
EDUS39-600-F1_a Installation
FXFQ-M 27
Ceiling work
(2) Adjust the unit to the correct position for installation.
(Refer to Section 4. (1) PREPARATIONS BEFORE
INSTALLATION, P. 67.
(3) Make sure the unit is horizontally level.
• The indoor unit is equipped with a built-in drain
pump and float switch. At each of the unit’s 4 cor-
ners, verify that it is level by using a waterlevel or a
water-filled vinyl tube.
If the unit is inclined against condensate flow, the
float switch may malfunction and cause water to
drip.
(4) Remove the washer-fixing plate (7) used for preventing
the washer from falling and tighten the upper nut.
(5) Remove the paper pattern for installation (5).
6-2 For existing ceilings
(6) Adjust the height and position of the unit.
Refer toPREPARATIONS BEFORE INSTALLATION-(1).
(7) Perform steps (4), (5) in “6-1 For new ceilings”.
7. REFRIGERANT PIPING WORK
7-1 GENERAL INSTRUCTIONS
•
For refrigerant piping of outdoor units, see the installation man-
ual attached to the outdoor unit.
• Before refrigerant piping work, check which type of refriger-
ant is used. Proper operation is not possible if the types of
refrigerant are not the same.
• The outdoor unit is charged with refrigerant.
DANGER
• Refrigerant gas may produce toxic gas if it comes in contact
with fire such as from a fan, heater, stove or cooking device.
Exposure to this gas could result in severe injury or death.
NOTE
• Use a pipe cutter and flare suitable for the type of refriger-
ant.
• To prevent dust, moisture or other foreign matter from infiltrat-
ing the tube, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant to
get mixed into the refrigerant circuit, such as air. If any refrig-
erant gas leaks while working on the unit, ventilate the
room immediately. .
7-2 Connecting the refrigerant piping
• When connecting the flare nut, coat the flare both inside
and outside with ester
oil or ether oil and initially tighten by
hand 3 or 4 turns before tightening firmly.
• To prevent flare nut cracking and gas leaks, be sure to use
both a spanner and torque wrench together, as shown in the
drawing below, when connecting or disconnecting pipes to/
from the unit.
Paper pattern for
installation 5)
Center of the unit
Center of ceiling opening
Ceiling material
Lower surface
of ceiling
[Height adjustment of the unit.]
Screws 6)
(attached)
[Installation of paper pattern for installation]
Water level
Vinyl tube
Ester oil or ether oil.
Torque wrench
Spanner
Piping union
Flare nut
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