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