Panasonic U-16GE3E5 Verfahren Und Technische Punkte Für Die Installation Der Anlage Seite 9

3WAY Multi Models
Table 2-1 System limitations
Capacity proportion of the indoor units to the outdoor unit
Minimum capacity of indoor units that can be connected
Maximum number of indoor units (systems) that can be connected
Table 2-2 Ranges for refrigerant tubing length and installation height difference
Category Symbol
Allowable tubing length L2-L3
ℓ1, ℓ2...ℓ24
Allowable height
difference
Allowable length for
branched tubing
(header branch)
(*1) The minimum length of tubes between outdoor units and indoor units is 7 m.
(*2) If cooling mode is expected to be used when the external temperature is 10°C or below, install so the
maximum length is 30 m.
(*3) Install so that the height difference between indoor units after the final branch is within the limits shown
in Fig 6.
Outdoor unit
3-tube line (discharge gas tube, suction gas tube, liquid tube)
2-tube line (gas tube, liquid tube)
LB
ＬＡ
First branch
(Branch line)
ℓ １
L3
Externally mounted solenoid valve kit (sold separately)
Solenoid valve kit (purchased separately)
Branch tube (purchased separately)
Ball valve (purchased separately)
T-tee (provided by installer)
Closed (pinch) weld
Header (purchased separately)
Maximum height differential of indoor units after final branch
Height difference between indoor units after the final branch must be less than 4 m.
Outdoor unit
L1 Max. allowable tubing length
Difference between longest and shortest tubing lengths
after the No. 1 branch (first branching point)
Max. length for each tube branch
Max. height difference between
H1
indoor and outdoor units
H2 Max. height difference between indoor units
Max. length between first T-tee branch (provided by
L3
installer) and the closed tube end
L1
L2
LC LD
When T-tee branch tubing is used
(header branch method)
ℓ ２ ℓ ３ ℓ ４
Indoor unit
CAUTION : 1) Each indoor unit requires a solenoid valve kit.
4 m or less
Fig. 6 Length of Refrigerant Tubing
45.0 kW
50 - 200 %
≤ 22 type (equivalent to 0.8 horsepower)
24
Description
If outdoor unit is above
If outdoor unit is below
L4
ℓ ｎ
ℓ n-1
2) Never branch the tube between a solenoid valve kit and indoor unit.
3) Never branch the tube again after the header branching.
4) If using an external electric valve kit, install it between the solenoid
valve kit and the indoor unit.
If height difference between indoor units after the final branch cannot be less than 4 m,
divide the height difference between upper and lower units (2 to 1).
EN - 9
56.0 kW 71.0 kW
Tubing length (m)
≤ 120 (equivalent length 145)
(*1)
≤ 30
≤ 30
≤ 50
≤ 35
(*2)
≤ 15
(*3)
≤ 2
2X m or
more
More than 4 m
X m