Warnings and Cautions
WARNING
R-410A Refrigerant under Higher Pressure than R-22!
The units described in this manual use R-410A refrigerant which operates at 50 to 70%
higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant
cylinders may contain a "dip" tube to allow for charging of liquid refrigerant into the
system. For speci c handling concerns with R-410A, please contact your local sales of ce.
Failure to use R-410A approved service equipment could result in standard equipment
exploding under R-410A higher pressure which could result in death or serious injury.
NOTICE
Use appropriate oil with R410A systems. Oil type is found at the bottom of Connection Pipe
Requirements table (included in the outdoor unit installation manual). R-410A systems
utilize POE (Polyolester) or PVE(Polyvinyl Ether) oil. Both oil types absorb moisture readily,
yet, lubrication properties vary. Do not leave the sealed system open to atmosphere except
during service for a short period of time. If the sealed system is left open longer than four
hours, the compressor oil must be changed. These systems utilize strainers placed before
and after the expansion device in the outdoor unit, if debris or moisture is suspected, these
strainers must be changed. Do not break a vacuum with air. Do not leak check the sealed
system with compressed air. Unless instructed by factory service representative, external
refrigeration driers are prohibited.
USE ONLY THE FACTORY RECOMMENDED OIL TYPE!
Important!
Environmental Concerns
Scientifi c research has shown that certain man-made chemicals can aff ect the earth's naturally occurring stratospheric
ozone layer when released to the atmosphere. In particular, several of the identifi ed chemicals that may aff ect the
ozone layer are refrigerants that contain chlorofl uorocarbons (CFC's) and those containing hydro-chlorofl uorocarbons
(HCFC's). Not all refrigerants containing these compounds have the same potential impact to the environment. The
Company advocates the responsible handling of all refrigerants, including industry replacements for CFC's such as
HCFC's and HFC's.
Responsible Refrigerant Practices
The manufacturer believes that responsible refrigerant practices are important to the environment, our customers,
and the air conditioning industry. All technicians who handle refrigerants must be certifi ed. The Federal Clean Air Act
(Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and
the equipment that is used in these service procedures. In addition, some states or municipalities may have additional
requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and
follow them.
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