Sanyo SPW-C1155DXHN8 Technical Data & Service Manual page 18

1. Model Selecting and Capacity Calculator
Straight equivalent length of joints
1-5. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Straight Equivalent Length of Joints
Wide tubing size (mm)
90° elbow
45° elbow
U-shape tube bent (R60 - 100 mm)
Trap bend
Y-branch distribution joint
Ball valve for service
Capacity loss caused by differences in tubing diameters
* Capacity loss will occur if a tubing system that matches the horsepower is not selected (for example, if a tubing system was
determined and installed with no plan for extension and extension occurs later). The loss rate can be found from the graph
below.
1
2
3
4
(Reading the graph)
<Example 1>
Currently a 20 HP system and
same tubing system.
5
Horsepower after extension: 20 + 8 = 28 HP
From the graph above: Cooling: Capacity ratio is 96.7%. Actual capacity = 28 × 0.967 = 27.1 HP
6
7
8
12.7 15.88
0.3 0.35
0.23 0.26
0.9 1.05
2.3 2.8
Cooling
Heating
ø 19.05 ø22.22
95
96
97
98
99
100
10 12 14
ø22.22 ø25.4
Recommended Gas tubes diameter (mm)
28.58 Gas tubing are used. Subsequently the system is expanded, with 8 HP added to the
Heating: Capacity ratio is 98.6%. Actual capacity = 28 × 0.986 = 27.6 HP
Design of W-2WAY ECO-i SYSTEM Unit Specifications
19.05 22.22 25.4 28.58
0.42 0.48 0.52 0.57
0.32 0.36 0.39 0.43
1.26 1.44 1.56 1.71
3.2 3.8 4.3
Equivalent length conversion not needed.
Equivalent length conversion not needed.
ø25.4
ø28.58
16 18 20 26 30
ø31.75
ø28.58
2-8
31.8 38.1
0.7 0.79
0.53 0.59
2.1 2.37
4.7 5.0 5.8
ø31.75
35 40 45 46 47
ø38.1
48