Fujitsu AIRSTAGE V-II, Design & Technical Data

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662656 ADDITIONAL CHARGE CALCULATION
The outdoor unit is charged refrigerant at the factory. ●
Additional refrigerant required to be charged on site depending on pipe length and outdoor ●
unit model.
The additional refrigerant charge amount is calculated according to the following formula. ●
The overall refrigerant amount should not be exceed 30kg per outdoor unit. ●
Round up the calculated result to two decimal places. ●
CALCULATION OF ADDITIONAL CHARGE REFRIGERANT
„ „
66 Calculation of additional amount for outdoor unit
26 Calculation of additional amount for pipe length
36 Calculation of additional charge refrigerant
C = A + B =
Round up C to 2 decimal place.
46 Calculation of factory charged amount
56 Total refrigerant amount check
E = C + D =
Note : Check the total refrigerant amount under the following conditions6
Condition Computational formula
For 1 outdoor unit per refrigerant system : Total amount of refrigerant ≤ 31.5kg E ≤ 31.5kg
For 2 outdoor units per refrigerant system : Total amount of refrigerant ≤ 63.0kg E ≤ 63.0kg
For 3 outdoor units per refrigerant system : Total amount of refrigerant ≤ 94.5kg E ≤ 94.5kg
When total refrigerant amount exceed limitation.
Reduce pipe length for refrigerant system. ●
Change the refrigerant system configuration. ●
kg
kg
Model HP
d
Factory charged
amount (kg)
a
Additional amount
for outdoor unit (kg)
AJ

A72LALH 8 11.20 0
AJ

A90LALH 10 11.20 0
AJ

108LALH 12 11.80 1.20
AJ

126LALH 14 11.80 3.30
AJ

144LALH 16 11.80 3.30
Diameter of liquid
pipe (mm)
b
Additional amount for
pipe length (kg/m)
ø6.35 0.021
ø9.52 0.058
ø12.70 0.114
ø15.88 0.178
ø19.05 0.268
a : Outdoor unit 1
additional amount for
outdoor unit
kg
a : Outdoor unit 2
additional amount for
outdoor unit
kg
a : Outdoor unit 3
additional amount for
outdoor unit
kg
A= = + +
To
tal
kg
Total
length of
ø15.88mm
liquid pipe
b :
x 0.178
kg/m
m
kg
Total
length of
ø19.05mm
liquid pipe
b :
x 0.268
kg/m
m
kg
Total
length of
ø12.70mm
liquid pipe
b :
x 0.114
kg/m
m
kg
Total
length of
ø9.52mm
liquid pipe
b :
x 0.058
kg/m
m
kg
Total
length of
ø6.35mm
liquid pipe
b :
x 0.021
kg/m
m
kg
+
+
+ + B=
=
To
tal
kg
d : Outdoor unit 1
factory charged amount
kg
d : Outdoor unit 2
factory charged amount
kg
d : Outdoor unit 3
factory charged amount
kg
D= + +
=
To
tal
kg
- (06 - 26) -
SY
ST
EM
DE
SIGN
SY
ST
EM
DE
SIGN