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

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.
*Pipes and wires should be purchased separately for installation of the product.
(For Split)
*In the case of Hydrosplit Model, there is no refrigerant piping

Refrigerant Piping

Before starting refrigerant piping, constraints in pipe length and elevation should be examined.
After resolving 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
Capacity
Refrigerant
(kW)
5/7/9/12/
R410A
14/16
R32 5/7/9
Indoor unit
A
B
Outdoor unit
CAUTION
!
1
For R410A products, 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
For R32 products, If the pipe length is longer than 10 m, additional charge of the
refrigerant is required according to the table.
• Example : If R32 9 kW model is installed at a distance of 50 m, 1 200 g of refrigerant
should be added according to following formula : (50-10) x 30 g = 1 200 g
3
Rated capacity of the product is based on standard length and maximum allowable length
is based on the product reliability in the operation.
4
Improper refrigerant charge may result in abnormal operation.
5
Oil trap should be installed every 10 meters.
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)
Pipe Diameter [mm(inch)]
Gas Liquid
15.88(5/8") 9.52(3/8")
15.88(5/8") 9.52(3/8")
A trap is not
necessary when the
outdoor unit is
installed in a higher
position than the
indoor unit.
Indoor unit
PIPING AND WIRING FOR OUTDOOR UNIT
Length A (m) Elevation B (m)
Standard Max.
7.5 50
5 50
Outdoor unit
Oil trap
A
Indoor unit
B
Additional
Refrigerant (g/m)
Max.
30 40
30 30
Outdoor unit
A
B
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