English
5
4) Set the suspension bolt. (Use W3/8 or M8-M10 size sus-
pension bolts.)
• Adjust the distance from the unit to the ceiling slab
beforehand.
(Refer to Fig. 8)
NOTE
NOTE
NOTE
NOTE
• All the above parts are field supplied.
5. INDOOR UNIT INSTALLATION
Installing optional accessories before installing the indoor
unit is easier.
As for the parts to be used for installation work, be sure to use
the provided accessories and specified parts designated by our
company.
(1) Secure the hooks to the eyebolts.
(Refer to Fig. 9)
NOTE
NOTE
NOTE
NOTE
• To ensure they are safely secured, use the included wash-
ers, and secure them with a double nut to make sure.
(2) Lift the indoor unit’s main body, insert the bolt (M8) for
the hook into the attachment part on the hook, while
sliding the main body from the front.
(Refer to Fig. 10)
(3) Fasten the bolts for the hooks (M8) securely in the four
locations, left and right.
(Refer to Fig. 10)
(4) Replace the screws for the hooks which had been
removed (M5) securely in 2 places left and right. This is
necessary to prevent any forward and back deviance in
the main body of the indoor unit.
(Refer to Fig. 10)
(5) When hanging the indoor unit main body, be sure to
use a level or a plastic tube with water in it to make sure
the drain piping is set either level or slightly tilted, in
order to ensure proper drainage.
(Refer to Fig. 11)
A.When the drain piping is tilted to the right, or to the right
and back.
Place it level, or tilt it slightly to the right or the back.
(Within 1°.)
B.When the drain piping is tilted to the left, or to the left and
back.
Place it level, or tilt it slightly to the left or the back.
(Within 1°.)
CAUTION
Setting the unit at an angle opposite to the drain piping
might cause leaks.
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. (20 mm or thicker) Con-
densation may form on the surface of the insulating mate-
rial.
〉〉〉〉
〈〈〈〈
Before refrigerant piping work, check which type of refrig-
erant is used. Proper operation is not possible if the types
of refrigerant are not the same.
〉〉〉〉
CAUTION
•
Use a pipe cutter and flare suitable for the type of refrig-
erant.
•
Apply ester oil or ether oil around the flare portions
before connecting.
•
To prevent dust, moisture or other foreign matter from
infiltrating the tube, either pinch the end or cover it with
tape.
•
Do not allow anything other than the designated refrig-
erant to get mixed into the refrigerant circuit, such as air,
etc. If any refrigerant gas leaks while working on the
unit, ventilate the room thoroughly right away.
Ceiling slab
Anchor
Suspension bolt
False ceiling
25-5
5
(length : mm)
Fig. 8
Use a hole-in-anchor for existing ceilings, and a sunken insert,
sunken anchor or other part to be procured in the field for new
ceilings to reinforce the ceiling to bearing the weight of the unit.
Adjust clearance from the ceiling before proceeding further.
Nut (Field supplied)
Washer (3) (accessory)
Double nut
Hanger bracket
Fig. 9
Hanger bracket
Attachment part
Hanger bracket
setting bolt (M8)
Hanger bracket
fixing screw (M5)
Fig. 10
≤
1°
≤
1°
≤
1°
A
A.B
B
Fig. 11
01_EN_3P172532-7.fm Page 5 Thursday, December 15, 2005 2:45 PM
