Model Number Descriptions
OAU-SVX007A-EN 15
Horizon Outdoor Air Unit
Model: OAB Rev5 and OAG
Rev5
Digit 1, 2 — Unit Type
OA = Outdoor Air
Digit 3 — Cabinet Size
B = 500 – 3000 CFM
G = 1250 – 7500 CFM
Digit 4 — Major Design Sequence
D = Revision 1
E = Heat Pump
F = Indoor WSHP
Digit 5, 6, 7 — Normal Gross
Cooling Capacity (MBh)
000 = No Cooling
036 = 3 Tons High Efficiency
048 = 4 Tons High Efficiency
060 = 5 Tons High Efficiency
072 = 6 Tons High Efficiency
084 = 7 Tons High Efficiency
096 = 8 Tons High Efficiency
108 = 9 Tons High Efficiency
120 = 10 Tons High Efficiency
144 = 12 Tons High Efficiency
180 = 15 Tons High Efficiency
210 = 17 Tons High Efficiency
240 = 20 Tons High Efficiency
264 = 22 Tons High Efficiency
300 = 25 Tons High Efficiency
360 = 30 Tons High Efficiency
Digit 8 — Minor Design Sequence
A = Vertical Discharge/Vertical Return
B = Vertical Discharge/Horizontal
Return
C = Horizontal Discharge/Vertical
Return
D = Horizontal Discharge/Horizontal
Return
E = Vertical Discharge/No Return
F = Horizontal Discharge/No Return
Digit 9 — Voltage Selection
3 = 208-230/60/3
4 = 460/60/3
5 = 575/60/3
Digit 10 — Reserved for Future Use
Digit 11 — Evaporator Type
0 = No Cooling
B = DX 4-Row
C = DX 4-Row Interlaced
D = DX 6 Row Interlaced
F = Glycol/Chilled Water Coil
Digit 12 — Hot Gas Reheat
0 = No HGRH
1 = Fin and Tube Modulating
2 = Fin and Tube On/Off
Digit 13 — Compressor
0 = No Compressors
A = Scroll Compressors
B = Digital Scroll (1
st
Circuit Only)
C = Digital Scroll (1
st
Circuit and 2
nd
Circuit)
D = Variable Speed Scroll (1
st
Circuit
Only)
E = Variable Speed Scroll (1
st
Circuit
and 2
nd
Circuit)
F = Scroll Compressors w/Sound
Attenuation Package
G = Digital Scroll (1
st
Circuit Only)
w/Sound Attenuation Package
H = Digital Scroll (1
st
Circuit and 2
nd
Circuit) w/Sound Attenuation
Package
J = Variable Speed Scroll (1
st
Circuit
Only) w/Sound Attenuation
Package
K = Variable Speed Scroll (1
st
Circuit
and 2
nd
Circuit) w/Sound
Attenuation Package
L = Variable Speed Scroll (1
st
Circuit),
Digital Scroll (2
nd
Circuit)
M = Variable Speed Scroll (1
st
Circuit),
Digital Scroll (2
nd
Circuit) w/Sound
Attenuation Package
Digit 14 — Condenser
0 = No Condenser
1 = Air Cooled Fin and Tube
2 = Air Cooled Fin and Tube w/Head
Pressure On/Off Control
3 = Water Cooled DX Condenser
Copper/Steel
4 = Air Cooled Fin and Tube w/Head
Pressure Variable Speed
8 = Water Cooled DX Condenser
Copper/Nickel
Digit 15 — Refrigerant Capacity
Control
0 = No RCC Valve
A = RCC Valve on 1
st
Circuit
B = RCC Valve on 1
st
and 2
nd
Circuit
Digit 16 — Indoor Fan Motor (IFM)
0 = ECM w/Backward Curved Plenum
Fan
1 = Direct Drive w/VFD
2 = Belt Drive
3 = Belt Drive w/VFD
4 = Special Motor Option
Digit 17 — Indoor Fan Wheel
A = 355
B = 450
C = 450 X 2
D = 12/9 T2 (Single Fan-Belt drive)
E = 12/9 BT (Dual Fan-Belt drive)
F = 315
G = 500
H = 500 X 2
J = 120.6
K = 140.6
L = 100.6
Digit 18 — Indoor Fan Motor (hp)
Digit 19 — Reserved for Future Use
Digit 20 — Heat Type (PRI/SEC)
0 = No Heat
A = Indirect Fired (IF)
B = No Primary Heat, Direct Fired (DF)
Secondary
C = Electric – Staged
D = Electric – SCR Modulating
G = Dual Fuel (PRI-IF/SEC-ELEC-
STAGED)
H = Dual Fuel (PRI-ELEC-SCR/SEC-
ELEC-STAGED)
J = Hot water (HW)
L = No Primary Heat, Secondary
ELEC-STAGED
N = Dual Fuel (PRI-ELEC-STAGED/
SEC-ELEC-STAGED)
Q = Dual Fuel (PRI-HW/SEC-ELEC-
STAGED)
T = Dual Fuel (PRI-IF/SEC-ELEC-
SCR)
U = Dual Fuel (PRI-ELEC-SCR/SEC-
ELEC-SCR)
V = No Primary Heat, Secondary
ELEC-SCR
W = Dual Fuel (PRI-ELEC-STAGED/
SEC-ELEC-SCR)
Y = Dual Fuel (PRI-HW/SEC-ELEC-
SCR)
X = Special Heat Option
Digit 21 — Primary Fuel Type
0 = No Heat
1 = Natural Gas
2 = Propane
3 = Electric – Open Coil
4 = Electric – Sheathed Coil
5 = Hot Water
7 = Nature Gas – 81% Eff.
8 = Propane – 81% Eff.
ECM BELT DRIVE DIRECT DRIVE
A = 1 kW 2 hp
B = 2 kW 3 hp
C = 3 kW 5 hp
D = 4 kW 7.5 hp
E = 10 hp 1 hp – 1800 rpm
F = 15 hp 1 hp – 3600 rpm
G = 1.5 hp – 1800 rpm
H = 1.5 hp – 3600 rpm
J = 2 hp – 1800 rpm
K = 2 hp – 3600 rpm
L = 3 hp – 1800 rpm
M = 3 hp – 3600 rpm
N = 5 hp – 1800 rpm
P = 5 hp – 3600 rpm
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