Fujitsu AU G18LVLB Series Design & Technical Manual page 150

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
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 50) + (B x 30) - 1,500
• A = Piping length (m) of liquid pipe [9.52 mm (3/8 in.)]
• B = Piping length (m) of liquid pipe [6.35 mm (1/4 in.)]
• Do not remove refrigerant, even if the additional amount calculated is negative.
L2
L3 L1
H1
- (04-08) -
Triple type
L2
L3
H2
L4 L1
H1