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Table 2 — CAS (Dual Circuit) with F*S/H or F*X
MODEL NUMBERS
CAS123 — F*X120
CAS153 — F*S/H150
The Model CAS123/153 is a dual-circuit unit design that re-
quires two sets of refrigeration piping between the outdoor
unit and the evaporator 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
CAS123/153 CANNOT be connected to a single-circuit
evaporator coil. The Model CAS123/153 CANNOT be field-
converted to a single-circuit design. See Table 3.
Before unpacking this new CAS model, compare the evapo-
rator coil design to the CAS model.
MODEL SERIES
Position Number
C = R-410A Condensing Unit
A = Air Conditioning (Cooling Only)
S= Standard Efficiency
072 = 6 Tons (2 stages)
091 = 7.5 Tons (2 stages)
121 = 10 Tons (2 stages)
123 = 10 Tons (3 stages)
151 = 12.5 Tons (2 stages)
153 = 12.5 Tons (3 stages)
H = 208/230-3-60
L = 460-3-60
S = 575-3-60
G = Single Circuit / Dual Stage (072/091 only)
H = Single Circuit / Dual Stage with Low Ambient Controller (072/091 only)
M = Single Circuit / Dual Stage (121/151 only)
N = Single Circuit with Low Ambient Controller (121/151 only)
T = Dual Circuit (123/153 only)
U = Dual Circuit with Low Ambient Controller (123/153 only)
A = Al/Cu
B = Precoat Al/Cu
C = E−Coat Al/Cu
E = Cu/Cu
M = Al/Cu with Louvered Hail Guards
N = Precoat Al/Cu with Louvered Hail Guards
P = E−Coat Al/Cu with Louvered Hail Guards
R = Cu/Cu with Louvered Hail Guards
0 = None
1 = Un-powered Convenience Outlet
A = None
C = Non-Fused Disconnect
0 = Electro-Mechanical Controls (standard)
0 = Not Used
A = Standard
B = LTL (includes full corrugated sleeve wrapped around unit perimeter and full corrugated top cover)
1
CAS121/151 models with M/N in the 8th digit meet Department of Energy (DOE) 2023 IEER requirements.
CAS-072-153-01SI Rev. A
FULL LOAD AIRFLOW (CFM)
4000
4400
C
A
S
1
2
Type
Efficiency
Nominal Cooling Capacity
1
1
Fig. 1 — Model Number Nomenclature
Specifications subject to change without notice.
Table 3 — Evaporator Coil Connections
EVAPORATOR COIL
HAS
Single Circuit
Two Circuits
Matching CAS Model to Evaporator Coil
The CAS072/091/121/151 units have a single-circuit de-
sign, requiring one set of refrigeration piping. This model
can be connected to an evaporator coil with one circuit or
with two circuits (by manifolding the evaporator connections
into a single piping system).
0
9
0
H
3
4
5
6
7
Voltage
Refrigerant Options
CONNECT TO
NOTES
MODEL
072/091/121/151
ONLY
Manifold evaporator
072/091/121/151
circuits into single piping
system.
Use two separate piping
123/153
systems
G
A
0
A
0
8
9
10
11
12
Base Unit Controls
Not Used
—
0
A
13
14
Packaging
3
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