6. SYSTEM DESIGN
Limitation check

Diagram
Example
m
Limitation
m
Judge
Total pipe length Total 72 115 or less
OK
Between outdoor unit and the farthest indoor unit a + c + k 37 70 or less
OK
Between outdoor unit and branch boxes a + c + d 42 55 or less
OK
Between branch box and indoor unit
Tot al f + g + h + i + j + k 30 60 or less
OK
Each unit f, g, h, i, j, k 5 Between 3 to 15
OK
etween outdoor unit and the rst separation tube a 7 5 or more
OK
Calculation of additional charge refrigerant

Liquid pipe size
mm (in.)
6.35
(1/4)
9.52
(3/8)
Additional refrigerant
g/m
21 58
Liquid pipe length
m
30 42
Additional charge = (21 x 30) + (58 x 42) = 3066 g = 3.07 kg
- (06 - 22) -
SYSTEM
DESIGN
SYSTEM
DESIGN
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