Fujitsu FO2416RTJNAA Installation Instructions Manual page 17

4.5 Line Set Installation
• If tubing is to be run underground, it must be run in
Use a good quality tubing bender on the vapor line
TEMPORARY
HANGER
• Route the tubing using temporary hangers; then
straighten the tubing and install permanent hangers.
The tubing must be adequately supported.
• Isolate the vapor line from the building structure. If
ceiling, or flooring, the vibration of the vapor line
4.5.1 Important Tubing
Installation Practices
outdoor unit and indoor coil:
line size and liquid line size.
• If a portion of the liquid line passes through a
very hot area where liquid refrigerant can be
heated to form vapor, insulating the liquid line
is required.
• Use clean, dehydrated, sealed refrigeration-grade
tubing.
and connections are to be made.
R-410A heat pump units and must be installed in
the liquid line upon unit installation.
measures to drain the oil from those areas.
structure.
before connecting to the outdoor unit and indoor
coil to remove debris that can plug the expansion
device.
PERMANENT
HANGER
holding the tubing in a position to prevent chips
from falling into tubing. Burrs such as those
caused by tubing cutters can affect performance
dramatically, particularly on small diameter liquid
lines.
bends.
mechanical damage should be avoided. If it is
necessary to use such locations, the copper
tubing should be protected by a housing to
prevent damage.
4.0 INSTALLATION
ST-A1226-05-00
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