Fujitsu AU*G36LRLA Design & Technical Manual page 239

(Example 1)
Indoor unit
(24,000 BTU)
L2 : 10 m
Liquid pipe [mm]
Gas pipe [mm]
Indoor unit
(24,000 BTU)
L3 : 7 m
Liquid pipe [mm]
Gas pipe [mm]
• Additional charging amount
Liquid pipe diameter [mm]
Applying the formula,
(0 x 100) + (37 x 50) + (0 x 30) - 1500 = 350
The additional charging amount is 350 g.
(Example 2)
Indoor unit
(18,000 BTU)
L2 : 5 m
Liquid pipe [mm]
Gas pipe [mm]
Indoor unit
(18,000 BTU)
L3 : 5 m
Liquid pipe [mm]
Gas pipe [mm]
Indoor unit
(18,000 BTU)
L4 : 5 m
Liquid pipe [mm]
Gas pipe [mm]
• Additional charging amount
Liquid pipe diameter [mm]
Applying to the formula,
(10 x 100) + (0 x 50) + (15 x 30) - 1500 = –50
The calculated value is negative. Do not add or remove any refrigerant.
9.52
15.88
9.52
15.88
12.70
9.52
6.35
6.35
12.70
6.35
12.70
6.35
12.70
12.70
9.52
6.35
- (05-10) -
Outdoor unit
(54,000 BTU)
L1 : 20 m
Liquid pipe [mm]
Gas pipe [mm]
Piping length [m]
0
37
0
Outdoor unit
(54,000 BTU)
L1 : 10 m
Liquid pipe [mm] 12.70
Gas pipe [mm] 15.88
Piping length [m]
10
0
15
9.52
15.88
Coefficient
A = 0
B = 37
C = 0
Coefficient
A = 10
B = 0
C = 15