Samsung AJ040TXJ2KG/EU Technical Data Book page 315

13. Installation
1 Check the piping connections.
2 Connect the charging hose of low pressure side of
manifold gauge to the packed valve having a service port .
Model Name
AJ040TXJ2KG
AJ050TXJ2KG
AJ052TXJ3KG
AJ068TXJ3KG
AJ080TXJ4KG
• If the valve diameter of indoor and outdoor unit are
different, please use Tube-connector.
CAUTION
• Make the electrical connection and leave the system
into "stand by mode". Do not turn on the system! This
is necessary for better vacuum operation (full OPEN
position of Electronic Expansion Valve - EEV -).
INDOOR A UNIT
INDOOR B UNIT
Tightening torque for body cap (Refer to
the table)
Charging
core
R-22: Thread of the screw - 7/16-2OUNF
R-410A/R-32: Thread of the screw -1/2-2OUNF
Tightening torque for charging port cap (Refer to the table)
3 Open the valve of the low pressure side of manifold
gauge counter clockwise.
※ In case you want more information about the controllers and accessories, please refer to the Controller and Accessory TDB
on pvi.Samsung.com site or Global Partner Portal site.
Valve
3/8'' 1/2''
2 -
2 1
1 2
2 2
Vacuum
Pump
Spindle
4 Purge the air from the system using vacuum pump for
about 30 minutes.
• Close the valve of the low pressure side of manifold
gauge clockwise.
• Make sure that pressure gauge show -0.1MPa(-
76cmHg) after about 1 hour. This procedure is very
important in order to avoid gas leak.
• Turn off the vacuum pump.
• Remove the hose of the low pressure side of
manifold gauge.
5 Set spindle of both liquid side and gas side of stop
valve to the open position.
6 Mount the valve stem nuts and the service port cap to
the valve, and tighten them with a torque wrench.
Outer diameter (mm)
Body cap (N•m)
ø 6.35
ø 9.52
ø 12.70
ø 15.88
Adding refrigerant (R-32)
Precautions on adding the R-32 refrigerant
In addition to the conventional charging procedure,. the
following requirements shall be kept.
• Make sure that contamination by other refrigerants does
not occur for charging.
• To minimize the amount of refrigerant, keep the hoses
and lines as short as possible.
• The cylinders shall be kept upright.
• Make sure that the refrigeration system is earthed before
charging.
• Label the system after charging, if necessary.
• Extreme care is required not to overcharge the system.
• Before recharging, the pressure shall be checked with
nitrogen blowing.
• After charging, check for leakage before commissioning.
• Be sure to check for leakage before leaving the work area.
Tightening torque
Charging port cap
(N•m)
20 to 25
20 to 25
10 to 12
25 to 30
30 to 35
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