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Step 5 Taping the pipes, cables, and
drain hose
1 Wrap the refrigerant pipes with the provided
insulation. This wrapping minimises condensation.
Insulation
Refrigerant pipes
2 Wind the refrigerant pipes, power cable,
communication cable, and drain hose with vinyl tape
to make a pipe bundle.
Pipe insulator
Indoor/outdoor
unit
communication
cable
NOTE
∙ Be sure to insulate the pipes without gaps or cracks,
and use adhesive between the connecting parts of the
insulation to prevent moisture from entering.
∙ When bending the pipe, try to secure a large bending
radius (over 100 mm) to prevent the copper pipe
from distorting.
∙ Use the polyethylene or EPDM foam insulation with a
thickness over 7 mm.
∙ If pipes are installed in a place with humidity
over 80% (such as in a building site pit, basement,
seashore, near hot springs, or lakes), use an insulation
of a thickness over 10 mm.
∙ Make sure that the thickness of the insulation does
not get thinner on the pipe's bending area.
∙ When the insulation thickness becomes thinner, use
extra insulation to maintain thickness.
∙ When installing the pipe hanger, use extra PE- foam
insulation (over 5 mm) to make the width of the
insulation 3 times wider than the hanger. Do not use
cable ties as a pipe hanger.
Step 6 Connecting the refrigerant pipes
Items
Outdoor unit
models
Main pipe (L1)
Max. height
difference
between outdoor
and indoor units
(h1)
n=1
Outdoor
Vinyl tape
∙ Temper grade and minimum thickness of the
refrigerant pipe
Outer diameter
Drain hose
[mm]
ø6.35
ø9.52
ø12.70
ø15.88
ø15.88
ø19.05
ø22.23
Maximum allowable length
AF36MV1MAEEXTC AF48MV1MAEEXTC
50 m
75 m
30 m
30 m
L
1
Minimum
Temper grade
thickness [mm]
0.7
0.7
C1220T-O
0.8
1.0
0.8
C1220T-1/2H OR
0.9
C1220T-H
0.9
indoor
h
1
35
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