8
2”
Figure 3. Ground Level Installation
Ground Level
Ground level installations must be located according to
local building codes or ordinances and these requirements:
• Clearances must be in accordance with those shown
in Figure 2 (page 7).
• A suitable mounting pad (Figure 3) must be provided
and be separate from the building foundation. The
pad must be level and strong enough to support the
unit’s weight. The slab height must be a minimum of 2”
(5 cm) above grade and with adequate drainage.
• Refrigerant tubing should be supported in a manner
that the tubing will not vibrate or abrade during system
operation.
• Tubing should be kept clean of foreign debris during
installation.
• Every effort should be made by the installer to ensure
that the fi eld installed refrigerant containing components
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• The maximum recommended interconnecting
refrigerant line lengths are listed in Table 4 (page 15).
The vertical elevation difference between the indoor
and outdoor sections should not exceed 20 feet.
• If precise forming of refrigerant lines is required, a
copper tubing bender is recommended. Avoid sharp
bends and contact of the refrigerant lines with metal
surfaces.
• A fi lter dryer is provided with the unit and must be
installed in the liquid line of the system. If the installation
replaces a system with a fi lter dryer already present
in the liquid line, the fi lter dryer must be replaced with
the one supplied with the unit. The fi lter dryer must be
installed in strict accordance with the manufacturer’s
installation instructions.
• Optional equipment such as liquid line solenoid
valves, low ambient, etc., should be installed in
strict accordance with the manufacturer’s installation
instructions.
Connecting Refrigerant Tubing Between the Indoor
& Outdoor Unit
CAUTION:
This system uses R-410A refrigerant with POE
oil. When servicing, cover or seal openings to
minimize the exposure of the refrigerant system
to air to prevent accumulation of moisture and
other contaminants.
After outdoor and indoor unit placement has been
determined, route refrigerant tubing between the
equipment in accordance with sound installation practices.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be fl owing through the
joints during brazing. This will prevent internal oxidation
and scaling from occurring.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing.
