Samsung AR07TSFABWKN, Руководство по обслуживанию, Страница: 121 / 137

Preference Sheet
Samsung Electronics 7-3
The outdoor unit is loaded with sufficient R-410A refrigerant.
Do not vent R-32 into atmosphere: it is a fluorinated greenhouse
gas, covered by Kyoto Protocol, with a Global Warming Potential
(GWP) = 2088.
You should purge the air in the indoor unit and in the pipe. If air
remains in the refrigerant pipes, it affects the compressor.
It may cause reduction of cooling capacity and malfunction.
Refrigerant for air purging is not charged in the outdoor unit.
Use Vacuum Pump as seen in the picture.
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 .
• 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-).
CAUTION
Model Name
Valve
3/8” 1/2”
AJ020BXJ2CH 1 1
AJ024BXJ3CH 1 2
AJ020BXS3CH 3 -
AJ024BXS4CH
2
2
AJ030BXS4CH
AJ036BXS4CH
AJ036BXJ4CH
AJ048BXJ5CH
3
3. Open the valve of the low pressure side of manifold gauge coun -
ter clockwise.
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)
Tightening torque
Body cap
(N · m)
Charging port cap
(N · m)
ø 6.35 20 to 25
10 to 12
ø 9.52 20 to 25
ø 12.70 25 to 30
ø 15.88 30 to 35
7-2 Connecting Up and Purging the Circuit
• When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first
before removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor works
with the service valve open, the pipe inhales the air and it makes the pressure inside of the refrigerant cycle
abnormally high. It may cause explosion and injury.
WARNING
Vacuum
Pump
Tightening torque for body cap
(Refer to the table)
Charging core
Tightening torque for charging
port cap (Refer to the table)
R-140A : Diameter of the screw-1/2-20UNF
Spindle
Vacuum
Pump
INDOOR A UNIT
INDOOR B UNIT
Tightening torque for body cap
(Refer to the table)
Spindle
Charging
core
R-410A : Thread of the screw -1/2-2OUNF
Tightening torque for charging port cap (Refer to the table)