Fujitsu AU*G36LRLA Design & Technical Manual page 238

IF ADDITIONAL REFRIGERANT IS REQUIRED
„ „
• When the piping is longer than pre-charge length, additional charging is necessary.
• For the additional amount, see the table below.
Additional charging amount
Single system
z „
L1
Simultaneous multi system
z „
Twin type
H2
Twin type: L1+L2+L3 > Pre-charge length
Triple type: L1+L2+L3+L4 > Pre-charge length
The additional charging amount for twin / triple type will be calculated as follows.
Additional charging amount (g)
= (A x 100) + (B x 50) + (C x 30) - 1,500
• A = Piping length (m) of liquid pipe [12.70 mm (1/2 in.)]
• B = Piping length (m) of liquid pipe [9.52 mm (3/8 in.)]
• C = Piping length (m) of liquid pipe [6.35 mm (1/4 in.)]
• Do not remove refrigerant, even if the additional amount calculated is negative.
L1 > Pre-charge length
Refrigerant pipe size
[mm (in.)]
Piping length
H1
Liquid
Gas
Piping length
Liquid
Gas
Piping length
Liquid 12.70 (1/2)
Gas
L2
L3 L1
H1
- (05-09) -
Additional charging amount [g]
30 m or less 40 m
9.52 (3/8)
None 500
15.88 (5/8)
30 m or less 40 m
9.52 (3/8)
None 500
19.05 (3/4)
15 m or less 25 m
15.88 (5/8) None 1,000 2,000
19.05 (3/4)
Triple type
H2
Rate
[g/m]
50 m 60 m 70 m
1,000 1,500 2,000
50 m
1,000
35 m
100
L2
L3
L4 L1
H1
50
50