Precautions For Handling Compressed Gas - Carrier 69NT40-489-100 Series Operation And Service Manual

PRECAUTIONS FOR HANDLING COMPRESSED GAS

Chemical safety goggles or a full face shield shall be used while handling cylinders of compressed gas.
If the unit is being supplied with nitrogen or carbon dioxide, all nonessential persons shall be prohibited from being in or
entering the container space while this procedure is taking place.
Emergency self-contained breathing apparatuses shall be located within the immediate area to permit safe
evacuation in the event of an accident. A high concentration of nitrogen gas will dilute the air (oxygen) in the space.
Breathing this diluted, contaminated air can result in rapid (5 to 10 seconds) loss of consciousness. Therefore, it is
necessary to stop breathing until the self-contained breathing apparatus has been put on and is supplying air.
Emergency rescue procedures shall be established to ensure all personnel can be safely removed from potentially
hazardous exposures.
DANGER
HAZARDOUS ATMOSPHERE INSIDE.
LOW OXYGEN INSIDE CONTAINER CAN
CAUSE DEATH.
Performing service on, or entering a CA
equipped unit can be extremely dangerous.
Refer to the Safety section of this manual
before servicing or entering the container.
DANGER
HAZARDOUS ATMOSPHERE INSIDE OF
THE CONTAINER. LOW OXYGEN LEVEL IN-
SIDE CONTAINER CAN CAUSE DEATH.
THE CONTAINER MUST BE VENTED PRIOR
TO ENTERING.
1. On keypad press VENT and then press
ENTER.
2. Fully open fresh air port, and then press
ENTER on keypad.
breathing of venting gases.
3. Allow refrigeration unit to run. Door
lock will open.
4. Open both rear doors and pull curtain
back. Step away from rear doors.
Continue refrigeration operation for ten
minutes prior to entry or unloading. Do
not close doors. (Wait 45 minutes
before climbing on contents inside
container.)
DANGER
LOW OXYGEN LEVELS INSIDE CONTAIN-
ER. VENTILATE CONTAINER BEFORE EN-
TERING. STAY AWAY FROM DOORS WHILE
VENTING.
DANGER
HAZARDOUS ATMOSPHERE INSIDE. VEN-
TILATE CONTAINER BEFORE ACCESS.
T-305
Avoid direct
Safety--4
DANGER
WHEN OVERRIDING THE CA CONTROLLER,
THE OPERATOR MUST BE AWARE OF THE
IMMEDIATE DANGER OF UNCONSCIOUS-
NESS AND DEATH. THE OPERATOR MUST
READ AND UNDERSTAND ALL WARNING
LABELS AND SAFETY INSTRUCTIONS BE-
FORE PROCEEDING WITH THE EMERGEN-
CY BYPASS PROCEDURE.
WARNING
When servicing the unit, use caution when
handling R-134a. The refrigerant when in
contact with high temperatures (about
1000_F) will decompose into highly corro-
sive and toxic compounds.
WARNING
Be sure ventilation in the workspace is ade-
quate to keep the concentration of refriger-
ant below 1000 parts per million. If neces-
sary, use portable blowers.
WARNING
Beware of rotating fan blades and unan-
nounced starting of fans.
WARNING
Do not use a nitrogen cylinder without a
pressure regulator. Never mix refrigerants
with air for leak testing. It has been deter-
mined that pressurized, air-rich mixtures of
refrigerants and air can undergo combus-
tion when exposed to an ignition source.