Fig. A — Model Number Nomenclature
Unit/Series/Model
50GCQ = Packaged Rooftop Heat Pump
17 SEER and 16 SEER2 High Efficiency
Cooling Tons
04 = 3 tons
05 = 4 tons
06 = 5 tons
Sensor Options
A = None
B = Return Air (RA) Smoke Detector
C = Supply Air (SA) Smoke Detector
D = RA + SA Smoke Detector
E = CO
2
Sensor
F = RA Smoke Detector and CO
2
Sensor
G = SA Smoke Detector and CO
2
Sensor
H = RA + SA Smoke Detector and CO
2
Sensor
J = Condensate Overflow Switch (electromechanical controls only)
K = Condensate Overflow Switch and RA Smoke Detector
L = Condensate Overflow Switch and RA and SA Smoke Detectors
M = Condensate Overflow Switch and SA Smoke Detector
Indoor Fan Options
1 = Direct Drive — EcoBlue — Standard Static
2 = Direct Drive — EcoBlue — Medium Static
3 = Direct Drive — EcoBlue — High Static
Refrig. Systems Options
J = Two-Stage Cooling
1
T = Two-Stage Cooling (1 phase only)
1
Coil Options – (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
Design Revision
- = Factory Design Revision
Base Unit Controls
0 = Base Controls, set up for field-installed air mgmt devices
2 = RTU Open Multi-Protocol Controller
3 = SystemVu
TM
Controls
6 = Electro-mechanical Controls — can be used with W7220
EconoMi$er X (with Fault Detection and Diagnostic)
Intake / Exhaust Options
A = None
B = Temperature Economizer with Barometric Relief
F = Enthalpy Economizer with Barometric Relief
K = Two-Position Damper
U = Temperature Ultra Low Leak Economizer
with Barometric Relief
W = Enthalpy Ultra Low Leak Economizer
with Barometric Relief
Service Options
0 = None
1 = Unpowered Convenience Outlet (CO)
2 = Powered Convenience Outlet
3 = Hinged Access Panels
4 = Hinged Access Panels and Unpowered CO
5 = Hinged Access Panels and Powered CO
6 = MERV-8 High Efficiency Filters
7 = Unpowered CO and MERV-8 High Efficiency
(HE) Filters
8 = Powered CO and MERV-8 HE Filters
9 = Hinged Access Panels and MERV-8 HE Filters
A = Hinged Access Panels, Unpowered CO, and
MERV-8 HE Filters
B = Hinged Access Panels, Powered CO, and
MERV-8 HE Filters
C = Foil-Faced Insulation
Packaging and Seismic Compliance
0 = Standard
1 = LTL
Electrical Options
A = None
C = Non-Fused Disconnect (NFD)
D = Thru-The-Base (TTB) Connections
F = Non-Fused Disconnect and TTB Connections
N = Phase Monitor Protection
Q = Phase Monitor Protection and NFD
R =
Phase Monitor Protection and TTB Connections
T = Phase Monitor Protection and NFD and
TTB Connections
Example:
Position:
50GCQJ 04A2A5-0A0A0
123456789
10
11 12 13 14 15 16 17 18
Voltage
1 = 575-3-60
3 = 208/230-1-60
2
5 = 208/230-3-60
6 = 460-3-60
1
Units meet Department of Energy 2023 SEER2 requirements.
2
The following are not available as a factory-installed options for models
with this voltage code: Coated Coils or Cu Fin Coils, Louvered Hail
Guards, Economizer or Two-Position Damper, Powered 115 Volt
Convenience Outlet.
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