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English
(3) Install suspension bolts.
(Use bolts of 10 mm diameter.)
• Install the equipment where supporting structures are
strong enough to bear the equipment’s weight. Use
embedded inserts or anchor bolts with new buildings and
hole-in-anchors with old buildings.
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) Fix the hanger bracket to the suspension bolt. Tighten both
upper and lower nuts firmly using washers.
(2) Adjust the height of the unit.
(3) Make sure the unit is
level.
• Level the unit with
a level when
installing. If the unit
is not level, it could
become the source
of water leaks.
• When leveling the
unit, check all four
corners with a level
or a vinyl tube
containing water.
(See the figure on
the right.)
(4) Tighten the nuts on the top.
(5) Insulate the two hanger brackets on the discharge side with
the insulation material. (× 2) Insulate the edges so that the
surface and edges of the hanger brackets cannot be seen.
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)
Condensation may form on the surface of the insulating
material.
Before refrigerant piping work, check which type of
refrigerant 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
refrigerant.
•
Apply ester oil or ether oil to the inside of 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
refrigerant 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.
• The outdoor unit is charged with refrigerant.
• Be sure to use both a spanner and torque wrench together,
as shown in the drawing, when connecting or disconnecting
pipes to/from the unit.
• 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.
• Refer to the Table 2 for the dimensions of flare nut spaces.
• When connecting the flare nut, coat the flare (inside only)
with ester oil or ether oil, rotate three or four times first, then
screw in.
• Refer to the Table 2 for tightening torque.
• Ventilate if refrigerant gas leaks while performing work.
Table 2
NOTE
The flare nuts used must be those included with the
main body.
Part to be procured in the field
Tighten from above and below
(Double nut)
Washer (Accessory)
B
B
Insulation material
(Accessory)
A-A cross-section
Hanger bracket
setting bolt
A
A
Vinyl tube
Hanger bracket setting bolt
Level
B-B cross-section
Pipe
size
Tightening torque
Flare
dimensions
A (mm)
Flare shape
φ
6.4
(1/4”)
14.2 – 17.2N·m
8.7 – 9.1
φ
9.5
(3/8”)
32.7 – 39.9N·m
12.8 – 13.2
φ
12.7
(1/2”)
49.5 – 60.3N·m
16.2 – 16.6
φ
15.9
(5/8”)
61.8 – 75.4N·m
19.3 – 19.7
A
45
0
±2
0
R0.4-0.8
90
0
±2
0
4PEN408655-1B_2016_02.book Page 4 Friday, February 19, 2016 1:33 PM
