Piping And Wiring For Outdoor Unit; Refrigerant Piping; Constraints In Pipe Length And Elevation - LG Therma V Series Installation Manual

6. Piping and Wiring for Outdoor Unit

Procedures about refrigerant piping and electric wiring at the outdoor are described in this chapter. Most of
procedures are similar to those of LG Air Conditioner.

Refrigerant Piping

Before starting refrigerant piping, constraints in pipe length and elevation should be examined. After resolv-
ing all constraints, some preparations are required to proceed. Then connecting pipe to the outdoor and
the indoor unit is beginning.

Constraints in Pipe Length and Elevation

Pipe Size (mm : inch)
Capacity (Diameter : Ø)
Gas
3kW 12.7(1/2")
5kW
7kW 15.88(5/8") 9.52(3/8")
9kW
12kW
14kW 15.88(5/8") 9.52(3/8")
16kW
CAUTION
1. Standard pipe length is 7.5m If the pipe length is longer than 7.5m, additional charge of the re-
frigerant is required according to the table.
• Example : If 16kW model is installed at a distance of 50m, 1,700g of refrigerant should be
added according to following formula : (50-7.5) x 40g = 1,700g
2. Rated capacity of the product is based on standard length and maximum allowable length is
based on the product reliability in the operation.
3. Improper refrigerant charge may result in abnormal operation.
Note:
Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated greenhouse gases (This note about
f-gas label may not apply depending on your product type or market.)
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for the addition or removal of refrigerant)
③ The total Charge (① + ②)
Length A (m)
Liquid Standard
6.35(1/4") 7.5
7.5
7.5
A trap is not necessary
Indoor unit
when the outdoor unit is
installed in a higher
position than the indoor
unit.
A
B
Outdoor unit
Piping and Wiring for Outdoor Unit
Elevation B (m)
Max. Standard
30 0
50 0
50 0
Outdoor unit
A
B
Indoor unit
*Additional
Refrigerant
Max. (g/m)
30 20
30 40
30 40
Installation Manual 39