Refrigerant Piping; Piping And Wiring For Outdoor Unit - LG THERMA V Series Installation Manual

Piping and Wiring for Outdoor Unit

Procedures about refrigerant piping and electric wiring of the outdoor unit 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
meeting all constraints, some preparations are required to proceed. Initially, connect the pipe to both the
indoor and outdoor units.
Constraints in Pipe Length and Elevation
Pipe Size (mm : inch)
(Diameter : Ø)
Gas Liquid
15.88(5/8") 9.52(3/8")
Indoor unit
1. Standard pipe length is 7.5 m If the pipe length is longer than 7.5 m, additional charge of the
refrigerant is required according to the table.
• Example : If 16 kW model is installed at a distance of 50 m, 1 700 g of refrigerant should be
added according to following formula : (50-7.5) x 40 g = 1 700 g
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 malfunctioning.
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)
Standard Max.
7.5 50
A trap is not necessary
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)
Standard
0
Outdoor unit
A
B
Indoor unit
*Additional
Refrigerant
(g/m)
Max.
30 40
Installation Manual 47