Fujitsu AIRSTAGE J-II Design & Technical Manual page 470

Selection of pipe size
z „
a
Liquid pipe 9.52
Gas pipe 19.05 12.70
Length (m)
40
Example
f
Liquid pipe 9.52
Gas pipe 15.88 12.70
Length (m)
5
Example
Limitation check
z „
Total pipe length
Between outdoor unit and farthest indoor unit
Between the first separation tube and the farthest indoor unit
Between outdoor unit and the nearest indoor unit
Between outdoor unit and the first seperation tube
Calculation of additional charge refrigerant
z „
1. Calculation of additional amount for pipe length
Liquid pipe size
Additional refrigerant
(kg/m)
Liquid pipe length (m)
A = (0.058 x 70) + (0.021 x 82) = 5.79 (kg)
2. Factory charged amount
Outdoor unit
B = 5.30 (kg)
3. Total refrigerant amount check
C = A + B = 5.79 + 5.30 = 11.09(kg) < 15.70 (kg) → OK
Check pipe length and height difference between units by comparing with items shown in "2-2.PIPING
LIMITATION".
a1 b b1
6.35 9.52 6.35
19.05 12.70
15 5 10
f1 g g1
6.35 9.52 6.35
15.88 12.70
10 5 10
9.52 6.35
0.058 0.021
70 82
Factory charged
Model
amount (kg)
AJ  A54 5.30
c c1 d
9.52 6.35 9.52
15.88 12.70 15.88
5 10 5
h
6.35
12.70
7
Diagram
Total
a+b+c+d+e+f+g+h
b+c+d+e+f+g+h
a+a1
a
- (06 - 28) -
d1 e e1
6.35 9.52 6.35
12.70 15.88 12.70
10 5 10
Example Limitation
Judge
(m) (m)
152 180m or less OK
77 120m or less OK
37 40m or less OK
55 5m or more OK
40 3m or more OK