Preparation Before Installation; Installation Of Indoor Unit - Daikin FCQ18AAVJU Installation Manual

3. PREPARATION BEFORE INSTALLATION

(1) Check the relation of location between the ceiling
opening and the indoor unit suspension bolts.
5 Suspension bolt pitch
3 Indoor unit
2 Ceiling opening
1 Decoration panel
Fig. 4
1 37-3/8 (950)
2 33-7/8 – 35-7/8 (860 – 910)
3 33-1/16 (840)
4 30-3/4 (780)
5 28 (710)
Ceiling
A arrow view
Fig. 5
Decoration Panel BYCQ54EEFU
4-15/16 – 5-1/8
in. (mm) (125 – 130)
NOTE
If the indoor unit is not positioned at the correct height, there
will be a gap between it and the decoration panel that could
result in water leakage or abnormal noise.
CAUTION
Reduce the distance between the unit and ceiling to
1-3/8 in. (35 mm) or below in order to maintain an over-
lapping panel margin 13/16 in. (20 mm) for the opening
on the ceiling. If the distance exceeds 1-3/8 in. (35 mm),
attach ceiling material to the part marked
the ceiling. (Refer to Fig. 6)
English
Refrigerant
piping
Suspension
bolt (×4)
A
[unit: in. (mm)]
Hanger bracket
BYCQ54EEGFU
8-1/16 – 8-1/4
(205 – 210)
or replace
Frame
Ceiling
material
≤1-3/8 (35)
≥13/16
(20)
33-7/8 to 35-7/8 (860 – 910)
(Ceiling-opening dimension)
Fig. 6
(2) Make the ceiling opening required for installation.
• Use the installation pattern paper (5) matched to the
ceiling opening dimension.
• Make the ceiling opening required for installation at the
installation location and carry out refrigerant/drain pip-
ing, power supply wiring, remote controller wiring and
transmission wiring. (Refer to each section 5. REFRIG-
ERANT PIP ING WORK, 6. DRAIN PIPING WORK
and 7. ELECTRIC WIRING WORK)
• After making the opening, it may be necessary to rein-
force the ceiling framework to maintain a level ceiling
and prevent it from vibrating.
For details, consult with the builder and interior de-
signer.
(3) Install the suspension bolts.
(Use a M8-M10 sized bolt or equivalent.)
• Use hole-in-anchors for the existing bolts and embed-
ded inserts or foundation bolts for new bolts, and fix the
indoor unit firmly to the building so that it may withstand
the weight of the unit.
In addition, adjust clearance (2 – 4 in. (50 – 100 mm))
from the ceiling in advance.
<Installation examples>
Note) The above shown parts are all field supply.

4. INSTALLATION OF INDOOR UNIT

<<It is easy to attach the optional accessories (except for
decoration panel) before installing the indoor unit. Refer
to also the installation manual attached to the optional
accessories.>>
For installation, use the attached accessories and speci-
fied accessories.
[Install the indoor unit in the order of steps (1), (2), (3), (4), (5)
and (6) in case of a newly built ceiling, or in the order of steps
(1), (3), (4) and (5) in case of an existing ceiling.]
[unit: in. (mm)]
≤1-3/8 (35)
≥13/16
(20)
(Ceiling-panel
overlapping
dimension)
Ceiling slab
Foundation bolt
Long nut or turn-buckle
Suspension bolt
Ceiling surface
4