Page 2
A
B
SIDE VIEW
UNIT DIMENSIONS - INCHES (MM)
FIGURE 2
TABLE 1
UNIT DIMENSIONS
Model Numbers A B
ML18XC2-024-230A 28.25 (718) 29.25 (743)
ML18XC2-036-230A 28.25 (718) 33.25 (845)
ML18XC2-048-230A 32.25 (817) 33.25 (845)
ML18XC2-060-230A 32.25 (817) 43.25 (1099)
STEP 1 – SETTING THE UNIT (Continued) –
Unit Placement
CAUTION
Before attempting to perform any service or maintenance,
turn the electrical power to unit OFF at disconnect switch.
WARNING
To prevent personal injury, as well as damage to panels,
unit or structure, observe the following:
While installing or servicing this unit, carefully stow all
removed panels so that the panels will not cause injury
to personnel, objects or nearby structures. Also, take
care to store panels where they will not be subject to
damage (e.g., being bent or scratched).
While handling or stowing the panels, consider any
weather conditions (especially wind) that may cause
panels to be blown around and damaged.
NOTICE!
Roof Damage!
This system contains both refrigerant and oil. Some
rubber roong material may absorb oil, causing the
rubber to degrade. Failure to follow this notice could
result in damage to roof surface.
IMPORTANT
This unit must be matched with an indoor coil as
specied with AHRI. For AHRI Certied system match-
ups and expanded ratings, visit www.LennoxPros.com
Coils previously charged with HCFC-22 must be ushed.
IMPORTANT
Exhaust vents from dryers, water heaters and furnaces
should be directed away from the outdoor unit. Prolonged
exposure to exhaust gases and the chemicals contained
within them may cause condensation to form on the steel
cabinet and other metal components of the outdoor unit.
This will diminish unit performance and longevity.
INSTALL UNIT AWAY
FROM WINDOWS
TWO 90º ELBOWS INSTALLED IN LINE SET
WILL REDUCE LINE SET VIBRATION
PLACEMENT
FIGURE 3
Install unit level or, if on a slope, maintain slope tolerance of 2
degrees (or 2 inches per 5 feet [50 mm per 1.5 m]) away from
building structure.
GROUND LEVEL
MOUNTING SLAB
BUILDING
STRUCTURE
DISCHARGE AIR
SLAB MOUNTING
FIGURE 4
STEP 2 – REFRIGERANT PIPING –
Flushing Existing Line Set & Indoor Coil
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.
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