CAS-072-153-01SI Rev. A Specifications subject to change without notice. 3
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.
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).
Fig. 1 — Model Number Nomenclature
Table 2 — CAS (Dual Circuit) with F*S/H or F*X
MODEL NUMBERS FULL LOAD AIRFLOW (CFM)
CAS123 — F*X120 4000
CAS153 — F*S/H150 4400
Table 3 — Evaporator Coil Connections
EVAPORATOR COIL
HAS
CONNECT TO
MODEL
NOTES
Single Circuit
072/091/121/151
ONLY
—
Two Circuits
072/091/121/151
Manifold evaporator
circuits into single piping
system.
123/153
Use two separate piping
systems
MODEL SERIES C A S 0 9 0 H G A 0 A 0 0 A
Position Number
12345678910111213
14
Type
Voltage
Refrigerant Options
Coil Options
A = None
C = Non-Fused Disconnect
0 = Electro-Mechanical Controls (standard)
0 = Not Used
Base Unit Controls
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
Not Used
A = Standard
B = LTL (includes full corrugated sleeve wrapped around unit perimeter and full corrugated top cover)
Packaging
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
0 = None
1 = Un-powered Convenience Outlet
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)
1
N = Single Circuit with Low Ambient Controller (121/151 only)
1
T = Dual Circuit (123/153 only)
U = Dual Circuit with Low Ambient Controller (123/153 only)
C = R-410A Condensing Unit
A = Air Conditioning (Cooling Only)
S= Standard Efficiency
Nominal Cooling Capacity
Service Options
Electrical Options
1
CAS121/151 models with M/N in the 8th digit meet Department of Energy (DOE) 2023 IEER requirements.
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