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Take all necessary safety precautions in accordance with regulations in force when accessing this refrigeration
unit: use safe ladders, working platforms with appropriate guards.
When the unit is running beware of belts and fans that are moving. When there is a protective structure (fan grid or
guard for example) make sure they are in place. Never remove them when the refrigeration unit is running.
When this refrigeration unit is running in electrical operation, some devices are powered up especially in the elec-
trical control box.
Always use insulated tools relating to maximum voltage and wear individual protecting equipment (EPI) following
Carrier Logout/ Tag-out procedure.
Before servicing this refrigeration unit, make sure the main power switch is in the OFF position.
Ensure this refrigeration unit is disconnected from the local electrical network. Implement Carrier Logout/ Tag-out
procedure (CTE mandatory Fatality Prevention Review: LO/TO and Electricity). Before working in the electrical
control box, it is required to control the absence of tension. Ensure that all capacitors (if any) are discharged before
service to avoid electric shock.
WHEN IT IS NECESSARY TO WORK IN THE ELECTRICAL CONTROL BOX UNDER TENSION, PEOPLE MUST
BE QUALIFIED FOR WORK UNDER LOW OR HIGH VOLTAGE.
When this refrigeration unit is running or even after it has been running, different components can be very cold or
hot (exhaust pipe, tubes, coils, receiver, accumulator or engine for example). Beware when operating near cold or
hot components.
Always use adequate safety gloves when doing any maintenance on this refrigeration unit.
Beware when handling or operating parts that could be sharp (coils, evaporators, clamps for example).
This refrigeration unit may be equipped with a lead-acid type battery. When charging the battery normally, small
amounts of flammable and explosive hydrogen gas are vented.
Projections of acids on the skin or eyes can cause severe burns.
Keep any flame, any lighted object or any source of sparks away from the battery elements.
Always use Personal Protective Equipment when handling and charging battery: safety clothes, safety gloves and
safety glasses.
Respect polarity when connecting a battery.
1.5
REFRIGERANTS
The refrigerant contained in your unit can cause frostbite, severe burns, or blindness when in direct contact with
the skin or eyes. For this reason, and because of legislation regarding the handling of refrigerants during system
service, we recommend that you contact your nearest Carrier Transicold authorized repair facility whenever your
unit requires refrigeration system service.
Combustibility - Certain HFC & HCFC refrigerants can become combustible when mixed with high concentrations
of air at elevated pressures. This is true of R-134a. So, these refrigerants should not be mixed with air under pres-
sure for leak testing or other purposes.
Inhalation Hazards - All refrigerants are hazardous if inhaled in concentrations exceeding the recommended safe
limits. The symptoms include: headaches, nausea, sleepiness, lethargy, dizziness and loss of coordination. It can
result in irregular heartbeat, unconsciousness and even death. The proper remedies should be taken to eliminate
or reduce the exposures.
Flame Enhancement - If you see a change in the color or size of the torch flame while welding or soldering in the
presence of refrigerant vapors, stop work immediately and ventilate the area. This flame effect only occurs at dan-
gerously high concentrations of refrigerant vapors. This could create the inhalation hazards noted above.
Skin & Eye Protection - Contact with “liquid” refrigerants can result in immediate freezing of the tissues, and perma-
nent damage or blindness can result. DO NOT handle liquid refrigerants without proper personal protective equip-
ment. DO NOT cut into any refrigerant lines under pressure. DO NOT open valves or vent equipment where you
may be sprayed with liquid refrigerant.
Always use Personal Protective equipment when handling refrigerant: safety clothes, safety gloves and safety
glasses.
