Air Conditioning Safety

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Air Conditioning Safety
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Loss of Ozone on Human Health

• Loss of Ozone allows Ultra violet rays to reach
  earth
• Affects our skin, eyes and immune system
• Increases chances of skin cancer
• Increases risk of cataracts
• Reduces ability of immune system to reject
  cancers

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Personal Safety

• Wear safety glasses, goggles or face shield (R-12
  can cause blindness)
• Burns from a engine that has not cooled off
• Adequate Ventilation
• Make sure car is in Park and ventilated
• Caution around moving parts
• Can cause frostbite on bare skin

4
High Pressure

• Containers and hoses must not leak
• Containers must be able to hold high pressure
  without splitting or bursting
• Pressures change with changes in temperatures
• Pressures change with compressor or pumps

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High Pressure Containers

• Must not overheat the pressure vessel
• Must not overfill the pressure vessel
• Pressure containers are usually designed with
  some elasticity.
• Containers are made with fusible plugs or relief
  valves

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Hydrostatic Pressure

• The Expansion of liquid while undergoing a
  temperature change.
• For example If you overfill a vessel at a lower
  temperature then subject it to a higher
  temperature, the liquid will expand and if you
  overfilled the vessel there will be no room for
  the liquid to expand and the vessel will explode!

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Refrigerant Cylinders

• Refrigerant Cylinders are designed to withstand a
  maximum temperature of 130 degree Fahrenheit
• To Prevent overfilling, never fill a container
  more than 60 percent of its gross weight. (ex 18
  LB in a 30 LB container or 30 lbs in a 50 LB
  container)

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Precautions

• Do not put flame near containers
• Do not steam clean container that has refrigerant
  in it.
• Be careful of contamination
• Always monitor both sides of system with gauge
  set (high and low side)
• Before loosening fittings or bolts, etc. make
  sure pressure is relieved

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More Precautions

• Use pressure relief valves on containers if
  subject to high temperatures
• Do not allow compressor to pump liquid or be
  sluged oil
• Keep your mind on the job
• Be vigilant

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TOXIC GASES

• TOXIC POISONOUS
• REFRIGERANTS VARY IN TOXICITY
• R-12 IS HARMLESS WITH AIR
• THE DANGER DEPENDS ON
• THE NATURE OF THE GAS ITSELF
• ITS CONCENTRATION IN AIR
• HOW LONG A TIME IT IS BREATHED

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DECOMPOSITION OF GASES

• GASES IN THEIR NATURAL STATE MAY BE HARMLESS
• MIXED WITH OTHER GASES THESE GASES BECOME TOXIC
• WITH HEAT APPLIED TO THEM, THEY CAN BECOME TOXIC

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PRECAUTIONS RELATING TO GASES

• DO NOT BREATHE IF NOT NECESSARY
• DO NOT IGNORE JUST BECAUSE NO ODOR
• DO NOT DISCHARGE GAS (AT ALL)
• DO NOT DISCHARGE HALOCARBON GAS IN ROOM THAT HAS
  A FLAME