Piping Length And Elevation; Refrigerant Charge - LG MU5R40 Installation Manual

INSTALLATION OF OUTDOOR UNIT
14

Piping length and elevation

Multiple Piping Models
Phase Capacity(kBtu/h) Total Length
14/16
18
21
1Ø
24/27
30
40
A
h1
Multiple Piping Type

Refrigerant charge

The calculation of the additional charge should be taken in account for the length of extra pipe.
Multiple Piping Models
Capacity Standard
Phase
(kBtu/h) Length(m)
14/16
18
21
1Ø
24/27
30
40
・ Multiple Piping Models
Additional charge (g) = ((A Room Installation Length – Standard Length) x 20g/m
CF = Max. number of connectable indoor unit – Total number of connected indoor unit
・ (*) : Maximum piping length when console combination
27/30/40k models cannot be combined with console models when combined with consoles
Max Length(A/B)
30
50
50
70
75
85
h2
B
Max Piping for
one room(m)
7.5 20
7.5 25
7.5 25
7.5 25
7.5 25
7.5 25
+ (B Room Installation Length – Standard Length) x 20g/m)
- CF(Correction Factor) x 150
Max Elevation
(h1)
20 15
25 15
25 15
25 15
25 15
25 15
CAUTION
!
Capacity is based on standard length and
maximum allowance length is on the
basis of reliability. If outdoor unit is at
higher elevation than the indoor units,
after 24m of vertical height, 1 oil trap is
required.
Max total Piping Chargeless
Length Length
30
50(40*)
50(40*)
70(50*)/ 70(*)
75(*)
85(*)
(Unit: m)
In - In Elevation
(h2)
7.5
7.5
7.5
7.5
7.5
7.5
(Unit: m)
Additional
Charge(g/m)
20 20
22.5 20
22.5 20
30 20
37.5 20
37.5 20