Panasonic 2WAY Multi U-16GE3E5 Manuel D'installation page 8

Table 1-5 Branch/Header Tube Selection
Use the following branch tubing sets or tubing sets for branching the system's main tube and indoor unit
tubing.
Capacity after branch
Over 72.8 kW
Over 45.0 kW to 72.8 kW
Over 35.5 kW to 45.0 kW
Over 28.0 kW to 35.5 kW
Over 16.0 kW to 28.0 kW
Over 5.6 kW to 16.0 kW
5.6 kW or below
(*1) Make a selection so as not to exceed the main tubing size.
(*2) Even when 5.6 kW or below, make the gas tube diameter Ø15.88 if 2 or more indoor units are connected after
branching.
(*3) As the tube diameter for the supplied reducer does not match, another reducer must be provided by the installer.
Table 1-6 Tubes Connecting Outdoor Units and Indoor Units
Outdoor Units
Tubing connecting to
outdoor units (ℓA to ℓB)
Tube size
Indoor Units
Tubing
connecting to
Unit type
indoor units
(ℓA to ℓB)
Gas tube (mm)
Tube size
Liquid tube (mm)
Note: Keep the maximum length between ℓ1 to ℓn within 30 m.
1. LM: Main tube with largest tubing diameter (includes LA and all post-branch main tubes that are identical in size to LA) ≤ 120 m.
2. Select the sizes for post-branching main tubes after LM (LB, LC, ...) based on the post-branching capacity.
3. The sizes for the indoor unit connection tubing (ℓ1 to ℓn) depend on the tubing diameter for the indoor unit.
No. 1 branch
40 cm or less
Symbols
Branch tube
(purchased separately)
Ball valve (purchased separately)
T-tee (provided by installer)
Closed (pinch) weld
Branch tube size
(*1)
Gas tube (mm) Liquid tube (mm)
Ø31.75 Ø19.05
Ø28.58 Ø15.88
Ø28.58 Ø12.7
Ø25.4 Ø12.7
Ø22.22 Ø9.52
Ø15.88 Ø9.52
Ø12.7 Ø9.52
(*2)
Unit type
Gas tube (mm)
Liquid tube (mm)
22 28 36
Ø12.7
Ø6.35
When T-tee branch tubing is
used (header branch method)
40 cm or less
Used for
expansion
Fig. 5 Length of Refrigerant Tubing
CZ-P224BK2BM
―
―
―
―
●
●
●
45.0 kW 56.0 kW
Ø28.58
Ø12.7
45 56 60 73
ℓn
EN - 8
Branch tube number
Branch tubing
CZ-P680PH(BK)2BM CZ-P1350PH(BK)2BM
―
●
●
●
●
●
(*3)
●
(*3)
71.0 kW
Ø15.88
90 106 140 160
Ø15.88 Ø19.05 Ø22.22
Ø9.52
Maximum height differential of indoor units
after final branch
Four meters is the maximum height differential
between indoor units after the last branch.
If exceeding the 4 m of height between indoor units
after a final branch cannot be helped, split the
difference between rise and fall (2:1).
●
●
●
●
●
●
(*3)
●
(*3)
85.0 kW
Ø31.75
Ø19.05
224 280
Ø12.7
4 m or less
(within α)
（α以内）
2X m
More than
or more
4 m
(within α)
（α以内）
X m