Fig. B — Model Number Nomenclature (Horizontal Units)
Model Series - WeatherMaker
®
TC - Standard Efficiency
Unit Heat Type
48 - Gas Heat Packaged Rooftop
Cooling Tons (Horizontal Air Flow)
18 = 15 tons 
21 = 17.5 tons
25 = 20 tons
29 = 25 tons
Heat Options
D  =  Low Gas Heat
E  =  Medium Gas Heat
F  =  High Gas Heat
S  =  Low Heat w/ Stainless Steel Exchanger
R  =  Medium Heat w/ Stainless Steel Exchanger
T  =  High Heat w/ Stainless Steel Exchanger     
Sensor Options
A =  None
B =  RA Smoke Detector
C =  SA Smoke Detector
D =  RA + SA Smoke Detector
E =  CO
2
F  =  RA Smoke Detector and CO
2
G =  SA Smoke Detector and CO
2
H =  RA + SA Smoke Detector and CO
2
J  =  Condensate Overflow Switch
K =  Condensate Overflow Switch and RA Smoke Detectors
L  =  Condensate Overflow Switch and RA and SA Smoke Detectors 
Indoor Fan Options & Air Flow Configuration
5  =  Standard Static/Horizontal Supply, Return Air Flow 
    (except 29 size models)
6  =  Medium Static/Horizontal Supply, Return Air Flow 
    (Standard on 29 size models)
7  =  High Static/Horizontal Supply, Return Air Flow
F  =  Medium Static, High Efficiency Motor/Horizontal Supply, Return Air Flow
G =  High Static, High Efficiency Motor/Horizontal Supply, Return Air Flow
Refrig. Systems Options
D =  Two stage cooling model with Round Tube/Plate Fin
 Coils
E =  Two stage cooling models with Humidi-MiZer
®
 System
Coil Options – RTPF (Outdoor – Indoor – Hail Guard)
A =  Al/Cu – Al/Cu
B =  Precoat Al/Cu – Al/Cu
C =  E-coat Al/Cu – Al/Cu
D =  E-coat Al/Cu – E-coat Al/Cu
E =  Cu/Cu – Al/Cu
F  =  Cu/Cu – Cu/Cu
M =  Al/Cu – Al/Cu – Louvered Hail Guard
N =  Precoat Al/Cu – Al/Cu – Louvered Hail Guard
P =  E-coat Al/Cu – Al/Cu – Louvered Hail Guard
Q =  E-coat Al/Cu – E-coat Al/Cu – Louvered Hail Guard
R =  Cu/Cu – Al/Cu – Louvered Hail Guard
S =  Cu/Cu – Cu/Cu – Louvered Hail Guard
Voltage
1 = 575/3/60
5 = 208-230/3/60
6 = 460/3/60
Design Revision
-  =  Factory Design Revision 
Base Unit Controls
0  =  Electro-mechanical Controls. Can be used with W7212 
    EconoMi$er IV (Non-Fault Detection and Diagnostic)
1 = PremierLink™ Controller
2  =  RTU Open Multi-Protocol Controller
6  =  Electro-mechanical w/ 2-Speed Fan and W7220 
    Economizer Controller. Can be used with W7220
    EconoMi$er X (with Fault Detection and Diagnostic)
Intake / Exhaust Options
A =  None
B =  Temperature Economizer w/ Barometric Relief
F  =  Enthalpy Economizer w/ Barometric Relief
K =  2-Position Damper
U = 
Temp Ultra Low Leak Economizer w/ Barometric Relief
W = 
Enthalpy Ultra Low Leak Economizer w/ Barometric Relief
Service Options
0 = None
1  =  Unpowered Convenience Outlet
2  =  Powered Convenience Outlet
3 = Hinged Panels
4  =  Hinged Panels + Unpowered Convenience Outlet
5  =  Hinged Panels + Powered Convenience Outlet 
Packaging
0 = Standard
Electrical Options 
A =  Non-USA models - No (SAV) included
C =  Non-Fused Disconnect
G =  Standard USA models - (SAV) included
J  =  2 Speed Fan Controller (VFD) and
  Non-Fused Disconnect
Example:
Position:
48TCDD25A5A5-0A0A 0
123456789
10
11 12 13 14 15 16
17 18
NOTE:
Not all possible options are displayed. See the current 
48TC Horizontal 15 to 25 Ton Price Pages for more details.