Design of 3WAY VRF SYSTEM
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1. Model Selecting and Capacity Calculator
Liquid tubing size
Amount of refrigerant
(in. (mm))
charge (oz/ft.)
ø1/4"
(ø6.35)
0.279
ø3/8"
(ø9.52)
0.602
ø1/2"
(ø12.7)
1.38
ø5/8"
(ø15.88)
1.99
ø3/4"
(ø19.05)
2.78
ø7/8"
(ø22.22)
3.93
Table 2-5 Amount of Refrigerant Charge
Material O
Material 1/2H • H
ø1/4" (ø6.35)
t1/32 (t0.8)
ø3/8" (ø9.52)
t1/32 (t0.8)
ø1-1/8" (ø28.58)
t5/128 (t1.0)
ø1/2" (ø12.7)
t1/32 (t0.8)
ø1-1/4" (ø31.75)
t3/64 (t1.1)
ø5/8" (ø15.88)
t5/128 (t1.0)
ø1-1/2" (ø38.10)
ø3/4" (ø19.05)
ø1-5/8" (ø41.28)
ø7/8" (ø22.22)
t5/128 (t1.0)
*
Unit: in. (mm)
e
Discharge tubing
Liquid tubing
Suction tubing
Indoor unit type
7
12
15
18
19
24
36
48
54
ø5/8" (ø15.88)
ø1/2" (ø12.7)
ø3/8" (ø9.52)
Gas tubing
Liquid tubing
ø1/2" (ø12.7)
ø1/4" (ø6.35)
ø5/8" (ø15.88)
ø3/8" (ø9.52)
Table 2-6 Indoor Unit Tubing Connection Size (
1– 40
)
Table 2-7 Refrigerant tubing (Existing tubing can be used.)
Distribution
joint-solenoid
valve kit tubing
Solenoid valv
kit-Indoor
unit tubing
connection
over t5/128 (t1.0)
over t3/64 (t1.15)
over t3/64 (t1.20)
Tubing size (in. (mm))
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
crushing or damaging the tubes when
bending them.
*1: For the solenoid valve kits, use type 160 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
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TD831158-00̲3WAY̲VRF̲SYS.indb 7
TD831158-00̲3WAY̲VRF̲SYS.indb 7
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Summary of Contents for U-72MF1U9
Page 118: ...Section 8 TENTATIVE ...