The Carrier Transicold 69NT40-511-310, 344, and 359 units are lightweight aluminum frame container refrigeration units designed to fit as the front wall of a container. These self-contained, all-electric units provide precise temperature control through both cooling and heating systems. They are supplied with a complete charge of R-134a refrigerant and compressor lubricating oil, ready for immediate operation upon installation, and feature forklift pockets for easy handling.
Function Description:
The primary function of these units is to maintain desired cargo temperatures and humidity levels within very close limits. The system automatically selects cooling, holding, or heating modes as required. Key components include an evaporator section, compressor section, air-cooled condenser section, and a control box.
Important Technical Specifications:
- Compressor: Single-speed reciprocating compressor, Model 06DR, 6 cylinders, 41 CFM. Weighs 118 kg (260 lb) dry. Uses Mobil ST32 Polyol Ester Oil (POE) with a charge of 3.6 liters (7.6 U.S. pints). The oil level should be between the bottom and one-eighth level of the sight glass when the compressor is off.
- Refrigerant Charge (R-134a):
- Water-Cooled Condenser: 4.5 kg (9.0 lbs) for 2-row, 4.9 kg (10.75 lbs) for 3-row, 5.2 kg (11.5 lbs) for 4-row.
- Receiver: 3.7 kg (8.3 lbs) for 2-row, 4.0 kg (8.8 lbs) for 3-row, 4.9 kg (10.8 lbs) for 4-row.
- Electrical Data:
- Circuit Breakers: CB-1 trips at 29 amps (460 vac); CB-2 (50 amp) trips at 62.5 amps (230 vac); CB-2 (70 amp) trips at 87.5 amps (230 vac).
- Compressor Motor: Full Load Amps (FLA) 17.6 amps @ 460 vac (with current limiting set at 21 amps).
- Condenser Fan Motor: Full Load Amps 1.3 amps (380 vac/50 hz) / 1.6 amps (460 vac/60 hz). Horsepower 0.43 hp (380 vac/50 hz) / 0.75 hp (460 vac/60 hz). Rotations Per Minute 1425 rpm (380 vac/50 hz) / 1725 rpm (460 vac/60 hz).
- Drain Pan Heaters: Rating 750 watts +5/-10% @ 460 vac. Resistance (cold) 285 ± 7.5% ohms @ 20°C (68°F).
- Evaporator Coil Heaters: Rating 750 watts +5/-10% each @ 230 vac. Resistance (cold) 66.8 to 77.2 ohms @ 20°C (68°F).
- Evaporator Fan Motor(s): High Speed Full Load Amps 1.6 (380 vac/50 hz) / 2.0 (460 vac/60 hz). Low Speed Full Load Amps 0.8 (380 vac/50 hz) / 1.0 (460 vac/60 hz). High Speed Rotations Per Minute 2850 rpm (380 vac/50 hz) / 3450 rpm (460 vac/60 hz). Low Speed Rotations Per Minute 1425 rpm (380 vac/50 hz) / 1750 rpm (460 vac/60 hz).
- Fuses: Control Circuit 10 amps (F3); Controller/DataCORDER 5 amps (F1 & F2); Emergency Defrost 5 amps (FED); Drain Line Heater 5 amps (FDH); Humidity Power Transformer 5 amps (FH).
- Compressor Crankcase Heater: 180 watts @ 460 vac.
- Drain Hose Heater: 80 watts @ 460 vac.
- High Pressure Switch (HPS): Cutout at 25 ± 1.0 kg/cm² (350 ± 10 psig). Cut-in at 18 ± 0.7 kg/cm² (250 ± 10 psig).
- Water Pressure Switch: Cut-in at 0.5 ± 0.2 kg/cm² (7 ± 3 psig). Cutout at 1.6 ± 0.4 kg/cm² (22 ± 5 psig).
- Discharge Pressure Regulator: Factory Setting 32.7 ± 2.5 kg/cm² (72 ± 5.5 psig).
- Humidity Sensor Output Voltage: 0.99 V (30% RH), 1.65 V (50% RH), 2.31 V (70% RH), 2.97 V (90% RH).
- Controller Setpoint Range: -30 to +30°C (-22 to +86°F).
Usage Features:
- Microprocessor Control: Equipped with a Carrier Transicold Micro-Link 2i microprocessor for automatic temperature and humidity control.
- Keypad and Display: User interface for viewing and changing operating parameters, with indicator lights for modes like COOL, DEFROST, and IN RANGE.
- Autotransformer (Optional): Allows operation on nominal 190/230 volt, 3-phase, 50/60 hertz power by stepping up voltage to 380/460 volts.
- Temperature Recorder (Optional): Can be fitted with mechanical (Partlow, Saginomiya) or electronic (Partlow) recorders.
- Dehumidification (Optional): With a humidity sensor, allows setting a humidity set point to reduce internal container moisture.
- Arctic Mode (Optional): Includes a crankcase heater and/or condensate drain line heater for improved operation in cold ambients, preventing freezing and warming compressor oil.
- USDA Cold Treatment: Integrated capability for recording product temperature changes to meet USDA criteria, using remote temperature probes.
- DataCORDER: Software integrated into the controller to log unit operating parameters and cargo temperature data for future retrieval. Data can be downloaded via interrogator receptacles using a DataReader or DataLINE software.
- Remote Monitoring (Optional): Receptacle for connecting remote indicators for COOL, DEFROST, and IN RANGE.
- Communications Interface Module (Optional): Slave module for communication with a master central monitoring station over the main power line.
- Fresh Air Makeup Vent: Adjustable vent for ventilation of commodities requiring fresh air circulation. Must be closed for frozen foods.
Maintenance Features:
- Accessibility: Most components are accessible from the front of the unit, with upper and center access panels for the evaporator section, thermostatic expansion valve, and evaporator coil heaters.
- Safety Devices: Unit components are protected by safety and protective devices such as circuit breakers, fuses, and internal protectors for motors, which shut down the unit or components under unsafe conditions.
- Refrigerant Leak Checking: Recommended procedure uses an R-134a electronic leak detector.
- Evacuation and Dehydration: Detailed procedures for removing moisture from the refrigeration system using a vacuum pump and electronic vacuum gauge.
- Compressor Service: Instructions for removal, replacement, disassembly, and reassembly of the compressor, including checking oil level and replacing components.
- Condenser Coil Cleaning: Procedures for cleaning the air-cooled and water-cooled condenser coils with fresh water, steam, or Oakite compounds to remove rust, scale, and slime.
- Filter-Drier Service: Instructions for checking and replacing the filter-drier.
- Thermostatic Expansion Valve Service: Procedures for checking superheat and replacing hermetic or semi-hermetic expansion valves.
- Evaporator Coil and Heater Assembly Service: Instructions for cleaning and replacing evaporator coils and heaters.
- Evaporator Fan and Motor Assembly Service: Procedures for replacing the evaporator fan and motor assembly, including checking fan rotation and capacitor function.
- Controller Service: Guidelines for handling, troubleshooting, programming, and replacing the controller, including battery replacement.
- Temperature Sensor Service: Procedures for checking and replacing temperature sensors (Return Recorder, Return Temperature, Supply Recorder, Supply Temperature, Ambient, Defrost Temperature, Compressor Discharge, and Compressor Suction).
- Temperature Recorder Service: Instructions for replacing and calibrating electronic and mechanical temperature recorders.
- Composite Control Box Repairs: Procedures for repairing cracks, chips, holes, and hinge inserts in the control box.
- Maintenance of Painted Surfaces: Instructions for cleaning and painting damaged surfaces to prevent corrosion.
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