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Indoor Unit Installation
Step 2.9 Optional: Installing DPM
• When installing DPM,you should set "DPM setting" to
the outdoor unit.
• If DPM model is not set,communication error may
occur.
• While the outdoor unit is tracking the indoor unit for
one minute after the power supply is turned on.the
operation may stop if the remote control reception
signal of the installed indoor unit is different.
• When DPM is installed, Automatic Air-Volume
function cannot be performed simultaneously for all
indoor units. Automatic Air-Volume function must be
performed for each indoor unit with the wired remote
control attached.
Step 2.10 Shortening or extending the
refrigerant pipes (assembly pipe)
Oblique
90°
D
Pipe
Flare
Outer diameter (D)
ø 6.35
ø 9.52
ø 12.70
ø 15.88
14 English
Pipe cutter
Pipe
Rough
Burr
90°±2°
A
45°±2°
L
R 0.4 to 0.8
D
(Unit: mm)
Depth (A)
Flare dimension (L)
1.3
8.7 to 9.1
1.8
12.8 to 13.2
2.0
16.2 to 16.6
2.2
19.3 to 19.7
Indoor outlet pipe
Outer diameter (mm) Torque (N•m)
ø 6.35
14 to 18
ø 9.52
34 to 42
ø 12.70
49 to 61
ø 15.88
68 to 82
CAUTION
• If you need a pipe longer than specified in piping
codes and standards, you must add refrigerant to the
pipe. Otherwise, the indoor unit may freeze.
• While removing burrs, put the pipe face down to make
sure that the burrs do not get in to the pipe.
Liquid service port
<High pressure>
Correct
Inclined
Cracked
<Flare nut>
Flare nut
Connecting pipe
(Unit: mm)
Torque (kgf•cm)
140 to 180
350 to 430
500 to 620
690 to 830
Gas service port
<Low pressure>
Uneven
Damaged
thickness
surface
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