Carrier 69NT40-489-100 Series, Operation And Service Manual

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T-305 Safety--7
SPECIFIC DANGER, WARNING AND CAUTION STATEMENTS
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
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 any power recep-
tacle.
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 de-
termined that pressurized, mixtures of re-
frigerant and air can undergo combustion
when exposed to an ignition source.
WARNING
Make sure power to the unit is OFF and
power plug disconnected before replacing
the compressor.
WARNING
Before disassembly of any external com-
pressor component make sure to relieve
possible internal pressure by loosening the
bolts and tapping the component with a
soft hammer to break the seal.
WARNING
Do not use a nitrogen cylinder without a
pressure regulator. Do not use oxygen in or
near a refrigeration system as an explosion
may occur.
WARNING
Do not open the condenser fan grille before
turning power OFF and disconnecting
power plug.
WARNING
Oakite No. 32 is an acid. Be sure that the
acid is slowly added to the water. DO NOT
PUT WATER INTO THE ACID -- this will
cause spattering and excessive heat.
WARNING
Wear rubber gloves and wash the solution
from the skin immediately if accidental con-
tact occurs. Do not allow the solution to
splash onto concrete.
WARNING
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main power
supply before working on moving parts.