AAON V3-A Guide

V3 Series
Vertical Indoor Air Handling 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
vicinity of this or any other appliance.
WARNING
WARNING
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.
WARNING

2
Table of Contents
Safety .............................................................................................................................................. 6
V3 Base Model Description.......................................................................................................... 11
General Information...................................................................................................................... 17
Codes and Ordinances............................................................................................................... 18
Receiving Unit........................................................................................................................... 18
Storage....................................................................................................................................... 19
Direct Expansion (DX) Systems ............................................................................................... 19
Gas or Electric Heating ............................................................................................................. 20
Wiring Diagrams....................................................................................................................... 20
Condensate Drain Pans.............................................................................................................. 20
Installation..................................................................................................................................... 21
Locating the Unit....................................................................................................................... 21
Lifting and Handling the Unit................................................................................................... 24
Unit Assembly........................................................................................................................... 24
Control Box............................................................................................................................... 26
Duct Connection........................................................................................................................ 26
Condensate Drain Piping........................................................................................................... 26
Heating Coils............................................................................................................................. 27
Chilled Water Coil .................................................................................................................... 28
Evaporator Coil ......................................................................................................................... 29
Thermal Expansion Valve......................................................................................................... 29
Hot Gas Reheat.......................................................................................................................... 29
Hot Gas Bypass......................................................................................................................... 29
Purge Circuit ............................................................................................................................. 30
Energy Recovery Units ............................................................................................................. 30
Initial Mechanical Check and Setup...................................................................................... 31
Routine Maintenance and Handling...................................................................................... 32
Cleaning................................................................................................................................. 32
Wheel Drive Components ...................................................................................................... 33
Startup Procedure.................................................................................................................. 34
Service.................................................................................................................................... 35
Electrical.................................................................................................................................... 37
Gas Heating............................................................................................................................... 40
Unit Location and Clearances............................................................................................... 40
Condensate Drain Piping...................................................................................................... 41
Condensate Neutralization .................................................................................................... 41
General Venting..................................................................................................................... 42
Open Combustion Venting..................................................................................................... 43
Separated Combustion Venting ............................................................................................. 44
Gas Supply, Piping and Connections .................................................................................... 45
Piping Sizing Examples ......................................................................................................... 47
Inlet and Manifold Pressures................................................................................................. 47
Gas Pressure Regulator & Overpressure Protection Device................................................ 47
Piping Supports ..................................................................................................................... 47

3
Additional Gas Piping Considerations.................................................................................. 48
Leak Testing........................................................................................................................... 48
Startup........................................................................................................................................... 50
Filters......................................................................................................................................... 50
Supply Fans............................................................................................................................... 50
Fan Air Flow Adjustment.......................................................................................................... 50
Adjusting Refrigerant Charge ................................................................................................... 51
Gas Heater................................................................................................................................. 55
Operation....................................................................................................................................... 58
Thermostat Operation................................................................................................................ 58
Split System DX Cooling Operation and Control..................................................................... 58
Chilled Water or Non-Compressorized DX Cooling Operation............................................... 58
Steam or Hot Water Preheating Operation................................................................................ 58
Electric Heating Operation........................................................................................................ 58
Gas Heater Operation................................................................................................................ 58
Gas Heater Operating and Safety Instructions ..................................................................... 59
Shutdown................................................................................................................................ 59
Maintenance.................................................................................................................................. 63
DX Cooling ............................................................................................................................... 63
Condensate Drain Pans.............................................................................................................. 63
Gas Heating............................................................................................................................... 64
Furnace Maintenance............................................................................................................ 65
E-Coated Coil Cleaning ............................................................................................................ 67
Winterizing Coils ...................................................................................................................... 69
Supply Fans............................................................................................................................... 69
Phase and Brownout Protection Module................................................................................... 70
Filter Replacement .................................................................................................................... 72
Replacement Parts..................................................................................................................... 72
AAON Technical Support......................................................................................................... 72
Filter Information.......................................................................................................................... 73
Refrigerant Piping Diagrams ........................................................................................................ 76
V3 Series Startup Form................................................................................................................. 77
Maintenance Log .......................................................................................................................... 82
Literature Change History............................................................................................................. 83

4
Index of Tables and Figures
Tables:
Table 1 - Electric and Gas Heating Capacities ............................................................................. 21
Table 2 - V3 Series Clearances..................................................................................................... 22
Table 3 - Drain Trap Dimensions ................................................................................................. 27
Table 4 - Steam Distributing Coil Sweat Connection Sizes......................................................... 27
Table 5 - Hot Water Coil Sweat Connection Sizes....................................................................... 27
Table 6 - Chilled Water Coil Sweat Connection Sizes................................................................. 28
Table 7 - Control Wiring............................................................................................................... 40
Table 8 - Open Combustion Venting............................................................................................ 43
Table 9 - Equivalent DWV Fittings Length.................................................................................. 44
Table 10 - Natural Gas (ft3/hr) Maximum Piping Capacities ....................................................... 46
Table 11 - Propane (kBtu/hr) Maximum Piping Capacities ......................................................... 46
Table 12 - Gas Inlet Pressure........................................................................................................ 46
Table 13 - Manifold Pressure........................................................................................................ 46
Table 14 - Gas Piping Supports.................................................................................................... 47
Table 15 - Acceptable Refrigeration Circuit Values..................................................................... 52
Table 16 - R-410A Refrigerant Temperature-Pressure Chart....................................................... 54
Table 17 - Gas Heat Ignition Times.............................................................................................. 59
Table 18 - Ignition Control Sequence of Operation...................................................................... 60
Table 19 - Gas Heater LED Diagnostics....................................................................................... 62
Table 20 - Gas Heater Troubleshooting Guide............................................................................. 63
Table 21 - V3 Series E Cabinet Pre-Filters................................................................................... 73
Table 22 - V3 Series A Cabinet Unit Filters................................................................................. 74
Table 23 - V3 Series B Cabinet Unit Filters................................................................................. 74
Table 24 - V3 Series C Cabinet Unit Filters................................................................................. 75
Table 25 - V3 Series D Cabinet Unit Filters................................................................................. 75
Table 26 - V3 Series Energy Recovery OA Filters (Feature 13 = A-V)....................................... 75
Figures:
Figure 1 - Lockable Handle .......................................................................................................... 19
Figure 2 - High Efficiency Gas Heater......................................................................................... 21
Figure 3 - Minimum Clearance Required for Access to Unit (V3 Series plan view)................... 22
Figure 4 - V3 internal control panel with rear removable access panel shown............................ 23
Figure 5 - V3 Series Unit Orientation........................................................................................... 23
Figure 6 - V3 Schematic with (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, and (4)
Electric Heat.................................................................................................................................. 24
Figure 7 - Low & High Voltage Quick Connect........................................................................... 24
Figure 8 - Connect Sections.......................................................................................................... 25
Figure 9 - Bar Clamp .................................................................................................................... 25
Figure 10 - Flange Overlap........................................................................................................... 25
Figure 11 - Self-Tapping Screw.................................................................................................... 25
Figure 12 - Back View External Control Box .............................................................................. 26
Figure 13 - Drain Trap.................................................................................................................. 26
Figure 14 - Steam Distributing Piping.......................................................................................... 27

5
Figure 15 - Hot & Chilled Water Piping....................................................................................... 28
Figure 16 - TXV Bulb Position..................................................................................................... 29
Figure 17 - Hot Gas Purge Circuit................................................................................................ 30
Figure 18 - Energy Recovery Wheel ............................................................................................ 30
Figure 19 - Cross Section of Air Seal Structure ........................................................................... 31
Figure 20 - Lifting Hole Locations............................................................................................... 32
Figure 21 - Avoid Racking of Cassette Frame.............................................................................. 34
Figure 22 - Diameter Seal Adjustment ......................................................................................... 34
Figure 23 - Hub Seal Adjustment ................................................................................................. 35
Figure 24 - Segment Retainer....................................................................................................... 35
Figure 25 - Segment Installation................................................................................................... 35
Figure 26 - Belt Replacement....................................................................................................... 37
Figure 27 - External control box electrical connections............................................................... 38
Figure 28 - V3 internal control panel electrical connections........................................................ 38
Figure 29 - Gas Heat Condensate Trap......................................................................................... 41
Figure 30 - Condensate Neutralizer Kit........................................................................................ 42
Figure 31 - Open Combustion Venting......................................................................................... 44
Figure 32 - Separated Combustion Venting.................................................................................. 45
Figure 33 - Sediment Trap for Gas Heat....................................................................................... 48
Figure 34 - Typical wiring diagram with EC motor..................................................................... 50
Figure 35 - Shows the jumper that is to be removed (jumped between 9 and GS). ..................... 51
Figure 36 - Potentiometer ............................................................................................................. 51
Figure 37 - Gas Heater Instructions.............................................................................................. 55
Figure 38 - Gas Control Switch.................................................................................................... 56
Figure 39 - Natural Gas Flame...................................................................................................... 57
Figure 40 - Propane Gas Flame .................................................................................................... 57
Figure 41 - Flame Sensor Current Check ..................................................................................... 60
Figure 42 - Ignition Control Module ............................................................................................ 61
Figure 43 - Safety Switches.......................................................................................................... 61
Figure 44 - Rollout Switch............................................................................................................ 61
Figure 45 - High Limit Switch in Air Stream............................................................................... 62
Figure 46 - High Limit Switch on Fan Housing........................................................................... 62
G014420 · Rev. A · 180813
(ACP J01398)

6
Safety
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Shut off main gas supply.

Do not touch any electrical switch.

Do not use any phone in the
building.
Leave the building immediately.

Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.

If you cannot reach your gas
supplier, call the fire department.
CAUTION
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.
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.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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.
WARNING
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.
WARNING

7
Unit power supply wire should be
only copper or aluminum.
CAUTION
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.
WARNING
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.
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.
WARNING
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.
WARNING
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 furnace vent (and air
intake) terminal(s) are not obstructed
in any way during all seasons.
WARNING

8
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.
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.
WARNING
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.
WARNING
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.
WARNING
CAUTION
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.
WARNING
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.
WARNING
Failure to properly drain and vent coils
when not in use during freezing
temperature may result in coil and
equipment damage.
CAUTION
Rotation must be checked on all
MOTORS of 3 phase units at startup
by a qualified service technician. Fan
motor rotation should be checked for
proper operation. Alterations should
only be made at the unit power
connection.
CAUTION

9
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.
CAUTION
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.
WARNING
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
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.
CAUTION
Do not weld or cut foam panel with
plasma cutters or a cutting torch –
When burnt the foam produces
dangerous fumes.
WARNING
Never attempt to open an access door
or remove a panel while the unit is
running. Pressure in the unit can
cause excessive force against the
panel.
WARNING
Ensure that sufficient dampers will be
open to provide air path before fan is
allowed to run.
WARNING

10
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. Use only with type of the gas approved
for the furnace. Refer to the furnace rating
plate.
4. Install this furnace only in a location and
position as specified in the Installation
section of this manual.
5. Provide adequate combustion ventilation
air to the furnace. If a vent duct extension
is used, a class IV approved vent is
required. See the General Venting section
of this manual.
6. Combustion products must be discharged
to the outdoors. Connect the furnace to
an approved vent system. See the
General Venting section of this manual.
7. Condensate is produced in the furnace
and requires a condensate drain system.
See the Condensate Drain Piping section
of this manual.
8. Never test for gas leaks with an open
flame. Use a commercially available
soap solution made specifically for the
detection of leaks to check all
connections.
9. Always install and operate furnace within
the intended airflow range, temperature
rise range, and duct system external static
pressure (ESP) as specified on the unit
nameplate.
10. The supply and return air ducts must be
derived from the same space. It is
recommended ducts be provided with
access panels to allow inspection for duct
tightness. When a down flow duct is used
with electric heat, the exhaust duct should
be an L shaped duct.
11. These units must not be used for heating
or cooling at any time during any phase
of construction. Very low return air
temperatures, harmful vapors, and
misplacement of the filters will damage
the unit and its efficiency.
12. Clean furnace, duct and components
upon completion of the construction
setup. Verify furnace operating
conditions including input rate,
temperature rise and ESP.
13. 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.
14. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
15. Keep this manual and all literature
safeguarded near or on the unit.

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
E
E
A
:
A
B
C
H
-
0
E
A
-
F
F
B
-
0
C
0
-
A
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
11
V3 Base Model Description
BASE MODEL
SERIES AND GENERATION
V3 = Horizontal - Back Intake, Front Discharge
UNIT SIZE
A = Up to 1,200 cfm
B = Up to 2,000 cfm
C = Up to 4,000 cfm
D = Up to 6,000 cfm
E = Up to 10,000 cfm
UNIT ORIENTATION
R = Right Hand Connections
L = Left Hand Connections
REVISION
B = Second Revision
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
CORROSION PROTECTION
0 = None
A = Interior Corrosion Protection
Model Option A: COOLING
A1: COOLING TYPE
0 = No Cooling
1 = R-410A DX Cooling
2 = Chilled Water Cooling
A2: COOILNG ROWS
0 = No Cooling
4 = 4 Row Coil
6 = 6 Row Coil
8 = 8 Row Coil
A3: COOLING STAGES
0 = No Cooling
1 = Single Circuit
2 = Two Circuits - Interlaced Coil
D = Double Serpentine
F = Single Serpentine
H = Half Serpentine
Q = Quarter Serpentine
A4: COOLING FPI
0 = No Cooling
A = 10 fpi
B = 8 fpi
C = 12 fpi
D = 14 fpi

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
E
E
A
:
A
B
C
H
-
0
E
A
-
F
F
B
-
0
C
0
-
A
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
12
Model Option B: HEATING
B1: HEATING TYPE
0 = No Heating
1 = Hot Water
3 = Electric Heating
4 = Steam Distributing
A = Open Combustion Natural Gas Heat
B = Separated Combustion Natural Gas Heat
C = Open Combustion LP Gas Heat
D = Separated Combustion LP Gas Heat
E = Open Combustion Natural Gas Heat - High
Altitude
F = Separated Combustion Natural Gas Heat - High
Altitude
G = Open Combustion LP Gas Heat - High Altitude
H = Separated Combustion LP Gas Heat - High
Altitude
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) OR 45MBH input
D = 28 kW (21.0 kW @ 208V) OR 60MBH input
E = 35 kW (26.3 kW @ 208V) OR 72MBH input
F = 42 kW (31.5 kW @ 208V) OR 80MBH input
G = 49 kW (37.0 kW @ 208V)
H = 56 kW (42.0 kW @ 208V) OR 108MBH input
J = 63 kW (47.3 kW @ 208V) OR 120MBH input
K = 70 kW (52.5 kW @ 208V)
L = 77 kW (57.8 kW @ 208V) OR 160MBH input
M = 84 kW (63.0 kW @ 208V)
B3: HEATING STAGES
0 = No Heating
1 = 1 Stage
2 = 2 Stage
3 = 3 Stage
4 = 4 Stage
A = Modulating 3:1 96% Efficient Counter-Flow
D = 2 Stage 96% Efficient Counter-Flow
G = 4 Stage 96% Efficient Counter-Flow
S = Modulating/SCR Electric
B3: HEATING STAGES Continued
F = Single Serpentine 12 fpi
H = Half Serpentine 12 fpi
Q = Quarter Serpentine 12 fpi
K = Single Serpentine 8 fpi
L = Half Serpentine 8 fpi
M = Quarter Serpentine 8 fpi
N = Single Serpentine 10 fpi
P = Half Serpentine 10 fpi
R = Quarter Serpentine 10 fpi
Feature 1: SUPPLY FAN
1A: SUPPLY AIR BLOWER CONFIGURATION
A = 1 Blower + 1 High Efficiency EC Motor
B = 2 Blowers + 2 High Efficiency EC Motors
1B: SUPPLY AIR BLOWER
A = 310 mm Direct Drive BC Plenum Fan
B = 355 mm Direct Drive BC Plenum Fan
C = 450 mm Direct Drive BC Plenum Fan
D = 250 mm Direct Drive BC Plenum Fan
1C: SUPPLY AIR BLOWER MOTOR
A = 500 W (0.67 hp)
B = 1.0 kW (1.34 hp)
C = 1.7 kW (2.28 hp)
D = 3.0 kW (4.02 hp)
E = 6.0 kW (8.00 hp)
F = 800 W (1.07 hp)
1D: SUPPLY BLOWER CONTROL/CONTROL
VENDORS
C = Field Installed Controls by Others
D= Field Installed Controls by Others + Isolation
Relays
E = VCC-X WattMaster Orion Controls System
H = AAON Touchscreen Controller

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
E
E
A
:
A
B
C
H
-
0
E
A
-
F
F
B
-
0
C
0
-
A
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
13
Feature 2: REFRIGERATION OPTIONS
0 = Standard - None
A = Single Circuit External Hot Gas Bypass
B = Dual Circuit External Hot Gas Bypass
C = Heat Pump
D = Option B + H
F = Options C + H
H = Modulating Hot Gas Reheat
P = Option H (Circuit 1) + Option A (Circuit 2)
R = Option C + A
S = Option C + B
T = Option C + H + A
U = Option C + H + B
Feature 3: SPECIAL CONTROLS
0 = Standard - None
A = Constant Volume Controller - CV Cool + CV
Heat
C = VAV Controller - VAV Cool + CV Heat
E = Make Up Air Controller - CV Cool + CV Heat
Feature 4: ADDITIONAL CONTROLS
0 = Standard - None
A = Phase and Brownout Protection
B = Return and Supply Air Firestat
C = Return Air Smoke Detector
D = Options A + B
E = Options A + C
F = Options B + C
G = Options A + B + C
H = Remote Safety Shutdown Terminals
J = Energy Recovery Wheel Rotation Detection
K = Options A + H
L = Options A + J
M = Options B + H
N = Options B + J
P = Options C + H
Q = Options C + J
R = Options H + J
S = Options A + B + H
T = Options A + B + J
U = Options A + C + H
V = Options A + C + J
Feature 4: ADDITIONAL CONTROLS
Continued
W = Options A + H + J
Y = Options B + C + H
Z = Options B + C + J
1 = Options B + H + J
2 = Options C + H + J
3 = Options A + B + C + H
4 = Options A + B + C + J
5 = Options A + B + H + J
6 = Options A + C + H + J
7 = Options B + C + H + J
8 = Options A + B + C + H + J
Feature 5: MIXING BOX
5A: RETURN AIR DAMPER POSITION
0 = Standard - None
F = Front
L = Left Hand (Front OA Damper Required)
R = Right Hand (Front OA Damper Required)
T = Top (Front OA Damper Required)
5B: OUTSIDE AIR DAMPER POSITION
0 = Standard - None
F = Front
L = Left Hand (Front RA Damper Required)
R = Right Hand (Front RA Damper Required)
T = Top (Front RA Damper Required)
5C: MIXING BOX DAMPER CONTROL
0 = Standard - None
A = 2 Position Actuators (24V)
B = Fully Modulating Actuators (DDC)
C = Fixed Position Dampers

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
1
1
H
:
A
A
B
H
-
0
A
A
-
F
F
B
-
0
A
0
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
14
Feature 6: FILTER BOX
6A: PRE FILTER BOX
0 = Standard - None
A = 2” Pleated - 30% Eff. - MERV 10
B = 4” Pleated - 30% Eff. - MERV 10
C = 4” Pleated - 65% Eff. - MERV 11
D = 4” Pleated - 85% Eff. - MERV 13
E = 4” Pleated - 95% Eff. - MERV 14
F = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
30% Eff. - MERV 10
G = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
65% Eff. - MERV 11
H = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
85% Eff. - MERV 13
J = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
95% Eff. - MERV 14
6B: UNIT FILTER
0 = Standard - None
A = 2” Pleated - 30% Eff. - MERV 10
B = 4” Pleated - 30% Eff. - MERV 10
C = 4” Pleated - 65% Eff. - MERV 11
D = 4” Pleated - 85% Eff. - MERV 13
E = 4” Pleated - 95% Eff. - MERV 14
F = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
30% Eff. - MERV 10
G = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
65% Eff. - MERV 11
H = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
85% Eff. - MERV 13
J = 2” Pleated - 30% Eff. - MERV 10 + 4” Pleated -
95% Eff. - MERV 14
6C: FINAL FILTER BOX
0 = Standard - None
Feature 7: FILTER OPTIONS
0 = Standard - None
A = Magnehelic Gauge
B = Clogged Filter Switch
C = Options A + B
D = Magnehelic Gauge –Unit Filter + ERW Filter
F = Clogged Filter Switch –Unit Filter + ERW Filter
G = Options D + F
Feature 8: COIL COATING
0 = Standard - None
A = E-coated Cooling and Heating Coils
B = Copper Finned Coils + Stainless Steel Coil
Casing
Feature 9: EXPANSION VALVE
0 = None
A = Thermal Expansion Valves
Feature 10: EXPANSION VALVE
CONTROLS
0 = None
A = Standard Control
Feature 11: EXTERNAL PAINT
0 = Standard - None
A = AAON Gray Paint
B = Special Paint

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
E
E
A
:
A
B
C
H
-
0
E
A
-
F
F
B
-
0
C
0
-
A
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
15
Feature 12: TONNAGE
0 = Standard - None
A = 2 ton Capacity
B = 3 ton Capacity
C = 4 ton Capacity
D = 5 ton Capacity
E = 6 ton Capacity
F = 7 ton Capacity
G = 8 ton Capacity
U = 9 ton Capacity
H = 10 ton Capacity
V = 11 ton Capacity
W = 13 ton Capacity
J = 14 ton Capacity
Y = 15 ton Capacity
Z = 16 ton Capacity
K = 17 ton Capacity
1 = 18 ton Capacity
2 = 20 ton Capacity
L = 22 ton Capacity
M = 25 ton Capacity
3 = 26 ton Capacity
N = 30 ton Capacity
P = 31 ton Capacity
Q = 34 ton Capacity
R = 40-45 ton Capacity
S = 50-55 ton Capacity
4 = 60 ton Capacity
T = 63 ton Capacity
5 = 70 ton Capacity
Feature 13: ENERGY RECOVERY
TYPE
0 = Standard –None
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
13: ENERGY RECOVERY TYPE Continued
L = Energy Recovery Wheel –Total + High CFM,
1% Purge, Aluminum
N = Energy Recovery Wheel –Sensible + High
CFM, Aluminum
Q = Energy Recovery Wheel –Sensible + High
CFM, 1% Purge, Aluminum
Feature 14: GPM
14A: GPM COOLING COIL
0 = Standard - None
14B: GPM HEATING COIL
0 = Standard - None
Feature 15: CONTROL PANEL
0 = Internal Control Panel
A = Small Control Panel - 12” x 12”
B = Medium Control Panel - 25” x 22”
C = Large Control Panel - 48” x 22”
Feature 16: SHIPPING SPLITS
0 = Standard –None
A = 1 Shipping Split (2 pallets)
B = 2 Shipping Splits (3 pallets)
C = 3 Shipping Splits (4 pallets)
D = 4 Shipping Splits (5 pallets)
E = 5 Shipping Splits (6 pallets)
H = Special Shipping Split (SPA Required)

V3 Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
SIZE
ORENT
MJREV
VLT
CORR
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
V3
-
B
R
B
-
2
-
0
-
2
6
H
A
-
E
E
A
:
A
B
C
H
-
0
E
A
-
F
F
B
-
0
C
0
-
A
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
15
16
17
18
19
20
21
22
23
16
Feature 17: 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
Feature 18: BLANK
0 = Standard - None
Feature 19: EXHAUST FAN
0 = Standard - None
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
Feature 20: CRATING
0 = Standard - None
A = Export Crating
B = Forkliftable Base - 5” Base
C = Options A + E
D = Options A + B
E = Shipping Shrink Wrap
F = Options B + E
G = Options A + B + E
Feature 21: PULLEY COMBINATION
0 = Standard - None
Feature 22: WARRANTY
0 = Standard - 1 Year Parts
Feature 23: TYPE
0 = Standard
X = Special Pricing Authorization

17
General Information
AAON®V3 Series indoor air handling units
have been designed for indoor installation
only. Units are assembled, wired, charged
with dry nitrogen and run-tested at the
factory. V3 Series units are not intended for
residential use. Startup and service must be
performed by a Factory Trained Service
Technician.
Certification of Gas Heat Models
a. Certified as a Category IV forced air
furnace with or without cooling.
b. Certified for indoor installation.
Certification of Steam or Hot Water Heat
Models
a. Certified as a forced air heating system
with or without cooling.
b. Certified for indoor installation only.
Certification of Electric Heat Models
a. Certified as an electric warm air furnace
with or without cooling.
b. Certified for indoor installation only.
Certification of Cooling Models
a. Certified as a commercial central air
conditioner with or without electrically
operated compressors.
b. Certified for indoor installation only.
c. Certified with refrigerant R-410A coils or
with chilled water cooling coils.
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.
WARNING
These units must not be used for
heating or cooling at any time during
any phase of construction. Very low
return air temperatures, harmful
vapors, and misplacement of the
filters will damage the unit and its
efficiency.
CAUTION
This equipment is protected by a
standard limited warranty under the
condition that initial installation,
service, startup and maintenance is
performed according to the
instructions set forth in this manual.
This manual should be read in its
entirety prior to installation and before
performing any service or
maintenance work.
Equipment described in this manual is
available with many optional
accessories. If you have questions
after reading this manual in its
entirety, consult other factory
documentation or contact your AAON
Sales Representative to obtain further
information before manipulating this
equipment or its optional accessories
CAUTION

18
Codes and Ordinances
V3 Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 1995/CSA C22.2 No. 236,
ANSI Safety Standard Z21.47b-2008/CSA
2.3b-2008, and ANSI Safety Standard Z83.8-
2006/CSA 2.6-2006.
System should be sized in accordance with
the American Society of Heating,
Refrigeration and Air Conditioning
Engineers Handbook.
Installation of V3 Series 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. Units with gas heaters must conform
to the National Fuel Gas Code ANSI Z223.1
(NFPA 54) in the United States and
Can/CGA-B149 Installation Code in Canada.
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
Technical Support for assistance with
handling damaged goods, repairs, and freight
claims: [phone].
Note: Upon receipt check shipment for items
that ship loose such as 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.
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.
CAUTION
Coils and sheet metal surfaces
present sharp edges and care must
be taken when working with
equipment.
WARNING
Failure to observe the following
instructions will result in premature
failure of your system and possible
voiding of the warranty.
WARNING

19
Figure 1 - Lockable Handle
Storage
This equipment is not suitable for outdoor use
of 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
All DX refrigerant coils are factory charged
with a nitrogen holding charge. All DX
systems include evaporator coils and thermal
expansion valves (TXV).
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
split system condensing unit 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
shortened by reduced lubrication and the
pumping of excessive amounts of liquid oil
and refrigerant.
CRANKCASE HEATER
OPERATION
Some units are equipped with
compressor crankcase heaters, which
should be energized at least 24 hours
prior to cooling operation, to clear any
liquid refrigerant from the
compressors.
CAUTION

20
Note: Low Ambient Operation
Air-cooled DX units without a low ambient
option, such as condenser fan cycling or the
0°F low ambient option, will not operate in
the cooling mode of operation properly when
the outdoor temperature is below 55°F. Low
ambient and/or economizer options are
recommended if cooling operation below
55°F is expected.
Gas or Electric Heating
The unit is designed to heat a given amount
of air while operating. If this amount of air is
greatly reduced, approximately 1/3 during
the heating season, the gas heat exchanger or
electric heating coil may overheat, and may
cut the burner or heater off entirely by action
of the safety high temperature limit devices
which are factory mounted at the heat
exchanger and supply fan areas.
Airflow should be adjusted after installation
to obtain an air temperature rise within the
range specified on the unit rating plate at the
required external static pressure.
Should overheating occur with a gas heat
exchanger, or the gas supply fail to shut off,
shut off the manual gas valve to the furnace
before shutting off the electrical supply.
Prolonged overheating of the heat exchanger
will shorten its life.
The maximum supply air temperature from
the gas heater is 140°F and the minimum
allowable entering air temperature is 40°F.
The maximum temperature rise for the gas
heater is 100°F.
Wiring Diagrams
Unit specific wiring diagrams are laminated
and affixed inside the controls compartment
door.
Condensate Drain Pans
Units require field installed drain p-traps and
lines to be connected to the condensate drain
pans of the unit.
For condensate drain lines, the line 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.
See Installation section of this manual for
more information.
Unit should not be operated without a
p-trap. Failure to install a p-trap may
result in overflow of condensate
water.
CAUTION
Emergency drain pan is
recommended for all applications
where a risk of water damage to
surrounding structure or furnishings.
Refer to local codes.
CAUTION