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Table 6 – 38AUD 12-14 50Hz Piping Recommendations (Two-Circuit Unit)
NOTE: 38AUD requires TWO sets of refrigeration piping
R ---410A
Equivalent Length
meter
0--- 12
feet
0--- 38
Linear Length
meter
0--- 7.5
feet
0--- 25
Model
3
38AUD*12
Liquid Line
Max Lift
SI (m)
Novation
7.5
RTPF
7.5
EN (ft)
Novation
25
RTPF
25
7
Suction Line
Charge
SI (kg)
Novation
3.3
RTPF
4.9
EN (lbs)
Novation
7.3
RTPF
10.9
3
38AUD*14
Liquid Line
Max Lift
SI (m)
Novation
7.5
EN (ft)
Novation
25
7
Suction Line
Charge
SI (kg)
Novation
4.6
EN (lbs)
Novation
10.1
Legend:
Equivalent
Equivalent tubing length, including effects of refrigeration specialties devices
Length
Linear Length
Linear tubing length, feet
Liquid Line
Tubing size, inches OD.
Max Lift
Maximum liquid lift (indoor unit ABOVE outdoor unit only), at maximum permitted liquid line pressure drop
S Linear Length Less than 30 m (100 ft): Minimum 1.1° C (2.0° F) subcooling entering TXV
S Linear Length Greater than 30 m (100 ft): Minimum 0.3° C (0.5° F) subcooling entering TXV
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)
DNU
Do Not Use (pressure drop exceeds available subcooling in this model)
NR
Not Recommended (use smaller liquid tube size)
SI
Metric units of measure
EN
English units of measure (I---P)
NOTE:
For applications with equivalent length greater than 57 m (188 ft) and/or linear length greater than 38 m (125 ft),
contact your local Carrier representative.
12--- 23
38--- 75
7.5--- 15
25--- 50
3
/
/
8
8
15
15
50
50
7
/
/
8
8
3.8
5.4
8.3
11.9
1
5
/
/
/
8
2
8
13
15
45
50
7
/
/
8
8
5.8
6.6
12.7
14.6
13
23--- 34
34--- 46
75--- 113
113--- 150
15--- 23
23--- 30
50--- 75
75--- 100
3
1
3
1
/
/
/
/
8
2
8
2
15
23
10
24
15
23
10
27
50
75
36
79
50
75
36
89
7
7
/
/
8
8
4.2
5.3
4.7
6.1
5.8
6.9
6.3
7.7
9.3
11.6
10.3
13.4
12.9
15.2
13.9
17.0
1
5
1
5
/
/
/
/
2
8
2
8
12
14
11
14
42
49
39
48
7
1
/
1---
/
8
8
6.6
7.8
7.6
10.7
14.5
17.3
16.8
23.5
46--- 57
150--- 188
30--- 38
100--- 125
3
1
/
/
8
2
13
29
11
32
44
96
39
106
1
1---
/
8
5.1
6.9
6.8
8.6
11.3
15.2
14.9
18.8
1
5
/
/
2
8
17
20
56
68
1
1---
/
8
9.4
12.0
20.7
26.4
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