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05-194
5/27/05
5:06 PM
1-6. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 1-5 Straight Equivalent Length of Joints
Gas tubing size (mm)
90° elbow
45° elbow
U-shape tube bend (R60 100 mm)
Trap bend
Y-branch distribution joint
Ball valve for service
Table 1-6 Required Copper Tubing Dimensions
Material
Outer diameter
Copper tubing
Wall thickness
1-7. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Table 1-7 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size
Narrow tubing size
φ 6.35
φ 9.52
Table 1-8 Refrigerant Charge Amount at Shipment (for outdoor unit)
Heat pump unit
(kg)
Cooling only unit
(kg)
1-8. System Limitations
Table 1-9 System Limitations
Outdoor units (Type)
Number of max. connectable indoor units
Max. allowable indoor/outdoor capacity ratio
Page 9
12.7
0.30
0.23
0.90
2.30
Equivalent length conversion not needed.
Equivalent length conversion not needed.
6.35
9.52
0.8
0.8
Amount of refrigerant
charge/m (g/m)
26
56
SPW-CR365GXH56
SPW-CR485GXH56
3.5
SPW-CR365GX56
SPW-CR485GX56
3.5
15.88
19.05
0.35
0.42
0.26
0.32
1.05
1.26
2.80
3.20
Unit: mm
O
12.7
15.88
19.05
0.8
1.0
1.0
Required amount of charge = (Amount of refrigerant
charge per meter of each size of liquid tube × its tube
length) + (...) + (...)
*Always charge accurately using a scale for weighing.
SPW-CR605GXH56
3.5
SPW-CR605GX56
3.5
365
485
605
6
8
9
50
130%
9
3.5
3.5
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