Sanyo R410A - Refrigerant Tubing Size Selection

9
*1: If future extension is planned, select the tubing diameter based on the total horsepower after extension.
However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø3/8" (ø9.52).
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 295 ft. (equivalent length), increase the main tube (LM) size by 1 rank for the
suction, discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 1-3 and Table 1-9.)
*5: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for
the suction tubes and discharge tubes.
(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table above.)
■
Size of tubing (LO) between outdoor units
Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.
Table 1-4 Main Tubing Size After Distribution (LB, LC...)
*1: The outdoor unit connection tubing (LO) is
determined by the total capacity of the outdoor
units connected to the tube ends. The tubing
size is selected based on the table of main
tube sizes after the branch.
*2: If the total capacity of the indoor units con-
nected to the tube ends is different from the
total capacity of the outdoor units, then the
main tube size is selected based on the total
capacity of the outdoor units.
(For LA, LB, and LF in particular)
1-6. Tubing Size
Table 1-3 Main Tubing Size (LA)
24
192,000
(56.2)
20
o7/8"
(o22.22)
8
72,000
(21.1)
o1/2"
(o12.7)
96,000
(28.1)
10
8
8
10
10
8
8
8
144,000
(42.2)
16
10
8
168,000
(49.2)
18
o3/8"
(o9.52)
216,000
(63.3)
28
240,000
(70.3)
26
10
8
8
10
10
8
264,000
(77.3)
30
10
10
10
288,000
(84.3)
108
BTU/h
(kW)
Total system horsepower
Combined outdoor units
Suction tubing
Discharge tubing
Liquid tubing
(o19.05)
o3/4"
o1-1/8"
(o28.58)
o7/8"
(o22.22)
(o15.88)
o5/8"
o1-3/8"
(o34.92)
o1-1/8"
(o28.58)
o3/4"
(o19.05)
(o15.88)
o5/8"
Unit: in. (mm)
ø3/4"
(ø19.05)
ø1-1/8"
(ø28.58)
ø1-3/8"
(ø34.92)
ø5/8"
(ø15.88)
ø1-1/8"
(ø28.58)
ø1/2"
(ø12.70)
ø1-1/8"
(ø28.58)
ø3/8"
(ø9.52)
ø7/8"
(ø22.22)
ø5/8"
(ø15.88)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø3/8"
(ø9.52)
ø3/8"
(ø9.52)
ø3/8"
(ø9.52)
ø1/2"
(ø12.70)
–
238.900
(25 hp)
200.600
(21 hp)
24.200
(2.5 hp)
24.200
(2.5 hp)
334.400
(35 hp)
85.300
(9 hp)
54.600
(6 hp)
54.600
(6 hp)
85.300
(9 hp)
258.000
(27 hp)
ø3/4"
(ø19.05)
ø1-1/8"
(ø28.58)
ø1-1/2"
(ø38.10)
–
334.400
(35 hp)
ø3/4"
(ø19.05)
ø1-1/8"
(ø28.58)
258.000
(27 hp)
238.900
(25 hp)
102.400
(11 hp)
ø1/2"
(ø12.70)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
102.400
(11 hp)
124.200
(13 hp)
124.200
(13 hp)
Below BTU/h
Over BTU/h
143.300
(15 hp)
ø1/2"
(ø12.70)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø7/8"
(ø22.22)
ø1-1/8"
(ø28.58)
143.300
(15 hp)
162.400
(17 hp)
ø5/8"
(ø15.88)
ø1-1/8"
(ø28.58)
162.400
(17 hp)
200.600
(21 hp)
Total capacity
after distribution
Tubing size
Suction tubing
Liquid tubing
Discharge tubing
hp = horsepower
Unit: in. (mm)
Below BTU/h
Over BTU/h
Total capacity
after distribution
Tubing size
ø1-3/8"
(ø34.92)
Suction tubing
Liquid tubing
Discharge tubing
Table 1-5 Outdoor Unit Tubing Connection Size ( A – D)
o3/8" (o9.52)
o3/8" (o9.52)
72,000
(21.1)
96,000
(28.1)
Flare connection
Brazing connection
Brazing connection
o3/8" (o9.52)
Flare connection
Balance tubing
Liquid tubing
Discharge
tubing
Suction tubing
BTU/h
(kW)
Unit: in. (mm)
*1 If the size of tubing (LA) is less than 16.4 feet,
it is recommended that the tubing diameter be
larger than
Ø7/8" (Ø22.22).
*2 If the size of tubing (LA) is less than 16.4 feet,
it is recommended that the tubing diameter be
larger than Ø1-1/8" (Ø28.58).
o5/8"
(o15.88)
o3/4"
(o19.05)
o3/4"
*
1
(o19.05)
*
1
o7/8"
*
2
(o22.22)
*
2
W-3WAYECO-iU.indb9W-3WAYECO-iU.indb9 2009/11/1318:09:252009/11/1318:09:25