Fisher FSKIF-121AE2-EU Service Manual page 109

Note: All used branch pipe must be produced by Fisher, otherwise it causes malfunction.
The indoor units should be installed equivalently at the both side of the U type branch
pipe.
Total pipe length (Actual)
Max. branch pipe length
Max. branch pipe length difference
Max.
indoor unit and outdoor unit
Max.
indoor units
5.3.2 Size of joint pipes for indoor unit (R410a)
5.3.3 Size of joint pipes for outdoor unit (R410a)
5.3.4 The branching pipe must be installed horizontally, error angle of it should not large than 10°. Otherwise,
malfunction will be caused.
Installation
height difference between
height difference between
Permitted Value
18K+18K 30m
24K+24K 50m
30K+30K 50m
15m
10m
20m
0.5m
Refrigerant pipe installation
Piping
L+L1+L2
L1, L2
L1-L2
H1
H2
105