Carrier 69NT40-561-300, Operation And Service Manual

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1–1 T-365
SECTION 1
SAFETY SUMMARY
1.1 GENERAL SAFETY NOTICES
Installation and servicing of refrigeration equipment can be hazardous due to system pressures and electrical com-
ponents. Only trained and qualified service personnel should install, repair, or service refrigeration equipment.
When working on refrigeration equipment, observe all potential Danger, Warning and Caution hazards, including
those shown below and on hazard labels attached to the unit.
The following general safety notices supplement specific warnings and cautions appearing elsewhere in this man-
ual. 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. A listing of the specific warnings and cautions
appearing elsewhere in the manual follows the general safety notices.
1.2 FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.
1.3 OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
Wear appropriate personal protective equipment for the work being undertaken.
No work should be performed on the unit until all circuit breakers and start-stop switches are turned off, and power
supply is disconnected.
In case of severe vibration or unusual noise, stop the unit and investigate.
1.4 MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not remove the condenser fan grille or
evaporator access panels before turning power off, disconnecting and securing the power plug.
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches.
Tag circuit breaker 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 the mod-
ules in control boxes. 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 CO
2
(never use water).
1.5 SPECIFIC HAZARD 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 that WILL result in severe personal injury or death.
WARNING
!
Means to warn against hazards or unsafe conditions that COULD result in severe personal
injury or death.