Safety when servicing
98 Handling hazardous substances
Fluorocarbon rubber which has been heated
When handling a machine which has been damaged by fire or
been exposed to other intense heat, the following protective
steps must under all circumstances be taken:
Q Use thick, gloves made of rubber and wear protective goggles.
Q Discard gloves, rags etc. that been in contact with heated
fluorocarbon rubber after having first washed them in lime
water (a solution by calcium hydroxide, i.e. slaked lime in
water).
Q The area around a part that has been very hot and which may
be made of fluorocarbon rubber must be decontaminated
through thorough and ample washing with lime water.
Q As a precautionary measure all seals (O-rings and other oil
seals) must be handled as if they were made from fluorocarbon
rubber.
Q The hydrofluoric acid may remain on the machine parts for
several years after a fire.
Q If swelling, redness or a burning sensation occurs and one
suspects that the cause may be contact with heated
fluorocarbon rubber contact a medical doctor immediately.
Symptoms may not appear until after several hours without any
previous warning.
Q The acid cannot be rinsed or washed away from the skin. In
stead treat with Hydrofluoric Acid Burn Jelly or similar before
contacting a doctor.
Refrigerant
NOTE! All types of service of the air conditioning unit must be
carried out at accredited workshops by, or under the
supervision of, a person in a position of authority with
certified competence.
The air-conditioning unit of the machine is filled with refrigerant
R134a at the factory. R134a has no damaging effect on the ozone
layer of the atmosphere, however, it contributes to the greenhouse
effect and must therefore never purposely be released into the
open air.
IMPORTANT! R134a must never be mixed with any other kind
of refrigerant, e.g. R12, as this will cause the unit to fail.
WARNING!
Certain seals, which are intended to withstand high
operating temperatures, e.g. in engines, control valves,
hydraulic motors and pumps, may be made from
fluorocarbon rubber. When heated to high temperatures,
fluorocarbon rubber decomposes to hydrogen fluoride and
hydrofluoric acid, which is very corrosive to skin and
respiratory tracts.
WARNING!
The refrigerant R134a easily causes frostbites, when it
comes into contact with bare skin. When heated gases are
formed and these may be harmful to lungs and the nervous
system.
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