Refrigerant Trim Charge - LG LA090HYV3 Installation Manual

FINAL INSTALLATION PROCEDURES

Refrigerant Trim Charge

Refrigerant Trim Charge
A single zone system could 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 system must have the right
amount of refrigerant; if the amount of refrigerant level is low, the system will not perform properly.
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 valves closed while adding the trim charge to the system. Charge
through the Schrader port. See specification tables in the front of this installation manual for
base charge, and see below (or the LATS report) for the correct additional refrigerant trim charge
amounts for each system.
2. Connect the gauge manifold hose to the gas (vapor) suction Schrader port on the gas service
valve.
3. Connect the gauge manifold hose to the refrigerant cylinder. These systems use R410A refrig-
erant, which must be charged in the liquid state. Verify that the R410A refrigerant cylinder is
upsidedown.
4. Open both the vapor (gas) and the liquid service valves on the outdoor unit. To open, rotate the
valves counter-clockwise by using an Allen wrench.
5. Charge the refrigerant by adjusting the low-pressure valve of the gauge manifold. See the "Sug-
gested Amount of Refrigerant Charge" below, or on the LATS report.
6. After the correct amount of additional refrigerant is charged, close the low-pressure valve of the
gauge manifold, and remove the low-pressure hose from the outdoor unit.
•
• Follow all local, state, and federal guidelines when handling refrigerant. If all regulations are not
Table 19: Single Zone Art Cool Premier Refrigerant Piping System Additional Refrigerant Charge.
Model Numbers
LA090HYV3
(LAN090HYV3 / LAU090HYV3)
LA120HYV3
(LAN120HYV3 / LAU120HYV3)
LA150HYV3
(LAN150HYV3 / LAU150HYV)
LA180HYV3
(LAN180HYV3 / LAU180HYV3)
LA240HYV3
(LAN240HYV3 / LAU240HYV3)
• Capacity is based on standard length.
• Equivalent Pipe Length = Actual Pipe Length + Number of Bends x 0.3.
•
• There is no need to add refrigerant if equivalent pipe is less than the "piping length with no additional refrigerant" in the table above.
64
16.4 24.6
0 0
0 0
Additional
Refrigerant 0 0
Charge (oz.)
0 0
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 (feet)
32.8 41 49.2 65.6
1.8 3.6 5.4 9.0
1.8 3.6 5.4 9.0
3.1 6.2 9.3 15.6
3.1 6.2 9.3 15.6
3.1 6.2 9.3 15.6
Figure 114: Gauge Manifold Hose
Connected to the Schrader Valve on the
Gas (Vapor) Service Port.
Gauge Manifold
Figure 115: Opening the Outdoor Unit
Service Valves Counter-clockwise.
Figure 116: Charging the R410A Refrig-
erant.
Gauge Manifold
82 98.4 114.8 131.2 147.6 164.0
- - - -
- - - -
21.8 28.0 34.3 40.5
21.8 28.0 34.3 40.5
21.8 28.0 34.3 40.5
Micron
Gauge
Micron
Gauge
- -
- -
46.7 53.0
46.7 53.0
46.7 53.0