1–3 62-11640
WARNING
!
When performing service or maintenance
procedures: ensure any two way commu-
nication is disabled in accordance with
the manufacturer’s instruction, ensure
the START/RUN−OFF switch is in OFF
position and, whenever practical, discon-
nect the negative battery connection.
WARNING
!
Do not remove the cap from a hot coolant
system; if the cap must be removed, do
so very slowly in order to release the
pressure without spray.
WARNING
!
Caution and good electrical practices
must be used when working around and
with high voltage circuits.
WARNING
!
Beware of moving poly V-belt.
WARNING
!
When working with belts, beware of
pinch points.
WARNING
!
Only a refrigerant cylinder that has previ-
ously been used with R404A should be
connected to this refrigeration unit.
WARNING
!
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to
explosion.
WARNING
!
Disconnect batteries before doing any
electrical welding on unit or chassis to
which unit is attached (trailer, container,
rail car, metal building, etc).
WARNING
!
Inspect battery cables for signs of wear,
abrasion or damage at every pre−trip
inspection and replace if necessary. Also
check battery cable routing to ensure
that clamps are secure and that cables
are not pinched or chafing against an
components.
WARNING
!
Use the required protective eye wear and
clothing when working with solvents.
WARNING
!
Only a refrigerant cylinder containing
R404A should be connected to this refrig-
eration unit in order to pressurize the sys-
tem. However, dry nitrogen may be used to
increase pressure. Any other gas or vapor
will contaminate the system and require
additional removal and evacuation.
WARNING
!
Do not use a nitrogen cylinder without a
pressure regulator. Cylinder pressure is
approximately 2350 psig (159.9 bar). Do
not use oxygen in or near a refrigerant
system as an explosion may occur. (See
Figure 8.27)
WARNING
!
Before removal of the compressor, relieve
the internal pressure by very carefully
loosening the couplings to break the seal.
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