Fujitsu AJYA36LALH - Piping Protection and Connections; Pipe Brazing Procedure; Connecting Refrigerant Pipes

En-6
E (Indoor unit capacity comparison table - The indication of power is dif-Table.
ferent depending on the model.)
Capacity [kW] Model code of indoor unit
2.2 07
2.8 09
3.6 12
4.5 14
5.6 18
7.1 24
9.0 30
11.2 36
12.5 45
14.0 54
In the case of ARXB07LALH: equivalent to model code of indoor unit
Model code 07 → Capacity=2.2kW
Protection of pipes4. 3.
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
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.
PIPE INSTALLATION5.
Brazing5. 1.
CAUTION
If air or another type of refrigerant
enters the refrigeration cycle, the
internal pressure in the refrigera-
tion cycle will become abnormally
high and prevent the unit from
exerting its full performance.
Pressure regulating valve
Cap
Fig.
Nitrogen gas
Brazing area
Apply nitrogen gas while brazing the pipes.
Nitrogen gas pressure: 0.02 MPa (= pressure felt suffi ciently on the back of your
hand)
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 compres-
sor 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 additio
n, 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.
Indoor unit pipe connections5. 2.
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
A2
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 10 mm
H
2
= 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 0.5 m or more for straight part to branch tube and
header.
Main pipe
0.5 m or more
To indoor unit
To indoor unit
To indoor unit
Main pipe
0.5 m or more
To indoor
unit
Separation tube
or
Header
0.5 m or more
0.5 m or more
To indoor unit
or
Header
Separation tube
To indoor
unit
9380545026-02_IM.indb 69380545026-02_IM.indb 6 19/08/2013 17:19:2619/08/2013 17:19:26