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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
OAU-SVX007A-EN
Digit 13 — Compressor
0
=
No Compressors
A
=
Scroll Compressors
st
B
=
Digital Scroll (1
Circuit Only)
st
C
=
Digital Scroll (1
Circuit and 2
Circuit)
D
=
Variable Speed Scroll (1
Only)
E
=
Variable Speed Scroll (1
nd
and 2
Circuit)
F
=
Scroll Compressors w/Sound
Attenuation Package
st
G
=
Digital Scroll (1
Circuit Only)
w/Sound Attenuation Package
st
H
=
Digital Scroll (1
Circuit and 2
Circuit) w/Sound Attenuation
Package
J
=
Variable Speed Scroll (1
Only) w/Sound Attenuation
Package
K
=
Variable Speed Scroll (1
nd
and 2
Circuit) w/Sound
Attenuation Package
L
=
Variable Speed Scroll (1
nd
Digital Scroll (2
Circuit)
M =
Variable Speed Scroll (1
nd
Digital Scroll (2
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
st
A
=
RCC Valve on 1
Circuit
st
B
=
RCC Valve on 1
and 2
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
Model Number Descriptions
Digit 18 — Indoor Fan Motor (hp)
ECM BELT DRIVE DIRECT DRIVE
A = 1 kW
nd
B = 2 kW
C = 3 kW
st
Circuit
D = 4 kW
st
Circuit
E =
F =
G =
H =
nd
J =
K =
L =
st
Circuit
M =
N =
st
Circuit
P =
Digit 19 — Reserved for Future Use
st
Circuit),
Digit 20 — Heat Type (PRI/SEC)
st
Circuit),
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-
nd
Circuit
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.
2 hp
3 hp
5 hp
7.5 hp
10 hp
1 hp – 1800 rpm
15 hp
1 hp – 3600 rpm
1.5 hp – 1800 rpm
1.5 hp – 3600 rpm
2 hp – 1800 rpm
2 hp – 3600 rpm
3 hp – 1800 rpm
3 hp – 3600 rpm
5 hp – 1800 rpm
5 hp – 3600 rpm
15
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