Sanyo SPW-CR703GDCH8 - Page 36

II - 14
Design of W-ECO MULTI SYSTEM
2
TD831077
1. Model Selecting and Capacity Calculation
7 Straight equivalent length of joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Required copper tube dimensions Unit: mm
Type 0
Copper tube
Outer diameter 6.35 9.52 12.7 15.88 19.05 22.2
Wall thickness 0.8 0.8 0.8 1.0 1.0 1.2
Straight Equivalent Lenght of Joints
Wide tube size (mm) 12.7 15.88 19.05 22.22 25.4 28.58 31.8 38.1 41.28 44.45
90° Elbow 0.30 0.35 0.42 0.48 0.52 0.57 0.70 0.79 0.85 0.92
45° Elbow 0.23 0.26 0.32 0.36 0.39 0.43 0.53 0.59 0.64 0.69
U-shape tube bent (R60~100 mm) 0.90 1.05 1.26 1.44 1.56 1.71 2.10 2.37 2.55 2.76
Trap bent 2.30 2.80 3.20 3.80 4.30 4.70 5.00 5.80 6.80 7.40
Y-branch distribution joint Equivalent length conversion not needed
Ball valve for service Equivalent length conversion not needed
Unit: m
Type 1/2 H, H
Copper tube
Outer diameter 25.4 28.58 31.8 38.1 41.3 44.45 50.8
Wall thickness 1.0 1.0 1.2 1.3 1.3 1.4 1.5
* Refrigerant pipes of the same wall thickness as R22 can be used for R407C.
* C1220 type with JIS H 3300 designation (Copper Pipe and Copper Alloy Seamless Pipe)
7 Additional refrigerant charge amount
Additional refrigerant charge amount is calculated from the narrow tube total length as follows.
NOTE
Required amount of additional charge
= (Amount of additional refrigerant charge per meter of
each size of narrow tube × its tube length)
+ (...) + (...)
* Always recharge accurately using a scale for weighing.
Narrow tube size Amount of refrigerant
additional charge/m (g/m)
9.52 75
12.7 125
15.88 195
19.05 280
22.22 400
25.4 500
Amount of refrigerant additional charge
per meter, according to narrow tube size
PC unit AD unit
SPW-CR1503GDYH8 SPW-CR1903GDYH8 SPW-CR703GDCH8 SPW-CR903GDCH8
16.5 20 8 9.5
R407C models
PC unit AD unit
SPW-C1503GDYH8 SPW-C1903GDYH8 SPW-C703GDCH8 SPW-C903GDCH8
16.5 20 8 9.5
R22C models
Refrigerant charge amount at shipment.
R407C
(kg)
R22
(kg)