AAON SB series Owner's manual

SB Series
Vertical Self-Contained Units
Installation, Operation
& Maintenance
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinit
y
of this or an
y
other appliance.
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WARNIN
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QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
WARNIN
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3
Table of Contents
AAON SB Series Features and Options Introduction ..................................................................... 6
Safety .............................................................................................................................................. 7
SB Series Feature String Nomenclature ....................................................................................... 12
General Information ...................................................................................................................... 16
Codes and Ordinances .............................................................................................................. 16
Receiving Unit .......................................................................................................................... 17
Storage ...................................................................................................................................... 17
Direct Expansion (DX) Systems ............................................................................................... 17
Wiring Diagrams ....................................................................................................................... 18
Condensate Drain Pans ............................................................................................................. 18
Installation..................................................................................................................................... 19
Locating the Unit ...................................................................................................................... 19
Lifting and Handling the Unit ................................................................................................... 20
Unit Assembly .......................................................................................................................... 20
Refrigerant-to-Water Heat Exchanger Water Piping ................................................................ 22
Electrical ................................................................................................................................... 26
Duct Connection ....................................................................................................................... 29
Condensate Drain Piping .......................................................................................................... 29
Waterside Economizer .............................................................................................................. 30
Heating Coils ............................................................................................................................ 31
Energy Recovery Units ............................................................................................................. 31
Initial Mechanical Check and Setup ..................................................................................... 32
Routine Maintenance and Handling ...................................................................................... 33
Cleaning ................................................................................................................................ 34
Wheel Drive Components ..................................................................................................... 35
Startup Procedure .................................................................................................................. 35
Service ................................................................................................................................... 36
Startup ........................................................................................................................................... 39
Supply Fans ............................................................................................................................... 39
Fan Air Flow Adjustment ......................................................................................................... 39
Filters ........................................................................................................................................ 40
Adjusting Refrigerant Charge ................................................................................................... 40
Freeze Stat Startup .................................................................................................................... 42
Operation....................................................................................................................................... 44
Packaged DX Cooling Operation and Control ......................................................................... 44
Electric Heating Operation ....................................................................................................... 44
Steam or Hot Water Preheating Operation ............................................................................... 44
Maintenance .................................................................................................................................. 44
DX Cooling ............................................................................................................................... 45
Condensate Drain Pans ............................................................................................................. 45
E-Coated Coil Cleaning ............................................................................................................ 45
Supply Fans ............................................................................................................................... 47
Phase and Brownout Protection Module .................................................................................. 48
Filter Replacement .................................................................................................................... 50
Replacement Parts ..................................................................................................................... 50

4
AAON Longview Product Support ........................................................................................... 50
Filter Information .......................................................................................................................... 51
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 54
Index of Tables and Figures
Tables:
Table 1 - SB Series Clearances ..................................................................................................... 19
Table 2 - Glycol Freezing Points .................................................................................................. 24
Table 3 - Condenser Water Connections ...................................................................................... 25
Table 4 – Water Connection Locations ........................................................................................ 25
Table 5 - Control Wiring ............................................................................................................... 29
Table 6 - Drain Trap Dimensions ................................................................................................. 30
Table 7 - Acceptable Water-Cooled Refrigeration Circuit Values ............................................... 41
Table 8 - R-410A Refrigerant Temperature-Pressure Chart ......................................................... 43
Table 9 - 3-5 ton (B Cabinet) Pre and Unit Filters ....................................................................... 51
Table 10 - 6-10 ton (C Cabinet) Pre and Unit Filters ................................................................... 51
Table 11 - 14-18 ton (D Cabinet) Pre and Unit Filters ................................................................. 51
Table 12- 3-5 ton (B Cabinet) Mixing Box Filters ....................................................................... 52
Table 13 - 6-10 ton (C Cabinet) Mixing Box Filters .................................................................... 53
Table 14 - 14-18 ton (D Cabinet) Mixing Box Filters .................................................................. 53
Table 15 - Condenser Water Connections updated. ..................................................................... 60
Figures:
Figure 1 - Lockable Handle .......................................................................................................... 17
Figure 2 - SB Series ...................................................................................................................... 19
Figure 3 - SB Series Unit Orientation ........................................................................................... 20
Figure 4 - SB Schematic with (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, and (4)
Electric Heat (5) Compressor Section ........................................................................................... 21
Figure 5 - Connect Sections .......................................................................................................... 21
Figure 6 - Bar Clamp .................................................................................................................... 21
Figure 7 - Flange Overlap ............................................................................................................. 21
Figure 8 - Self-Tapping Screw ...................................................................................................... 21
Figure 9 - Strap Types................................................................................................................... 22
Figure 10 - Low Voltage Quick Connect ...................................................................................... 22
Figure 11- Water Connections for Water-Source Heat Pumps ..................................................... 25
Figure 12 - Electrical Connection ................................................................................................. 26
Figure 13 - Drain Trap .................................................................................................................. 30
Figure 14 - Energy Recovery Wheel ............................................................................................ 32
Figure 15 - Cross Section of Air Seal Structure ........................................................................... 32
Figure 16 - Lifting Hole Locations ............................................................................................... 33
Figure 17 - Avoid Racking of Cassette Frame .............................................................................. 35
Figure 18 - Diameter Seal Adjustment ......................................................................................... 36
Figure 19 - Hub Seal Adjustment ................................................................................................. 36

5
Figure 20 - Segment Retainer ....................................................................................................... 37
Figure 21 - Segment Installation ................................................................................................... 37
Figure 22 - Belt Replacement ....................................................................................................... 38
Figure 23 - SB Series Supply Fan ................................................................................................. 39
Figure 24- Typical wiring diagram with EC motor ...................................................................... 39
Figure 25 - Shows the jumper that is to be removed (jumped between 9 and GS). ..................... 40
Figure 26 - Potentiometer ............................................................................................................. 40
V14190 · Rev. C · 190129
(ACP 31227)

6
AAON SB Series Features and Options Introduction
Energy Efficiency
 Direct Drive Backward Curved Plenum
Supply Fans
 10-100% Variable Capacity Scroll
Compressors
 Double Wall Rigid Polyurethane Foam
Injected Panel Construction
 Airside and Waterside Economizers
 Modulating SCR Electric Heat
 Modulating Head Pressure Control
 High Efficiency Electronically
Commutated Motors
 Coaxial Refrigerant-to-Water Heat
Exchanger
 Water-Source and Geothermal Heat
Pumps
 Single Zone Variable Air Volume
 Energy Recovery Wheels
Indoor Air Quality
 Up to 100% Outside Air with Optional
Electric Pre-Heat
 Multiple High Efficiency Unit and
Mixing Box Filters
 Double Wall Construction with No
Exposed Insulation
 Stainless Steel Drain Pans
Humidity Control
 10-100% Variable Capacity Scroll
Compressors
 Modulating Hot Gas Reheat
Safety
 Freeze Stats
 Phase and Brown Out Protection
Installation and Maintenance
 Direct Drive Backward Curved Plenum
Supply Fans
 Clogged Filter Switch and Magnehelic
Gauge
 Color Coded Wiring Diagram
 Isolated Compressor and Controls
Compartment
 Compressor Isolation Valves
 Hinged Access Doors with Lockable
Handles
 Liquid Line Sight Glass
 Split Configuration for Retrofit or Space
Limited Applications
System Integration
 Customer Provided Controls
 Electric, Steam, or Hot Water Heating
 Refrigerant-to-Water Heat Exchangers
 Condensing Unit Only Options
 Split System Configurations
Environmentally Friendly
 R-410A Refrigerant
 Geothermal Heat Pump Configurations
Extended Life
 Standard 5 Year Compressor Warranty
 Double Wall Rigid Polyurethane Foam
Injected Cabinet Construction
 2,500 Hour Salt Spray Tested Interior
and Exterior Corrosion Protection
 Polymer E-Coated Coils - 5 Year Coating
Warranty
 Stainless Steel Drain Pans
 Custom Color Paint Options

7
Safety
ELECTRIC SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in dangerous
operation, serious injury, death or
property damage.
Improper servicing could result in
dangerous operation, serious injury,
death or property damage.
Before servicing, disconnect all
electrical power to the unit. More
than one disconnect may be
provided.
When servicing controls, label all
wires prior to disconnecting.
Reconnect wires correctly.
Verify proper operation after
servicing. Secure all doors with
key-lock or nut and bolt.
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Electric shock hazard. Before
servicing, disconnect all electrical
power to the unit, including remote
disconnects, to avoid shock hazard
or injury from rotating parts. Follow
proper Lockout-Tagout procedures.
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FIRE, EXPLOSION OR CARBON
MONOXIDE POISONING HAZARD
Failure to replace proper controls
could result in fire, explosion or
carbon monoxide poisoning. Failure
to follow safety warnings exactly
could result in serious injury, death or
property damage. Do not store or use
gasoline or other flammable vapors
and liquids in the vicinity of this
appliance.
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Attention should be paid to the following statements:
NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Caution statements are given to prevent actions that may result in
equipment damage, property damage, or personal injury.
WARNING - Warning statements are given to prevent actions that could result in
equipment damage, property damage, personal injury or death.
DANGER - Danger statements are given to prevent actions that will result in equipment
damage, property damage, severe personal injury or death.

8
CARBON MONOXIDE POISONING
HAZARD
Failure to follow instructions could
result in severe personal injury or
death due to carbon-monoxide
poisoning, if combustion products
infiltrate into the building.
Check that all openings in the outside
wall around the vent (and air intake)
pipe(s) are sealed to prevent
infiltration of combustion products
into the building.
Check that furnance vent (and air
intake) terminal(s) are not obstructed
in any way during all seasons.
WARNING
During installation, testing, servicing
and troubleshooting of the equipment
it may be necessary to work with live
electrical components. Only a
qualified licensed electrician or
individual properly trained in handling
live electrical components shall
perform these tasks.
Standard NFPA-70E, an OSHA
regulation requiring an Arc Flash
Boundary to be field established and
marked for identification of where
appropriate Personal Protective
Equipment (PPE) be worn, should be
followed.
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GROUNDING REQUIRED
All field installed wiring must be
completed by qualified personnel.
Field installed wiring must comply
with NEC/CEC, local and state
electrical code requirements. Failure
to follow code requirements could
result in serious injury or death.
Provide proper unit ground in
accordance with these code
requirements.
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UNIT HANDLING
To prevent injury or death lifting
equipment capacity shall exceed unit
weight by an adequate safety factor.
Always test-lift unit not more than 24
inches high to verify proper center of
gravity lift point to avoid unit damage,
injury or death.
WARNIN
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ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
open door containing fans until the
power to the unit has been
disconnected and fan wheel has
stopped rotating.
WARNIN
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9
Failure to properly drain and vent
coils when not in use during freezing
temperature may result in coil and
equipment damage.
C
A
U
TI
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N
Rotation must be checked on all
MOTORS AND COMPRESSORS of
3 phase units at startup by a qualified
service technician. Scroll
compressors are directional and can
be damaged if rotated in the wrong
direction. Compressor rotation must
be checked using suction and
discharge gauges. Fan motor rotation
should be checked for proper
operation. Alterations should only be
made at the unit power connection
C
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WATER PRESSURE
Prior to connection of condensing
water supply, verify water pressure is
less than maximum pressure shown
on unit nameplate. To prevent injury
or death due to instantaneous
release of high pressure water, relief
valves should be field supplied on
system water piping.
WARNIN
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Do not use oxygen, acetylene or air
in place of refrigerant and dry
nitrogen for leak testing. A violent
explosion may result causing injury or
death.
WARNIN
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Always use a pressure regulator,
valves and gauges to control
incoming pressures when pressure
testing a system. Excessive pressure
may cause line ruptures, equipment
damage or an explosion which may
result in injury or death.
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Do not work in a closed area where
refrigerant or nitrogen gases may be
leaking. A sufficient quantity of
vapors may be present and cause
injury or death.
WARNIN
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Do not clean DX refrigerant coils with
hot water or steam. The use of hot
water or steam on refrigerant coils
will cause high pressure inside the
coil tubing and damage to the coil.
C
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N

10
To prevent damage to the unit, do not
use acidic chemical coil cleaners. Do
not use alkaline chemical coil
cleaners with a pH value greater than
8.5, after mixing, without first using
an aluminum corrosion inhibitor in the
cleaning solution.
C
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N
Some chemical coil cleaning
compounds are caustic or toxic. Use
these substances only in accordance
with the manufacturer’s usage
instructions. Failure to follow
instructions may result in equipment
damage, injury or death.
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Door compartments containing
hazardous voltage or rotating parts
are equipped with door latches to
allow locks. Door latch are shipped
with nut and bolts requiring tooled
access. If you do not replace the
shipping hardware with a pad lock
always re-install the nut & bolt after
closing the door.
CAUTION
Cleaning the cooling tower or the
condenser water loop with harsh
chemicals, such as hydrochloric acid
(muriatic acid) or chlorine, can
damage the water-cooled condenser.
Care should be taken to avoid
allowing chemicals to enter the
water-cooled condenser. See
Appendix A - Heat Exchanger
Corrosion Resistance for more
information.
C
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OPEN LOOP APPLICATIONS
Failure of the condenser as a result
of chemical corrosion is excluded
from coverage under AAON Inc.
warranties and the heat exchanger
manufacturer’s warranties.
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WATER FREEZING
Failure of the condenser due to
freezing will allow water to enter the
refrigerant circuit and will cause
extensive damage to the refrigerant
circuit components. Any damage to
the equipment as a result of water
freezing in the condenser is excluded
from coverage under AAON
warranties and the heat exchanger
manufacturer warranties.
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11
1. Startup and service must be performed
by a Factory Trained Service
Technician.
2. The unit is for indoor use only. See
General Information section for more
unit information.
3. Every unit has a unique equipment
nameplate with electrical, operational,
and unit clearance specifications.
Always refer to the unit nameplate for
specific ratings unique to the model you
have purchased.
4. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
5. Keep this manual and all literature
safeguarded near or on the unit.
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used with R-410A and other
refrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
C
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COMPRESSOR CYCLING
2 MINUTE MINIMUM OFF TIME
To prevent motor overheating
compressors must cycle off for a
minimum of 2 minutes.
2 MINUTE MINIMUM ON TIME
To maintain the proper oil level
compressors must cycle on for a
minimum of 2 minutes.
The cycle rate must not exceed 6
starts
p
er hour.
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SB Series Feature String Nomenclature
Model Options : Unit Feature Options
GEN SIZE VLT CONFIG A1 A2 A3 A4 B1 B2 B3 1A 1B 1C 1D 2 3 4 5A 5B 5C 6A 6B 6C 7 8 9 10 11 12 13 14A 14B
SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 : 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0 0 0 0 Y - E 0
0 0 0 0 0 0 0 A B
15 16 17 18 19 20 21 22 23
12
SB Series Feature String Nomenclature
MODEL OPTIONS
Series and Generation
SB
Unit Size
003 = 3 ton Capacity
004 = 4 ton Capacity
005 = 5 ton Capacity
006 = 6 ton Capacity
007 = 7 ton Capacity
009 = 9 ton Capacity
010 =10 ton Capacity
014 =14 ton Capacity
016 = 16 ton Capacity
018 = 18 ton Capacity
Voltage
1 = 230V/1Φ/60Hz
2 = 230V/3Φ/60Hz
3 = 460V/3Φ/60Hz
4 = 575V/3Φ/60Hz
8 = 208V/3Φ/60Hz
9 = 208V/1Φ/60Hz
Configuration
0 = Right Hand Unit + Top Vertical Discharge
A = Left Hand Unit + Top Vertical Discharge
A1: Refrigerant Style
E = R-410A Variable Capacity Scroll Compressor
A2: Unit Configuration
0 = Water-Cooled Condenser - Condensing Unit
Only
7 = Water-Source/Geothermal Heat Pump + Std
Evap. Coil - Coaxial Heat Exchanger
8 = Water-Source/Geothermal Heat Pump + 6 Row
Evap. Coil - Coaxial Heat Exchanger
9 = Water-Source/Geothermal Heat Pump -
Condensing Unit Only
A3: Coil Coating
0 = Standard - None
1 = Polymer E-coated Cooling and Reheat Coils
5 = Copper Finned Coils + Stainless Steel Coil Casing
A4: Cooling / Heat Pump Staging
A = Modulating - Variable Capacity Compressor
B1: Heating Type
0 = No Heating
3 = Electric Heat
C = Steam Distributing Standard Coil
D = Steam Distributing Polymer E-Coated Coil
E = Hot Water Standard Coil
F = Hot Water Polymer E-Coated Coil
B2: Heating Designation
0 = No Heating
1 = 1 Row Coil
2 = 2 Row Coil
A = 7 kW (5.3 kW @ 208V)
B = 14 kW (10.5 kW @ 208V)
C = 21 kW (15.8 kW @ 208V)
D = 28 kW (21.0 kW @ 208V)
E = 35 kW (26.3 kW @ 208V)
F = 42 kW (31.5 kW @ 208V)
G = 49 kW (37.0 kW @ 208V)
H = 56 kW (42.0 kW @ 208V)
J = 63 kW (47.3 kW @ 208V)
K = 70 kW (52.5 kW @ 208V)
B3: Heating Staging
0 = No Heating
1 = 1 Stage
2 = 2 Stage
3 = 3 Stage
4 = 4 Stage
9 = Modulating/SCR Electric - Potentiometer Control
A = Modulating/SCR Electric - 0-10VDC Control
Signal
H = Single Serpentine 8 fpi
J = Half Serpentine 8 fpi
K = Single Serpentine 10 fpi
L = Half Serpentine 10 fpi
M = Single Serpentine 12 fpi
N = Half Serpentine 12 fpi

SB Series Feature String Nomenclature
Model Options : Unit Feature Options
GEN SIZE VLT CONFIG A1 A2 A3 A4 B1 B2 B3 1A 1B 1C 1D 2 3 4 5A 5B 5C 6A 6B 6C 7 8 9 10 11 12 13 14A 14B
SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 : 0 0 0 0 - 0 0 0 -
A
BC- 0 A 0 - 0 0 0 0 0 0 Y - E 0
0 0 0 0 0 0 0 A B
15 16 17 18 19 20 21 22 23
13
UNIT FEATURE OPTIONS
1A: Return / Outside Air Section
0 = Standard
2 = Mixing Box - Top and Front Openings
1B: Exhaust Fan
0 = Standard
A = 250 mm Exhaust Fan, 800 W EC Motor
B = 310 mm Exhaust Fan, 1.0 kW EC Motor
C = 310 mm Exhaust Fan, 1.7 kW EC Motor
D = 355 mm Exhaust Fan, 1.7 kW EC Motor
E = 450 mm Exhaust Fan, 3.0 kW EC Motor
F = 450 mm Exhaust Fan, 6.0 kW EC Motor
G = Dual 310 mm Exhaust Fan, 1.0 kW EC Motor
H = Dual 310 mm Exhaust Fan, 1.7 kW EC Motor
J = Dual 355 mm Exhaust Fan, 1.7 kW EC Motor
K = Dual 450 mm Exhaust Fan, 3.0 kW EC Motor
L = Dual 450 mm Exhaust Fan, 6.0 kW EC Motor
1C: Filter Location
0 = Standard
1D: Mixing Box Damper Control
0 = Standard - None
A = 2 Position Actuators (24V)
B = Fully Modulating Actuators (DDC)
C = Fixed Position Dampers
2: Waterside Economizer
0 = Standard - None
3: Energy Recovery Type
0 = Standard
A = Energy Recovery Wheel – Total + High CFM,
Polymer
C = Energy Recovery Wheel – Total + High CFM,
1% Purge, Polymer
E = Energy Recovery Wheel – Sensible + High CFM,
Polymer
G = Energy Recovery Wheel – Sensible + High
CFM, 1% Purge, Polymer
J = Energy Recovery Wheel - Total + High CFM,
Aluminum
L = Energy Recovery Wheel - Total + High CFM,
1% Purge, Aluminum
N = Energy Recovery Wheel - Sensible + High CFM,
Aluminum
Q = 1 % Purge High cfm Sensible ERW, Aluminum
4: Maintenance Options
0 = Standard
A = Blower Aux. Contact - Low Voltage Terminal
Block
B = Remote Start/Stop Terminals - Low Voltage
Terminal Block
C = Options A + B
5A: Supply Air Blower Configuration
0 = No Airside - Condensing Unit Only
A = 1 Blower + High Efficiency EC Motor
B = 2 Blowers + High Efficiency EC Motors
5B: Supply Air Blower
0 = No Airside - Condensing Unit Only
A = 310 mm (14”) Direct Drive Backward Curved
Plenum Fan
B = 355 mm (16”) Direct Drive Backward Curved
Plenum Fan
C = 450 mm (18”) Direct Drive Backward Curved
Plenum Fan
D = 250MM (12") Direct Drive Backward Curved
Plenum

SB Series Feature String Nomenclature
Model Options : Unit Feature Options
GEN SIZE VLT CONFIG A1 A2 A3 A4 B1 B2 B3 1A 1B 1C 1D 2 3 4 5A 5B 5C 6A 6B 6C 7 8 9 10 11 12 13 14A 14B
SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 : 0 0 0 0 - 0 0 0 - A B
C- 0
A
0 - 0 0 0 0 0 0 Y - E 0
0 0 0 0 0 0 0 A B
15 16 17 18 19 20 21 22 23
14
5C: Supply Air Blower Motor
0 = No Airside - Condensing Unit Only
B = 1.0 kW (1.34 HP)
C = 1.7 kW (2.3 hp)
D = 3.0 kW (4.0 hp)
E = 6.0 kW (8.0 hp)
F = 800 W (1.1 HP)
6A: Pre-Filter Type
0 = No Pre Filter
A = 2” Pleated - MERV 8
6B: Unit Filter Type
0 = No Unit Filter
A = 2” Pleated - MERV 8
B = 4” Pleated - MERV 8
C = 4” Pleated - MERV 11
D = 4” Pleated - MERV 13
E = 4” Pleated - MERV 14
6C: Filter Options
0 = Standard
A = Clogged Filter Switch
B = Magnehelic Gauge
C = Options A + B
7: Refrigeration Control
0 = Standard
C = Freeze Stat - Each Circuit
8: Refrigeration Options
0 = Standard
D = Modulating Hot Gas Reheat
9: Refrigeration Accessories
0 = Standard
A = Sight Glass
B = Compressor Isolation Valves
C = Options A + B
10: Power Options
0 = Standard Power Block
11: Safety Options
0 = Standard
C = Supply Air Smoke Detector
H = Remote Safety Shutoff Terminals
L = Options C + H
12: Controls
0 = Standard
A = Low Limit Controls
B = Phase and Brown Out Protection
C = Options A + B
D = Energy Recovery Wheel Rotation Detection
E = Options A+D
F = Options B+D
G = Options A+B+D
13: Special Controls
D = VAV Unit Controller - VAV Cool + CV Heat
Y = Single Zone VAV Heat Pump Unit Controller -
VAV Cool + VAV Heat
Z = Constant Volume Heat Pump Unit Controller -
CV Cool + CV Heat
1 = Make Up Air Heat Pump Unit Controller - CV
Cool + CV Heat
5 = Field Installed DDC Controls by Others with
Isolation Relays
6 = Factory Installed DDC Controls Furnished by
Others with Isolation Relays

SB Series Feature String Nomenclature
Model Options : Unit Feature Options
GEN SIZE VLT CONFIG A1 A2 A3 A4 B1 B2 B3 1A 1B 1C 1D 2 3 4 5A 5B 5C 6A 6B 6C 7 8 9 10 11 12 13 14A 14B
SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 : 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0 0 0 0 Y - E 0
0 0 0 0 0 0 0 A B
15 16 17 18 19 20 21 22 23
15
14A: Water-Cooled Condenser
B = Water Flow Switch
E = Balancing Valves + Option B
H = Motorized Shut-Off Valve + Option B
J = Two Way Head Pressure Control + Option B
M = Balancing Valves + Option J
T = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option B
W = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option E
1 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option H
2 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option J
4 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option L
5 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option M
14B: Waterside Economizer Piping
0 = Standard - None
15: Glycol Percentage
0 = Standard - None
A = Minimum 20% Propylene Glycol
B = Minimum 40% Propylene Glycol
16: Interior Cabinet Options
0 = Standard - Double Wall Construction + R-6.5
Foam Insulation + Stainless Steel Drain Pan
A = Overflow Switch
B = Compressor Sound Blanket
C = Options A + B
17: Exterior Cabinet Options
0 = Standard
A = AAON Gray Exterior Paint
B = Special Paint
C = Interior Corrosion Protection
D = Options A + C
18: Energy Recovery Cabinet
0 = Standard – None
A = Top RA + Back EA + Back OA Connections
G = OA + EA Dampers – Top RA + Back EA + Back
OA Connections
N = OA + Economizer Dampers – Top RA + Back
EA + Back Connections
U = OA + EA + Economizer Dampers – Top RA +
Back EA + Back OA Connections
19: Code Options
0 = Standard - ETL U.S.A. Listing
H = ETL U.S.A. + Canada Listing
20: Crating
0 = Standard
A = Export Crating
B = Forkliftable Base - 5” Base
D = Options A + B
E = Shipping Shrink Wrap
F = Options B + E
G = Options A + B + E
21: Unit Splits
0 = Standard - One Piece Unit
A = 1 Shipping Split (2 pallets)
B = 2 Shipping Splits (3 pallets)
C = 3 Shipping Splits (4 pallets)
D = 4 Shipping Splits (5 pallets)
H = Special Shipping Split
22: Control Vendors
0 = Standard
A = AAON Orion Controls System
H = AAON Touchscreen Controller
23: Type
B = Standard
X = Special Pricing Authorization

16
General Information
SB Series self contained units have been
designed for indoor installation only. Units
are assembled, wired, charged and run-
tested at the factory.
Certification of Steam or Hot Water Heat
Models
a. Certified as a forced air heating system
with cooling.
b. Certified for indoor installation only.
Certification of Electric Heat Models
a. Certified as an electric warm air furnace
with cooling.
b. Certified for indoor installation only.
Certification of Cooling Models
a. Certified as a commercial central air
conditioner with electrically operated
compressors.
b. Certified for indoor installation only.
c. Certified with refrigerant R-410A coils.
Codes and Ordinances
SB Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 1995/CSA C22.2 No. 236.
System should be sized in accordance with
the American Society of Heating,
Refrigeration and Air Conditioning
Engineers Handbook.
Installation of units must conform to the
ICC standards of the International
Mechanical Code, the International Building
Code, Installation of Air Conditioning and
Ventilating Systems Standard, NFPA 90A,
and local building, plumbing and waste
water codes. All appliances must be
electrically grounded in accordance with
local codes, or in the absence of local codes,
the current National Electric Code,
ANSI/NFPA 70 or the current Canadian
Electrical Code CSA C22.1.
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
WARNIN
G
These units must not be used as a
“construction heater” at anytime
during any phase of construction.
Very low return air temperatures,
harmful vapors, and misplacement of
the filters will damage the unit and its
efficiency.
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The Clean Air Act of 1990 bans the
intentional venting of refrigerant as of
July 1, 1992. Approved methods of
recovery, recycling, or reclaiming
must be followed.
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Coils and sheet metal surfaces
present sharp edges and care must
be taken when working with
equipment.
WARNIN
G

17
Receiving Unit
When received, the unit should be checked
for damage that might have occurred in
transit. If damage is found it should be noted
on the carrier’s Freight Bill. A request for
inspection by carrier’s agent should be made
in writing at once.
Nameplate should be checked to ensure the
correct model sizes and voltages have been
received to match the job requirements.
If repairs must be made to damaged goods,
then the factory should be notified before
any repair action is taken in order to protect
the warranty. Certain equipment alteration,
repair, and manipulation of equipment
without the manufacturer’s consent may
void the product warranty. Contact the
AAON Warranty Department for assistance
with handling damaged goods, repairs, and
freight claims: [phone].
Note: Upon receipt check shipment for
items that ship loose such as filters and
remote sensors. Consult order and shipment
documentation to identify potential loose-
shipped items. Loose-shipped items may
have been placed inside unit cabinet for
security. Installers and owners should secure
all doors with locks or nuts and bolts to
prevent unauthorized access.
Figure 1 - Lockable Handle
Storage
If installation will not occur immediately
following delivery, store equipment in a dry
protected area away from construction
traffic and in the proper orientation as
marked on the packaging with all internal
packaging in place. Secure all loose-shipped
items.
Direct Expansion (DX) Systems
Failure to observe the following
instructions will result in premature
failure of your system and possible
voiding of the warranty.
WARNIN
G
COMPRESSOR CYCLING
2 MINUTE MINIMUM OFF TIME
To prevent motor overheating
compressors must cycle off for a
minimum of 2 minutes.
2 MINUTE MINIMUM ON TIME
To maintain the proper oil level
compressors must cycle on for a
minimum of 2 minutes.
The cycle rate must not exceed 6
starts
p
er hou
r
.
WARNIN
G

18
All water-cooled condenser DX systems are
factory assembled, leak tested, charged with
R-410A refrigerant, and run tested.
All DX systems include evaporator coils,
liquid line filter dryers, thermal expansion
valves (TXV), and scroll compressors.
Never turn off the main power supply to the
unit, except for servicing, emergency, or
complete shutdown of the unit. When power
is cut off from the unit crankcase heaters
cannot prevent refrigerant migration into the
compressors. This means the compressor
may cool down and liquid refrigerant may
accumulate in the compressor. The
compressor is designed to pump refrigerant
gas and damage may occur when power is
restored.
If power to the unit must be off for more
than an hour, turn the thermostat system
switch to "OFF", or turn the unit off at the
control panel, and leave the unit off until the
main power switch has been turned on again
for at least 24 hours for units with
compressor crankcase heaters. This will give
the crankcase heater time to clear any liquid
accumulation out of the compressor before it
is started.
Always control the unit from the thermostat,
or control panel, never at the main power
supply, except for emergency or complete
shutdown of the unit.
During the cooling season, if the air flow is
reduced due to dirty air filters or any other
reason, the cooling coils can get too cold
which will cause excessive liquid to return
to the compressor. As the liquid
concentration builds up, oil is washed out of
the compressor, leaving it starved for
lubrication.
The compressor life will be seriously
shorted by reduced lubrication and the
pumping of excessive amounts of liquid oil
and refrigerant.
Wiring Diagrams
Unit specific wiring diagrams are laminated
and affixed inside the controls compartment
door.
Condensate Drain Pans
Units require drain p-traps and lines to be
connected to the condensate drain pans of
the unit. The lines should be the same pipe
size or larger than the drain connection,
include a p-trap, and pitch downward toward
drain. An air break should be used with long
runs of condensate lines.
Waterside economizer coil units include a
separate condensate drain pan which drains
into the evaporator coil drain pan.
CRANKCASE HEATER
Some units are equipped with
compressor crankcase heaters,
which should be energized at least
24 hours prior to condenser
operation, to clear any liquid
refrigerant from the compressors.
CAUTION
Unit should not be operated without a
p-trap. Failure to install a p-trap may
result in overflow of condensate
water.
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Installation
AAON equipment has been designed for
quick and easy installation.
Locating the Unit
Placement of the unit relative to ductwork,
electrical and plumbing must be carefully
considered. Return air plenum or duct can be
mounted directly to the return air flanges.
Use flexible gasket material to seal the duct
to the unit.
Verify floor or foundation can support the
total unit weight, including accessory
weights. Unit must be level in both
horizontal axes to support the unit and
reduce noise and vibration from the unit.
Allow adequate service clearances as shown
on the unit nameplate and unit drawing.
Consult your local building codes for
additional service clearance requirements.
Allow adequate space for piping access and
panel removal. Condenser water piping and
condensate drain connections are located on
either side of the unit.
Figure 2 - SB Series
Table 1 - SB Series Clearances
Location Minimum
Clearance Required
Access Door Sides 36 inches
All Other Sides 6 inches
Floor Mounted Units
Make sure the unit is level and mounted on a
field supplied platform with a minimum
height to allow for proper depth of the
condensate line p-trap. Other installation
provisions may be necessary according to
job specifications. SB Series vertical air
handling units are designed for up flow
applications only.
Emergency drain pan is
recommended for all applications
where a risk of water damage to
surrounding structure or furnishings.
Refer to local codes.
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20
Figure 3 - SB Series Unit Orientation
Lifting and Handling the Unit
Before lifting unit, be sure that all shipping
material has been removed from unit.
Care should be taken if using spreader bars,
blocking or other lifting devices to prevent
damage to the cabinet, coil or fans.
Unit Assembly
Although SB Series units are shipped
factory assembled as standard, the unit may
be ordered as shipping splits for certain
applications such as for assembly in existing
structures where modules must be
manipulated separately. If the unit was
ordered as shipping splits, then they must be
assembled in the field.
Locate the schematic in the equipment’s
literature packet.
1. Identify and Situate Splits
a. SB Units can have the following
ship split sections:
1. Exhaust Fan
2. Energy Recovery
3. Air Handler
4. Electric Heat
5. Pre filter
6. Mixing box
7. Water-Cooled Condenser
UNIT HANDLING
Incorrect lifting can cause damage to
the unit, injury or death. Lifting
equipment capacity should exceed
unit weight by an adequate safety
factor. Always test lift unit not more
than 24 inches high to verify proper
center of gravity lift point.
WARNIN
G
Connections and service
access on right side for
right hand orientation
Right Hand Side
Left Hand Side
Compressor and Heat
Exchanger Compartment
SB Series Top View
Air Flow Consider the air flow to be
hitting the back of your head.
Supply Air