Carrier 69NT40-561-201, Operation & Service Manual

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T − 364 Safety − 1
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices supplement
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. 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 unat-
tended. Always obtain first aid or medical attention im-
mediately.
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.
In case of severe vibration or unusual noise, 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, dis-
connecting 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 pre-
vent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridg-
ing an overload, or using any sort of jumper wires. Prob-
lems with the system should be diagnosed, and any
necessary repairs performed by qualified service per-
sonnel.
When performing any arc welding on the unit or contain-
er, disconnect all wire harness connectors from the
modules 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 extin-
guish with CO
2
(never use water).
SPECIFIC WARNING AND CAUTION 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 re-
sult in severe personal injury or death.
WARNING - means to warn against hazards or unsafe
conditions that COULD result in severe personal injury
or death.
CAUTION - means to warn against potential hazard or
unsafe practice that could result in personal injury, prod-
uct or property damage.
The statements listed below are applicable to the refrig-
eration unit and appear elsewhere in this manual. These
recommended precautions must be understood and ap-
plied during operation and maintenance of the equip-
ment covered herein.
WARNING
EXPLOSION HAZARD: Failure to follow this
WARNING can result in death, serious
personal injury and / or property damage.
Never use air or gas mixtures containing
oxygen (O
2
) for leak testing or operating the
product.
Charge Only With R
− 134a: Refrigerant must
conform to AHRI Standard 700
specification.
WARNING
Beware of unannounced starting of the
evaporator and condenser fans. The unit
may cycle the fans and compressor unex-
pectedly as control requirements dictate.
WARNING
Do not attempt to remove power plug(s) be-
fore turning OFF start-stop switch (ST), unit
circuit breaker(s) and external power
source.
WARNING
Make sure the power plugs are clean and
dry before connecting to power receptacle.
WARNING
Make sure that the unit circuit breaker
(CB-1) and the START-STOP switch (ST) are
in the “O” (OFF) position before connecting
to any electrical power source.