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1. Cut out the appropriate knock-out piece (A, B, C)
on the rear of the indoor unit unless you connect
the pipe directly from the rear.
2. Smooth the cut edges.
3. Remove the protection caps of the pipes and
connect the assembly pipe to each pipe. Tighten
the nuts first with your hands, and then with a
torque wrench, applying the following torque:
Outer diameter (mm) Torque (N•m)
ø 6.35
ø 9.52
ø 12.70
ø 15.88
NOTE
• If you want to shorten or extend the pipes, see
Step 2.9 Shortening or extending the refrigerant
pipes (assembly pipe) on page 37.
4. Cut off the remaining foam insulation.
5. If necessary, bend the pipe to fit along the bottom
of the indoor unit. Then pull it out through the
appropriate hole.
• The pipe should not project from the rear of the
indoor unit.
• The bending radius should be 100 mm or more.
6. Pass the pipe through the hole in the wall.
NOTE
• The pipe will be insulated and fixed permanently
into position after finishing the installation and
the gas leak test. For further details. see Step 4.1
Performing the gas leak tests on page 43.
CAUTION
• Tighten the flare nut with a torque wrench according
to specified method. If the flare nut is over-
tightened, the flare may break and cause refrigerant
gas leakage.
• Do not box in or cover the pipe connection.
All refrigerant pipe connection must be easily
accessible and serviceable.
DB68-06031A-01_A5.indd 37
Torque (kgf•cm)
14 to 18
140 to 180
34 to 42
350 to 430
49 to 61
500 to 620
68 to 82
690 to 830
Step 2.9 Shortening or extending the
refrigerant pipes (assembly pipe)
90°
Oblique
D
A
Pipe
Flare
Outer diameter (D)
Depth (A)
ø 6.35
1.3
ø 9.52
1.8
ø 12.70
2.0
ø 15.88
2.2
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
Pipe cutter
Pipe
Rough
Burr
90°±2°
45°±2°
L
R 0.4 to 0.8
D
(Unit: mm)
Flare dimension (L)
8.7 to 9.1
12.8 to 13.2
16.2 to 16.6
19.3 to 19.7
Flare nut
Connecting pipe
Torque (kgf•cm)
140 to 180
350 to 430
500 to 620
690 to 830
English
37
4/18/2017 8:59:59 AM
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