4. Installing
the outdoor
unit
(inch)
• Be sure to install the unit in a sturdy, level surface to prevent rattling noises dur-
ing operation.
(Fig. 4-1 )
<Foundation
specifications>
Foundation bolt
M10 (3/8")
Thickness
of concrete
120 mm (4-23/32")
Length of bolt
70 mm (2-3/4")
Weight-bearing
capacity
320 kg (705 Ibs)
®
@ M3/8 (M10) bolt
@ Base
© As long as possible.
© Vent
® Setdeep inthe ground
I
23-5/8
Min. 14-6/32
23-5/8
L
L ±
!
M in. 13/32
6_7/8
6-7/8 _
3g- 1 3/32
Fig. 4-1
5. Installing
the refrigerant
piping
• Make sure that the length of the foundation
bolt is within 30 mm (1-3/16") of the
bottom surface of the base.
• Secure the base of the unit firmly with four-M10 foundation
bolts in sturdy loca-
tions.
Installing
the outdoor
unit
• Do not block the vent. If the vent is blocked, operation will be hindered and break-
down may result.
• In addition to the unit base, use the installation
holes on the back of the unit to at-
tach wires, etc., if necessary
to install the unit. Use self-tapping
screws (_5 x 15
mm, e13/16" x 19/32" or less) and install on site.
z_ Warning:
• The unit
must
be securely
installed
on a structure
that can sustain
its
weight.
If the unit is mounted
on an unstable
structure,
it may fall down
and cause
damage
or injuries.
• The unit
must
be installed
according
to the instructions
in order
to mini-
mize the risk of damage
from
earthquakes,
typhoons,
or strong
winds.
An
incorrectly
installed
unit may fall down and cause damage
or injuries.
@ Outdoor unit
® Branch box
® It_oor unit
.I hi
ai! !
a_[___
.._L_
_
._F_!_
.......
i]i..........
Fig. 5-1
5.1. Precautions for devices that use R410A refrigerant
• Refer to page 3 for precautions
not included
below on using air conditioners
with
R410A refrigerant.
• Use ester oil, ether oil, alkylbenzene
oil (small amount) as the refrigeration
oil ap-
plied to the flared sections.
• Use C1220 copper phosphorus,
for copper and copper alloy seamless
pipes, to
connect the refrigerant pipes. Use refrigerant
pipes with the thicknesses
specified
in the table to the below. Make sure the insides of the pipes are clean and do not
contain any harmful contaminants
such as sulfuric compounds,
oxidants, debris,
or dust.
Z_ Warning:
When installing or moving
the air conditioner,
use only the specified
refriger-
ant (R410A) to charge
the refrigerant
lines. Do not mix it with
any other refrig-
erant
and do not allow air to remain
in the lines. Air enclosed
in the lines can
cause pressure
peaks resulting
in a rupture
and other
hazards.
_6.35 mm (1/4 inch),
_9.52 mm (3/8 inch), Thickness
0.8 mm (1/32 inch)
_12.7 mm (1/2 inch)
_15.88 (5/8 inch)
Thickness
1.0 mm (5/128 inch)
• Do not use pipes thinner than those specified
above.
Permissible
length
(one-way)
Total piping length
Farthest piping length (L)
Piping length between outdoor unit and branch boxes
Farthest piping length after branch box (I)
Total piping length between
branch boxes and indoor units
In indoor/outdoor
section (H) "1
Permissible
height difference
In branch box/indoor
unit section (hl)
(one-way)
In each branch unit (h2)
In each indoor unit (h3)
Number of bends
"1 Branch box should be placed within the level between the outdoor unit and indoor units.
b1+b2+a1+a2+a3+a4+a5+a6+a7+a8<115m(377ff.)
b2 + a8 < 70 m (230 ft.) (b2 < 55 m (180 ft.), a8 < 15 m (49 ft.))
bl + b2 < 55 m (180 ft.)
a8 < 15 m (49 ft.)
a1+a2+a3+a4+a5+a6+a7+a8<60m(197ft.)
H < 30 m (98 ft.) (In case of outdoor unit is set higher than indoor unit)
H < 20 m (66 ft.) (In case of outdoor unit is set lower than indoor unit)
h1+h2<15m(49ft.)
h2 < 15 m (49 ft.)
h3 < 12 m (39 ft.)
I bl+al
I, I bl+a2 I, I bl+a3 I, I bl+a4 I, I bl+a5 I, I b2+a6 I, I b2+a7 I, I b2+a8 I < 15
5.2. Pipe length and height difference (Fig. 5-1)
Flared connections
• This unit has flared connections
on each indoor unit and branch box and outdoor unit sides.
• Remove the valve cover of the outdoor unit, then connect the pipe.
• Refrigerant
pipes are used to connect the branch box and outdoor unit.
6