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PIPING RECOMMENDATION
38AUMZ07-08 PIPING RECOMMENDATION (SINGLE CIRCUIT UNIT)
Model
Liquid Line
Max Lift (ft)
38AUMZ07
Suction Line
Charge (Ibs)
Liquid Line
Max Lift (ft)
38AUMZ08
Suction Line
Charge (Ibs)
38AUMD12-16 PIPING RECOMMENDATION (DUAL CIRCUIT UNIT)
Model
Liquid Line
Max Lift (ft)
38AUMD12
Suction Line
Charge (Ibs)
Liquid Line
Max Lift (ft)
38AUMD14
Suction Line
Charge (Ibs)
Liquid Line
Max Lift (ft)
38AUMD16
Suction Line
Charge (Ibs)
Legend:
Equivalent: Length Equivalent tubing length, including effects of refrigeration specialties devices
Linear Length: Linear tubing length, feet
Liquid Line: Tube size, inches OD.
Suction Line: Tube size, inches OD
Max Lift: Maximum liquid lift (indoor unit ABOVE outdoor unit only), at maximum permitted liquid line pressure drop:
• Linear Length Less than 75 ft (23 m): Minimum 2.0° F subcooling entering TXV
• Linear Length Greater than 75 ft (23m): Minimum 0.5° F subcooling entering TXV
Charge Charge Quantity, lbs. Calculated for both liquid line sizes (where applicable), but only with larger suction line
size (where applicable)
DNU Do Not Use (pressure drop exceeds available subcooling in this model)
NOTE: For applications with equivalent length greater than 188 ft (57 m) and/0r linear length greater than 125 ft (38 m),
contact your local Carrier representative.
Equivalent Length
Ft
0-38
m
0-12
Linear Length
Ft
0-25
m
0-8
3/8
25
7/8
12.8
1/2
25
7/8
13.7
Equivalent Length
Ft
0-38
m
0-12
Linear Length
Ft
0-25
m
0-8
3/8
25
7/8
11.7/11.7 12.7/12.7 14.2/14.2 15.3/15.3 16.5/16.5
3/8
25
7/8
15.4/16.3 16.4/17.3 20.2/21.1
1/2
25
7/8
20.9/19.3 21.9/20.3 25.7/24.1 24.5/22.9 25.7/24.1
38-75
75-113
113-150
12-23
23-34
34-46
25-50
50-75
75-100
8-15
15-23
23-30
3/8
3/8
50
75
7/8
7/8
13.9
17.0
1/2
1/2
50
75
7/8
7/8
14.8
16.8
38-75
75-113
113-150
12-23
23-34
34-46
25-50
50-75
75-100
8-15
15-23
23-30
3/8
3/8
50
75
7/8
7/8
3/8
3/8
50
75
7/8
7/8
19/19.9
1/2
1/2
50
75
7/8
7/8
Page 29
150-188
46-57
100-125
30-38
3/8
3/8
100
125
7/8
7/8
18.8
20.6
1/2
1/2
100
93
7/8
7/8
18.9
20.6
150-188
46-57
100-125
30-38
3/8
3/8
83
62
7/8
7/8
3/8
3/8
54
45
7/8
7/8
20.2/21.1
1/2
1/2
54
45
7/8
7/8
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