2 18-AC78D1-6
Section 1. Safety
This information is intended for use by individuals
possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair a cen-
tral air conditioning product may result in personal
injury and/or property damage. The manufacturer
or seller cannot be responsible for the interpretation
of this information, nor can it assume any liability in
connection with its use.
These units use R-410A refrigerant which operates
at 50 to 70% higher pressures than R-22. Use only
R-410A approved service equipment. Refrigerant
cylinders are painted a “Rose” color to indicate the
type of refrigerant and may contain a “dip” tube
to allow for charging of liquid refrigerant into the
system. All R-410A systems use a POE oil that
readily absorbs moisture from the atmosphere. To
limit this “hygroscopic” action, the system should
remain sealed whenever possible. If a system has
been open to the atmosphere for more than 4 hours,
the compressor oil must be replaced. Never break a
vacuum with air and always change the driers when
opening the system for component replacement. For
specific handling concerns with R-410A and POE oil
reference Retrofit Bulletin SSC-APG011-EN.
UNIT CONTAINS R-410A REFRIGERANT!
R-410A operating pressures exceed the limit of
R-22. Proper service equipment is required. Failure
to use proper service tools may result in equipment
damage or personal injury.
SERVICE
USE ONLY R-410A REFRIGERANT AND AP-
PROVED POE COMPRESSOR OIL.
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and trouble-
shooting of this product, it may be necessary to
work with live electrical components. Failure to fol-
low all electrical safety precautions when exposed
to live electrical components could result in death or
serious injury.
If using existing refrigerant lines make certain that
all joints are brazed, not soldered.
Scroll compressor dome temperatures may be hot.
Do not touch the top of compressor; it may cause
minor to severe burning.
Extreme caution should be exercised when opening
the Liquid Line Service Valve. Turn counterclockwise
until the valve stem just touches the rolled edge. No
torque is required. Failure to follow this warning will
result in abrupt release of system charge and may
result in personal injury and /or property damage.
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