Additional Charge Calculation - Fujitsu AJ 126LELDH Series Design & Technical Manual

2-5. Additional charge calculation

NOTES:
• 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.
• Round up the calculated result to two decimal places.
¢ Calculation formula
• Calculation of additional amount for pipe length (A)
Diameter of liquid pipe
Total length of
Ø12.70 mm
liquid pipe
A =
Total length of
Ø6.35 mm
liquid pipe
A =
• Factory charge amount (B)
Model name
AJ072LELDH
AJ090LELDH
AJ108LELDH
AJ126LELDH
AJ144LELDH
AJ162LELDH
Factory charge amount
B =
2-5. Additional charge calculation
mm
Ø6.35
Ø9.52
Ø12.70
a:
× 0.114 kg/m
m
a:
× 0.021 kg/m
m
kg
b: Outdoor unit
kg
a: Additional amount for pipe length
Total length of
Ø9.52 mm
liquid pipe
+
kg
Total
=
kg
Round up A to 2 decimal place.
b: Factory charged amount
HP
8
10
12
14
16
18
- (06-27) -
kg/m
0.021
0.058
0.114
a:
× 0.058 kg/m
m
kg
kg
kg
7.0
7.5
7.5
11.0
11.0
11.8
2. Piping design
+