Fujitsu AB* A12GATH, Дизайн и техническое руководство

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„ z
Selection of pipe size
a a1 b b1 c c1 d d1 e e1
Liquid pipe 9.52 6.35 12.70 6.35 12.70 6.35 12.70 6.35 9.52 6.35
Gas pipe 19.05 12.70 22.22 12.70 22.22 12.70 19.05 12.70 19.05 12.70
Length (m)
Example
40 15 5 10 5 10 5 10 5 10
f f1 g g1 h
Liquid pipe 9.52 6.35 9.52 6.35 6.35
Gas pipe 15.88 12.70 15.88 12.70 9.52
Length (m)
Example
5 10 5 10 7
„ z
Limitation check
Diagram
Example
(m)
Limitation
(m)
Judge
Total pipe length Total 152 400m or less OK
Between outdoor unit and farthest indoor unit a+b+c+d+e+f+g+h 77 120m or less OK
Between the first separation tube and the farthest indoor unit b+c+d+e+f+g+h 37 90m or less OK
Between outdoor unit and the nearest indoor unit a+a1 55 5m or more OK
Between outdoor unit and the first seperation tube a 40 3m or more OK
„ z
Calculation of additional charge refrigerant
1. Calculation of additional amount for pipe length
Liquid pipe size 12.70 9.52 6.35
Additional refrigerant
(kg/m)
0.114 0.058 0.021
Liquid pipe length (m) 15 55 82
A = (0.114 x 15) + (0.058 x 55) + (0.021 x 82) = 6.62 (kg)
2. Factory charged amount
Model
Factory charged
amount (kg)
Outdoor unit AJ

072 7.0
B = 7.0 (kg)
3. Total refrigerant amount check
C = A + B = 6.62 + 7.0 = 13.62 (kg) < 20.0 (kg) → OK
Check pipe length and height difference between units by comparing with items shown in "2-2.PIPING
LIMITATION".
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