4
4. Indoor unit installation
4.1. Suspension Structure (Give site of suspension
strong structure.)
4.1.1. Wooden structure (Fig. 4-1)
• Select tie beam (one-story houses) or second-floor girder (two-story houses) as
reinforcement member.
• Use sturdy beams of at least 6 cm square for beam pitch of 90 cm or less or of at
least 9 cm square for beam pitch of 90-180 cm.
A
Ceiling
B
Rafter
C
Beam
D
Roof beam
4.1.2. Ferroconcrete structures (Fig. 4-2)
Secure the suspension bolts using the method shown, or use steel or wooden hang-
ers, etc. to install the suspension bolts.
E
Use inserts rated at 100-150 kg each (procure locally)
F
Suspension bolts M10 (3/8") (procure locally)
G
Steel reinforcing rod
4.1.3. Installing the suspension bolts
• Check the pitch of the suspension bolts.
• Use the ø10 (3/8") suspension bolts (
×
4, procure locally).
• Adhere strictly to the length of the suspension bolts.
4.2. Suspending the unit (Fig. 4-3)
Direct suspension method:
Raise the unit and line it up with the suspension bolts, then secure it using both
nuts.
a
Air outlet
b
Air intake (selecting the either back side or bottom side.)
c
Washer (procure locally)
d
Nuts (procure locally)
e
Suspension bolts (procure locally)
G
E
F
a
b
b
c
e
d
B
A
A
A
B
C D
350
1070
Fig. 4-1
Fig. 4-3
Fig. 4-4
Fig. 4-2
4.3. Transportation support removal (Fig. 4-4)
After installation, completely remove the transportation support because this part
should only be used during transportation.
A
3 screws
B
Transportation support
5. Refrigerant piping work
5.1. Refrigerant pipe (Fig. 5-1)
Piping preparation
• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.
(1) Table below shows the specifications of pipes commercially available.
(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 10 cm or more.
Caution:
Using careful insulation of specified thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.
Fig. 5-1
1
Indoor unit
2
Outdoor unit
Pipe
For liquid
For gas
For liquid
For gas
For liquid
For gas
For liquid
For gas
Outside diameter
mm
inch
6.35
1/4
9.52
3/8
6.35
1/4
12.7
1/2
6.35
1/4
15.88
5/8
9.52
3/8
15.88
5/8
Model
SEZ-
KA35VA
SEZ-
KA50VA
SEZ-
KA60VA
SEZ-
KA71VA
Insulation
material
Heat resisting
foam plastic
0.045 specific
gravity
Insulation
thickness
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
Min. wall
thickness
0.8 mm
0.8 mm
0.8 mm
0.8 mm
0.8 mm
1.0 mm
0.8 mm
1.0 mm
SEZ-KA35:ø9.52
SEZ-KA50:ø12.7
SEZ-KA60:ø15.88
SEZ-KA71:ø15.88
SEZ-KA35:ø6.35
SEZ-KA50:ø6.35
SEZ-KA60:ø6.35
SEZ-KA71:ø9.52
1
2
