17
Table 9 — Outdoor Unit Connecting Pipe
Table 10 — Oil Balancing Pipe Between Outdoor Unit
Table 11 — Main Pipe Selection
Table 12 — Branch Piping and Branch Joint Combinations for Indoor Units
Table 13 — Indoor Unit Connection Pipe
Table 14 — Outdoor Unit Connection Pipe
Table 15 — Branch Piping
38VMAH UNIT SIZE
GAS SIDE (in.)
LIQUID SIDE (in.)
072
7
/
8
1
/
2
096
7
/
8
1
/
2
120
1
-1
/
8
5
/
8
144
1
-1
/
8
5
/
8
OUTDOOR UNIT CAPACITY (kBtu/h)
BALANCING PIPE (in.)
168 and above
1
/
4
OUTDOOR UNIT CAPACITY
(kBtu/h)
SIZE OF THE MAIN PIPE WHEN THE
EQUIVALENT LENGTH OF LIQUID PIPE IS
< 295 FT
SIZE OF THE MAIN PIPE WHEN THE EQUIVALENT
LENGTH OF LIQUID PIPE IS > 295 FT
Gas Side (in.)
Liquid Side
(in.)
First Branch
Joint
Gas Side (in.)
Liquid Side
(in.)
First Branch
Joint
72
7
/
8
3
/
8
40VM900032
7
/
8
1
/
2
40VM900032
96
7
/
8
3
/
8
40VM900032
1-
1
/
8
1
/
2
40VM900033
120~144
1-
1
/
8
1
/
2
40VM900033
1-
1
/
8
5
/
8
40VM900033
168~240
1-
1
/
8
5
/
8
40VM900033
1-
3
/
8
3
/
4
40VM900034
264~312
1-
3
/
8
3
/
4
40VM900033
1-
3
/
8
7
/
8
40VM900034
336~432
1-
3
/
8
3
/
4
40VM900033
1-
5
/
8
7
/
8
40VM900035
TOTAL CAPACITY CODE OF INDOOR UNIT
AT DOWNSTREAM SIDE
INDOOR UNIT MAIN PIPE
Gas Side (in.)
Liquid Side (in.)
Below 56
5
/
8
3
/
8
56 to 78
3
/
4
3
/
8
78 to 112
7
/
8
3
/
8
112 to 156
1-
1
/
8
1
/
2
156 to 224
1-
1
/
8
5
/
8
224 to 314
1-
3
/
8
3
/
4
314 to 460
1-
5
/
8
3
/
4
460 and above
1-
5
/
8
7
/
8
INDOOR UNIT CAPACITY (kBtu/h)
PIPING LENGTH
≤
33 ft
˃
33 ft
Gas Side (in.)
Liquid Side (in.)
Gas Side (in.)
Liquid Side (in.)
7 to 18
1
/
2
1
/
4
5
/
8
3
/
8
24 to 54
5
/
8
3
/
8
3
/
4
1
/
2
72
3
/
4
3
/
8
7
/
8
1
/
2
96
7
/
8
3
/
8
1-
1
/
8
1
/
2
OUTDOOR UNIT CAPACITY (kBtu/h)
BRANCH JOINT
144 - 264
40WA900021
288 - 432
40WA900022
TOTAL CAPACITY CODE OF INDOOR UNIT AT DOWNSTREAM SIDE (kBtu/h)
BRANCH JOINT
Below 56
40VM900031
56 to 78
40VM900031
78 to 112
40VM900032
112 to 156
40VM900033
156 to 224
40VM900033
224 to 314
40VM900034
314 to 460
40VM900035
460 and above
40VM900035
