Samsung AQ24UGAN, AQ09UGDN Purging the Connected Pipes, With a Global Warming Potential GWP =

COMPLETING THE INSTALLATION

Purging the Connected Pipes

WARNING

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.

		The outdoor unit is loaded with sufficient R410A refrigerant.Do not vent R410A
		into atmosphere: it is a fluorinated greenhouse gas, covered by Kyoto Protocol,
		with a Global Warming Potential (GWP) = 1975.
		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.
Outdoor unit	Indoor unit	1	Connect each assembly pipe to the appropriate valve on the outdoor unit and
	Gas pipe side
			tighten the flare nut.
	Liquid pipe side	2	Tighten the flare nut first with your hands, and then with a torque wrench,
			applying the following torque:
				Outer Diameter	Torque (kgf•cm)
				ø6.35 mm	140~170
				ø9.52 mm	250~280
Manifold gauge				ø12.70 mm	380~420
				ø15.88 mm	440~480
				ø19.05 mm	990~1210
				ø22.23 mm	990~1210
Valve			Note	Excessive torque can be cause of gas leakage.
Gas service port		3 Connect the charging hose of the low-pressure side of manifold gauge to a
			gas service port as seen in the picture.
<Low pressure>
		4 Open the valve of the low pressure side of manifold gauge counterclockwise.
		5 Purge the air in the connected pipes using the vacuum pump for about
			15 minutes.
	Vacuum		- Make sure that pressure gauge shows -0.1MPa(-76cmHg) after about
			10 minutes.
	Pump
Liquid service port			This procedure is very important to avoid a gas leak.
	(Backward flowing
<High pressure>			- Close the valve of the low pressure side of manifold gauge clockwise.
	prevention)
			- Turn off the vacuum pump.
			- Check for 2 minutes if there is any pressure change.
			- Remove the hose of the low pressure side of manifold gauge.
	Valve stem	6 Set a valve cork of liquid and gas service port to the open position.
	Stem nut	7 Mount the valve stem nuts and the service port cap to the valve, and tighten
	A
			them at the torque of 183kgf•cm with a torque wrench.
	(Gas)
	B	8	Check for a gas leak paying particular attention to the 3-way valve’s stem nuts
	(liquid)		and to the service port cap (Refer to page 19).

E-18

Vivaldi_IM_30271A_E_11.07.09.indd 18

2009-11-7 13:57:13