3
IMPORTANT INFORMATION
Safe Refrigerant Handling
While these items will not cover every concievable
situation, they should serve as a usefull guide.
WARNING
Refrigerants are heavier than air. They can “push out”
the oxygen in your lungs or in any enclosed space. To
avoid possible difficulty in breathing or death:
• Never purge refrigerant into an enclosed room or
space. By law, all refrigerant must be reclaimed.
• If an indoor leak is suspected, thoroughly ventilate
the area before beginning work.
• Liquid refrigerant can be very cold. To avoid
possible frostbite or blindness, avoid contact with
refrigerant and wear gloves and goggles. If liquid
refrigerant does contact your skin or eyes, seek
medical help immediately.
• Always follow EPA regulations. Never burn
refrigerant, as posionous gas will be produced.
WARNING
To avoid possible injury, explosion or death, practice safe
handling of refrigerants.
WARNING
The compressor poe oil for R-410A units is extremely
susceptible to moisture absorption and could cause
compressor failure. Do not leave system open to
atmosphere any longer than necessary for installation.
WARNING
To avoid possible explosion:
• Never apply flame or steam to a refrigerant
cylinder. If you must heat a cylinder for faster
charging, partially immerse it in warm water.
• Never fill a cylinder more than 80% full of liquid
refrigerant.
• Never add anything other than R-22 to an R-22
cylinder or R-410A to an R-410A cylinder. The service
equipment used must be listed or certified for the
type of refrigerant used.
• Store cylinders in a cool, dry place. Never use a
cylinder as a platform or a roller.
WARNING
To avoid possible explosion, use only returnable (not
disposable) service cylinders when removing refrigerant
from a system.
• Ensure the cylinder is free of damage which could
lead to a leak or explosion.
• Ensure the hydrostatic test date does not exceed 5
years.
• Ensure the pressure rating meets or exceeds 400
lbs.
When in doubt, do not use cylinder.
WARNING
System contaminants, improper service procedure
and/or physical abuse affecting hermetic compressor
electrical terminals may cause dangerous system
venting.
The successful development of hermetically sealed
refrigeration compressors has completely sealed the
compressor’s moving parts and electric motor inside a
common housing, minimizing refrigerant leaks and the
hazards sometimes associated with moving belts, pulleys
or couplings.
Fundamental to the design of hermetic compressors
is a method whereby electrical current is transmitted
to the compressor motor through terminal conductors
which pass through the compressor housing wall. These
terminals are sealed in a dielectric material which insulates
them from the housing and maintains the pressure tight
integrity of the hermetic compressor. The terminals and
their dielectric embedment are strongly constructed,
but are vulnerable to careless compressor installation
or maintenance procedures and equally vulnerable to
internal electrical short circuits caused by excessive system
contaminants.
In either of these instances, an electrical short between
the terminal and the compressor housing may result in
the loss of integrity between the terminal and its dielectric
embedment. This loss may cause the terminals to be
expelled, thereby venting the vaporous and liquid contents
of the compressor housing and system.
A venting compressor terminal normally presents no
danger to anyone, providing the terminal protective cover
is properly in place.
If, however, the terminal protective cover is not properly in
place, a venting terminal may discharge a combination of
A. hot lubricating oil and refrigerant
B. flammable mixture (if system is contaminated
with air)
in a stream of spray which may be dangerous to anyone in
the vicinity. Death or serious bodily injury could occur.
Under no circumstances is a hermetic compressor to be
electrically energized and/or operated without having the
terminal protective cover properly in place.
See Service Section S-17 for proper servicing.
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