Panasonic U-72MF1U9 Technical Data Manual page 21

1. Model Selecting and Capacity Calculator
Table 2-5 Amount of Refrigerant Charge
Liquid tubing size
(in. (mm))
ø1/4" (ø6.35)
ø3/8" (ø9.52)
ø1/2" (ø12.7)
ø5/8" (ø15.88)
ø3/4" (ø19.05)
ø7/8" (ø22.22)
Table 2-6 Indoor Unit Tubing Connection Size (
Indoor unit type
Suction tubing
Distribution
joint-solenoid
Discharge tubing
valve kit tubing
Liquid tubing
Solenoid valv e
Gas tubing
kit-Indoor
unit tubing
Liquid tubing
connection
*1: For the solenoid valve kits, use type 160 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
Table 2-7 Refrigerant tubing (Existing tubing can be used.)
Material O
ø1/4" (ø6.35) t1/32 (t0.8)
ø3/8" (ø9.52) t1/32 (t0.8)
ø1/2" (ø12.7) t1/32 (t0.8)
ø5/8" (ø15.88) t5/128 (t1.0)
ø3/4" (ø19.05) over t5/128 (t1.0)
ø7/8" (ø22.22) t5/128 (t1.0)
Amount of refrigerant
charge (oz/ft.)
0.279
0.602
1.38
1.99
2.78
3.93
1– 40
12
7 9
ø1/2" (ø12.7)
ø1/4" (ø6.35)
Tubing size (in. (mm))
Material 1/2H • H
ø1-1/8" (ø28.58)
ø1-1/4" (ø31.75)
ø1-1/2" (ø38.10)
ø1-5/8" (ø41.28)
)
15 18 19
ø5/8" (ø15.88)
ø1/2" (ø12.7)
ø3/8" (ø9.52)
* When bending the tubes, use a bending
radius that is at least 4 times the outer
diameter of the tubes.
In addition, take sufficient care to avoid
t5/128 (t1.0)
crushing or damaging the tubes when
bending them.
t3/64 (t1.1)
over t3/64 (t1.15)
over t3/64 (t1.20)
2 - 7
Design of 3WAY VRF SYSTEM
Unit: in. (mm)
24 36 48 54
ø5/8" (ø15.88)
ø3/8" (ø9.52)
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