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FINAL INSTALLATION PROCEDURES
Refrigerant Trim Charge, Finishing the Job
Refrigerant Trim Charge
The single zone system will need an additional refrigerant charge if the installed piping lengths are greater than the "piping length (no
additional refrigerant, ft.) specification" listed in the product tables. See the product sections in the engineering and installation manuals. The
additional refrigerant charge can be calculated manually using the information in the engineering and / or installation manuals, or by LATS.
1. Keep the outdoor unit service values closed while adding the trim charge to the system. See the specification tables in the front of this
installation manual for base charge, and see below for the correct additional refrigerant trim charge amounts for each system.
2. Charge through just the gas (vapor) suction Schrader port.
• Follow all guidelines when handling refrigerant.
•
Never inhale or handle refrigerant directly. Doing so will cause bodily injury.
Table 19: Single Zone High Ef ciency Refrigerant Piping System Additional Refrigerant Charge.
Model Numbers
LS090HSV5
(LSN090HSV5 / LSU090HSV5)
LS120HSV5
(LSN120HSV5 / LSU120HSV5)
LS180HSV5
(LSN180HSV5 / LSU180HSV5)
• Capacity is based on standard length.
• Equivalent Pipe Length = Actual Pipe Length + Number of Bends x 0.3.
• Additional Refrigerant Charge Calculation : X (g) = [ (Refrigerant Pipe Length) - (No Charge Pipe Length) ] × (Additional Refrigerant).
•
Finishing the Job
After the Triple Leak and Evacuation (and refrigerant trim charge, if any) procedures have been performed, follow the steps below to open
the refrigerant lines.
1. Verify that the auxiliary service port is removed (if used in the Evacuation procedure) and the original Schrader core was re-installed on
the gas (vapor) suction service port.
2. The service ports are a back-seated type with a right hand thread. Remove the service valve caps on both the gas (vapor) suction and the
liquid service ports.
3. Using an appropriately sized Allen wrench, fully open the valves on both the gas (vapor) suction and the liquid service ports by turning the
valve stem counterclockwise.
4. Turn until the valve stem is out, stops, and the valve is completely backseated.
5. Securely replace service port caps on both the gas (vapor) suction and the liquid using an adjustable wrench.
58
16.4
24.6
0
0
Additional
Refrigerant
0
0
Charge (oz.)
0
0
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Refrigerant Piping Length (ft.)
32.8
41.0
49.2
65.6
0
0
1.8
5.4
0
0
1.8
5.4
3.1
6.2
9.3
15.6
Do not apply excessive force.
82.0
98.4
114.8 131.2 147.6 164.0
9.0
-
-
-
9.0
-
-
-
21.8
28.0
34.3
-
-
-
-
-
-
-
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