Sanyo R410A User Manual
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Table 1-16 Refrigerant Charge Amount at Shipment (for outdoor unit)
DC
CHDX09053
CHDX14053
(oz)
423
458
1-9. System Limitations
Table 1-17 System Limitations
Max. No. allowable connected outdoor units
2
*1
Max. capacity allowable connected outdoor units
307,100 BTU/h (32 hp, 90 kW)
Max. connectable indoor units
40
Max. allowable indoor/outdoor capacity ratio
50 – 130 %
*1: Up to 2 units can be connected if the system has been extended.
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 1-13 Straight Equivalent Length of Joints
Gas tubing size (in. (mm))
1/2"
(12.7)
5/8"
(15.88)
3/4"
(19.05)
7/8"
(22.22)
1"
(25.4)
1-1/8"
(28.58)
1-1/4"
(31.8)
1-1/2"
(38.1)
90
° elbow
1
1.1
1.4
1.6
1.7
1.9
2.3
2.6
45
° elbow
0.8
0.9
1
1.2
1.3
1.4
1.7
1.9
U-shape tube bent (R2-3/8" – 4" (60 – 100))
3
3.4
4.1
4.7
5.1
5.6
6.9
7.8
Trap bend
7.5
9.2
10.5
12.5
14.1
15.4
16.4
14.0
Y-branch distribution joint
Equivalent length conversion not needed.
Ball valve for service
Equivalent length conversion not needed.
Table 1-14 Refrigerant tubing (Existing tubing can be used.)
Tubing size (in. (mm))
Material O
Material 1/2H • H
ш1/4" (ш6.35)
t1/32" (0.8)
ш7/8" (ш22.22)
t5/128" (1.0)
ш3/8" (ш9.52)
t1/32" (0.8)
ш1" (ш25.40)
t5/128" (1.0)
ш1/2" (ш12.7)
t1/32" (0.8)
ш1-1/8" (ш28.58)
t5/128" (1.0)
ш5/8" (ш15.88)
t5/128" (1.0)
ш1-1/4" (ш31.75)
t3/64" (1.1)
ш3/4" (ш19.05)
over t5/128" (1.0)
ш1-1/2" (ш38.10)
over t3/64" (1.15)
ш1-5/8" (ш41.28)
over t3/64" (1.20)
* 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
crushing or damaging the tubes when
bending them.
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Table 1-15 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size
Amount of refrigerant
(in. (mm))
charge (oz/ft.)
ш1/4" (ш6.35)
0.279
ш3/8" (ш9.52)
0.602
ш1/2" (ш12.7)
1.38
ш5/8" (ш15.88)
1.99
ш3/4" (ш19.05)
2.78
ш7/8" (ш22.22)
3.93
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.
* If the existing tubing is used, and the amount of on-site additional
refrigerant charge exceeds the value listed below, then change the
size of the tubing to reduce the amount of refrigerant.
Max. additional charge for 1 outdoor unit
: 62 lbs
Max. additional charge for 2 outdoor units : 111 lbs
Max. additional charge for 3 outdoor units : 133 lbs
Unit: ft.
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