Sanyo R410A - Equivalent Length of Joints for Tubing; Additional Refrigerant Charge Calculation

10
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 1-8 Straight Equivalent Length of Joints
Table 1-9 Refrigerant tubing (Existing tubing can be used.)
Tubing size (in. (mm))
Material O Material 1/2H • H
ø1/4" (ø6.35) t1/32 (t0.8)
ø3/8" (ø9.52) t1/32 (t0.8) ø1-1/8" (ø28.58) t5/128 (t1.0)
ø1/2" (ø12.7) t1/32 (t0.8) ø1-1/4" (ø31.75) t3/64 (t1.1)
ø5/8" (ø15.88) t5/128 (t1.0) ø1-1/2" (ø38.10) over t3/64 (t1.15)
ø3/4" (ø19.05)
over t5/128 (t1.0) ø1-5/8" (ø41.28) over t3/64 (t1.20)
ø7/8" (ø22.22) t5/128 (t1.0)
* 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 and a type of outdoor unit as follows.
Required amount of additional refrigerant charge =
[ (Amount of additional refrigerant charge per ft. of
each size of liquid tube × its tube length) + (...) + (...)]
+ [(Necessary amount of additional refrigerant charge
per outdoor unit + (...) + (...)]
* Always charge accurately using a scale for weighing.
*1: For the solenoid valve kits, use type 160 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
Table 1-7 Indoor Unit Tubing Connection Size ( 1 – 40)
Unit: in. (mm)
Distribution
joint-solenoid
valve kit tubing
Solenoid valve
kit-Indoor
unit tubing
connection
Discharge tubing
Liquid tubing
Suction tubing
Indoor unit type
Total system horsepower
7 9 12 15 18 19 24 36 48 54
0.8 1 1.3 1.7 2 2.1 3 4 5 5.5
o5/8" (o15.88)
o1/2" (o12.7)
o3/8" (o9.52)
Gas tubing
Liquid tubing
o1/2" (o12.7)
o1/4" (o6.35)
o5/8" (o15.88)
o3/8" (o9.52)
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 o elbow
1 ft.
(0.30 m)
1.1 ft.
(0.35 m)
1.4 ft.
(0.42 m)
1.6 ft.
(0.48 m)
1.7 ft.
(0.52 m)
1.9 ft.
(0.57 m)
2.3 ft.
(0.70m)
2.6 ft.
(0.79 m)
45 o elbow
0.8 ft.
(0.23 m)
0.9 ft.
(0.26 m)
1 ft.
(0.32 m)
1.2 ft.
(0.36 m)
1.3 ft.
(0.39 m)
1.4 ft.
(0.43 m)
1.7 ft.
(0.53 m)
1.9 ft.
(0.59 m)
U-shape tube bent
(R2–23/64–3–15/16 in.)
3 ft.
(0.90 m)
3.4 ft.
(1.05 m)
4.1 ft.
(1.26 m)
4.7 ft.
(1.44 m)
5.1 ft.
(1.56 m)
5.6 ft.
(1.71 m)
6.9 ft.
(2.10 m)
7.8 ft.
(2.37 m)
T r ap bend
7.5 ft.
(2.30 m)
9.2 ft.
(2.80 m)
10.5 ft.
(3.20 m)
12.5 ft.
(3.80 m)
14.1 ft.
(4.30 m)
15.4 ft.
(4.70 m)
16.4 ft.
(5.00 m)
14.0 ft.
(5.80 m)
Y -br anch distr ib ution joint Equiv alent length con v ersion not needed.
Ball v alv e f or ser vice Equiv alent length con v ersion not needed.
Table 1-10-1 Amount of Refrigerant Charge Per ft.,
According to Liquid Tubing Size
Liquid tubing
size
ø1/4"
(ø6.35)
ø3/8"
(ø9.52)
ø1/2"
(ø12.7)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
Amount of
refrigerant
charge (oz/ft.)
0.279 0.602 1.38 1.99 2.78 3.93
Table 1-6 Refrigerant Charge Amount at Shipment (for outdoor unit)
DC
CHDZ07263 CHDZ09663
CHDZR07263 CHDZR09663
(oz)
416 416
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