IMPORTANT INFORMATION
3
NOTICE:
When the outdoor unit is connected to main power, the
inverter board has a small current flowing into it to be pre
-
pared for operation when needed. Due to this, the Control
Board components have to be cooled even when the unit is
not running. For this cooling operation, the condenser fan
may come on at any time, including in the winter months.
Any obstruction to the outdoor fan should be avoided at all
times when the unit is powered to prevent damage.
The successful development of hermetically sealed refriger-
ation 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 pro-
cedures 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 embed-
ment. 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 dan-
ger 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 for proper servicing.
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 re-
frigerant.
•
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 refriger-
ant used.
•
Store cylinders in a cool, dry place. Never use a cylin-
der 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
To avoid possible injury, explosion or death, practice safe
handling of refrigerants.
CAUTION
The compressor PVE oil for R-410A units is extremely suscep-
tible to moisture absorption and could cause compressor
failure. Do not leave system open to atmosphere any longer
than necessary for installation.
NOTICE: The entire system (combination of indoor
and outdoor sections) must be manufacturer ap-
proved and Air-Conditioning, Heating, and Refrig-
eration Institute (AHRI) listed.
NOTE: Installation of unmatched systems is not
permitted. Damage or repairs due to installation
of unmatched systems is not covered under the
warranty.
WARNING
System contaminants, improper service procedure and/or
physical abuse affecting hermetic compressor electrical
terminals may cause dangerous system venting.
