Tubing Size - Sanyo R410A Installation Instructions Manual

1-6. Tubing Size

Table 1-3 Main Tubing Size (LA)
BTU/h
(kW)
Total system horsepower
Combined outdoor units
Suction tubing
Discharge tubing
Liquid tubing
*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...)
Below BTU/h
Total capacity
after distribution
Over BTU/h
Suction tubing
Tubing size Discharge tubing
Liquid tubing
Below BTU/h
Total capacity
after distribution
Over BTU/h
Suction tubing
Discharge tubing
Tubing size
Liquid tubing
Table 1-5 Outdoor Unit Tubing Connection Size (
BTU/h 72,000
(kW) (21.1)
(o19.05) *
Suction tubing
Discharge
(o15.88)
tubing
o3/8" (o9.52)
Liquid tubing
Balance tubing
72,000 96,000 144,000
(21.1) (28.1) (42.2)
8 10 16
8 10 8
8
o7/8"
(o22.22)
o5/8" o3/4"
(o15.88) (o19.05)
o3/8" o1/2"
(o9.52) (o12.7)
24.200
54.600
(2.5 hp) (6 hp)
24.200
–
(2.5 hp)
ø5/8" ø3/4"
(ø15.88) (ø19.05)
ø1/2" ø5/8"
(ø12.70) (ø15.88)
ø3/8" ø3/8"
(ø9.52) (ø9.52)
258.000 334.400
(27 hp) (35 hp)
238.900 258.000
(25 hp) (27 hp)
ø1-3/8" ø1-3/8"
(ø34.92) (ø34.92)
ø1-1/8" ø1-1/8"
(ø28.58) (ø28.58)
ø3/4" ø3/4"
(ø19.05) (ø19.05)
96,000
(28.1)
o3/4" * 1 o7/8" *
1
(o22.22) *
Brazing connection
o5/8" o3/4"
(o19.05)
Brazing connection
o3/8" (o9.52)
Flare connection
o3/8" (o9.52)
Flare connection
Unit: in. (mm)
168,000 192,000 216,000
(49.2) (56.2) (63.3)
18 20
10 10
8 10
o1-1/8"
(o28.58)
o7/8"
(o22.22)
o5/8"
(o15.88)
102.400 124.200
85.300
(9 hp)
(11 hp) (13 hp)
102.400
85.300
54.600
(9 hp) (11 hp)
(6 hp)
ø3/4" ø7/8" ø1-1/8"
(ø19.05) (ø22.22) (ø28.58)
ø5/8" ø3/4" ø3/4"
(ø15.88) (ø19.05) (ø19.05)
ø3/8" ø3/8" ø1/2"
(ø9.52) (ø9.52) (ø12.70)
–
*1: The outdoor unit connection tubing (LO) is
334.400
determined by the total capacity of the outdoor
(35 hp)
ø1-1/2"
units connected to the tube ends. The tubing
(ø38.10)
size is selected based on the table of main
ø1-1/8"
tube sizes after the branch.
(ø28.58)
*2: If the total capacity of the indoor units con-
ø3/4"
nected to the tube ends is different from the
(ø19.05)
total capacity of the outdoor units, then the
– )
main tube size is selected based on the total
A D
capacity of the outdoor units.
(For LA, LB, and LF in particular)
2
2
*1 If the size of tubing (LA) is less than 16.4 feet,
it is recommended that the tubing diameter be
larger than 7/8" (
Ø
*2 If the size of tubing (LA) is less than 16.4 feet,
it is recommended that the tubing diameter be
larger than 1-1/8" (
Ø
9
Unit: in. (mm)
240,000 264,000
(70.3) (77.3)
24 26 28
8 10 10
8 8 10
8 8 8
o1-3/8"
(o34.92)
o1-1/8"
(o28.58)
o3/4"
(o19.05)
143.300 162.400
(15 hp) (17 hp)
124.200 143.300
(13 hp) (15 hp)
ø1-1/8" ø1-1/8"
(ø28.58) (ø28.58)
ø7/8" ø7/8"
(ø22.22) (ø22.22)
ø1/2" ø1/2"
(ø12.70) (ø12.70)
22.22).
Ø
28.58).
Ø
288,000
(84.3)
30
10
10
10
Unit: in. (mm)
hp = horsepower
200.600
238.900
(21 hp)
(25 hp)
200.600
162.400
(17 hp) (21 hp)
ø1-1/8" ø1-1/8"
(ø28.58) (ø28.58)
ø7/8" ø1-1/8"
(ø22.22) (ø28.58)
ø5/8" ø5/8"
(ø15.88) (ø15.88)