Leak Testing The System - Lennox XPG20 Installation Instructions Manual

CAUTION
This procedure should not be performed on
systems which contain contaminants (Example:
compressor burn out).
IMPORTANT
If this unit is being matched with an approved line
set or indoor unit coil which was previously
charged with mineral oil, or if it is being matched
with a coil which was manufactured before
January of 1999, the coil and line set must be
flushed prior to installation. Take care to empty all
existing traps. Polyol ester (POE) oils are used in
Lennox units charged with HFC−410A refrigerant.
Residual mineral oil can act as an insulator,
preventing proper heat transfer. It can also clog
the expansion device, and reduce the system
performance and capacity.
Failure to properly flush the system per the
instructions below will void the warranty.
IMPORTANT
The Environmental
prohibits the intentional venting of HFC refrigerants
during maintenance, service, repair and disposal of
appliance. Approved
recycling or reclaiming must be followed.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause personal injury, loss of life,
or damage to property.
Installation and service must be performed by a
licensed professional installer (or equivalent) or a
service agency.
Protection Agency
methods of recovery,

Leak Testing the System

Leak detector must be capable of sensing HFC
refrigerant.
(EPA)
Refrigerant can be harmful if it is inhaled.
Refrigerant
responsibly.
Failure to follow this warning may result in personal
injury or death.
Page 15
WARNING
Fire, Explosion and Personal Safety
Hazard.
Failure to follow this warning could
result in damage, personal injury or
death.
Never use oxygen to pressurize or
purge refrigeration lines. Oxygen,
when exposed to a spark or open
flame, can cause damage by fire and/
or an explosion, that could result in
personal injury or death.
IMPORTANT
WARNING
When using a high pressure gas such
as dry nitrogen to pressurize a
refrigeration or air
system, use a regulator that can
control the pressure down to 1 or 2
psig (6.9 to 13.8 kPa).
WARNING
must be used and
conditioning
recovered
XPG20 SERIES