23
Installation Procedure
Step 9 Performing the gas leak test
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating
the vacuum and recirculating the R-410A, it is the
responsibility of the installer to pressurize the whole system
with nitrogen (using a cylinder with pressure reducer) at a
pressure above 0.2MPa, less than 4MPa (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.
• AC018BXADCH
A(Gas)
B(liquid)
• AC024/030/036/042/048BXADCH
B(liquid)
A(Gas)
• The designs and shape are subject to change
according to the model.
Step 10 Adding refrigerant (R-410A)
The outdoor unit is loaded with sufficient refrigerant for
the standard piping. Thus, refrigerant must be added if the
piping is lengthened. This operation can only be performed
by a qualified refrigeration specialist. To determine the
quantity of refrigerant charge, see Calculating the quantity
of refrigerant to add on page 24.
• AC018BXADCH
1 Open the liquid stop valve and gas stop valve.
2 Operate the air conditioner by pressing the K2 button
on the outdoor unit PCB.
3 After about 30 minutes, charge the refrigerant
through the service port of the gas stop valve.
Balance
Vacuum
Pump
Indoor Unit
Ref
Gas side stop valve
(service port)
Liquid side stop valve
(Non-service port)
• AC024/030/036/042/048BXADCH
1 Check if the stop valve is closed completely.
2 Charge the refrigerant through the service port of the
liquid stop valve.
NOTE
• Do not charge the refrigerant through the service port
of the gas stop valve.
DB68-11274A-00_IM_CAC Universal Outdoor_AA_EN.indd 23DB68-11274A-00_IM_CAC Universal Outdoor_AA_EN.indd 23 2021-09-14 오전 9:22:002021-09-14 오전 9:22:00
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