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UNIT DIMENSIONS - INCHES (MM)
A
SIDE VIEW
FIGURE 2
TABLE 1
UNIT DIMENSIONS
Model Numbers
NS18A24TA4
NS18A36TA4
NS18A48TA4
NS18A60TA4
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 roofing 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 specified
with AHRI. Coils previously charged with HCFC-22 must
be flushed.
Page 2 of 17
B
A
B
28.25 (718)
29.25 (743)
28.25 (718)
33.25 (845)
32.25 (817)
33.25 (845)
32.25 (817)
43.25 (1099)
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 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.
BUILDING
STRUCTURE
STEP 2 – REFRIGERANT PIPING –
Flushing Existing Line Set & Indoor Coil
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.
Issue 2227
IMPORTANT
PLACEMENT
INSTALL UNIT AWAY
FROM WINDOWS
TWO 90º ELBOWS INSTALLED IN LINE SET
WILL REDUCE LINE SET VIBRATION
FIGURE 3
SLAB MOUNTING
DISCHARGE AIR
MOUNTING SLAB
GROUND LEVEL
FIGURE 4
WARNING
508277-01G / 31-5000716
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