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Table 2 — 38AUD with 40RF/40RU
MODEL NUMBERS
38AUDT/U12 — 40RF*A12
38AUDT/U14 — 40RU*A14
The Model 38AUD is a dual-circuit unit design that requires two
sets of refrigeration piping between the outdoor unit and the evap-
orator coil (or coils). This model can only be connected to an
evaporator coil that has two refrigeration circuits (or to two
separate evaporator coils). The Model 38AUD CANNOT be
connected to a single-circuit evaporator coil. The Model 38AUD
CANNOT be field-converted to a single-circuit design. See
Table 3.
Before unpacking this new 38AU model, compare the evaporator
coil design to the 38AU model.
Model Type
38AU = Carrier Condensing Unit
®
Puron
R--- 410A Refrigerant
Type of Coil
Z = Single Circuit, A/C Scroll Compressor
D = Dual Circuit, A/C Scroll Compressor
Refrigerant Options
D = Single Circuit / 2-Stage
E = Single Circuit / 2-Stage with Low Ambient
M = Single Circuit / 2-Stage
N = Single Circuit / 2-Stage with Low Ambient
T = Dual Circuit / Three Cooling Stages
U = Dual Circuit / Three Cooling Stages with Low Ambient
Nominal Tonnage
07 = 6 Tons
08 = 7.5 Tons
12 = 10 Tons
14 = 12.5 Tons
Not Used
A = Not Used
Not Used
0 = Not Used
1
38AUZ 07/08 models only.
2
38AUZ 12/14 models meet Department of Energy 2023 IEER requirements.
3
38AUD 12/14 models only.
POSITION NUMBER
TYPICAL
FULL LOAD AIRFLOW (CFM)
4000
4400
1
2
3
4
5
3 8 A U D T 1
1
1
2
2
3
3
Fig. 1 — Model Number Nomenclature
1
2
0
5
POSITION
1−2
3−4
5
6−10
Fig. 2 — Serial Number Nomenclature
Table 3 — Evaporator Coil Connections
EVAPORATOR COIL
HAS
Single Circuit
Two Circuits
Matching 38AU Model to Evaporator Coil
The Model 38AUZ is a single-circuit unit design, requiring one set
of refrigeration piping. This model can be connected to an evapo-
rator coil with one circuit or with two circuits (by manifolding the
evaporator connections into a single piping system).
6
7
8
9
10 11 12 13 14 15 16 17 18
2 A 0 A 6 A 0 A 0 A 0
Design Rev
A = Initial Release
B = 38AUZ(D,E)08 only
Voltage
1 = 575/3/60
5 = 208/ 230/3/60
6 = 460/3/60
Coil Options (RTPF)
A = Cu/Al
B = Precoat (Cu/Al)
C = E-Coat (Cu/Al)
E = Cu/Cu
M = Cu/Al with Louvered Hail Guard
N = Precoat (Cu/Al) with Louvered Hail Guard
P = E-Coat (Cu/Al) with Louvered Hail Guard
R = Cu/Cu with Louvered Hail Guard
3
4
5
6
2
2
9
1
DESIGNATES
Week of manufacture (fiscal calander)
Year of manufacture ("22" = 2022)
Manufacturing location
Sequence number
3
CONNECT TO
NOTES
MODEL
38AUZ ONLY
Manifold evaporator circuits
38AUZ
into single piping system.
Use two separate piping
38AUD
systems
Packaging
0 = Standard
1 = LTL
Electrical Options
A = None
C = Non-Fused Disconnect
Service Options
0 = None
1 = Un-powered Convenience Outlet
2 = Powered Convenience Outlet
Not Used
A = Place Holder
Base Unit Controls
0 = Electro-Mechanical Controls
7
8
9
2
3
4
—
10
5
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