Sunlight Supply Samsung Linesets for Mini Split Systems - Manual (Page 36)

36
Purging the connected pipes
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. Purge 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 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.
6. Set a valve cork of liquid and gas service port to the open position.
7. Mount the valve stem nuts and the service port cap to the valve, and tighten
them at the torque of 13.2ft.lb(183kgf.cm) with a torque wrench.
8. Check for a gas leak paying particular attention to the 3-way valve’s stem nuts
and to the service port cap (Refer to page 38).
Vacuum
Pump
Manifold gauge
Valve
Gas service port
Liquid service port
(Backward flowing
prevention)
• The remaining air in the Refrigeration cycle, which contains moisture, may cause malfunction on the compressor.
• Always contact the service center or a professional installation agency for product installation.
• Excessive torque can be cause of gas leakage.
B
(liquid)
Stem nut
Valve stem
A
(Gas)
Add refrigerant charge according to table below:
If you use a pipe longer than 24.6ft(7.5m),
‘A’g of refrigerant R410A must be added for each extra meter.
If you use a pipe shorter than 24.6ft(7.5m),
The purge time is normal.
Refer to the Service Manual for further details.
Adding Refrigerant
• 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 -).
Outer Diameter Torque
ø1/4inch(6.35mm)
10.1~12.3 ft.lb
(140~170 kgf.cm)
ø3/8inch(9.52mm)
18.1~20.3 ft.lb
(250~280 kgf.cm)
ø1/2inch(12.70mm)
27.5~30.4 ft.lb
(380~420 kgf.cm)
ø5/8inch(15.88mm)
31.8~34.7 ft.lb
(440~480 kgf.cm)
ø3/4inch(19.05mm)
71.6~87.5 ft.lb
(990~1210 kgf.cm)
ø7/8 inch(22.23mm)
71.6~87.5 ft.lb
(990~1210 kgf.cm)
Model A
 09/12/18/24 15
 36 40
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