Samsung AR18JVSSAWKNED User Manual

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•Wheninstalling,makesurethereisnoleakage.Whenrecoveringtherefrigerant,groundthecompressorrst

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.

Evacuating the connected pipes

1. Connect each assembly pipe to the appropriate valve on the outdoor unit

and tighten the are nut.

2. Tighten the are nut rst with your hands, and then with a torque wrench,

applying the following torque.

Outdoor unit Indoor unit

Gas pipe side

Liquid pipe side

•Excessivetorquecanbecauseofgasleakage.

•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 -).

3. Connect the charging hose of the low-pressure side of manifold gauge to a

gas service port as seen in the picture.

4. Open the valve of the low pressure side of manifold gauge counterclockwise.

5. Evacuate the air in the connected pipes using the vacuum pump for about

15 minutes.



Make sure that pressure gauge shows -0.1MPa(-76cmHg) after about

10 minutes.

This procedure is very important to avoid a gas leak.



Close the valve of the low pressure side of manifold gauge clockwise.



Turn o the vacuum pump.



Check for 2 minutes if there is any pressure change.



Remove the hose of the low pressure side of manifold gauge.

6. Set a valve cork of liquid and gas service port to the open position.

Vacuum

Pump

Manifold gauge

Valve

Gas service port

Liquid service port

(Backward flowing

prevention)

Outer

Diameter

Torque

N•mkgf•cm

ø6.35 mm

14~18 140~180

ø9.52 mm

34~42 350~430

ø12.70 mm

49~61 500~620

ø15.88 mm

68~82 690~830

The outdoor unit is loaded with sucient R-410A refrigerant. Do not vent R-410A into atmosphere: it is a uorinated

greenhouse gas, covered by Kyoto Protocol, with a Global Warming Potential (GWP) = 2088.

You should evacuate the air in the indoor unit and in the pipe. If air remains in the refrigerant pipes, it aects the compressor.

It may cause reduction of cooling capacity and malfunction. Use Vacuum Pump as seen in the picture.

English-48

AR5000 ED CO_IB&IM_DB68-05069A_EN.indd 48 2015/3/20 16:15:04

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Samsung AR18JVSSAWKNED AR5500 Wall-mount with 38% Fast Cooling, 18,000 Btu/hr

User Manual - Page 48