Table of Contents
Advertisement
Identify Factory Options
Factory options will affect 38AU unit pipe sizing selections.
Coil type impacts liquid lift limits; Check this unit's Model Num-
ber against the Model Number Nomenclature, Fig. 1. Determine
the significance of this unit's values in Position 11 (Coil type). For
date of unit manufacture see Serial Number Nomenclature, see
Fig. 2.
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).
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
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
A = None
1
B = Low Ambient
1
T = Dual Circuit / Three Cooling Stages
U = Dual Circuit / Three Cooling Stages with Low Ambient
Nominal Tonnage
16 = 15 Tons
25 = 20 Tons
28 = 25 Tons
2
Not Used
A = Not Used
Not Used
0 = Not Used
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
POSITION NUMBER
TYPICAL
1
2
3
4
5
6
7
8
3 8 A U D T 2 5 A 0 A 6 – 0 A 0 A 0
Fig. 1 — Model Number Nomenclature
1
2
3
0
5
2
POSITION
1−2
3−4
5
6−10
Fig. 2 — Serial Number Nomenclature
3
connected to a single-circuit evaporator coil. The Model 38AUD
CANNOT be field-converted to a single-circuit design. See
Table 3.
Table 3 — Evaporator Coil Connections
EVAPORATOR COIL
CONNECT TO
HAS
MODEL
Single Circuit
38AUZ ONLY
38AUZ
Two Circuits
38AUD
Before unpacking this new 38AU model, compare the evaporator
coil design to the 38AU model.
General
For unit dimensions and corner weights see Fig. 3 and 4. For phys-
ical data see Tables 4 and 5.
9
10 11 12 13 14 15 16 17 18
Not Used
A = Place Holder
Base Unit Controls
0 = Electro-Mechanical Controls
Design Rev
– = Initial Release
Voltage
1 = 575/3/60
5 = 208-230/3/60
6 = 460/3/60
1
38AUZ 16 and 25 units only.
38AUD units only.
2
4
5
6
7
2
9
1
2
DESIGNATES
Week of manufacture (fiscal calendar)
Year of manufacture ("23" = 2023)
Manufacturing location
Sequence number
NOTES
—
Manifold evaporator circuits
into single piping system.
Use two separate piping
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
8
9
10
3
4
5
Advertisement
Table of Contents
