20
Installation Procedure
English
Instal
lation Pr
oc
edur
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Step 8 Performing the gas leak test
Before completing the installation (insulation of the
cables, hose and piping and fixing of the indoor unit to the
installation plate), you must check that there are no gas
leaks.
To check for
gas leaks on
the...
Then, using a leak detector,check the ...
Outdoor unit
Valves on sections A and B.
Indoor unit
Flare nuts at the end of sections C and D.
C
D
Outdoor unit
B(Gas)
Indoor unit
A(Liquid)
• The designs and shape are subject to change
according to the model.
LEAK TEST WITH NITROGEN (before opening valves)
Pressure check the refrigerant system using high pressure
nitrogen in order to detect basic refrigerant leaks Before
performing the vacuum process and releasing the
factory R-410A charge into the refrigerant pipes, it is
the responsibility of the installer to pressurize the whole
system with nitrogen (using a cylinder with pressure
reducer) at a pressure above 580.2 psi (4 MPa) (gauge).
LEAK TEST WITH R-410A (after opening valves)
Before opening valves, discharge all the nitrogen into the
system and create vacuum. After opening valves check
leaks using a leak detector for refrigerant R-410A.
Once you have completed all the connections, check for
possible leaks using leak detector specifically designed for
HFC refrigerants.
Step 9 Adding refrigerant (R-410A)
Calculating the quantity of refrigerant to add
The quantity of additional refrigerant is variable according to
the installation situation. Thus, make sure the outdoor unit
situation before adding refrigerant.
If you install the excessive length of pipe, add additional
refrigerant as 0.11 oz or 0.22 oz per unit ft ; refer to the table
below.
Refer to the Service Manual for more details on this operation.
Model Name
Total connecting
pipe lengh (L)
Adding refrigerant
AJ036BXJ4CH
(LT) ft
≤131.2 ft
Chargeless
>131.2 ft
(LT-131.2) ft x 0.22 oz
(LT) m
≤ 40 m
Chargeless
> 40 m
(LT- 40) m x 20 g
AJ***CXS*CH
(LT) ft
≤164.0 ft
Chargeless
>164.0 ft
(LT-164.0) ft x 0.22 oz
(LT) m
≤ 50 m
Chargeless
> 50 m
(LT - 50) m x 20 g
AJ048BXJ5CH
(LT) ft
≤164.0 ft
Chargeless
>164.0 ft
(LT-164.0) ft x 0.11 oz
(LT) m
≤ 50 m
Chargeless
> 50 m
(LT - 50) m x 10 g
Charging the system with liquid refrigerant
R-410A is a mixed type of refrigerant. It is necessary for
recharging under conditions of liquid. When recharging
refrigerant from the refrigerant cylinder to the
equipment, follow the instructions below.
• Before recharging, check whether the cylinder has
a siphon or not. There are two ways to recharge the
refrigerant.
Cylinder with siphon
Cylinder without siphon
siphon
Charge the refrigerant standing
the cylinder upright.
Charge the refrigerant turning
the cylinder upside down.
DB68-12535A-00_IM_23Y FJM Outdoor_AA_EN_.indd 20
DB68-12535A-00_IM_23Y FJM Outdoor_AA_EN_.indd 20
2023-09-22 오후 1:46:57
2023-09-22 오후 1:46:57
