Carrier 38AU User Manual
Page 11
11
Table 5 — 38AUZ 07-08 Piping Recommendations (Single-Circuit Unit)
Table 6 — 38AUD 12-14 Piping Recommendations (Two-Circuit Unit)
Table 7 — 38AU Maximum Suction Pipe Size
R-410A
Equivalent Length
Ft
0-38
38-75
75-113
113-150
150-188
m
0-12
12-23
23-34
34-46
46-57
Model
Typ Linear ft
0-25
25-50
50-75
75-100
100-125
38AUZ*07
Liquid Line
3
/
8
3
/
8
1
/
2
1
/
2
1
/
2
5
/
8
1
/
2
5
/
8
Max Lift
25
42
50
75
90
100
86
101
Suction Line
7
/
8
1-
1
/
8
7
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
Charge (lbs)
8.4
9.6
11.1
13.1
15.0
18.8
16.9
22.6
38AUZ*08
Liquid Line
1
/
2
1
/
2
1
/
2
1
/
2
1
/
2
Max Lift
25
50
75
100
112
Suction Line
7
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
Charge (lbs)
11.8
9.6
12.9
16.8
18.7
Legend:
Length Equiv
Equivalent tubing length, including effects of refrigeration specialties devices
Liquid Line
Tubing size, inches OD.
Max Lift
Cooling
Heating
Maximum liquid lift at maximum permitted liquid line pressure drop
• Indoor unit ABOVE outdoor unit
• Indoor unit BELOW outdoor unit
Suction Line
Tube size, inches OD
Charge
Charge Quantity, lbs. Calculated for both liquid line sizes (where applicable), but only with larger suction line size (where
applicable)
NOTE:
For applications with linear length greater than 100 ft (30.5 m), contact your local Carrier representative.
NOTE: 38AUD requires TWO sets of refrigeration piping
R-410A
Equivalent Length
Ft
0-38
38-75
75-113
113-150
150-188
m
0-12
12-23
23-34
34-46
46-57
Model
Typ Linear ft
0-25
25-50
50-75
75-100
100-125
38AUD*12
Liquid Line
3
/
8
3
/
8
3
/
8
1
/
2
1
/
2
1
/
2
Max Lift
25
50
28
75
100
99
Suction Line
7
/
8
7
/
8
1
1
/
8
1
1
/
8
1
1
/
8
Charge ea. (lbs) 7.1
8.1
9.6
11.9
13.8
15.8
38AUD*14
Liquid Line
3
/
8
3
/
8
3
/
8
1
/
2
1
/
2
1
/
2
Max Lift
25
50
48
75
100
122
Suction Line
7
/
8
7
/
8
1
1
/
8
1
1
/
8
1
1
/
8
Charge ea. (lbs) 9.7
10.7
12.2
14.5
16.4
18.4
Legend:
Length Equiv
Equivalent tubing length, including effects of refrigeration specialties devices
Liquid Line
Tubing size, inches OD.
Max Lift
Cooling
Heating
Maximum liquid lift at maximum permitted liquid line pressure drop
• Indoor unit ABOVE outdoor unit
• Indoor unit BELOW outdoor unit
Suction Line
Tube size, inches OD
Charge
Charge Quantity, lbs. Calculated for both liquid line sizes (where applicable), but only with larger suction line size (where
applicable)
NOTE:
For applications with linear length greater than 100 ft (30.5 m), contact your local Carrier representative.
Model:
Unit Size
Maximum Tube Size
38AUZ
07
1
3
/
8
08
1
5
/
8
38AUD
12
1
3
/
8
14
1
5
/
8