Table of Contents
Advertisement
Table 6 Indoor Unit Tubing Connection Size
■
Indoor unit type
Suction tube
Distribution joint –
Discharge tube
solenoid valve kit tubing
Liquid tube
Solenoid valve kit –
Gas tube
Indoor unit tubing
Liquid tube
connection
*1: For the solenoid valve kits, use CZ-P160HR3 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
1-7. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 7 Straight Equivalent Length of Joints
Gas tubing size (mm)
90° elbow
45° elbow
U-shape tube bent (R60-100 mm)
Trap bend
Y-branch distribution joint
Ball valve for service
Table 8 Refrigerant Tubing
Tubing size (mm)
Material Temper - O
ø6.35
t0.8
ø9.52
t0.8
ø12.7
t0.8
ø15.88
t1.0
ø19.05
t1.2
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated below.
Required amount of additional refrigerant charge
= [ (Amount of additional refrigerant charge per meter of each size of liquid tube × its tube length) + (...) + (...)]
+ [(Necessary amount of additional refrigerant charge per outdoor unit) + (...) + (...)]
+ [(Necessary amount of additional refrigerant charge per meter of each size of discharge tube × its tube length) + (...) + (...)]
*Always charge accurately using a scale for weighing.
*If the existing tubing is used and the amount of on-site refrigerant charge exceeds the value listed below, change the size of the tubing
to reduce the amount of refrigerant.
Total amount of refrigerant for the system with 1 outdoor unit: 50 kg
Total amount of refrigerant for the system with 2 outdoor units: 80 kg
Total amount of refrigerant for the system with 3 outdoor units: 105 kg
Table 9 Necessary Amount of Additional Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size (mm)
Amount of additional
refrigerant charge/m (g/m)
Table 10 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
U-8MF3R7
U-10MF3R7
1.0 kg
1.0 kg
Table 11 Refrigerant Charge Amount at Shipment (for Outdoor Unit)
U-8MF3R7
U-10MF3R7
9.8 kg
9.8 kg
22
28
ø12.70
12.7
0.30
0.23
0.90
2.30
Material Temper - 1/2 H • H
ø22.22
ø25.4
ø28.58
ø31.75
ø38.1
over t1.35
ø41.28
over t1.45
6.35
9.52
12.7
15.88
26
56
128
185
U-12MF3R7
U-14MF3R7
3.9 kg
3.9 kg
U-12MF3R7
U-14MF3R7
11.8 kg
11.8 kg
36
45
56
60
73
ø15.88
ø12.70
ø6.35
15.88
19.05
22.22
0.35
0.42
0.48
0.26
0.32
0.36
1.05
1.26
1.44
2.80
3.20
3.80
Equivalent length conversion not needed.
Equivalent length conversion not needed.
* 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
t1.0
crushing or damaging the tubes when
t1.0
bending them.
t1.0
t1.1
19.05
22.22
259
366
U-16MF3R7
3.9 kg
U-16MF3R7
11.8 kg
12
90 106 112 140 160 180
ø9.52
ø15.88
ø9.52
25.4
28.58
31.75
0.52
0.57
0.70
0.39
0.43
0.53
1.56
1.71
2.10
4.30
4.70
5.00
Unit: mm
*1
*1
*1
224
280
ø19.05
ø22.22
ø15.88
ø19.05
ø19.05
ø22.22
38.1
41.28
0.79
0.85
0.59
0.64
2.37
2.55
5.80
6.80
Advertisement
Table of Contents
