Installation Manual
– 14 –
EN
REQUIREMENT
• For a brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the inside of
the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.
• Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not
contaminate the refrigerant.
* Remove all flux after brazing.
• Be sure to use a double spanner to loosen or tighten the flare nut. If a single spanner is used, the required level of
tightening cannot be obtained. Tighten the flare nut with the specified torque.
• Do not apply refrigerant oil to the surface of the flare.
Coupling size of brazed pipe
(Unit: mm)
Connected section
External size
Internal size
Standard outer dia. of
connected copper
pipe
Connected section
Min. thickness of
coupling
External size
Internal size
Min. depth of
insertion
Oval value
Standard outer dia.
(Allowable difference)
C
F
K
G
6.35
6.35 (±0.03)
6.45 (
)
7
6
0.06 or less
0.50
9.52
9.52 (±0.03)
9.62 (
)
8
7
0.08 or less
0.60
12.70
12.70 (±0.03)
12.81 (
)
9
8
0.10 or less
0.70
15.88
15.88 (±0.03)
16.00 (
)
9
8
0.13 or less
0.80
19.05
19.05 (±0.03)
19.19 (
)
11
10
0.15 or less
0.80
22.22
22.22 (±0.03)
22.36 (
)
11
10
0.16 or less
0.90
K
ØC
G
ØF
+0.04
-0.02
+0.04
-0.02
+0.04
-0.02
+0.04
-0.02
+0.04
-0.02
+0.03
-0.03
Selection of pipe materials and size
Selection of pipe material
Material: Phosphorus deoxidation seam-less pipe
Capacity code of indoor and outdoor units
• For the indoor unit, the capacity code is decided at each capacity rank.
• The capacity codes of the outdoor units are decided at each capacity rank.
The maximum No. of connectable indoor unit and the total value of capacity codes of the indoor units are also decided.
Minimum wall thickness for R410A application1 If the pipe size is Ø19.05, use a suitable material.
*1 If the pipe size is Ø19.05, use a suitable material.
Table 1
Table 2
Soft
Half Hard or Hard
OD (Inch)
OD (mm)
Minimum wall thickness (mm)
Correct
Correct
1/4”
6.35
0.80
Correct
Correct
3/8”
9.52
0.80
Correct
Correct
1/2”
12.70
0.80
Correct
Correct
5/8”
15.88
1.00
Incorrect *
1
Correct
3/4”
19.05
1.00
Incorrect *
1
Correct
7/8”
22.22
1.00
Indoor unit
capacity type
Capacity code
Indoor unit
capacity type
Capacity code
Equivalent to HP
Equivalent to
capacity
Equivalent to HP
Equivalent to
capacity
005 type
0.6
1.7
018 type
2.0
5.6
007 type
0.8
2.2
020 type
2.25
6.3
008 type
0.9
2.5
024 type
2.5
7.1
009 type
1.0
2.8
027 type
3.0
8.0
010 type
1.1
3.2
030 type
3.2
9.0
012 type
1.25
3.6
036 type
4.0
11.2
014 type
1.5
4.0
048 type
5.0
14.0
015 type
1.7
4.5
056 type
6.0
16.0
017 type
1.85
5.0
Outdoor unit
capacity type
Capacity code
No. of connetable
indoor units
Total capacity code of connectable indoor units
Equivalent to HP
Min. (HP)
Max. (HP)
0806 type
8
2 to 12
6.4
10.4
1006 type
10
2 to 16
8.0
13.0
(When the number of indoor units is 2 to 12)
11.0
(When the number of indoor units is 13 to 16)
EN-27
EN-28
2FAN_IM_DB04307201-04_EN.book Page 14 Tuesday, December 17, 2019 6:34 PM
