10
English
<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.
(1-4)
Check the unit is horizontally level.
•
The indoor unit is equipped with a built-in drain pump and float
switch. Verify that it is level by using a level or a water-filled
vinyl tube.
CAUTION
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.
(1-6)
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 250°F, so use
insulation which is sufficiently resistant.)
〈
Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 86°F or
RH80%, reinforce the refrigerant insulation. (13/16in. 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.)
〉
Apply the short
side of the
cut-out section.
Lower ceiling
surface
Installation guide (15)
(accessory)
Underside of
the unit
Level
Vinyl tube
[Maintaining horizontality]
Fig. 13
01_EN_3P161684-5H.fm Page 10 Thursday, October 21, 2010 1:18 PM
