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XP25
INSTALLING ISOLATION GROMMETS
Locate the isolation grommets (provided). Slide grommets
onto vapor and liquid lines. Insert grommets into piping
panel to isolate refrigerant lines from sheet metal edges.
TWO ISOLATION GROMMETS
ARE PROVIDED FOR THE
LIQUID AND SUCTION LINE PIPE
PANEL PASS THROUGH.
LIQUID LINE
SUCTION LINE
REAR VIEW OF UNIT EXTERIOR
PIPING PANEL
Figure 11. Isolation Grommets
IMPORTANT
The Environmental Protection Agency (EPA) prohibits the
intentional venting of HFC refrigerants during
maintenance, service, repair and disposal of appliance.
Approved methods of recovery, recycling or reclaiming
must be followed.
IMPORTANT
Leak detector must be capable of sensing HFC
refrigerant.
Leak Testing the System
WARNING
When using a high pressure gas such as dry nitrogen to
pressurize a refrigeration or air conditioning system, use
a regulator that can control the pressure down to 1 or 2
psig (6.9 to 13.8 kPa).
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.
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.
Failure to follow this warning may result in personal injury
or death.
