Thermo King T-500R Maintenance Manual page 10

BATTERY REMOVAL
DANGER: Disconnect the negative battery terminal (-) first when removing a battery. Connect the
positive terminal (+) first when installing a battery.
This order is important because the frame is grounded to the negative battery terminal. If the negative
terminal is still connected, a complete circuit exists from the positive terminal of the battery to the frame.
Metal objects contacting the positive side and the frame simultaneously will cause sparks or arcing. If
there are sufficient hydrogen gases emitted from the battery, an explosion might occur, causing equipment
damage, serious injury, even death.
REFRIGERANT
General Information
When removing refrigerant from a unit, a recovery process that prevents or minimises refrigerant loss to the atmosphere is
required by law.
Do not use oxygen (O
2
Do not use a Halide torch. When a flame comes in contact with refrigerant, toxic gases are produced. These gases can cause
suffocation, even death.
When a refrigerant is exposed to the atmosphere in the liquid state, it evaporates rapidly, freezing anything it contacts. If
refrigerant contacts the skin, severe frostbite can result.
First Aid
In the event of frost bite, the objectives of First Aid are to protect the frozen area from additional injury, to warm the affected
area rapidly, and to maintain respiration.
• EYES: For contact with liquid, immediately flush eyes with large amounts of water and get prompt medical attention.
• SKIN: Flush area with large amounts of lukewarm (not hot) water. Do not apply heat. Remove contaminated clothing and
shoes. Wrap burns with dry, sterile, bulky dressing to protect from infection/injury. Get medical attention. Wash contaminated
clothing before reuse.
• INHALATION: Move victim to fresh air and use cardiopulmonary resuscitation or mouth-to-mouth ventilation if necessary.
Stay with victim until arrival of emergency medical personnel.
REFRIGERANT OIL
General Information
Observe the following precautions when working with or around synthetic or polyol ester refrigerant oil:
• Do not allow refrigerant oil to contact your eyes.
• Do not mix refrigerant oils because that can cause system damage.
• Do not allow prolonged or repeated contact with skin or clothing.
• To prevent irritation, you should wash thoroughly immediately after handling refrigerant oil. Rubber gloves are recommended
when handling polyol ester oil.
First Aid
• EYES: Immediately flush eyes with large amounts of water for at least 15 minutes while holding the eyelids open. Get prompt
medical attention.
• SKIN: Remove contaminated clothing. Wash thoroughly with soap and water. Get medical attention if irritation persists.
• INHALATION: Move victim to fresh air and restore breathing necessary. Stay with victim until arrival of emergency
personnel.
• INGESTION: Do not induce vomiting. Contact a local poison control center or physician immediately.
) or compressed air for leak testing. Oxygen mixed with refrigerant is combustible.
Safety Precautions 2-2