Additional Charge Calculation - Fujitsu AIRSTAGE J-IIIL 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
Ø1/2 in (12.70 mm)
liquid pipe
A =
Total length of
Ø1/4 in (6.35 mm)
liquid pipe
A =
• Factory charge amount (B)
Model name
AOU72RLAVL
AOU96RLAVL
AOU120RLAVL
Factory charge amount
B =
2-5. Additional charge calculation
in (mm)
Ø1/4 (6.35)
Ø3/8 (9.52)
Ø1/2 (12.70)
a:
× 0.077 lb/ft
(0.114 kg/m)
in (mm)
lb (kg)
a:
× 0.014 lb/ft
(0.021 kg/m)
in (mm)
lb (kg)
lb (kg)
b: Outdoor unit
lb (kg)
a: Additional amount for pipe length
Total length of
Ø3/8 in (9.52 mm)
liquid pipe
+
Total
=
Round up A to 2 decimal place.
Ton b: Factory charged amount
6
8
10
- (06-26) -
lb/ft (kg/m)
0.014 (0.021)
0.039 (0.058)
0.077 (0.114)
a:
× 0.039 lb/ft
(0.058 kg/m)
in (mm)
lb (kg)
lb (kg)
24.25 lb (11.0 kg)
2. Piping design
+