Carrier 69NT40-561-019, Operation And Service Manual

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T-359 1–2
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.
DANGER
!
Never use air for leak testing. It has been determined that pressurized, mixtures of refrigerant
and air can undergo combustion when exposed to an ignition source.
WARNING
!
Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the
fans and compressor unexpectedly 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(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
!
Make sure power to the unit is OFF and power plug disconnected before replacing the com-
pressor.
WARNING
!
Before disassembly of the compressor, be sure to relieve the internal pressure very carefully
by slightly loosening the couplings 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
!
Always turn OFF the unit circuit breakers (CB-1 & CB-2) and disconnect main power supply
before working on moving parts.