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REPAIRING DAMAGED INSULATION
Areas of condensation on the cabinet surface are an indi-
cation that the insulation is in need of repair.
If the insulation in need of repair is otherwise in good con-
dition, the insulation should be cut in an X pattern, peeled
open, glued with an appropriate all-purpose glue and
placed back against the cabinet surface, being careful to
not overly compress the insulation so the insulation can
retain its original thickness. If such repair is not possible,
replace the insulation. If using foil-faced insulation, any
cut, tear, or separations in the insulation surface must be
taped with a similar foil-faced tape.
1. CUT INSULATION IN X PATTERN
2. APPLY GLUE
3. PRESS GLUED TABS AGAINST CABINET
GLUE - Make sure there is
full coverage of glue on the
metal or insulation so there
are no areas where air
pockets may form which
can lead to sweating.
FIGURE 17. Repairing Insulation
Professional Maintenance
NOTICE !
Failure to follow instructions will cause damage to
the unit.
This unit is equipped with an aluminum coil.
Aluminum coils may be damaged by exposure to
solutions with a pH below 5 or above 9. The alumi-
num coil should be cleaned using potable water
at a moderate pressure (less than 50psi). If the
coil cannot be cleaned using water alone, Lennox
recommends use of a coil cleaner with a pH in the
range of 5 to 9. The coil must be rinsed thoroughly
after cleaning.
In coastal areas, the coil should be cleaned with
potable water several times per year to avoid corro-
sive buildup (salt).
Use of Air Handler During Construction
Lennox does not recommend the use of its air handler unit
during any phase of construction. Very low return air tem-
peratures, harmful vapors and operation of the unit with
clogged or misplaced lters will damage the unit.
Air handler units may be used for heating (heat pumps)
or cooling of buildings under construction, if the following
conditions are met:
• A room thermostat must control the air handler. The use
of xed jumpers is not allowed.
• Air lter must be installed in the system and must be
maintained during construction.
• Air lter must be replaced upon construction comple-
tion.
• The air handler evaporator coil, supply fan assembly
and duct system must be thoroughly cleaned following
nal construction clean-up.
• All air handler operating conditions must be veried ac-
cording to these installation instructions.
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