6. SYSTEM DESIGN
Limitation check

Diagram
Example
m
Limitation
m
Judge
Total pipe length Total 84 115 or less
OK
Between outdoor unit and the farthest indoor unit c + h 60 70 or less
OK
Between outdoor unit and branch box c 45 55 or less
OK
Between branch box and indoor unit
Tot al f + g + h 39 60 or less
OK
Each unit f, g, h 12 to 15 Between 3 to 15
OK
Between outdoor unit and branch box
(When there is no separation tube)
c 45 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
39 45
Additional charge = (21 x 39) + (58 x 45) = 3429 g = 3.43 kg
- (06 - 24) -
SYSTEM
DESIGN
SYSTEM
DESIGN
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