Refrigerant Piping Work - Daikin FXFQ25SVM Installation Manual

[Washer clamp (7) fixing method]
Washer clamp (7)
(accessory)
Insert
(2)
• The installation pattern paper (5) is matched to the ceil-
ing opening dimension.
For the height of ceiling lower surface from the floor
level, confirm with the builder of ceiling.
• The center of the ceiling opening is shown in the instal-
lation pattern paper (5).
The center of the indoor unit is indicated as triangle
marks on the sides and bottom of the unit and those on
the installation pattern paper (5).
• Put the installation pattern paper (5) to the indoor unit
with four screws (6).
At this time, put the installation pattern paper (5) to the
indoor unit with the triangle marks on the indoor unit and
those on the installation pattern paper (5) aligned.
Center of the
indoor unit
Center mark
of the unit
Screw (6)
(accessory)
[Installation of the installation pattern paper]
< Installation work after the ceiling work is finished >
(3) Adjust so that the unit will be properly positioned.
( Refer to "4. PREPARATION BEFORE INSTALLATION
– (1)" )
• Using the Installation guide (15) allows you to check the
positions from the underside of the unit to the lower ceil-
ing surface.
Lower ceiling
surface
Installation guide (15)
(4) Check the level of the unit. (Refer to Fig. 9)
(5) Remove the washer clamp (7) used for preventing the
washer for hanger (3) from dropping and tighten the upper
side nut.
3P335596-2D English
Upper side nut
Fig. 8
Center of
ceiling opening
Installation
pattern
paper (5)
(accessory)
Screw (6)
(accessory)
Apply the short
side of the
cut-out section.
Underside
of the unit
(6) Remove the installation pattern paper (5).
Level
[Maintaining horizontality]
CAUTION
• Install the indoor unit leveled.
If the indoor unit is inclined and the drain piping side gets
high, it may cause malfunction of a float switch and results
in water leakage.
• Attach nuts on the upper and lower side of hanger.
If there is no upper nut and the lower nut is over-tightened,
the hanger and the top plate will deform and cause abnormal
sound.
• Do not insert materials other than that specified into
the clearance between the hanger and the washer for
hanger (3).
Unless the washers are properly attached, the hanging
bolts may come off from the hanger.
WARNING
The indoor unit must be securely installed on a place
that can withstand the mass.
If the strength is insufficient, the indoor unit may fall down
and cause injuries.

6. REFRIGERANT PIPING WORK

• For the outdoor unit refrigerant piping, refer to the installation
manual attached to the outdoor unit.
• Carry out insulation of both gas and liquid refrigerant piping
securely. If not insulated, it may cause water leakage. For
gas piping, use insulation material of which heat resistant
temperature is not less than 120°C.
For use under high humidity, strengthen the insulation
material for refrigerant piping. If not strengthened, the
surface of insulation material may sweat.
• Before installation work, make sure that the refrigerant
is R410A. (Unless the refrigerant is R410A, the nor mal
operation cannot be expected.)
CAUTION
This air conditioner is a dedicated model for new re-
frigerant R410A. Make sure to meet the require ments
shown below and carry out installation work.
• Use dedicated piping cutters and flaring tools for
R410A.
• When making a flare connection, coat the flared inner
surface only with ether oil or ester oil.
• Use only the flare nuts attached to the air conditioner.
If other flare nuts are used, it may cause refrigerant
leakage.
• To prevent contamination or moisture from getting
into the piping, take measures such as pinch ing or
taping the pipings.
Vinyl tube
Fig. 9
6