LG ARWN100LA2.EWGBLEU User Manual download pdf (Page 23)

Installation Manual 23

Refrigerant piping system

ENGLISH

Refrigerant piping system

Y branch method

1 Outdoor Units

Example : 5 Indoor Units connected

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

40m (90 m : Conditional application)

H 100m

L150m (200 m : Conditional application)

Master

Slave

10m or

less

40m (90 m : Conditional application)

H 100m

L150m (200 m : Conditional application)

Piping length from outdoor branch to outdoor unit ≤10m, equivalent length:max 13m

(for 18HP or more)

Additional Application

To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.

1) Diameter of pipes between first branch and the last branch should be increased by one step,

except pipe diameter B,C,D is same as Diameter A

Ø6.35 → Ø 9.52 → Ø 12.7 → Ø 15.88 → Ø 19.05 → Ø 22.2 → Ø 25.4*, Ø 28.58 → Ø 31.8*, Ø 34.9 → Ø

38.1*

* : It is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m

4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]

- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m

2 Outdoor Units

Example : 5 Indoor Units connected

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

: Downward Indoor Unit

: Connection branch pipe

between Outdoor units:

ARCNN20

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 60 61

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LG ARWN100LA2.EWGBLEU User Manual Page 23

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