Fujitsu FO2416RTJNAA - Page 17

17
4.5 Line Set Installation
• If tubing is to be run underground, it must be run in
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Use a good quality tubing bender on the vapor line
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• 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
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ceiling, or flooring, the vibration of the vapor line
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structure.
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before connecting to the outdoor unit and indoor
coil to remove debris that can plug the expansion
device.
ST-A1226-05-00
4.0 INSTALLATION
4.5.1 Important Tubing
Installation Practices
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outdoor unit and indoor coil:
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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.
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and connections are to be made.
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R-410A heat pump units and must be installed in
the liquid line upon unit installation.
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measures to drain the oil from those areas.
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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.
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bends.
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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.
Tubing
TEMPORARY
HANGER
PERMANENT
HANGER