Daikin FCQ18AAVJU Installation Manual page 6

(NOTE 1)
Indoor unit
Lighting
*60 (1,500) 60 (1,500)
or more or more
From the
80 (2,000) or more
wall
160 (4,000) or more
(NOTE2)
If the air outlet is in a close proximity to
both sides of the wall surface in a corner
installation etc., the distance of at least
Obstacles
80 in. (2,000 mm) is recommended
Fig. 2
NOTE
1. If the air passage is obstructed, or if the installation space
requirements are not met, performance may decrease or
the thermostat may easily turn off due to reduced airflow
rate and intake of discharged air.
2. In a roadside store or restaurant, the air flows in the order of
outdoor → attic → living space because the ventilation sys-
tem creates negative pressure in living space. As a result,
condensation may arise since the temperature and humid-
ity around the indoor unit become similar to the outdoor
environment due to direct intake of outside air into the attic.
CAUTION
• Any vents, light fixtures, or other appliances which may
disturb the airflow might soil the ceiling if too close, so fol-
low Fig. 2 when installing.
Note)
1. This restriction applies to the exposed type lighting,
but does not apply to the recessed type, which does
not protrude below the ceiling line.
2. The clearance from the wall (indicated with *) must be 20 in.
(500 mm) or more if the air outlet is closed or the horizontal
blade is set to Airflow block and, if the corners (left and right
corners of the target air outlet) are also closed by 8 in. (200
mm) or more.
For how to set the airflow direction (including Airflow block)
with the horizontal blade, refer to Individual Airflow Direc-
tion in the operation manual attached to the remote controller.
• Install the indoor and outdoor units, power supply wiring,
remote controller wiring and transmission wiring at least
40 in. (1 m) away from televisions or radios to prevent im-
age interference or noise.
(Depending on the radio waves, a distance of 40 in. (1 m)
may not be sufficient to eliminate the noise.)
• Install the indoor unit as far as possible from fluorescent lamps.
• Localized temperature difference from the room temperature,
if too large, can affect how the infrared floor sensor judges.
(This may occur, for example, in an area where floor heating/
high-temperature heat generating equipment is installed.)
• Each sensor has been set so that the center of the sensing
area is located in the center of the product 32 in. (800 mm)
above the floor (in case of the infrared presence sensor) or 0
in. (0 mm) above the floor (in case of the infrared floor sensor)
when the ceiling height is approximately 8-3/4 ft. (2.7 m).
(2) Ceiling height
• This indoor unit can be installed in a space of which
ceiling height is up to 11-1/2 ft. (3.5 m) (Type 30 · 36 · 42 ·
48: 13-3/4 ft. (4.2 m))
• However, if the ceiling height exceeds 8-3/4 ft. (2.7 m)
(Type 30~48: 10-1/2 ft. (3.2 m)), it is necessary to set
from the remote controller on site. Refer to the section
9. FIELD SETTING and 10. TEST OPERATION.
3
Exhaust fan Indoor unit
[unit: in. (mm)]
(3) Direction of the air discharge
• Select the number of directions of the optimum air
discharge for the shape or the position of the room.
• The number of directions of the air discharge can be
changed by installing a sealing material.
• When installing a sealing material, the field setting
from the remote controller is required. For details,
refer to the installation manual attached to the sealing
materials.
(It is set to the setting position number 01 (Standard ·
All round outlet) when shipped from the factory.)
• To use the optional sealing material kit to change the
setting of air discharge direction (4-way blow type (with
corners sealed)/3-way blow type/2-way blow type),
refer to the installation manual attached to it.
[Direction of air discharge]
* *
All round 4-way
Fig. 3
NOTE
Depending on the temperature, humidity and airflow condi-
tions in the attic due to the indoor airflow (air draft from ex-
haust fan, etc.), outside air intake and so on, condensation
may arise on the ceiling near the corner air outlet.
In that case, close the corner air outlet using the sealing mate-
rial kit (sold separately).
(4) Use suspension bolts for installation.
Investigate if the installation place can withstand the
weight of the indoor unit and, if necessary, hang the
indoor unit with bolts after it is reinforced by beams etc.
(Refer to the installation pattern paper (5) for the mounting pitch.)
(5) Infrared presence/floor sensor's sensing area
The sensing area is shown in the figure below.
Infrared floor
sensor
Infrared
presence sensor
32 in. (800 mm)
Piping connection
side
Drain connection
side
Indoor unit installation
8-3/4 (2.7)
height h [ft. (m)]
Infrared presence sen- Approx.
sor fa [ft. (m)]
28 (8.5)
Infrared floor sensor fb
Approx.
[ft. (m)] 36 (11)
* *
*: Refrigerant
piping
3-way 2-way
[Sensing area]
h
φa
φb
Infrared presence
sensor
Infrared floor
sensor
11-1/2 (3.5) 13 (4.0)
Approx. Approx.
37-1/2 (11.5) 44-1/2 (13.5)
Approx. Approx.
46 (14) 52-1/2 (16)
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