
9
Table 8 — 38AUD Piping Recommendations (Dual-Circuit)
LEGEND
Table 9 — 38AUDC12 Hot Gas Bypass Piping Recommendations (Dual-Circuit)
NOTES:
1. 38AUDC units re
q
uire TWO sets of refrigeration piping.
2. For applications with e
q
uivalent length greater than 188 ft. (57 m.)
and/or linear length greater than 125 ft. (38 m.), contact your local
Carrier representative.
MODEL AND
NOMINAL
CAPACITY
LINEAR LINE
(ft (mm))
0 - 25
(0-8)
25 - 50
50 - 75
75 - 100
100 - 125
125 - 150
150 - 175
175 - 200
EQUIV. LINE
(FT (MM))
0 - 38
38 - 75
75 - 113
113 - 150
150 - 188
188 - 225
225 - 263
263 - 300
38AUD--12
Liquid Line Size (in.)
3
/
8
"
3
/
8
"
3
/
8
"
3
/
8
"
1
/
2
"
3
/
8
"
1
/
2
"
3
/
8
"
1
/
2
"
1
/
2
"
5
/
8
"
1
/
2
"
5
/
8
"
Liquid PD (F)
1.4
2.7
5.5
5.5
0.9
6.9
1.1
8.2
1.4
1.6
0.5
1.8
0.5
Max Lift (ft)
25
50
75
82
100
66
125
49
133
130
144
128
144
Max Lift PD (F)
3.4
6.8
10.2
12.1
9.0
12.1
11.2
12.1
12.1
12.1
12.1
12.1
12.1
Suction Line Size (in.)
3
/
4
"
7
/
8
"
7
/
8
"
7
/
8
"
1
1
/
8
"
7
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
Suction Ln PD
(F) (Cap Red)
1.4
1.2
1.8
2.5
(-0.8%)
0.8
3.1
(-1.9%)
0.9
1.1
1.3
1.5
Charge (lb)
9.0
10.0
11.0
12.1
15.7
13.1
17.7
14.9
19.6
21.5
28.2
23.5
31.0
#/TR
0.73
0.81
0.89
0.97
1.27
1.05
1.42
1.20
1.58
1.74
2.27
1.89
2.50
38AUD--14
Liquid Line Size (in.)
3
/
8
"
3
/
8
"
3
/
8
"
3
/
8
"
1
/
2
"
3
/
8
"
1
/
2
"
1
/
2
"
1
/
2
"
5
/
8
"
1
/
2
"
5
/
8
"
Liquid PD (F)
2.1
4.1
6.2
8.2
1.5
10.3
1.8
2.2
2.6
0.7
2.9
0.8
Max Lift (ft)
128
50
75
69
155
42
125
145
140
163
135
162
Max Lift PD (F)
4.0
8.1
12.1
13.6
9.4
13.6
11.7
13.6
13.6
13.6
13.6
13.6
Suction Line Size (in.)
7
/
8
"
7
/
8
"
7
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
1
1
/
8
"
Suction Ln PD
(F) (Cap Red)
1.0
1.9
2.9
(-1.5%)
0.8
1.1
1.4
1.6
1.9
2.2
(-0.3%)
0.7
Charge (lb)
17.0
18.0
19.0
19.5
20.6
23.7
21.8
25.7
27.6
29.5
36.2
31.5
39.0
#/TR
1.36
1.44
1.52
1.56
1.65
1.90
1.74
2.05
2.21
2.36
2.89
2.52
3.12
#/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 > 2°F
Liquid PD (F)
—
Li
q
uid line pressure drop, saturated temperature, degrees F
Max Lift
—
Maximum li
q
uid lift (Indoor unit ABOVE outdoor unit only), at maximum permitted pressure drop.
Max Lift PD (F)
—
Pressure drop including Maximum li
q
uid lift value
ODA
—
Outdoor Air
SC
—
Sub-cooling, degrees F (at li
q
uid line valve)
SST
—
Saturated Suction Temperature
Suction Ln PD (F)
—
Suction Line Pressure Drop, saturated temperature, degree F
TC
—
Total Capacity, MBH (at 45°F Saturated suction, 95°F outdoor air temp)
MODEL AND
NOMINAL
CAPACITY
Linear Line (ft (mm))
0-25 (0-8)
25-50 (8-15)
50-75 (15-23)
75-100 (23-30)
100-125 (30-38)
Equiv. Line (ft (mm))
0-38 (0-12)
38-75 (12-23)
75-113 (23-34)
113-150 (34-46)
150-188 (46-57)
38AUDA/B12
Liquid Line Size (in.)
3
/
8
3
/
8
3
/
8
3
/
8
1
/
2
3
/
8
1
/
2
Pressure Drop (°F)
1.8
3.5
5.2
8.7
1.2
8.7
1.5
Max Lift (ft)
25
50
57
65
100
62
125
Pressure Drop (°F)
3.8
7.5
11.3
12.2
9.4
13.7
11.7
Suction Line Size (in.)
Circuit 1:
Vapor riser required, not greater than 20 ft (6.1 m) — See Fig. 5
Tube S
5
/
8
in
.
1
1
/
8
in
.
1
3
/
8
in
.
1
3
/
8
in
.
1
3
/
8
in
.
Tube A
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
Pressure Drop (°F)
2.0
2.0
1.9
2.0
2.0
Circuit 1:
Vapor riser greater than 20 ft (6.1 m) — See Fig. 6
Tube S
5
/
8
in
.
7
/
8
in
.
Tube A
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
Tube B
NR
1
/
2
in
.
5
/
8
in
.
5
/
8
in
.
5
/
8
in
.
Pressure Drop (°F)
1.6
1.7
1.7
2.1
Circuit 1:
No vapor riser required
7
/
8
in
.
7
/
8
in
.
1
1
/
8
in
.
1
1
/
8
in
.
1
1
/
8
in
.
Circuit 2:
7
/
8
in
.
7
/
8
in
.
1
1
/
8
in
.
1
1
/
8
in
.
1
1
/
8
in
.
Pressure Drop (°F)
1.1
2.1
0.9
1.2
1.5
Charge (lb) 1/2
13.3
14.3
15.8
16.9
20.0
18.1
22.0
Summary of Contents for Gemini 38AU07 Series
Page 5: ...5 Fig 3 38AUD Z 07 14 Base Unit Dimensions ...
Page 19: ...19 Fig 17 Typical Single Circuit Single Stage 38AUZ Wiring Diagrams ...
Page 20: ...20 Fig 18 Typical Single Circuit Two Stage 38AUZ Wiring Diagram ...
Page 21: ...21 Fig 19 Typical Dual Circuit Two Stage 38AUD Wiring Diagram ...
Page 30: ...30 Fig 30 38AUZD E08 Charging Chart RTPF 7 5 Ton Dual Stage Charging Chart R 410A Refrigerant ...
Page 48: ......
Page 49: ......