Engineering Manual

VERTICAL-HORIZONTAL INDOOR UNITS
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Factory Supplied Materials
• Owner’s Manual
• Installation Manual
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Required Tools
• Level
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• Electric drill
• Hole core drill
• Flaring tool set
• Torque wrenches
• Hexagonal wrench
• Gas-leak detector
• Thermometer
Selecting the Best Location
Do’s
• Place the unit where air circulation through the ducts will not be
blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
• Ensure there is sufficient strength to bear the load of the indoor
unit.
• Ensure there is sufficient maintenance space.
• Locate the indoor unit in a location that is level, and where it can
be easily connected to the outdoor unit / branch distribution unit.
Note:
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for the unit and all components.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Installing in an Area with High Humidity Levels
If the environment is prone to humidity levels of 80% or more (near the ocean, lakes, etc.) or where steam could collect in the plenum:
• Install additional insulation to the indoor unit (glass wool insulation >13/32 inches thick).
• Install additional insulation to the refrigerant piping (insulation >13/16 inches thick).
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conditioned space. Also, add a ceiling grille for ventilation.
WARNING
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Note:
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Don’ts
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The unit may be damaged, may malfunction, and/or will not
operate as designed if installed in any of the conditions
listed.
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156 | VERTICAL-HORIZONTAL
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F