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English-54
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
Gaspipeside
Liquid pipe side
• Excessivetorquecanbecauseofgasleakage.
• Maketheelectricalconnectionandleavethesysteminto“standby
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 -0.1MPa(-76cmHg) 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
Gasserviceport
<Low pressure>
Liquid service port
<High pressure>
(Backward flowing
prevention)
• TheremainingairintheRefrigerationcycle,whichcontainsmoisture,maycausemalfunctiononthecompressor.
• Alwayscontacttheservicecenteroraprofessionalinstallationagencyforproductinstallation.
Addrefrigerantchargeaccordingtotablebelow:
If you use a pipe longer than 7.5m,
‘A’gofrefrigerantR-410Amustbeaddedforeachextrameter.
If you use a pipe shorter than 7.5m,
The evacuating time is normal.
Refer to the Service Manual for further details.
Adding Refrigerant
Model A
09/12
15
18/24
15
30
40
Outer
Diameter
Torque
N•m kgf•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
A3050 Australia_IB&IM_DB68-05206A_EN.indd 54 2014/12/29 19:07:43
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