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88-M4PW004-1B-EN
Section 1. Safety
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WARNING
This information is intended for use by individuals possessing
adequate backgrounds of electrical and mechanical experience.
Any attempt to repair a central air conditioning product may
result in personal injury and/or property damage. The manufac-
ture 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 mois-
ture 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 Bulletins SS-APG006-EN
and APP-APG011-EN.
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.
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 APPROVED POE
COMPRESSOR OIL.
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WARNING
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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 follow all
electrical safety precautions when exposed to live
electrical components could result in death or serious
injury.
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WARNING
If using existing refrigerant lines make certain that all
joints are brazed, not soldered.
CAUTION
Scroll compressor dome temperatures may be hot. Do
not touch the top of compressor; it may cause minor
to severe burning.
CAUTION
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WARNING
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service
information pack upon completion of work.
These instructions do not cover all variations in systems, nor do they provide for every possible contingency to be met in con-
nection with the installation. Should further information be desired, or should particular problems arise which are not sufficiently
covered for the purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
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