Piping And Wiring For Outdoor Unit; Refrigerant Piping - LG Therma V AHUW096A3 Installation Manual

PIPING AND WIRING FOR OUTDOOR UNIT

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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 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
Pipe Size (mm : inch)
Capacity (Diameter : Ø)
Gas
5kW
7kW
9kW
15.88(5/8") 9.52(3/8")
12kW
14kW
16kW
CAUTION
!
1
Standard pipe length is 7.5m If the pipe length is longer than 7.5m, additional charge of
the refrigerant 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
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
Elevation B (m)
Max. Standard
50 0
Outdoor unit
A
B
Indoor unit
*Additional
Refrigerant
(g/m)
Max.
30 40