Indoor Unit Installation; Refrigerant Piping Work - Mitsubishi Electric SEZ-KA35 Installationshandbuch

4. Indoor unit installation

A
B
Fig. 4-1
E
Fig. 4-2
a
Fig. 4-3
Fig. 4-4

5. Refrigerant piping work

1
SEZ-KA35:ø9.52
SEZ-KA50:ø12.7
SEZ-KA60:ø15.88
SEZ-KA71:ø15.88
Fig. 5-1
4
C D
G
F
c e
b
d
b
B
A
SEZ-KA35:ø6.35
SEZ-KA50:ø6.35
SEZ-KA60:ø6.35
SEZ-KA71:ø9.52
2
1 Indoor unit
2 Outdoor unit
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)
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
A
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.
Pipe
Model
For liquid
SEZ-
KA35VA For gas
For liquid
SEZ-
KA50VA For gas
For liquid
SEZ-
KA60VA For gas
For liquid
SEZ-
KA71VA For gas
(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.
Outside diameter
Min. wall Insulation
thickness thickness
mm inch
6.35 1/4 0.8 mm 8 mm
9.52 3/8 0.8 mm 8 mm
6.35 1/4 0.8 mm 8 mm
0.8 mm 8 mm
12.7 1/2
0.8 mm 8 mm
6.35 1/4
1.0 mm 8 mm
15.88 5/8
0.8 mm 8 mm
9.52 3/8
1.0 mm 8 mm
15.88 5/8
Insulation
material
Heat resisting
foam plastic
0.045 specific
gravity