En-9
Table. F (Between separation tube and indoor unit or RB unit and
indoor unit)
Indoor unit capacity
[Btu/h]
Outside diameter [in (mm)]
Liquid pipe Gas pipe
7,500 9,500
12,000 14,000
1/4 (6.35) 1/2 (12.70)
18,000 24000
30,000
3/8 (9.52) 5/8 (15.88)
36,000 48,000 3/8 (9.52) 3/4 (19.05)
60,000 3/8 (9.52) 3/4 (19.05)
Table. G (Separation tube / Header)
• Separation tube
Total cooling capacity
of indoor unit [Btu/h]
Separation tube
*5
for 2 pipes for 3 pipes
x < 66,000
UTP-AX054A, UTP-AX090A or
UTR-BP090X
UTP-BX090A
66,000 ≤ x < 96,500 UTP-AX090A or UTR-BP090X
96,500 ≤ x < 193,000 UTP-AX180A or UTR-BP180X UTP-BX180A
193,000 ≤ x UTP-AX567A or UTR-BP567X UTP-BX567A
• Header
Total cooling
capacity of indoor
unit [Btu/h]
Header
*5
for 2 pipes for 3 pipes
3-6 Branches 3-8 Branches 3-6 Branches 3-8 Branches
x < 96,500 UTR-H0906L UTR-H0908L UTP-J0906A UTP-J0908A
96,500 ≤ x < 193,000 UTR-H1806L UTR-H1808L UTP-J1806A UTP-J1808A
*5. For the installation method, refer to the section on "Indoor unit pipe connections"
below.
Indoor unit model codes and model selection capacity
Model code 07 09 12 14 18
Indoor unit capacity
[Btu/h]
7,500 9,500 12,000 14,000 18,000
Model code 24 30 36 48 60
Indoor unit capacity
[Btu/h]
24,000 30,000 36,000 48,000 60,000
• Outdoor air unit
Connectable unit within 1 refrigerant system
Unit
Connectable cooling
capacity range
Remarks
Only Outdoor air unit 50% to 100% -
Outdoor air unit
+ Indoor unit
50% to 100%
The capacity of "Outdoor air
unit" should be less than 30%
of the outdoor unit capacity.
4. 3. Protection of pipes
• Protect the pipes to prevent the entry of moisture and dust.
• Especially pay attention when passing the pipes through a hole or connecting the
end of a pipe to the outdoor unit.
Location Working period
Protection method
Outdoor
1 month or more Pinch pipes
Less than 1 month Pinch or tape pipes
Indoor
—
Pinch or tape pipes
5. PIPE INSTALLATION
5. 1. Brazing
CAUTION
If air or different type of refrigerant enters
the refrigeration cycle, the internal pres-
sure in the refrigeration cycle will become
abnormally high and prevent the unit from
exerting its full performance.
Fig.
Pressure regulating valve
Brazing area
Nitrogen gas
Cap
Apply nitrogen gas while brazing the
pipes.
Nitrogen gas pressure: 2.9 psi (0.02 MPa)
(= suffi cient pressure to be felt on the
back of your hand or more)
If a pipe is brazed without applying nitrogen gas, it will create an oxidation fi lm.
This can degrade performance or damage the parts in the unit (such as the com-
pressor or valves).
Do not use fl ux to braze pipes. If the fl ux is the chlorine type, it will cause the pipes
to corrode.
In addition, if the fl ux contains fl uoride, it will affect the refrigerant piping system due to
deterioration of refrigerant oil.
For brazing material, use phosphor copper that does not require fl ux.
5. 2. Indoor unit pipe connections
CAUTION
For details, refer to the Installation Instruction Sheet of each part.
Separation tube
A
B
A
B
B
A
GOOD
Horizontal
Vertical
Horizontal line
or
± 15°
A : Outdoor unit or Refrigerant branch kit
B : Indoor unit or Refrigerant branch kit
PROHIBITED
Header
C
H
1
A
1
B
1
D
H
2
A
2
B2
GOOD
Horizontal line
Horizontal
line
VIEW D
VIEW C
Horizontal
line
Vertical
line
Gas pipe
Liquid pipe
Outdoor
unit side
Outdoor
unit side
H
1
= 0 to 3/8 in
(0 to 10 mm)
H
2
= 0 to 3/8 in
(0 to 10 mm)
PROHIBITED PROHIBITED
(α
1
: 0° to 1°)
β
1
: -10° to 10°
(α
2
: 0° to 1°)
β
2
: -10° to 10°
CAUTION
Do not connect a separation tube after a header.
Leave the distance 2 ft (0.5 m) or more for straight part to branch tube and header.
Main pipe
2 ft
(0.5 m) or more
To indoor unit
To indoor unit
To indoor unit
Main pipe
2 ft
(0.5 m) or more
To indoor
unit
Separation tube
or
Header
2 ft
(0.5 m) or more
2 ft
(0.5 m) or more
To indoor unit
or
Header
Separation tube
To indoor
unit
9378945159-04_IM.indb 99378945159-04_IM.indb 9 2015/12/1 10:50:542015/12/1 10:50:54
To Next Page
Loading...
