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PIPING AND WIRING FOR OUTDOOR UNIT
48
PIPING AND WIRING FOR OUTDOOR UNIT
Procedures about refrigerant piping, water 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.
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)
R32
5/7/9
Indoor unit
B
!
CAUTION
1
For R32 products, standard pipe length is 5 m, 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, 1 600 g of refrigerant
should be added according to following formula : (50-10) x 40 g = 1 600 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 abnormal operation.
4
Oil trap should be installed every 10 meters, when the outdoor unit is installed in a higher
position than the indoor unit.
5
Installing a refrigerant pipe that is shorter than the standard length may result in noise or
abnormal operation of the product.
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")
A
Oil trap
Indoor unit
Outdoor unit
Length A (m)
Elevation B (m) Additional Refrigerant
Standard
Max.
5
50
Outdoor unit
A
B
(g/m)
Max.
40
30
(longer than 10 m)
A trap is necessary
when the outdoor
unit is installed in a
higher position than
the indoor unit.
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