) (32.2) (37.8) (43.3) (48.9) (_C) 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: Electrical Wiring Schematic

    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 PID numbers: NT0435, NT0566 and NT0669 Figure 7-3 Provides the wiring diagram for units with PID numbers: NT0435, NT0566 and NT0669 Figure 7-4 Provides the schematic diagram for units with PID Number 0712 Figure 7-5 Provides the wiring diagram for units with PID Number 0712...

  • Page 106: Figure 7-2 Schematic Diagram -- Units With Pid Numbers: Nt0435, Nt0566 And Nt0669

    Figure 7-2 SCHEMATIC DIAGRAM - - Units with PID numbers: NT0435, NT0566 and NT0669 T-296 Downloaded from ManualsNet.com search engine...

  • Page 107: Figure 7-3 Wiring Diagram --Units With Pid Numbers: Nt0435, Nt0566 And Nt0669

    Figure 7-3 WIRING DIAGRAM - -Units with PID numbers: NT0435, NT0566 and NT0669 T-296 Downloaded from ManualsNet.com search engine...
  • Page 108 Figure 7- -3 WIRING DIAGRAM - - Units with PID numbers: NT0435, NT0566 and NT0669 (continued) T-296 Downloaded from ManualsNet.com search engine...

  • Page 109: Figure 7-4 Schematic Diagram -- Units With Pid Number 0712

    Figure 7-4 SCHEMATIC DIAGRAM - - Units with PID Number 0712 T-296 Downloaded from ManualsNet.com search engine...

  • Page 110: Figure 7--5 Wiring Diagram -- Units With Pid Number 0712

    Figure 7-5 WIRING DIAGRAM - - Units with PID Number 0712 T-296 Downloaded from ManualsNet.com search engine...
  • Page 111 FIGURE 7- -5 WIRING DIAGRAM - - Units with PID Number 0712 (continued) T-296 Downloaded from ManualsNet.com search engine...
  • Page 112 Figure 7-6 SCHEMATIC - - Units with PID Number 0881 T-296 Downloaded from ManualsNet.com search engine...

  • Page 113: Figure 7-7 Wiring Diagram -- Units With Pid Number 0881

    Figure 7-7 WIRING DIAGRAM - - Units with PID Number 0881 T-296 Downloaded from ManualsNet.com search engine...
  • Page 114 FIGURE 7- -7 WIRING DIAGRAM - - Units with PID Number 0881 (continued) T-296 7-10 Downloaded from ManualsNet.com search engine...
  • Page 115 INDEX Evaporator, 6-15 Evaporator Fan, 1-3, 3-4, 6-15 Air Cooled Condenser Section, 2-4 Evaporator Section, 2-2 Alarm, 3-6, 3-10, 3-12, 3-18, 3-27 Expansion Valve, 6-12 Arctic Drain Line, 2-12 Arctic Mode, 3-4 Autotransformer, 6-19 Failure Action, 3-4 Filter--Drier, 6-12 Fresh Air Makeup, 2-1, 4-1 Bulb Mode, 3-5 Frozen Mode, 4-6 Frozen Mode -- Conventional, 3-6...
  • Page 116 INDEX - - Continued 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, 6-36 Service Valves, 6-1 Starting, 4-2 Stopping, 4-2 Suction Modulating Valve, 6-16 Oil Level , 6-9 Switch, High Pressure, 2-7...

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