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Installation Procedure
Spacing requirements
Space requirements for installation & service.
Construction Standard for Inspection opening
An inspection opening is required for service and unit replace-
ment.
1) If the ceiling is a grid type, an inspection opening is not
required.
2) If the ceiling is plaster board, an inspection opening is
required. The size of the opening will vary based on the height
inside the ceiling.
a. Height is more than 1.64 ft (0.5 m): Only "B" [Inspection for
PBA] is applied.
b. Height is less than 1.64 ft (0.5 m): Both "A"&"B" are applied.
c. "A"&"B" are inspection opening .
Unit Width(W)
"A"=W+3.94 inch (100 mm)
• You must have 0.79 inch (20 mm) or more space between the
ceiling and the bottom of indoor unit to prevent transmission of
noise and vibration from the unit into the space.
• It is possible to install the unit at an height of between 7.2 ~ 8.2
ft (2.2 ~ 2.5 m )from the ground,if the unit has a duct with a
well defined lenght [11.81 inch (300 mm) or more], to avoid fan
motor blower contact.
• If you install the cassette or duct type indoor unit on the ceiling
with humidity over 80%, you must apply extra 0.39 inch (10 mm)
of polyethylene foam or other insulation with similar material
on the body of the indoor unit.
6
English
"B"=19.69 inch
(500 mm)
0.79 inch (20 mm) or more
0.79 inch (20 mm) or more
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