LG MU5R40 - Piping Length and Elevation; Refrigerant Charge Calculation

INSTALLATION OF OUTDOOR UNIT
14
Phase Capacity(kBtu/h) Total Length Max Length(A/B)
Max Elevation
(h1)
In - In Elevation
(h2)
1Ø
14/16 30 20 15 7.5
18 50 25 15 7.5
21 50 25 15 7.5
24/27 70 25 15 7.5
30 75 25 15 7.5
40 85 25 15 7.5
h2
h1
A
B
Multiple Piping Type
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.
CAUTION
!
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
M
ultiple Piping Models (Unit: m)
· Multiple Piping Models
· (*) : Maximum piping length when console combination
27/30/40k models cannot be combined with console models when combined with consoles
Additional charge (g) = ((A Room Installation Length – Standard Length) x 20g/m
+ (B Room Installation Length – Standard Length) x 20g/m)
- CF(Correction Factor) x 150
CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Phase
Capacity
(kBtu/h)
Standard
Length(m)
Max Piping for
one room(m)
Max total Piping
Length
Chargeless
Length
Additional
Charge(g/m)
1Ø
14/16 7.5 20 30 20 20
18 7.5 25 50(40*) 22.5 20
21 7.5 25 50(40*) 22.5 20
24/27 7.5 25 70(50*)/ 70(*) 30 20
30 7.5 25 75(*) 37.5 20
40 7.5 25 85(*) 37.5 20
Piping length and elevation
Multiple Piping Models (Unit: m)
ENGLISH