Fujitsu FO2416RTJNAA - Page 22

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4.6 Initial Leak Testing
Indoor coils have only a holding charge of dry
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are to be made.
WARNING: Do not use oxygen
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an explosion resulting in severe personal injury or
death.
• Pressurize line set and coil through service fittings
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set and coil evacuation (see Sections 4.7 and 4.8 for
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• The vapor line must be insulated for its entire
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performance losses. Closed-cell foam insulation
such as Armaflex and Rubatex
®
are satisfactory
insulations for this purpose. Use 1/2" [12.7 mm]
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may be required for long runs. The liquid line must
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line sets are used and anytime the liquid line is run
through an attic due to hot temperatures that occur
there.
4.7 Evacuation
Evacuation is one of the most important parts of the
entire installation and service procedure. The life
and efficiency of the equipment is dependent upon
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evacuating air and moisture from the system.
Air or nitrogen in the system increases condensing
temperature and pressure, resulting in increased
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capacity.
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result in compressor failure.
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proven sealed, connect the vacuum pump and
evacuate system to 500 microns and hold 500
microns or less for at least 15 minutes. The vacuum
pump must be connected to both the high and
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pressure ports. Use the largest size connections
available since restrictive service connections may
lead to false readings because of pressure drop
through the fittings.
4.8 Final Leak Testing
After the unit has been properly evacuated and
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Air Act prohibits releasing refrigerant into the
atmosphere.
ST-A1226-07-00
ST-A1226-06-00
4.0 INSTALLATION
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