English
10
<Ceiling work>
(1-3)
Adjust the unit to the right position for installation.
(Refer to
“4. PREPARATIONS BEFORE INSTALLATION-(1)”.)
• Using the Installation guide (15) allows you to check the positions from the underside of the unit to
the lower ceiling surface.
Apply the short
side of the cut-
out section.
Lower ceiling
surface
Underside of
the unit
Installation guide (15)
(accessory)
Fig. 12
(1-4)
Check the unit is horizontally level.
CAUTION
Level
Vinyl tube
[Maintaining horizontality]
Fig. 13
• Verify that it is level by using a level or a water-filled vinyl
tube. (If the unit is tilted against condensate flow, the
float switch may malfunction and cause water to drip.)
(1-5)
Remove the washer fixing plate (7) used for preventing the
washer from falling and tighten the upper nut.
(1-2)
Remove the paper pattern for installation (5).
(2) For existing ceilings
(2-1)
Install the indoor unit temporarily.
Perform step (1-1) in (1) For new ceilings.
(2-2)
Adjust the height and position of the unit. (Refer to
“4.
PREPARATIONS BEFORE INSTALLATION-(1)”
and
(1-3) in (1) For new ceilings.)
(2-3)
Perform steps (1-4), (1-5) in (1) For new ceilings.
6. REFRIGERANT PIPING WORK
‹For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.›
‹Execute heat insulation work completely on both sides of the gas piping and the liquid piping. Otherwise, a
water leakage can result sometimes.›
‹ (When using a heat pump, the temperature of the gas piping can reach up to approximately 120°C, so
use insulation which is sufficiently resistant.) ›
‹Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 30°C or
RH80%, reinforce the refrigerant insulation. (20mm or thicker) Condensate may form on the surface of the
insulating material.
‹ Be sure to check the type of R410A refrigerant to be used before doing any work. (Using an incorrect
refrig-erant will prevent normal operation of the unit.)›
CAUTION
This product is designed to be used with new refrigerant (R410A). Always observe the precautions on the
following when installing.
• Use a pipe cutter and flare suitable for the type of refrigerant.
• Apply ester oil or ether oil around the flare section before connecting.
• Use the flare nut provided to the unit. Do not use a different flare nut (class 1), or otherwise refrigerant
leakage may result.
