OAU-SVX007A-EN 9
Model Number Descriptions
Horizon Outdoor Air Unit
Model: OAK Rev5 and OAN
Rev5
Digit 1, 2 — Unit Type
OA = Outdoor Air
Digit 3 — Cabinet Size
K = 1,500 CFM–9,000 CFM
N = 3,750 CFM–13,500 CFM
Digit 4 — Major Design Sequence
C = Revision 4
D = Revision 5
E = Heat Pump
F = Indoor WSHP
Digit 5, 6, 7 — Normal Gross
Cooling Capacity (MBh)
000 = No Cooling
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
420 = 35 Tons High Efficiency
480 = 40 Tons High Efficiency
540 = 45 Tons High Efficiency
600 = 50 Tons High Efficiency
648 = 54 Tons High Efficiency
720 = 60 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
G = Vertical Discharge/
Split Vertical Return-Exhaust
H = Horizontal Discharge/
Split Vertical Return-Exhaust
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
and 2
nd
Circuit)
D = Variable Speed Scroll (1
st
Circuit Only)
E = Variable Speed Scroll (1
st
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
Digit 16 — Indoor Fan Motor (IFM)
0 = Direct Drive w/VFD
1 = Direct Drive (VFD by Others)
4 = Direct Drive w/Shaft Grounding
Ring w/VFD
5 = Special Motor Option
Digit 17 — Indoor Fan Wheel
A = 120
B = 120.6
C = 140
D = 140.6
E = 160
F = 160.6
G = 180
H = 180.6
J = 200
K = 200.6
L = 180 X 2
M = 180.6 X 2
Digit 18 — Indoor Fan Motor Power
(hp)
E = 1 hp –1800 rpm
F = 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
R = 7.5 hp – 1800 rpm
S = 7.5 hp – 3600 rpm
T = 10 hp – 1800 rpm
U = 10 hp – 3600 rpm
V = 15 hp – 1800 rpm
W = 15 hp – 3600 rpm
Digit 19 — Reserved for Future Use
Digit 20 — Heat Type (PRI/SEC)
0 = No Heat
A = Indirect-Fired (IF)
C = Electric – Stage
D = Electric – SCR Modulating
G = Dual Fuel (PRI-IF/SEC-ELEC)
H = Dual Fuel (PRI-ELEC/SEC-ELEC)
J = Hot Water
L = No Primary Heat, Secondary ELEC
N = Dual Fuel (PRI-ELEC-STAGED/
SEC-ELEC)
Digit 21 — Primary Fuel Type
0 = No Heat
1 = Natural Gas
2 = Propane
3 = Electric – Open Coil
5 =
Hot Water
7 = Natural Gas - 81% Eff.
8 = Propane - 81% Eff.
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