AAON H3 Series Owner's manual

H3 Series
Horizontal Indoor Air Handling Units
UL60335
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 must be kept with the
unit.
WARNING

2
Table of Contents
Safety .............................................................................................................................................. 6
H3 Base Model Description.......................................................................................................... 11
General Information...................................................................................................................... 17
Codes and Ordinances............................................................................................................... 18
Receiving Unit........................................................................................................................... 18
Storage....................................................................................................................................... 19
Wiring Diagrams....................................................................................................................... 19
Installation..................................................................................................................................... 19
Locating the Unit....................................................................................................................... 19
Lifting and Handling the Unit................................................................................................... 23
Unit Assembly........................................................................................................................... 23
Control Box............................................................................................................................... 25
Electrical.................................................................................................................................... 26
Duct Connection........................................................................................................................ 29
Condensate Drain Pans.............................................................................................................. 29
Condensate Drain Piping........................................................................................................... 30
Startup........................................................................................................................................... 31
Filters......................................................................................................................................... 31
Supply Fans............................................................................................................................... 31
Fan Air Flow Adjustment.......................................................................................................... 31
Operation....................................................................................................................................... 33
Thermostat Operation................................................................................................................ 33
Split System DX Cooling Operation and Control..................................................................... 33
Chilled Water or Non-Compressorized DX Cooling Operation............................................... 33
Steam or Hot Water Preheating Operation................................................................................ 33
Electric Heating Operation........................................................................................................ 33
Maintenance.................................................................................................................................. 33
DX Cooling ............................................................................................................................... 34
Condensate Drain Pans.............................................................................................................. 34
Winterizing Coils ...................................................................................................................... 34
Supply Fans............................................................................................................................... 34
E-Coated Coil Cleaning ............................................................................................................ 34
Options.......................................................................................................................................... 36
Heating Coils............................................................................................................................. 36
Chilled Water Coil .................................................................................................................... 37
Direct Expansion (DX) Systems ............................................................................................... 38
Evaporator Coil ......................................................................................................................... 39
Thermal Expansion Valve......................................................................................................... 39
Hot Gas Reheat.......................................................................................................................... 39
Hot Gas Bypass......................................................................................................................... 39
Purge Circuit ............................................................................................................................. 40
Adjusting Refrigerant Charge ................................................................................................... 40
Energy Recovery Units ............................................................................................................. 48
Initial Mechanical Check and Setup...................................................................................... 48

3
Polymer Energy Recovery Wheel .......................................................................................... 49
Energy Recovery Wheel General Cleaning........................................................................... 56
Electric Heating......................................................................................................................... 60
Phase and Brownout Protection Module................................................................................... 61
Filter Replacement .................................................................................................................... 63
Replacement Parts..................................................................................................................... 63
AAON ....................................................................................................................................... 63
Filter Information.......................................................................................................................... 66
Refrigerant Piping Diagrams ........................................................................................................ 70
H3 Series Startup Form................................................................................................................. 71
Maintenance Log .......................................................................................................................... 76
Maintenance Log (E-Coated Coil)................................................................................................ 77
Literature Change History............................................................................................................. 78
G117890 · Rev. A · 230810
(J000051)

4
Index of Tables and Figures
Tables:
Table 1 - H3 Series Clearances (Metric)....................................................................................... 20
Table 2 - H3 Series Clearances (Imperial).................................................................................... 20
Table 3 –Coil Removal Clearances.............................................................................................. 20
Table 4 - Nameplate Voltage Markings & Tolerances................................................................. 26
Table 5 - Control Wiring............................................................................................................... 29
Table 6 - 35 KAIC Fuse Sizing..................................................................................................... 29
Table 7–65 KAIC Fuse Sizing..................................................................................................... 29
Table 8 - Drain Trap Dimensions (Metric)................................................................................... 31
Table 9 –Drain Trap Dimensions (Imperial) ............................................................................... 31
Table 10 - Steam Distributing Coil Sweat Connection Sizes....................................................... 36
Table 11 - Hot Water Coil Sweat Connection Sizes..................................................................... 37
Table 12 - Chilled Water Coil Sweat Connection Sizes............................................................... 37
Table 13 –Minimum and Maximum Coil Pressures and Temperatures...................................... 37
Table 14 - Acceptable Refrigeration Circuit Values..................................................................... 41
Table 15 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values
(Metric)......................................................................................................................................... 42
Table 16 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values
(Imperial) ...................................................................................................................................... 42
Table 17 - R-410A Refrigerant Temperature-Pressure Chart (Metric) ........................................ 44
Table 18 - R-410A Refrigerant Temperature-Pressure Chart (Imperial)...................................... 45
Table 19 - R-454B Refrigerant Temperature-Pressure Chart (Metric)......................................... 46
Table 20 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)...................................... 47
Table 21 - Electric Heating Capacities ......................................................................................... 60
Table 22 - H3 Series A Cabinet Unit Filters................................................................................. 66
Table 23 - H3 Series B Cabinet Unit Filters................................................................................. 66
Table 24 - H3 Series C Cabinet Unit Filters................................................................................. 67
Table 25 - H3 Series D Cabinet Unit Filters................................................................................. 67
Table 26 - H3 Series E Cabinet Unit Filters................................................................................. 68
Table 27 - H3 Series A Cabinet Final Filters................................................................................ 68
Table 28 - H3 Series B Cabinet Final Filters................................................................................ 68
Table 29 - H3 Series C Cabinet Final Filters................................................................................ 69
Table 30 - H3 Series D Cabinet Final Filters................................................................................ 69
Table 31 - H3 Series E Cabinet Final Filters................................................................................ 70
Table 32 - H3 Series Energy Recovery OA Filters (Feature 13 ≠0)........................................... 70
Table 33 - H3 Series Energy Recovery RA Filters (Feature 13 ≠0)........................................... 70

5
Figures:
Figure 1 - Lockable Handle .......................................................................................................... 19
Figure 2 -Minimum Clearance Required for Access to Unit (H3 Series plan view).................... 20
Figure 3 - H3 internal control panel with top access panel removed............................................ 21
Figure 4 - H3 Series Platform Suspension Installation................................................................. 21
Figure 5 - H3 Series Parallel Beam Suspension Installation ........................................................ 22
Figure 6 - H3 Series Unit Orientation........................................................................................... 22
Figure 7 - H3 Schematic with (1) Mixing Box, (2) Air Handler, and (3) Final Filter.................. 23
Figure 8 - Low & High Voltage Quick Connect........................................................................... 23
Figure 9 - Apply Gasket................................................................................................................ 24
Figure 10 - Connect Sections........................................................................................................ 24
Figure 11 - Bar Clamp .................................................................................................................. 24
Figure 12 - Flange Overlap........................................................................................................... 25
Figure 13 - Self-Tapping Screw.................................................................................................... 25
Figure 14 - Back View External Control Box .............................................................................. 25
Figure 15 - External control box electrical connections............................................................... 26
Figure 16 - H3 internal control panel electrical connections........................................................ 27
Figure 17 - Drain Trap.................................................................................................................. 30
Figure 18 - Typical wiring diagram with EC motor..................................................................... 32
Figure 19 - Shows the jumper that is to be removed (jumped between S1 and S2)..................... 32
Figure 20 - Potentiometer ............................................................................................................. 32
Figure 21 - Steam Distributing Piping.......................................................................................... 36
Figure 22 - Hot & Chilled Water Piping....................................................................................... 37
Figure 23 - TXV Bulb Position..................................................................................................... 39
Figure 24 - Hot Gas Purge Circuit................................................................................................ 40
Figure 25 - Energy Recovery Wheel ............................................................................................ 48
Figure 26 - Lifting Hole Locations............................................................................................... 48
Figure 27 - Polymer Energy Recovery Wheel.............................................................................. 49
Figure 28 - Wheel Segment Removal Pattern............................................................................... 53
Figure 29 - H3 A or B Cabinet Energy Recovery Wheel............................................................. 58
Figure 30 - H3 A or B Cabinet Outside Air Filter Access............................................................ 58
Figure 31 - H3 C Cabinet Energy Recovery Wheel ..................................................................... 59
Figure 32 - H3 C Cabinet Outside Air Filter Access.................................................................... 59
Figure 33 - H3 D or E Cabinet Energy Recovery Wheel ............................................................. 59

6
Safety
Attention must 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 technician,
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
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

7
Unit power supply wire must be only
copper or aluminum.
CAUTION
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, must be
followed.
WARNING
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 61
centimeters (24 inches) high to verify
proper center of gravity lift point to
avoid unit damage, injury or death.
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
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 must be checked for
proper operation. Alterations must
only be made at the unit power
connection.
CAUTION

8
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.
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.
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
must 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.
CAUTION
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
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

9
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
This appliance is not intended for use
by persons with reduced physical,
sensory or mental capabilities, or lack
of experience and knowledge, unless
they have been given supervision or
instruction concerning use of the
appliance by a person responsible for
their safety. Children must be
supervised to ensure they do not play
with this appliance.
WARNING
In order to avoid a hazard due to
inadvertent resetting of the THERMAL
CUT-OUT, this appliance must not be
supplied through an external switching
device, such as a timer, or connected to a
circuit that is regularly switched on and
off by the utility.
CAUTION

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. 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 must
be an L shaped duct.
4. 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
5. 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.
6. When pairing with a condensing unit,
ensure the refrigerant pressures for the
paired system do not exceed the
maximum allowable pressures listed on
the unit nameplate.
7. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
8. Keep this manual and all literature
safeguarded near or on the unit.
Units with VFD driven
motors/compressors have adjustable
overload settings. These are set by
the AAON factory for the protection of
these motors/compressors and must
not be adjusted over this factory
setpoint or bypassed.
WARNING

H3/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
H3
-
A
R
B
-
3
-
0
-
1
6
1
C
-
1
2
F
:
A
A
B
B
-
0
C
0
-
F
T
B
-
0
G
0
-
0
0
A
A
A
C
0
0
B
A
0
0
0
0
0
0
0
0
15
16
17
18
19
20
21
22
23
11
H3 Base Model Description
BASE MODEL
SERIES AND GENERATION
H3 = 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 = Standard
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

H3 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
H3
-
A
R
B
-
3
-
0
-
1
6
1
D
-
4
1
F
:
A
A
B
C
-
H
G
A
-
0
0
0
-
0
A
0
-
D
0
A
0
0
C
A
0
0
B
A
P
0
B
0
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
6 = Hot Water (Reheat position)
4 = Steam Distributing
7 = Electric Heating (UL 60335 Compliant)
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)
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
5 = 5 Stage
6 = 6 Stage
S = Modulating/SCR Electric
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
1A: Supply Air Blower Configuration (Continued)
B = 2 Blowers + 2 High Efficiency EC Motors
C = Option A + Piezo Ring
D = Option B + Piezo Rings
E = 1 Blower + 1 Perm Magnet AC Totally Enclosed
Motor + 1 VFD
F = 2 Blowers + 2 Perm Magnet AC Totally
Enclosed Motors + 2 VFDs
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
E = 13.5" Backward Curved Plenum, 50% Width
F = 13.5" Backward Curved Plenum, 70% Width
G = 15" Backward Curved Plenum , 70% Width
H = 22" Backward Curved Plenum, 70% Width
1 = 15'' Backward Curved Plenum
2 = 15'' Backward Curved Plenum, 50% Width
3 = 18.5'' Backward Curved Plenum
4 = 18.5'' Backward Curved Plenum, 70% Width
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)
1 = 1 hp
2 = 2 hp
3 = 3 hp
4 = 5 hp
1D: SUPPLY BLOWER CONTROL/CONTROL
VENDORS
C = Field Installed Controls by Others
D= Field Installed Controls by Others + Isolation
Relays
E = VCC-X AAON Orion Controls System

H3 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
H3
-
A
R
B
-
3
-
0
-
1
6
1
D
-
4
1
F
:
A
A
B
C
-
H
G
A
-
0
0
0
-
0
A
0
-
D
0
A
0
0
C
A
0
0
B
A
P
0
B
0
0
0
0
15
16
17
18
19
20
21
22
23
13
Feature 2: REFRIGERATION OPTIONS
0 = Standard
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
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
W = Options A + H + J
Y = Options B + C + H
Feature 4: ADDITIONAL CONTROLS
Continued
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 = No Mixing Box
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 = No Mixing Box
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 = No Mixing Box
A = 2 Position Actuators (24V)
B = Fully Modulating Actuators (DDC)
C = Fixed Position Dampers
D = Fully Modulating Actuator - Enthalpy Limit
E = Fully Modulating Actuator - Sensible Limit

H3 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
H3
-
A
R
B
-
3
-
0
-
1
6
1
D
-
4
1
F
:
A
A
B
C
-
H
G
A
-
0
0
0
-
0
A
0
-
D
0
A
0
0
C
A
0
0
B
A
P
0
B
0
0
0
0
15
16
17
18
19
20
21
22
23
14
Feature 6: FILTER BOX
6A: PRE FILTER BOX
0 = Standard - None
6B: UNIT FILTER
0 = No Unit Filters
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
F = 2” Pleated - MERV 8 + 4” Pleated - MERV 8
G = 2” Pleated - MERV 8 + 4” Pleated - MERV 11
H = 2” Pleated - MERV 8 + 4” Pleated - MERV 13
J = 2” Pleated - MERV 8 + 4” Pleated - MERV 14
6C: FINAL FILTER BOX
0 = Standard - None
A = 2” Pleated – 30% Eff.
B = 12” Cartridge - MERV 11
C = 12” Cartridge - MERV 13
D = 12” Cartridge - MERV 14
E = 2” Pleated - MERV 8 + 12” Cartridge - MERV11
F = 2” Pleated - MERV 8 + 12” Cartridge - MERV13
G = 2” Pleated - MERV 8 + 12” Cartridge -MERV14
H = 4" Pleated - 30% Eff.
Feature 7: FILTER OPTIONS
0 = No Filter Options
A = Magnehelic Gauge
B = Clogged Filter Switch
C = Options A + B
D = Magnehelic Gauge - Unit Filter + ERV Filter
F = Clogged Filter Switch - Unit Filter + ERV Filter
G = Options D + F
Feature 8: COIL COATING
0 = No Coil Coating
A = E-coated Cooling and Heating Coils
B = Copper Finned Coils + Stainless Steel Coil
Casing
D = Stainless Steel Coil Casing
E = Option A + D
Feature 9: EXPANSION VALVE
0 = No Expansion Valve
A = Thermal Expansion Valves
Feature 10: EXPANSION VALVE
CONTROLS
0 = No Expansion Valve
A = Standard Control
Feature 11: EXTERNAL PAINT
0 = Standard - No Paint
A = AAON Gray Paint
B = Special Paint

H3/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
H3
-
A
R
B
-
3
-
0
-
1
6
1
C
-
1
2
F
:
A
A
B
B
-
0
C
0
-
F
T
B
-
0
G
0
-
0
0
A
A
A
C
0
0
B
A
0
0
0
0
0
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 = No Energy Recovery Wheel
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
Feature 14: POWER
14A: POWER OPTIONS
0 = Standard Power Block
14B: ELECTRICAL RATING
0 = Standard - 5 kAIC
J = 10 kAIC
Feature 15: CONTROL PANEL
0 = Internal Control Panel (Top or Bottom Access
Required)
A = Small Control Panel - 16” x 16”
B = Medium Control Panel - 25” x 22”
C = Large Control Panel - 48” x 22”
Feature 16: SHIPPING SPLITS
0 = No Shipping Splits
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)
Feature 17: ENERGY RECOVERY
CABINET
0 = No Energy Recovery Wheel
B = Side RA + Back EA + Back OA Connections
P = OA + Economizer Dampers - Side RA + Back
EA + Back OA Connections
Feature 18: PREHEAT
0 = Standard - None

H3/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
H3
-
A
R
B
-
3
-
0
-
1
6
1
C
-
1
2
F
:
A
A
B
B
-
0
C
0
-
F
T
B
-
0
G
0
-
0
0
A
A
A
C
0
0
B
A
0
0
0
0
0
0
0
0
15
16
17
18
19
20
21
22
23
16
Feature 19: EXHAUST FAN
0 = No Exhaust Fan
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
M = Option A + Piezo Ring
N = Option B + Piezo Ring
P = Option C + Piezo Ring
Q =Option D + Piezo Ring
R = Option E + Piezo Ring
S = Option F + Piezo Ring
T = Option G + Piezo Rings
U = Option H + Piezo Rings
V = Option J + Piezo Rings
W = Option K + Piezo Rings
Y = Option L + Piezo Rings
Feature 20: CRATING
0 = Standard - None
A = Export Crating
C = Options A + E
E = Shipping Shrink Wrap
Feature 21: ADDITIONAL CONTROLS2
0 = Standard - None
D = High Condensate Level Switch
Feature 22: WARRANTY
0 = Standard - 1 Year Parts
A = 2 Year Parts Only Warranty
(Begins at Date of Shipment)
B = 3 Year Parts Only Warranty
(Begins at Date of Shipment)
C = 4 Year Parts Only Warranty
(Begins at Date of Shipment)
D = 5 Year Parts Only Warranty
(Begins at Date of Shipment)
Feature 23: TYPE
0 = Standard
X = Special Pricing Authorization

17
General Information
AAON®H3 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. H3 Series units are not intended for
residential use. Startup and service must be
performed by a Factory Trained Service
Technician.
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 must 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 must 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
H3 Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 60335-2-40 4th Edition,
ANSI Safety Standard Z21.47-2016.
H3 Series units are rated:
•IEC 60529 IPX0
•UL 60335-2-40 Class I Appliance
Size system in accordance with the American
Society of Heating, Refrigeration and Air
Conditioning Engineers Handbook.
Installation of H3 Series units must conform
to the following codes:
•International Mechanical Code (IMC
2018 where revision not specified by
State)
•Installation of Air Conditioning and
Ventilating Systems Standard (NFPA
90A)
•National Electrical Code (NFPA 70)
Additional conditions for installation outside
of these codes may be required for any
region, state and/or city within the United
States of America. It is the responsibility of
the building system designer, qualified
technician and person(s) responsible for the
operation and maintenance of the AAON
equipment to know and adhere to
International and local code requirements in
conjunction with the requirements of this
document.
Receiving Unit
When received, check the unit for damage
that might have occurred in transit. If damage
is found it must be noted on the carrier’s
Freight Bill. A request for inspection by
carrier’s agent must be made in writing at
once.
Check nameplate to ensure the correct model
sizes and voltages have been received to
match the job requirements.
If repairs must be made to damaged goods,
notify the factory 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
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
owners must secure all doors with locks or
nuts and bolts to prevent unauthorized access.
Figure 1 - Lockable Handle
Storage
This equipment is not suitable foroutdoor 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.
Wiring Diagrams
Unit specific wiring diagrams are laminated
and affixed inside the controls compartment
door.
Installation
AAON equipment has been designed for
quick and easy installation. Startup and
service must be performed by Factory
Trained Service Technician.
The H3 unit can either be shipped assembled
or shipped in sections. See the Unit
Assembly section of this document for
instructions on assembling the sections.
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, foundation or suspension
support 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.
For units with supplementary electric heat
installed with free air discharge, the supply
air discharge opening must be located a
minimum of 1.83 meters (6 feet) above the
finished floor.
Allow adequate space for piping access and
panel removal. To ensure proper access for
field service, maintain minimum
clearances for field piping and other
obstructions as indicated by Table 1 and
Table 2. Consult local building codes for
additional service clearance requirements.

20
Condensate drain connection for the coils is
located on the access side of the unit. See
Table 3 for access dimensions.
Table 1 - H3 Series Clearances (Metric)
Table 2 - H3 Series Clearances (Imperial)
Unit
Size
Access Side
Clearance
(dimension X
on Figure 2) 1
All Other
Sides 2
Top or
Bottom 3
H3-A
36 inches
6 inches
22 in
H3-B
22.5 in
H3-C
27 in
H3-D
45 inches
27 in
H3-E
60 inches
34 in
1. Additional clearance may be required
to allow for coil removal. See
Table 3
2. May be installed flush depending
upon local codes.
3. Top or bottom clearance is 15.2
centimeters (6 inches) if no internal
control panel. For units with internal
control panel, the clearance in the
table is needed for either top or
bottom, but not both. The clearance
is for supply fan removal.
Table 3 –Coil Removal Clearances
Figure 2 -Minimum Clearance Required for
Access to Unit (H3 Series plan view)
Internal Control Panel
H3 units with internal control panel have
removable access panels on the top and
bottom of the supply fan section. The supply
flanges can be interchanged with the access
panels if necessary as the openings have the
same dimensions, except on size E.
Unit
Size
Access Side
Clearance
(dimension X
on Figure 2) 1
All Other
Sides 2
Top or
Bottom 3
H3-A
0.9 meters
15.3 cm
55.9 cm
H3-B
57.2 cm
H3-C
68.6 cm
H3-D
1.1 meters
68.6 cm
H3-E
1.5 meters
86.4 cm
Unit Size
Access Side
H3-A
0.8 m
2.7 ft
H3-B
1.1 m
3.7 ft
H3-C
1.6 m
5.2 ft
H3-D
2.2 m
7.2 ft
H3-E
2.6 m
8.5 ft
X
(See Table 1)
Front (SA)
Back (RA)
Left
Right