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R410A Refrigerant (continued)
The gauge connection on the Samsung units is a 5/16” male, so an adaptor,
part # R410A-ADPT (Yellow Jacket item #19173) is required to connect a
standard North American set of R410A gauges to the Samsung unit.
Unit location
Indoor unit : High Wall units should be located a minimum of 4ft from the
ground. Also, some of the Indoor unit clearances listed in the specific unit
Installation Manuals can be decrease to a minimum clearance of 2 inches
from the ceiling to the top of the unit, while still maintaining unit performance
and efficiency levels. Ensure that no obstacles are directly in front of
the unit for a Minimum Distance of 10-12ft on the AQV/N/AR09 & 12,
MH026/035FNCA, 20-25ft on the AQV/N/AR18 & 24, MH052FNCA
and 25-30ft on the AQV/N36 so that bounce back of the conditioned air is
prevented and adequate airflow is maintained, keeping the indoor coil warm
and allowing the system to run to full capacity when necessary. If any system
is prevented from running at full capacity regularly, whether it is from impeded
airflow or over sizing, it will have an adverse affect on the system ability to
properly return oil to the compressor. Over time this will cause inconsistent
performance, error codes, and premature failure of components.
Ceiling Cassette units must have a Minimum Distance of 5ft from the louver
opening to any wall or other obstacle for the same reasons as listed above.
Outdoor unit : Ensure line set runs are adhered to, it is required that a
minimum line set length of 10ft maintained and exceeding the published
maximum line set length is not permitted, under any circumstance.
Also, keep in mind that, since the expansion valve is located in the outdoor
unit, the line set is merely an extension of the indoor coil and, although
insulated, the longer the line set run is the more likely there will noticeable
loss of capacity.
Minimum clearances of 6” behind and 24” in front of the outdoor unit must also
be maintained, enough clearance must be maintained from the sides to
accommodate service of the unit.
Since these units are heat pumps, Raise up Outdoor unit 4 to 6” from the
pad/ground to help drain the unit after a defrost cycle. Also, ensure unit is
capable of operating in desired ambient temperatures. As previously stated, if
the outdoor coil temperature is allowed to drop below 14 DegF, the system will
lock out, not restarting until that temperature rises above 14 DegF.
(18 pages)
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