ENGLISH
5
Preparing the installation
Please check if items below are included in installation accessories.
Selecting the refrigerant pipe for installation
The design pressure of MCU for R-410A is about 4.1 MPa. For safe use of the product, please refer to the table below in selecting
the installation pipe.
Name
Insulation
(for pipe)
Insulation
(for base)
Installation
manual
Pattern
sheet
Cable tie
Pipe
socket
Drain
socket
Shape
Name
Y-connector [Ø9.52mm(3/8") ,Ø15.88mm(5/8")
(Except MCU-S2NEK1N)]
Shape
Accessories
• For pipes larger than Ø 19.05mm(3/4"), drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be used.
If an annealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and cause
personal injury.
Outer diameter Minimum thickness
Temper grade
mm inch mm inch
6.35 1/4 0.70 0.028
Annealed
9.52 3/8 0.70 0.028
12.70 1/2 0.80 0.031
15.88 5/8 1.00 0.039
19.05 3/4 0.90 0.035
Drawn
22.22 7/8 0.90 0.035
25.40 1 1.00 0.039
28.58 1 1/8 1.10 0.043
31.75 1 1/4 1.10 0.043
34.92 1 3/8 1.21 0.048
38.10 1 1/2 1.35 0.053
41.28 1 5/8 1.43 0.056
44.45 1 3/4 1.60 0.063
50.80 2 2.00 0.079
53.98 2 1/8 2.10 0.083
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