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Container Refrigeration Unit

Models 69NT40-511-1 to 69NT40-511-199 and 69NT40-521
DUE TO THE LARGE NUMBER OF SCHEMATIC DIAGRAMS CONTAINED IN THIS BOOK, THE BOOK IS PRESENTED AS TWO FILES. REFER TO FILE T268-DIAGRAMS FOR THE CHAPTER 7 ELECTRICAL DIAGRAMS AND SCHEMATICS

T-268 Rev G

OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT

MODELS 69NT40-511-1 to 69NT40-511-199 and69NT40-521

Carrier Transicold Division, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221 E Carrier Corporation 1999 S Printed in U. S. A. 0499

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 maintenanceof the equipment covered herein. The general safety notices are presented in the following three sections labeled: First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions appearing elsewhere in the manual follows the general safety notices.
FIRST AID

An injury, no matter how slight, should never go unattended. Always obtain first aid ormedical attention immediately.
OPERATING PRECAUTIONS

Always wear safety glasses. Keep hands, clothing and tools clear of the evaporator and condenser fans. No work should be performed on the unit until all circuit breakers and start-stop switches are turned off, and power supply is disconnected. Always work in pairs. Never work on the equipment alone. In case of severe vibration or unusualnoise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS

Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or evaporator access panels before turning power off, and disconnecting and securing the power plug. Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches. Tag circuitbreaker and power supply to prevent accidental energizing of circuit. Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems with the system should be diagnosed, and any necessary repairs performed, by qualified service personnel. When performing any arc welding on the unit or container, disconnect all wire harness connectors from themodules in the control box. Do not remove wire harness from the modules unless you are grounded to the unit frame with a static-safe wrist strap. In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).

Safety-1

T-268-07

SAFETY SUMMARY

SAFETY SUMMARY

SPECIFIC WARNING AND CAUTION STATEMENTS

To help identify the label hazards on the Unit and explain thelevel 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. CAUTION - means to warn against potential hazard or unsafe practice which COULD result in minorpersonal injury, product or property damage. The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These recommended precautions must be understood and applied during operation and maintenance of the equipment covered herein. WARNING When servicing the unit, use caution when handling R-134a. The refrigerant when in contact with high temperatures(about 1000_F) will decompose into highly corrosive and toxic compounds. WARNING Be sure to avoid refrigerant coming in contact with the eyes. Should refrigerant come in contact with the eyes, wash eyes for a minimum of 15 minutes with potable water only. THE USE OF MINERAL OIL OR REFRIGERANT OILS IS NOT RECOMMENDED. WARNING Be sure to avoid refrigerant coming in contact with the skin. Should...
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