Multi F Engineering Manual

Installation and Best Layout Practices
Selecting the Best Location
Do’s
• Place the unit where air circulation will not be blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
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• 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.
DUCT (LOW STATIC) INDOOR UNITS
)LJXUHGeneral Installation Guidelines.
Model / Capacity (Btu/h)
Dimensions (in.)
AB
LDN097HV4 / 9,000
31-1/2
31-1/2
LDN127HV4 / 12,000
39-3/8
LDN187HV4 / 18,000
7DEOHGeneral Access Panel Dimensions.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas(floors, walls) in some rooms will be
exposed to unconditioned air (room will be above or next to an unheated garage
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• Verify that carpet is or will be installed (carpet will 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,
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• 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).
• Seal all gaps between the indoor
unit and the ceiling tiles (make the area air
tight) so that humidity does not transfer from the plenum to the conditioned
space. Also, add a ceiling grille for ventilation.
Access Opening
(
23-5/8
x
23-5/8
)
Control box
H = ≤25/32
• "H" dimension is necessary to ensure a slope is included for
condensate drainage.
Side view
23-5/8
23-5/8
(Unit : Inch)
(Unit : Inch)
Top view
A (Min)
Ceiling
Service Space
A
B
B (Min)
)LJXUHService / Access Panel Dimensions.
Don’ts
• Do not install the unit near a heat or steam source, or where considerable
amounts of oil, iron powder, or flour are used.
• Do not install the unit where sulfuric acid and flammable or corrosive gases
are generated, vented into, or stored.
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•
Do not install the unit near a doorway.
The unit will be damaged, will malfunction, and / or will not operate as
designed if installed in any of the conditions listed.
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ventilation. If there are concerns about VOCs in the environment where the
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must be provided. Additionally, in buildings where IDUs will be exposed to
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for each IDU where the entire coil is dipped, not sprayed.
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and all installation parts.
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86 | DUCT (LOW STATIC)
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F