Sanyo ECO-i AHX0752 Technical Data Manual page 19

1. Model Selecting and Capacity Calculator
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 2-8 Straight Equivalent Length of Joints
Gas tubing size (in.(mm))
90° elbow
45° elbow
U-shape tube bent
(R2–23/64–3–15/16 in.)
T r ap bend
Y-branch distr ibution joint
Ball v alve f or ser vice
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.
90
91
92
93
94
95
96
97
98
99
100
(Reading the graph)
<Example 1>
Currently a 16 HP system and ø1-1/8" Gas tubings are used. Subsequently the system is expanded, with 16 HP added to the
same tubing system.
Horsepower after extension: 16 + 16 = 32 HP
From the graph above: Cooling: Capacity ratio is 90.8%. Actual capacity = 32 × 0.908 = 29.1 HP
Heating: Capacity ratio is 96.0%. Actual capacity = 32 × 0.960 = 30.7 HP
1/2" 5/8" 3/4"
(12.7) (15.88) (19.05)
1 1.1 1.4
0.8 0.9 1
3 3.4 4.1
7.5 9.2 10.5
Equivalent length conversion not needed.
Equivalent length conversion not needed.
Cooling
Heating
ø3/4"
10 12 14 16 18
ø7/8" ø1-1/8"
Recommended Gas tubes diameter (in)
2-9
Design of W-3WAY ECO-i SYSTEM Unit Specifi cations
7/8" 1" 1-1/8"
(22.22) (25.4) (28.58)
1.6 1.7 1.9
1.2 1.3 1.4
4.7 5.1 5.6
12.5 14.1 15.4
ø7/8" ø1" ø1-1/8"
20 26 30 35 40
ø1-3/8"
Unit: ft.
1-3/8"
(38.1)
2.5
1.8
7.4
19.2
ø1-3/8"
45 46 47 48
1
2
3
4
5
6
7
8