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Installation Procedure
Step 9 Insulating the refrigerant pipes
Once you have checked that there are no leaks in the
system, you can insulate the piping and hose.
1 To avoid condensation problems, place Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
No gap
NOTE
• Always make the seam of pipes face upwards.
2 Wind insulating tape around the pipes and drain hose
avoiding compressing the insulation too much.
Indoor unit
CAUTION
• Be sure to wrap insulation tightly without any gaps.
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 The pipes and electrical cables connecting the indoor
unit with the outdoor unit must be fixed to the wall
with suitable ducts.
CAUTION
• Make sure that all refrigerant connection must be
accessible for easy maintenance and detachment.
• Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
• Wind the refrigerant pipe with insulation tape if it is
exposed to outside sunlight.
12
English
NBR
Insulation cover pipe
Insulation pipe
Be sure to overlap the insulation.
• Install the refrigerant pipe respecting that the
insulation does not get thinner on the bent part or
hanger of pipe.
• Add the additional insulation if the insulation plate
gets thinner.
Additional insulation
5 Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe, noting the
insulation thickness that must differ according to
the pipe size.
• Standard: Less than an indoor temperature of 30°C,
with humidity at 85%. If installing in a high humidity
environment, use one grade thicker insulator by
referring to the table below. If installing in an
unfavourable environment, use thicker one.
• The heat-resistance temperature of the insulator
must be more than 120°C.
Insulation type
(heating/cooling)
Standard
Pipe size
Pipe
(Less than
(mm)
30°C,
85%)
EPDM, NBR
Ø6.35 to
9t
Ø9.52
Liquid
pipe
Ø12.7 to
13t
Ø19.05
Ø6.35
13t
Ø9.52
Gas
Ø12.70
pipe
19t
Ø15.88
Ø19.05
• When installing insulation in the places and
conditions below, use the same insulation that is
used for high humidity conditions.
Hanger
a
Refrigerant pipe
insulation
a x 3
High
humidity
Remarks
(Over 30°C,
85%)
9t
13t
The internal
temperature
19t
is higher than
120°C.
25t
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