Carrier Gemini 38AU 07 Series Installation, Start-Up And Service Instructions Manual page 9
Air-cooled condensing units with puron r-410a refrigerant
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MODEL &
LINEAR LINE (FT) 0 - 24
NOMINAL
EQUIV. LINE (FT) 0 - 37
CAPACITY
Liquid Line size
Liquid PD (F)
Max Lift (ft)
Max Lift PD (F)
38AUD_12
TC 55.9 Each,
Suction Line size
SC 12.7°F
Suction Ln PD
(F) (Cap Red)
Charge (lb)
#/TR
Liquid Line size
Liquid PD (F)
Max Lift (ft)
Max Lift PD (F)
38AUD_14
TC 69.8 Each,
Suction Line size
SC 14.2°F
Suction Ln PD
(F) (Cap Red)
Charge (lb)
#/TR
Liquid Line size
Liquid PD (F)
Max Lift (ft)
Max Lift PD (F)
38AUD_16
TC 92.9 Each,
Suction Line size
SC 15.1°F
Suction Ln PD
(F) (Cap Red)
Charge (lb)
#/TR
Liquid Line size
Liquid PD (F)
Max Lift (ft)
Max Lift PD (F)
38AUD_25
TC 121.2 Each,
Suction Line size
SC 10.6°F
Suction Line PD
(F) (Cap Red)
Charge (lb)
#/TR
LEGEND
#/TR
—
Charge to unit capacity ratio, lbs per ton (at 45°F
SST, 95°F ODA)
Cap Red
—
Capacity reduction caused by suction line pressure
drop GT 2°F
Liquid PD (F)
—
Liquid line pressure drop, saturated temperature, °F
Max Lift
—
Maximum liquid lift (Indoor unit ABOVE outdoor unit
only), at maximum permitted pressure drop.
Max Lift PD (F)
—
Pressure drop including Maximum liquid lift value
SC
—
Sub-cooling, °F (at liquid line valve)
Suction Line PD (F) —
Suction Line Pressure Drop, Saturated Temperature,
°F
TC
—
Total Capacity, MBH (at 45°F Saturated Suction,
95°F Outdoor Air Temp)
NOTE: 38AUD units require TWO sets of refrigeration piping.
Table 9 — 38AUD Piping Recommendations (Dual-Circuit)
25 - 49
50 - 74
38 - 74
75 - 112
3
/
"
3
/
"
3
/
"
8
8
8
1.4
2.7
5.5
25
50
75
3.4
6.8
10.2
3
/
"
7
/
"
7
/
"
4
8
8
1.4
1.2
1.8
9.0
10.0
11.0
0.73
0.81
0.89
3
/
"
3
/
"
3
/
"
8
8
8
2.1
4.1
6.2
128
50
75
4.0
8.1
12.1
7
/
"
7
/
"
7
/
"
1-
8
8
8
2.9
1.0
1.9
(-1.5%)
17.0
18.0
19.0
19.5
1.36
1.44
1.52
1.56
/
"
/
"
/
"
3
3
3
8
8
8
3.4
6.9
10.3
25
50
32
5.5
11.1
13.0
/
"
/
"
1-
/
"
1-
/
"
7
7
1
1
8
8
8
8
3.1
1.5
0.8
1.2
(-1.9%)
17.0
18.0
18.3
19.5
21.8
1.35
1.43
1.46
1.55
1.73
3
/
"
1
/
"
1
/
"
8
2
2
5.6
2.2
3.3
25
50
64
7.7
6.3
8.5
1-
1
/
"
1-
1
/
"
1-
1
/
"
1-
8
8
8
0.7
1.3
2.0
15.2
17.9
19.8
23.2
1.20
1.41
1.56
1.83
75 - 99
100 - 124
113 - 149
150 - 187
3
/
"
1
/
"
3
/
"
8
2
8
5.5
0.9
6.9
82
100
66
125
12.1
9.0
12.1
11.2
7
/
"
1-
1
/
"
7
/
"
1-
8
8
8
2.5
3.1
0.8
(-0.8%)
(-1.9%)
12.1
15.7
13.1
17.7
0.97
1.27
1.05
1.42
3
/
"
1
/
"
3
/
"
8
2
8
8.2
1.5
10.3
69
155
42
125
13.6
9.4
13.6
11.7
1
/
"
1-
1
/
"
1-
1
/
"
8
8
8
0.8
1.1
1.4
20.6
23.7
21.8
25.7
1.65
1.90
1.74
2.05
/
"
/
"
/
"
1
1
1
2
2
2
1.9
2.6
3.2
75
144
125
8.2
10.9
13.7
1-
/
"
1-
/
"
1-
1
1
8
8
2
1.6
(-0.1%)
23.7
25.7
26.6
1.89
2.04
2.11
5
/
"
1
/
"
5
/
"
1
/
"
8
2
8
2
0.9
4.3
1.2
5.4
75
70
108
55
104
7.1
10.0
9.4
9.9
10.0
3
/
"
1-
1
/
"
1-
3
/
"
1-
1
/
"
1-
8
8
8
8
2.7
3.4
0.7
1.0
(-1.2%)
(-2.4%)
21.7
26.2
23.7
29.3
1.72
2.07
1.87
2.31
9
125 - 149
150 - 174
188 - 224
225 - 262
1
/
"
3
/
"
1
/
"
1
/
"
2
8
2
2
1.1
8.2
1.4
1.6
49
133
130
12.1
12.1
12.1
1
/
"
1-
1
/
"
1-
1
/
"
8
8
8
0.9
1.1
1.3
14.9
19.6
21.5
1.20
1.58
1.74
1
/
"
1
/
"
1
/
"
2
2
2
1.8
2.2
2.6
145
140
13.6
13.6
1-
1
/
"
1-
1
/
"
8
8
1.6
1.9
27.6
29.5
2.21
2.36
/
"
/
"
/
"
1
5
1
2
8
2
3.9
1.0
4.5
127
150
121
14.5
13.6
14.5
/
"
1-
/
"
1-
/
"
1-
/
"
1-
3
1
3
1
8
8
8
8
2.5
2.9
0.7
0.8
(-0.8%)
(-1.5%)
27.6
34.4
29.5
2.19
2.73
2.35
5
/
"
1
/
"
5
/
"
5
/
"
8
2
8
8
1.5
6.5
1.8
2.1
42
100
97
10.0
10.0
10.0
3
/
"
1-
3
/
"
1-
3
/
"
8
8
8
1.2
1.4
1.7
26.7
32.4
35.4
2.11
2.56
2.80
175 - 200
263 - 300
5
/
"
1
/
"
5
/
"
8
2
8
0.5
1.8
0.5
144
128
144
12.1
12.1
12.1
1-
1
/
"
8
1.5
28.2
23.5
31.0
2.27
1.89
2.50
5
/
"
1
/
"
5
/
"
8
2
8
0.7
2.9
0.8
163
135
162
13.6
13.6
13.6
1-
1
/
"
8
2.2
0.7
(-0.3%)
36.2
31.5
39.0
2.89
2.52
3.12
/
"
/
"
/
"
5
1
5
8
2
8
1.2
5.1
1.4
159
112
157
14.5
14.5
14.5
/
"
1-
/
"
3
1
8
8
3.3
1.0
1.1
(-2.2%)
37.4
31.5
40.5
2.97
2.50
3.22
5
/
"
3
/
"
8
4
2.4
1.3
92
107
9.9
10.0
1-
3
/
"
8
1.9
38.5
48.5
3.04
3.83
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