AAON RN-140 User Manual

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RN SERIES

Packaged Rooftop Units, Heat Pumps,

& Outdoor Air Handling Units

Installation, Operation,

& Maintenance

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in serious injury, death or property damage.

Be sure to read and understand the installation, operation, and service instructions in this manual.

Improper installation, adjustment, alteration, service, or maintenance can cause serious injury, death, or property damage.

A copy of this IOM should be kept with the unit.

WARNING

oDo not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance

oWHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electrical switch; do not use any phone in your building.

Leave the building immediately.

Immediately call your gas supplier from a phone remote from the building. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

oStartup and service must be performed by a Factory Trained Service Technician.

Table of Contents
Safety ..............................................................................................................................................	8
RN Series Feature String Nomenclature.......................................................................................	13
General Information......................................................................................................................	24
Codes and Ordinances ..............................................................................................................	24
Receiving Unit ..........................................................................................................................	25
Packaged Direct Expansion (DX) Units ...................................................................................	26
Gas or Electric Heating.............................................................................................................	27
Wiring Diagrams.......................................................................................................................	29
Condensate Drain Pan...............................................................................................................	29
Installation.....................................................................................................................................	30
Locating Units...........................................................................................................................	30
Setting the Curb ........................................................................................................................	31
Forklifting the Unit (6-25 and 30 ton) ......................................................................................	37
Lifting the Unit .........................................................................................................................	37
Duct Connection .......................................................................................................................	41
Seismic Curb Installation..........................................................................................................	42
Outside Air Rain Hood .............................................................................................................	46
End Flashing Installation ..........................................................................................................	47
Metal Mesh Filters (6-25 and 30 ton Units) .............................................................................	48
Electrical ...................................................................................................................................	49
Variable Speed Compressors ................................................................................................	51
Thermostat Control Wiring...................................................................................................	51
Gas Heating...............................................................................................................................	52
Piping Sizing Examples ........................................................................................................	54
Inlet and Manifold Pressures ................................................................................................	54
Gas Pressure Regulator & Overpressure Protection Device .................................................	54
Piping Supports .....................................................................................................................	54
Additional Gas Piping Considerations..................................................................................	55
Leak Testing..........................................................................................................................	56
Refrigerant-to-Water Heat Exchanger ......................................................................................	58
Water-Source Heat Pump Applications ................................................................................	58
Open Loop Applications .......................................................................................................	58
Freezing Water in the Heat Exchanger .................................................................................	59
Water Piping .........................................................................................................................	59
Condensate Drain Piping ..........................................................................................................	61
Heating Coils ............................................................................................................................	62
Chilled Water Coil ....................................................................................................................	62
Electric Preheat .........................................................................................................................	63
Energy Recovery Units .............................................................................................................	63
Startup ...........................................................................................................................................	71
Supply Fans...............................................................................................................................	71
Power Return Axial Flow Fans (16-25 and 30 tons) ................................................................	72
Power Return and Exhaust Axial Flow Fans (26 and 31-140 tons)..........................................	74
Filters ........................................................................................................................................	75
Adjusting Refrigerant Charge ...................................................................................................	75

Checking Liquid Sub-Cooling ..............................................................................................	76
Checking Evaporator Superheat............................................................................................	76
Adjusting Sub-cooling and Superheat Temperatures............................................................	77
Gas Heater Instructions.............................................................................................................	79
Condenser Fan Electronically Commutated Motor (ECM) Startup .........................................	80
VFD Controlled Condenser Fan Startup...................................................................................	81
Operation.......................................................................................................................................	82
Thermostat Operation ...............................................................................................................	82
Packaged DX Cooling Operation and Control .........................................................................	82
Gas Heater Operation................................................................................................................	82
Electric Heating Operation .......................................................................................................	83
Steam or Hot Water Preheating and Heating Operation...........................................................	83
Modulating Electric Preheat .....................................................................................................	83
Chilled Water or Non-Compressorized DX Cooling Operation...............................................	83
Maintenance ..................................................................................................................................	84
Gas Heating...............................................................................................................................	84
Gas Heat Exchanger Removal ..................................................................................................	85
DX Cooling...............................................................................................................................	85
Condenser Fans (6-25 and 30 ton) ............................................................................................	86
Condensate Drain Pans .............................................................................................................	86
Evaporator Coil (6-25 and 30 ton) ............................................................................................	87
Brazed Plate Heat Exchanger Cleaning ....................................................................................	87
E-Coated Coil Cleaning ............................................................................................................	88
Microchannel Coil Cleaning .....................................................................................................	89
Supply Fans...............................................................................................................................	90
Phase and Brownout Protection ................................................................................................	91
Variable Capacity Compressor Controller................................................................................	92
Filter Replacement ....................................................................................................................	93
Replacement Parts...................................................................................................................	105
Appendix A - Heat Exchanger Corrosion Resistance.................................................................	106
Appendix B - Thermistor Temperature vs. Resistance Values...................................................	108
RN Series Startup Form ..............................................................................................................	109
Maintenance Log ........................................................................................................................	113
Literature Change History...........................................................................................................	114
R90721 · Rev. B · 140225

Index of Tables and Figures
Tables:
Table 1 - Electric and Gas Heating Capacities .............................................................................	28
Table 2 - A Cabinet Unit Clearances ............................................................................................	30
Table 3 - B Cabinet Unit Clearances ............................................................................................	30
Table 4 - C Cabinet Unit Clearances ............................................................................................	31
Table 5 - D Cabinet Unit Clearances ............................................................................................	31
Table 6 - E Cabinet Unit Clearances.............................................................................................	31
Table 7 - Variable Speed Compressor VFD Frequency Range ....................................................	51
Table 8 - Control Wiring...............................................................................................................	51
Table 9 - 6-8 and 10 ton Gas Connections....................................................................................	52
Table 10 - 9 and 11-15 ton Gas Connections................................................................................	52
Table 11 - 16-25 and 30 ton ..........................................................................................................	52
Table 12 - 26 and 31-70 ton ..........................................................................................................	52
Table 13 - 55, 65 and 75-140 ton Gas Connections......................................................................	53
Table 14 - Natural Gas (ft3/hr) Maximum Piping Capacities .......................................................	53
Table 15 - Propane (kBtu/hr) Maximum Piping Capacities .........................................................	53
Table 16 - Gas Piping Supports ....................................................................................................	55
Table 17 - Glycol Freezing Points ................................................................................................	59
Table 18 - Standard Brazed Plate Heat Exchanger Water Connections .......................................	60
Table 19 - SMO 254 Brazed Plate Heat Exchanger Water Connections......................................	60
Table 20 - Steam Coil Connection Sizes ......................................................................................	62
Table 21 - Hot Water Coil Connection Sizes................................................................................	62
Table 22 - Chilled Water Coil Connection Sizes..........................................................................	62
Table 23 - Pin Location.................................................................................................................	74
Table 24 - Pin Groove Location....................................................................................................	74
Table 25 - Acceptable Refrigeration.............................................................................................	77
Table 26 - R-410A and R-22 Refrigerant Temperature-Pressure Chart .......................................	78
Table 27 - ECM Condenser Fan Cycling Options ........................................................................	80
Table 28 - Demand Signal vs. Compressor Capacity Modulation................................................	93
Table 29 - 6-8 and 10 ton Pre Filters ............................................................................................	94
Table 30 - 9 and 11-15 ton Pre Filters ..........................................................................................	94
Table 31 - 16-25 and 30 ton Pre Filters ........................................................................................	94
Table 32 - 26, 31, and 40 ton Pre Filters.......................................................................................	94
Table 33 - 50, 60, and 70 ton Pre Filters.......................................................................................	95
Table 34 - 55, 65, and 75 ton Pre Filters.......................................................................................	95
Table 35 - 90-140 ton Pre Filters ..................................................................................................	95
Table 36 - 6-8 and 10 ton Unit Filters...........................................................................................	96
Table 37 - 9 and 11 ton Unit Filters ..............................................................................................	96
Table 38 - 13 and 15 ton Unit Filters ............................................................................................	97
Table 39 - 16-25 and 30 ton Unit Filters.......................................................................................	97
Table 40 - 26, 31, and 40 ton Unit Filters .....................................................................................	98
Table 41 - 50, 60, and 70 ton Unit Filters .....................................................................................	98
	5

Table 42 - 55, 65, and 75 ton Unit Filters .....................................................................................		98
Table 43 - 90-140 ton Unit Filters ................................................................................................		99
Table 44 - 6-8 and 10 ton Energy Recovery Wheel Filters ..........................................................		99
Table 45 - 9 and 11-15 ton Energy Recovery Wheel Filters ........................................................		99
Table 46 - 16-25 and 30 ton Energy Recovery Wheel Filters ......................................................		99
Table 47	- 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters .......................................	100
Table 48	- 55, 65, and 75-140 ton Energy Recovery Wheel Filters ...........................................	100
Table 49	- 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters .......................................	100
Figures:
Figure 1 - Lockable Handle ..........................................................................................................		26

Figure 2 - RN Series A, B and C Cabinet, .................................................................................... 31 Figure 3 - RN Series D Cabinet, ................................................................................................... 31 Figure 4 - RN Series E Cabinet,.................................................................................................... 31

Figure 5 - RN Series 6-8 and 10 ton Unit Gasket Locations ........................................................		33
Figure 6	- RN Series 9 and 11-15 ton Unit Gasket Locations ......................................................	34
Figure 7	- RN Series 16-25 and 30 ton Unit Gasket Locations ....................................................	35
Figure 8	- RN Series 26, 31-50, 60, and 70 ton Unit Gasket Locations .......................................	36
Figure 9	- Forklifting an RN Series A, B and C Cabinet, 6-25 and 30 tons .................................	37
Figure 10 - Lifting Details of a 6-25 and 30 ton Standard or Power Exhaust Unit ......................		38

Figure 11 - Lifting Details of a 6-25 and 30 ton Energy Recovery Wheel or Power Return Unit 39

Figure 12 - Lifting Details of a 26, 31-50, 60 and 70 ton Unit.....................................................		39
Figure 13 - Lifting Details of a 55, 65 and 75-140 ton Unit.........................................................		40
Figure 14 - Duct Connection.........................................................................................................		41
Figure 15 - Solid Bottom Seismic Curb with Filters ....................................................................		42
Figure 16 - Seismic Solid Bottom Curb without Filters Cross Section ........................................		43
Figure 17 - Seismic Solid Bottom Curb without Filters Detail A.................................................		43
Figure 18 - Seismic Solid Bottom Curb without Filters Detail B.................................................		43
Figure 19 - Seismic Rigid Mount Curb.........................................................................................		44
Figure 20 - 90-140 ton Condenser Coil Guard Installation Instructions 1 ...................................		45
Figure 21 - 90-140 ton Condenser Coil Guard Installation Instructions 2 ...................................		46
Figure 22 - 6-25 and 30 ton...........................................................................................................		47
Figure 23 - 6-25 and 30 ton...........................................................................................................		47
Figure 24	- 26 and 31-140 ton.......................................................................................................	47
Figure 25	- Factory Supplied End Flashings.................................................................................	48
Figure 26	- Rain Hood with Metal Mesh Filter Rack Installation ................................................	48
Figure 27	- Unit Utility Entry .......................................................................................................	49

Figure 28 - Back View of Power Switch from Compressor and Control Compartment (6-50, 60,

and 70 ton Units)...........................................................................................................................		49
Figure 29 - Front View of Utility Entry and Power Switch from Control Compartment (55, 65
and 75-140 ton Units) ...................................................................................................................		50
Figure 30 - RN Series Gas Heat Exchanger..................................................................................		53
Figure 31 - Example 6-25 and 30 ton through the Base Gas Piping.............................................		56
Figure 32	- Supply Fan Banding...................................................................................................	72
Figure 33	- Fan with the HUB on the Top and RET on the Bottom.............................................	73
Figure 34	- Bushing Mount Location............................................................................................	73
6

Figure 35 - RET with Pin in Groove 4..........................................................................................	73
Figure 36 - Fan HUB and RET Castings ......................................................................................	73
Figure 37 - Assembled Fan ...........................................................................................................	74
Figure 38 - Back of the Fan ..........................................................................................................	74
Figure 39 - Pin Groove Location ..................................................................................................	75
Figure 40 - Pitch Pin Location ......................................................................................................	75
Figure 41 - Example Pitch Pin ......................................................................................................	75
Figure 42 - Gas Heater Instructions ..............................................................................................	79
Figure 43 - Gas Heat Exchanger ...................................................................................................	85
Figure 44 - Removal of a Condenser Fan Assembly ....................................................................	86
Figure 45 - Evaporator Coil Access..............................................................................................	87
Figure 46 - 9-25 and 30 ton Supply Fan .......................................................................................	90
Figure 47 - Bolts which Connect Motor Mount to Blower Fan....................................................	90
Figure 48 - Voltage Monitor .........................................................................................................	91
Figure 49 - Variable Capacity Compressor Controller .................................................................	92
Figure 50 - Compressor Controller Flash Code Details................................................................	93
Figure 51 - RN Series 6-8 and 10 ton Standard Filter Layout ....................................................	101
Figure 52 - RN Series 9 and 11-15 ton Standard Filter Layout ..................................................	101
Figure 53 - RN Series 16-25 and 30 ton Standard Filter Layout ................................................	102
Figure 54 - RN Series 26, 31, and 40 ton Standard Filter Layout ..............................................	102
Figure 55 - RN Series 50-, 60, and 70 ton Standard Filter Layout .............................................	103
Figure 56 - RN Series 55, 65, and 75 ton Standard Filter Layout, 2” Filters .............................	103
Figure 57 - RN Series 55, 65, and 75 ton Standard Filter Layout, 4” Filters .............................	104
Figure 58 - RN Series 90-140 ton Standard Filter Layout, 2” filters..........................................	104
Figure 59 - RN Series 90-140 ton Standard Filter Layout, 4” Filters and 2” Pre-Filters with 4”
High Efficiency Filters................................................................................................................	105

Safety

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.

WARNING

ELECTRIC SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous operation, serious injury, death, or property damage.

Before servicing, disconnect all electrical power to the furnace. 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.

CAUTION

WHAT TO DO IF YOU SMELL GAS

Do not try to turn on unit.

Shut off main gas supply.

Do not touch any electric switch.

Do not use any phone in the building.

Never test for gas leaks with an open flame.

Use a gas detection soap solution and check all gas connections and shut off valves.

WARNING

Electric shock hazard. Before servicing, shut off 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

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

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

VARIABLE FREQUENCY DRIVES

Do not leave VFDs unattended in hand mode or manual bypass. Damage to personnel or equipment can occur if left unattended. When in hand mode or manual bypass mode VFDs will not respond to controls or alarms.

CAUTION

Electric motor over-current protection and overload protection may be a function of the Variable Frequency Drive to which the motors are wired. Never defeat the VFD motor overload feature. The overload ampere setting must not exceed 115% of the electric motor’s FLA rating as shown on the motor nameplate.

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 24 inches high to verify proper center of gravity lift point to avoid unit damage, injury or death.

CAUTION

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 AND COMPRESSORS of 3 phase units at startup by a qualified service technician. Scroll compressors are directional and can be damaged if rotated in the wrong direction. Compressor rotation must be checked using suction and discharge gauges. Fan motor rotation should be checked for proper operation. Alterations should only be made at the unit power connection

WARNING

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

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

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.

CAUTION

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

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.

CAUTION

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

Door compartments containing hazardous voltage or rotating parts are equipped with door latches to allow locks. Door latch are shipped with nut and bolts requiring tooled access. If you do not replace the shipping hardware with a pad lock always re-install the nut & bolt after closing the door.

CAUTION

Cleaning the cooling tower or condenser water loop with harsh chemicals such as hydrochloric acid (muriatic acid), chlorine or other chlorides, can damage the refrigerant-to-water heat exchanger. Care should be taken to avoid allowing chemicals to enter the refrigerant-to-water heat exchanger. See Appendix A - Heat Exchanger Corrosion Resistance for more information.

WARNING

OPEN LOOP APPLICATIONS

Failure of the condenser as a result of chemical corrosion is excluded from coverage under AAON Inc. warranties and the heat exchanger manufacturer’s warranties.

WARNING

WATER FREEZING

Failure of the condenser due to freezing will allow water to enter the refrigerant circuit and will cause extensive damage to the refrigerant circuit components. Any damage to the equipment as a result of water freezing in the condenser is excluded from coverage under AAON warranties and the heat exchanger manufacturer warranties.

WARNING

COMPRESSOR CYCLING

5 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 5 minutes.

5 MINUTE MINIMUM ON TIME To maintain the proper oil level compressors must cycle on for a minimum of 5 minutes.

The cycle rate must not exceed 6 starts per hour.

1.Startup and service must be performed by a Factory Trained Service Technician.

2.Use only with type of the gas approved for the furnace. Refer to the furnace rating plate.

3.The unit is for outdoor use only. See General Information section for more information.

4.Provide adequate combustion ventilation air to the furnace. If a vent duct extension is used, a class III approved vent is required. See the Locating Units and Gas Heating sections of the Installation section of the manual.

5.Always install and operate furnace within the intended temperature rise range and duct system external static pressure (ESP) as specified on the unit nameplate.

6.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.

7.Clean furnace, duct and components upon completion of the construction setup. Verify furnace operating conditions including input rate, temperature rise and ESP.

8.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.

9.READ THE ENTIRE INSTALLATION, OPERATION AND MAINTENANCE MANUAL. OTHER IMPORTANT SAFETY PRECAUTIONS ARE PROVIDED THROUGHOUT THIS MANUAL.

10.Keep this manual and all literature safeguarded near or on the unit.

RN Series Feature String Nomenclature

BASE MODEL

SERIES AND GENERATION

UNIT SIZE

006 = 6 ton Capacity

007 = 7 ton Capacity

008 = 8 ton Capacity

009 = 9 ton Capacity

010 = 10 ton Capacity

011 = 11 ton Capacity

013 = 13 ton Capacity

015 = 15 ton Capacity

016 = 16 ton Capacity

018 = 18 ton Capacity

020 = 20 ton Capacity

025 = 25 ton Capacity

026 = 26 ton Capacity

030 = 30 ton Capacity

031 = 31 ton Capacity

040 = 40 ton Capacity

050 = 50 ton Capacity

055 = 55 ton Capacity

060 = 60 ton Capacity

065 = 65 ton Capacity

070 = 70 ton Capacity

075 = 75 ton Capacity

090 = 90 ton Capacity

105 = 105 ton Capacity

120 = 120 ton Capacity

130 = 130 ton Capacity

140 = 140 ton Capacity

VOLTAGE

1= 230V/1Φ/60Hz

2= 230V/3Φ/60Hz

3= 460V/3Φ/60Hz

4= 575V/3Φ/60Hz

8= 208V/3Φ/60Hz

9= 208V/1Φ/60Hz

INTERIOR PROTECTION

0 = Standard - Vertical Discharge and Return

A = Interior Corrosion Protection - Vertical

Discharge and Return

Model Option A: COOLING/HEAT

PUMP

A1: REFRIGERANT STYLE

0 = Air Handling Unit

B= R-410A - High Efficiency

C= R-410A - Standard Efficiency

E = R-410A Variable Capacity Scroll Compressor -

High Efficiency

F = R-410A Variable Capacity Scroll Compressor -

Standard Efficiency

J = R-410A VFD Compatible Scroll Compressor

K = R-410A VFD Compatible Scroll Compressor +

Microchannel Condenser

A2: UNIT CONFIGURATION

0 = No Cooling

A = Air-Cooled Cond. + Std Evap. Coil

B = Air-Cooled Cond. + 6 Row Evap. Coil J = Water-Cooled Cond. + Std Evap. Coil

K = Water-Cooled Cond. + 6 Row Evap. Coil

P = Air-Cooled Cond. + 6 Row Evap. Coil + Mixed Air Bypass

Q = Air-Cooled Cond. + 6 Row Evap. Coil + Return Air Bypass

R = Water-Cooled Cond. + 6 Row Evap. Coil + Return Air Bypass

T = Water-Cooled Cond. + 6 Row Evap. Coil + Mixed Air Bypass

U = Chilled Water Coil - 4 Row

W = Chilled Water Coil - 6 Row

2 = Non-Compressorized + Std Evap. Coil

4 = Non-Compressorized + 6 Row Evap. Coil

6= Air-Source Heat Pump

7= Water-Source/Geothermal Heat Pump

RN Series Feature String Nomenclature

Model Option A: COOLING/HEAT

PUMP

A3: COIL COATING

0 = Standard

1= Polymer E-Coated Evap. and Cond.

2= Stainless Steel Casing Evap and Cond

8= Polymer E-Coated Cond.

9= Polymer E-Coated Cooling Coil

A = Stainless Steel Evap. Coil Casing + Polymer E- Coated Cond. Coil

B = Stainless Steel Casing Cond & Polymer E- Coated Cooling Coil

C = Stainless Steel Casing Cond. Only D = Stainless Steel Cooling Coil Casing

A4: COOLING/HEAT PUMP STAGING

0 = No Cooling

1 = 1 Stage

2 = 2 Stage

4 = 4 Stage

9 = Modulating - Lead VCC

A = Modulating - All VCC

B = 1 Stage + 1 Stage Auxiliary Heat

C = 2 Stage + 1 Stage Auxiliary Heat

D = 4 Stage + 1 Stage Auxiliary Heat

E = Modulating - Lead VCC + 1 Stage Aux. Heat F = Modulating - All VCC + 1 Stage Aux. Heat H = Single Serpentine 8 fpi

J = Half Serpentine 8 fpi

K = Single Serpentine 10 fpi L = Half Serpentine 10 fpi M = Single Serpentine 12 fpi N = Half Serpentine 12 fpi

P = 1 Stage + 2 Stage Auxiliary Heat

Q = 2 Stage + 2 Stage Auxiliary Heat

R = 4 Stage + 2 Stage Auxiliary Heat

S = Modulating - Lead VCC + 2 Stage Aux. Heat T = Modulating - All VCC + 2 Stage Aux. Heat U = 1 Stage + 4 Stage Auxiliary Heat

V = 2 Stage + 4 Stage Auxiliary Heat W = 4 Stage + 4 Stage Auxiliary Heat

Y = Modulating - Lead VCC + 4 Stage Aux. Heat Z = Modulating - All VCC + 4 Stage Aux. Heat

Model Option B: HEATING

B1: HEATING TYPE

0 = No Heating

1 = Electric Heat

2 = Natural Gas Aluminized

3 = Natural Gas Stainless Steel

4 = High Altitude Natural Gas Aluminized

5 = High Altitude Natural Gas Stainless Steel

6 = LP Gas Aluminized

7 = LP Gas Stainless Steel

8 = High Altitude LP Gas Aluminized

9 = High Altitude LP Gas Stainless Steel C = Steam Distributing Standard

D= Steam Distributing Polymer E-Coated

E= Hot Water Standard

F= Hot Water Polymer E-Coated

RN Series Feature String Nomenclature

B2: HEATING DESIGNATION

0 = No Heating

1 = Heat 1

2 = Heat 2

3 = Heat 3

4 = Heat 4

6 = Heat 6

7 = Heat 7

8 = Heat 8

9 = Heat 9

A = Heat A

B = Heat B

C = Heat C

D = Heat D

E = Heat E

F = Heat F

G = Heat G

H = 1 Row Coil

J = 2 Row Coil

K = Heat K

L = Heat L

M = Heat M

N = Heat N

P = Heat P

Model Option B: HEATING

B3: HEATING STAGING

0 = No Heating

1 = 1 Stage

2 = 2 Stage

3 = 3 Stage

4 = 4 Stage

5 = 5 Stage

6 = 6 Stage

7 = 7 Stage

8 = 8 Stage

9 = Modulating Gas/SCR Electric

A = Modulating/SCR Electric, 0-10V Control Signal H = Single Serpentine 8 fpi

J = Half Serpentine 8 fpi

K = Single Serpentine 10 fpi L = Half Serpentine 10 fpi M = Single Serpentine 12 fpi N = Half Serpentine 12 fpi

Feature 1: RETURN/OUTSIDE AIR

1A: RETURN/OUTSIDE AIR SECTION

0 = Manually Adjustable OA Opening + RA Opening A = Economizer

B = Econ + Power Exhaust

C = Econ + Power Return

D = Econ + PE - Discharge Damper Volume Control E = Econ + PE - Discharge Damper Volume Control + 0-10V External Control

F = Low cfm Total Energy Recovery Wheel G = Low cfm Total ERW + Bypass

H = Low cfm Sensible ERW

J = Low cfm Sensible ERW + Bypass K = 100% Outside Air - No Return Air

L = Motorized Outside Air Damper + RA Opening M = Motorized Outside Air Damper - No Return Air N = Empty ERW Option Box - No Power Exhaust P = Empty ERW Option Box + Power Exhaust

Q = 1% Purge Low cfm Total ERW

R = 1% Purge Low cfm Total ERW + Bypass S = 1% Purge Low cfm Sensible ERW

T = 1% Purge Low cfm Sensible ERW + Bypass U = High cfm Total ERW

V = High cfm Total ERW + Bypass W = High cfm Sensible ERW

Y = High cfm Sensible ERW + Bypass Z = 1% Purge High cfm Total ERW

1 = 1% Purge High cfm Total ERW + Bypass 2 = 1% Purge High cfm Sensible ERW

3 = 1% Purge High cfm Sensible ERW + Bypass

4 = Single Total Energy Recovery Wheel + Bypass

5 = 100% Return Air

RN Series Feature String Nomenclature

Feature 1: RETURN/OUTSIDE AIR

1B: RETURN/EXHAUST AIR BLOWER CONFIGURATION

0 = Standard – None

A = 1 Blower + Standard Eff. Motor C = 1 Blower + Premium Eff. Motor D = 2 Blowers + Premium Eff. Motors E = 1 Blower + Premium Eff. + 1 VFD

F = 2 Blowers + Premium Eff. + 1 VFD G = 2 Blowers + Premium Eff. + 2 VFDs

1C: RETURN/EXHAUST AIR BLOWER

0 = Standard - None

A = 12”x9” Forward Curved

B = 15” Backward Curved Plenum

C = 18.5” Backward Curved Plenum

D = 22” Backward Curved Plenum

F = 27” Backward Curved Plenum

G = 22” Direct Drive Axial Flow

H = 35.5” Direct Drive Axial Flow

J = 15” BC Plenum - 50% Width with Banding K = 18.5” BC Plenum - 70% Width with Banding L = 22” BC Plenum - 70% Width with Banding M = 27” BC Plenum - 70% Width with Banding

N = 30” Backward Curved Plenum

P = 42” 9 Blade Direct Drive Axial Flow Q = 42” 12 Blade Direct Drive Axial Flow R = 24” Backward Curved Plenum

S = 33” Backward Curved Plenum

1D: RETURN/EXHAUST AIR BLOWER MOTOR

0 = Standard - None C = 1 hp - 1760 rpm D = 2 hp - 1760 rpm E = 3 hp - 1760 rpm F = 5 hp - 1760 rpm G = 7.5 hp - 1760 rpm H = 10 hp - 1760 rpm L = 15 hp - 1760 rpm M = 20 hp - 1760 rpm N = 1 hp - 1170 rpm P = 2 hp - 1170 rpm Q = 3 hp - 1170 rpm R = 5 hp - 1170 rpm S = 7.5 hp - 1170 rpm T = 10 hp - 1170 rpm U = 15 hp - 1170 rpm V = 20 hp - 1170 rpm W = 25 hp - 1170 rpm Y = 30 hp - 1170 rpm 3 = 25 hp - 1760 rpm 4 = 30 hp - 1760 rpm 5 = 40 hp - 1760 rpm 6 = 50 hp - 1760 rpm

RN Series Feature String Nomenclature

Feature 2: OUTSIDE AIR CONTROL	Feature 3: HEAT OPTIONS
0 = Standard - None	0 = Standard - None
A = 3 Position Actuator - Sensible Limit	A = Regulator (2psi) with vent limiting device
B = 3 Position Actuator - Enthalpy Limit	B = Regulator (5psi) with vent limiting device
C = Fully Modulating Actuator - Sensible Limit	C = Regulator (2psi) vented
D = Fully Modulating Actuator - Enthalpy Limit	D = Regulator (5psi) vented
E = DDC Actuator	E = Discharge Air Override
F = Constant Volume Outside Air	F = Options A + E
G = Options A + F	G = Options B + E
H = Options B + F	H = Options C + E
J = Options C + F	J = Options D + E
K = Options D + F	K = Auxiliary Heat K
L = Options E + F	L = Auxiliary Heat L
M = 3 Pos. Act. - Sensible Limit + CO2 Override	M = Auxiliary Heat M
N = 3 Pos. Act. - Enthalpy Limit + CO2 Override	N = Auxiliary Heat N
P = Fully Mod. Act. - Sensible + CO2 Override	P = Auxiliary Heat P
Q = Fully Mod. Act. - Enthalpy + CO2 Override	Q = Auxiliary Heat Q
R = DDC Actuator + CO2 Override	R = Auxiliary Heat R
S = Dual Minimum Position Potentiometers + Fully	S = Auxiliary Heat S
Mod. Act. - Sensible Limit	T = Auxiliary Heat T
T = Dual Minimum Position Potentiometers + Fully	U = Auxiliary Heat U
Mod. Act. - Enthalpy Limit	V = Auxiliary Heat V
U = 2 Position Actuator	W = Auxiliary Heat W

Feature 4: MAINTENANCE OPTIONS

0 = Standard - None

A = Field Wired 115V Outlet

B = Factory Wired 115V Outlet

C = Blower Aux. Contact

D = Remote Start/Stop Terminals

E = Options A + C

F = Options A + D

G = Options B + C

H = Options B + D

J = Options A + C + D

K = Options B + C + D

L = Options C + D

RN Series Feature String Nomenclature

Feature 5: SUPPLY AIR OPTIONS

5A: SUPPLY AIR BLOWER CONFIGURATION

0 = 1 Blower + Standard Eff. Motor A = 2 Blowers + Standard Eff. Motors B = 1 Blower + Premium Eff. Motor C = 2 Blowers + Premium Eff. Motors

D = 1 Blower + Premium Eff. + 1 VFD

F = 2 Blowers + Premium Eff. + 1 VFD

G = 2 Blowers + Premium Eff. + 2 VFDs

5B: SUPPLY AIR BLOWER

B = 15” Backward Curved Plenum

C = 18.5” Backward Curved Plenum

D = 24” Backward Curved Plenum

E = 27” Backward Curved Plenum

F = 30” BC Plenum - 90% Width + 1750 rpm Max - Aluminum Wheel

G = 15” BC Plenum - 70% Width

H = 18.5” BC Plenum - 70% Width

J = 18.5” Backward Curved Plenum

K = 18.5” BC Plenum - 60% Width

L = 30” BC Plenum - 1600 rpm Max - Aluminum Wheel

M = 13.5” Backward Curved Plenum

N = 13.5” BC Plenum - 70% Width P = 24” BC Plenum - 60% Width Q = 27” BC Plenum - 60% Width R = 22” Backward Curved Plenum S = 22” BC Plenum - 70% Width

T= 17” Backward Curved Plenum

U= 17” BC Plenum - 70% Width

V= 33” Backward Curved Plenum

W= 36.5” Backward Curved Plenum

Y= 42.5” Backward Curved Plenum

5C: SUPPLY AIR BLOWER MOTOR

C = 1 hp - 1760 rpm D = 2 hp - 1760 rpm E = 3 hp - 1760 rpm F = 5 hp - 1760 rpm G = 7.5 hp - 1760 rpm H = 10 hp - 1760 rpm L = 15 hp - 1760 rpm M = 20 hp - 1760 rpm N = 1 hp - 1170 rpm P = 2 hp - 1170 rpm Q = 3 hp - 1170 rpm R = 5 hp - 1170 rpm S = 7.5 hp - 1170 rpm T = 10 hp - 1170 rpm U = 15 hp - 1170 rpm V = 20 hp - 1170 rpm W = 25 hp - 1170 rpm Y = 30 hp - 1170 rpm 3 = 25 hp - 1760 rpm 4 = 30 hp - 1760 rpm 5 = 40 hp - 1760 rpm 6 = 50 hp - 1760 rpm

Feature 6: FILTERS

6A: PRE FILTER

0 = Standard - None

A = 2” Pleated - 30% Eff. - MERV 8 B = Metal Mesh Outside Air Filter C = Lint Screen Filter

D = Exhaust Air ERW Filter F = Options A + D

G = Options B + D

H = Options A + B + D

6B: UNIT FILTER

0 = 2” Throwaway

or 2” Pleated - 30% Eff. - MERV 8 A = 2” Pleated - 30% Eff. - MERV 8 B = 4” Pleated - 30% Eff. - MERV 8

C = 2” Permanent Filter + Replaceable Media F = 4” Pleated - 65% Eff. - MERV 11

G = 4” Pleated - 85% Eff. - MERV 13 H = 4” Pleated - 95% Eff. - MERV 14

RN Series Feature String Nomenclature

6C: FILTER OPTIONS

0 = Standard

A = Clogged Filter Switch

B = Magnehelic Gauge

C = Options A + B

Feature 7: REFRIGERATION CONTROL

0 = Standard

A = 5 Min. Time Delay Relay - Comp. Off

B = 20 Sec. Time Delay Relay - Comp. Staging C = Fan Cycling

D = Adjustable Lockouts - Each Circuit E = Freeze Stats - Each Circuit

F = Options A + B

G = Options A + C

H = Options A + D

J = Options A + E

K = Options B + C

L = Options B + D

M = Options B + E

N = Options C + D

P = Options C + E

Q = Options D + E

R = Options A + B + C

S = Options A + B + D

T = Options A + B + E

U = Options A + C + D

V = Options A + C + E

W = Options A + D + E

Y = Options B + C + D

Z = Options B + C + E

1 = Options B + D + E

2 = Options C + D + E

3 = Options A + B + C + D

4 = Options A + B + C + E

5 = Options A + B + D + E

6 = Options A + C + D + E

7 = Options B + C + D + E

8 = Options A + B + C + D + E

Feature 8: REFRIGERATION OPTIONS

0 = Standard

A = Hot Gas Bypass Lead Stage

or Hot Gas Bypass Lag Stage with Lead Variable Capacity Compressor

B = Hot Gas Bypass Lead and Lag Stages C = Hot Gas Reheat

D = Modulating Hot Gas Reheat E = 0°F Low Ambient Lead Stage F = Options A + C

G = Options B + C

H = Options A + D

J = Options B + D

K = Options A + E

L = Options B + E

Feature 9: REFRIGERATION ACCESSORIES

0 = Standard

A = Sight Glass

B = Compressor Isolation Valves C = Options A + B

D = ECM Condenser Fan - Multiple Speed

E = ECM Condenser Fan - Head Pressure Control F = VFD Controlled Condenser Fans - Variable Speed

G = Options A + D

H = Options B + D

J = Options A + B + D K = Options A + E

L = Options B + E

M = Options A + B + E N = Options A + F

P = Options B + F

Q = Options C + F

Feature 10: POWER OPTIONS

0 = Standard Power Block A = 100 Amp Power Switch B = 150 Amp Power Switch C = 225 Amp Power Switch D = 400 Amp Power Switch E = 600 Amp Power Switch F = 60 Amp Power Switch 5 = 800 Amp Power Switch

6 = 1200 Amp Power Switch

RN Series Feature String Nomenclature

Feature 11: SAFETY OPTIONS	Feature 12: CONTROLS
0 = Standard	0	= Standard
A = Return and Supply Air Firestat	A = Low Limit Controls
B = Return Air Smoke Detector	B = Phase and Brown Out Protection
C = Supply Air Smoke Detector	C = Energy Recovery Wheel Defrost
D = Options B + C	D = Energy Recovery Wheel Rotation Detection
E = Options A + B	E = Compressor Power Factor Correction
F = Options A + C	F = Options A + B
G = Options A + B + C	G = Options A + C
H = Remote Smoke Detector Terminals	H = Options A + D
J = Options A + H	J = Options A + E
K = Options B + H	K = Options B + C
L = Options C + H	L = Options B + D
M = Options D + H	M = Options B + E
N = Options A + B + H	N = Options C + D
P = Options A + C + H	P = Options C + E
Q = Options A + B + C + H	Q = Options D + E
	R = Options A + B + C
	S = Options A + B + D
	T = Options A + B + E
	U = Options A + C + D
	V = Options A + C + E
	W = Options A + D + E
	Y = Options B + C + D
	Z = Options B + C + E
	1	= Options B + D + E
	2	= Options C + D + E
	3	= Options A + B + C + D
	4	= Options A + B + C + E
	5	= Options A + B + D + E
	6	= Options A + C + D + E
	7	= Options B + C + D + E
	8	= Options A + B + C + D + E

RN Series Feature String Nomenclature

Feature 13: SPECIAL CONTROLS

0 = Terminal Block for Thermostat Control

D = VAV Unit Controller - VAV Cool + CV Heat E = Constant Volume Unit Controller - CV Cool + CV Heat

F = Makeup Air Unit Controller - CV Cool + CV Heat

H = Field Installed DDC Controls by Others

J = Factory Installed DDC Controls Furnished by Others

K = Factory Installed DDC Controls Furnished by Others w/ Isolation relays

L = Terminal Block for Thermostat Control with Isolation Relays

U = Digital Precise Air Controller, D-PAC V = Precise Air Controller, PAC

W = Terminal Block for Variable Capacity Compressor Thermostat

Y = VAV Single Zone Heat Pump Unit Controller - VAV Cool + VAV Heat

Z = Constant Volume Heat Pump Unit Controller - CV Cool + CV Heat

1 = Makeup Air Heat Pump Unit Controller - CV Cool + CV Heat

2 = VAV Single Zone Unit Controller VAV Cool + CV Heat

3 = VAV Single Zone Unit Controller VAV Cool + VAV Heat

4 = Field Installed DDC Controls by Others

5 = Field Installed DDC Controls Furnished by Others with Isolation Relays

6 = Factory Installed DDC Controls Furnished by Others with Isolation Relays (SPA)

Feature 14: PREHEAT

14A: PREHEAT CONFIGURATION

0 = Standard - None

A = Steam Distributing Preheat Coil - 1 Row B = Steam Distributing Preheat Coil - 2 Row C = Hot Water Preheat Coil - 1 Row

D = Hot Water Preheat Coil - 2 Row E = Modulating Electric Preheat

14B: PREHEAT SIZING

0 = Standard - None

A = Single Serpentine 8 fpi B = Half Serpentine 8 fpi

C = Single Serpentine 10 fpi D = Half Serpentine 10 fpi E = Single Serpentine 12 fpi F = Half Serpentine 12 fpi

G = 10 kW (7.5 kW @ 208V) H = 15 kW (11.3 kW @ 208V) J = 20kW (15 kW @ 208V)

K = 30kW (22.5 kW @ 208V) L = 40kW (30 kW @ 208V) M = 50kW (37.6 kW @ 208V) N = 60kW (45.1 kW @ 208V) P = 70kW (52.6 kW @ 208V) Q = 80kW (60.1 kW @ 208V) R = 90kW (67.6 kW @ 208V) S = 100kW (75.1 kW @ 208V) T = 110kW (82.6 kW @ 208V)

U = 120kW (90.1 kW @ 208V)

Feature 15: Glycol Percentage

0 = Standard

A = 20% Propylene Glycol

B = 40% Propylene Glycol

C = Field Adjustable for Glycol %

Feature 16: INTERIOR CABINET

OPTIONS

0 = Standard

B = Service Lights

Feature 17: EXTERIOR CABINET

OPTIONS

0 = Standard

A = Base Insulation

B = Burglar Bars

C = Condenser Coil Guards

D = Options A + B

E = Options A + C

F = Options B + C

G = Options A + B + C

RN Series Feature String Nomenclature

Feature 18: CUSTOMER CODE

0 = Standard

Feature 19: CODE OPTIONS

0 = Standard - ETL U.S.A. Listing B = Chicago - Cool + Gas

C = Chicago - Cool + Electric Heat D = Chicago - Cool Only

E = Chicago - Gas Only

F = Chicago - Electric Heat Only

G = Chicago - No Cool + No Heat

H = ETL U.S.A. + Canada Listing K = California OSHPD Certification

L = Shake Table Cert. (ASCE 7-05/ICC-ES AC 156)

M= Seismic Construction (Non-Certified)

N= California OSHPD Certification + Chicago

P= Shake Table Cert. (ASCE 7-05/ICC-ES AC 156) + Chicago

Q= Seismic Construction (Non-Certified) + Chicago

Feature 20: CRATING

0 = Standard

A = Export Crating

B = Export Crating - No Condenser Section

Feature 21: WATER-COOLED

CONDENSER

0 = Standard - None

A = Balancing Valves

B = Water Flow Switch

C= Motorized Shut-off Valve

D= Head Pressure Control

E= Options A + B

F= Options A + C

G= Options A + D

H= Options B + C

J = Options B + D

L = Options A + B + C

M = Options A + B + D

R = SMO 254 Brazed Plate Heat Exchanger S = Options A + R

T = Options B + R

U = Options C + R

V = Options D + R

W = Options A + B + R

Y = Options A + C + R

Z = Options A + D + R

1 = Options B + C + R

2 = Options B + D + R

3 = Options C + D + R

4 = Options A + B + C + R

5 = Options A + B + D + R

Feature 22: CONTROL VENDORS

0 = None

A = WattMaster Orion Controls System

B = JENEsys Control System with Web UI

C = WattMaster Orion Controls System with Specials E = Remote Mounted AAON Mini Controller

F = JENEsys Control System with Web UI + Fox G = JENEsys Control System with Web UI + Lon H = JENEsys Control w/ Web UI + BACnet MSTP J = JENEsys Control w/ Web UI + BACnet IP

K = JENEsys Control w/ Web UI + Modbus RTU L = JENEsys Control w/ Web UI + Modbus TCP

RN Series Feature String Nomenclature

Feature 23: TYPE

B = Standard - AAON Gray Paint

U = Special Pricing Authorization + Special Paint

X = Special Pricing Authorization + AAON Gray

Paint

1 = Standard Paint + 2 Year Parts Only Warranty

4 = Standard Paint + 5 Year Parts Only Warranty

9 = Standard Paint + 10 Year Parts Only Warranty

General Information

RN Series packaged rooftop units, heat pumps and outdoor air handling units have been designed for outdoor installation only. Units are assembled, wired, charged and run tested at the factory.

Startup and service must be performed by a Factory Trained Service Technician.

WARNING

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.

CAUTION

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.

Certification of Gas Heat Models

a.AAON gas heat exchangers have successfully completed 10,000 burner operation cycles and corrosion resistance as specified per test standard ANSI 21.47. All gas heat exchangers used in AAON appliances are certified for use downstream of evaporator or cooling coils.

b.Certified as a Category III forced air furnace with or without cooling.

c.Certified for outdoor installation only.

d.Certified for installation on a combustible roof with a minimum of 12” high curb.

Certification of Steam or Hot Water Heat Models

a.Certified as a forced air heating system with or without cooling.

b.Certified for outdoor installation only.

c.Certified for installation on a combustible roof with a minimum of 12” high curb.

Certification of Electric Heat Models

a.Certified as an electric warm air furnace with or without cooling.

b.Certified for outdoor installation only.

c.Certified for installation on a combustible roof with a minimum of 12” high curb.

Certification of Cooling Models

a.Certified as a commercial central air conditioner with or without electrically operated compressors.

b.Certified for outdoor installation only.

c.Certified for installation on a combustible roof with a minimum of 12” high curb.

d.Certified with refrigerant R-410A coils or with chilled water cooling coils.

Codes and Ordinances

RN 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 RN Series units must conform to the ICC standards of the International Mechanical Code, the International Building Code, and local building, plumbing and waste water codes. In the absence of local codes installation must conform to the current (United States) National Fuel Gas Code ANSI-Z223.1/NFPA 54 or the current (Canada) National Fuel & Propane Installation Code CSA B149.1 or B149.2, and Mechanical Refrigeration Code CSA B52. 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.

CAUTION

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.

WARNING

Coils and sheet metal surfaces present sharp edges and care must be taken when working with equipment.

Receiving Unit

When received, the unit should be checked for damage that might have occurred in transit. If damage is found it should be noted on the carrier’s freight bill. A request for inspection by carrier’s agent should be made in writing at once. Nameplate should be checked to ensure the correct model sizes and voltages have been received to match the job requirements.

If repairs must be made to damaged goods, then the factory should be notified before any repair action is taken in order to protect the warranty. Certain equipment alteration, repair, and manipulation of equipment without the manufacturer’s consent may void the product warranty. Contact the AAON Warranty Department for assistance with handling damaged goods, repairs, and freight claims: (918) 583-2266.

Note: Upon receipt check shipment for items that ship loose such as filters and remote sensors. Consult order and shipment documentation to identify potential looseshipped 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.

WARNING

Failure to observe the following instructions will result in premature failure of your system and possible voiding of the warranty.

Figure 1 - Lockable Handle

The warranty card must be completed in full and returned to AAON not more than 3 months after unit is delivered.

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.

Packaged Direct Expansion (DX) Units

WARNING

COMPRESSOR CYCLING

5 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 5 minutes.

5 MINUTE MINIMUM ON TIME To maintain the proper oil level compressors must cycle on for a minimum of 5 minutes.

The cycle rate must not exceed 6 starts per hour.

All DX refrigeration systems are factory assembled, leak tested, charged with refrigerant, and run tested.

All refrigerant systems include an evaporator, condenser, liquid line filter driers, thermal expansion valves (TXV) and scroll compressors. Compressors are equipped with a positive pressure forced lubrication system.

CAUTION

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.

Never cut off the main power supply to the unit, except for servicing, emergency, or complete shutdown of the unit. When power is cut off from the unit crankcase heaters cannot prevent refrigerant migration into the compressors. This means the compressor will 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 servicing, emergency or complete shutdown of the unit.

During the cooling season, if the air flow is reduced due to dirty air filters or any other reason, the cooling coils can get too cold which will cause excessive liquid to return to the compressor. As the liquid concentration builds up, oil is washed out of the compressor, leaving it starved for lubrication.

The compressor life will be seriously shorted by reduced lubrication and the pumping of excessive amounts of liquid oil and refrigerant.

CAUTION

Polyolester (POE) and Polyvinylether (PVE) oils are two types of lubricants used in hydrofluorocarbon (HFC) refrigeration systems. Refer to the compressor label for the proper compressor lubricant type.

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.

Note: Multiple Units with Multiple Thermostats

When several heating and cooling units are used to condition a space all unit thermostat switches must be set in either heating mode, cooling mode or off. Do not leave part of the units switched to the opposite mode. Cooling only units should be switched off at the thermostat during the heating season.

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.

If unit has not been selected as a 100% outside air unit (makeup air unit) the return air duct must be sealed to the unit and the return air temperature must be maintained between 55 F and 80 F.

Table 1 - Electric and Gas Heating Capacities

			Gas Heat					Electric Heat
Model Option B2			Input Capacity	Output Capacity				Capacity
Model Option B2			MBH		MBH		kW (208V)			kW (230V,
										kW (230V,
										460V, 575V)
										460V, 575V)
1	= Heat 1	60.0			48.0	7.5			10
2	= Heat 2	90.0			72.0	15.0			20
3	= Heat 3	100.0			80.0	22.5			30
4	= Heat 4	270.0			218.7	30.0			40
5	= Heat 5	140.0			112.0	37.5			50
6	= Heat 6	390.0			315.9	45.1			60
7	= Heat 7	160.0			128.0	60.1			80
8	= Heat 8	405.0			328.1	75.1			100
9	= Heat 9					90.1			120
A = Heat A						120.1			160
B = Heat B						150.2			200
B = Heat B						150.2			200
C = Heat C		540.0			432.0	180.2			240
D = Heat D		810.0			648.0	210.3			280
E = Heat E		1080.0			864.0	240.3			320
F = Heat F		195.0			156.0
G = Heat G		292.5			234.0
K = Heat K		150.0			120.0
L = Heat L		210.0			168.0
M = Heat M		800.0			640.0
N = Heat N		1600.0			1280.0
P = Heat P		2400.0			1920.0

Wiring Diagrams

Unit specific wiring diagrams are laminated and affixed inside the controls compartment door.

Condensate Drain Pan

Unit requires drain traps to be connected to the condensate drain pan of the unit. The 6- 25 and 30 ton units include one drain pan connection and the 26 and 31-140 ton units include two drain pan connections. Condensate drain pipes or p-traps for each connection are factory supplied and shipped loose in the controls compartment for field installation.

If codes require a condensate drain line, 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.

CAUTION

Unit should not be operated without a p-trap. Failure to install a p-trap may result in overflow of condensate water.

Installation

AAON equipment has been designed for quick and easy installation.

Locating Units

The curb should be mounted first and must be located so that duct connections will be clear of structural members of the building.

Verify rooftop or foundation can support the total unit weight, including accessory weights.

WARNING

When locating gas fired units, it is recommended the unit be installed so that the flue discharge vents are located at least 120 inches away from any opening through which combustion products could enter the building.

WARNING

Distances from adjacent public walkways, adjacent buildings, operable windows and building openings, shall conform to local codes and/or the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the National Gas & Propane Code, CSA B149.1

Do not position flue opening to discharge into a fresh air intake of any other piece of equipment. Unit should also be installed so that the flow of combustion intake air is not obstructed from reaching the furnace.

Vent opening must not be blocked by snow. A minimum 12” curb must be used or the

vent outlet shall be greater than 12” off the ground/roof.

Flue gas is dangerously hot and contains containments. The user is responsible for determining if vent gases may degrade building materials.

The National Gas and Propane Installation Code, B149.1 specifies a 6 ft. horizontal vent terminal clearance to gas and electric meters and relief devices.

Local codes may supersede or further place restrictions on vent termination locations.

Table 2 - A Cabinet Unit Clearances

Location Unit Size

6-8 and 10 tons

	Front -	48”
	(Controls Side)	48”
	(Controls Side)
	Back - (Outside Air)	36”
	*Left Side	*6”
	Right Side	48”
	Top	Unobstructed

*Units with a water-cooled condenser or chilled water coil require 48” of clearance on the left side for service access. DX and no cooling air handling units with an energy recovery wheel require 24” of clearance on the left side for service access.

Table 3 - B Cabinet Unit Clearances

Location Unit Size

9 and 11-15 tons

	Front -	48”
	(Controls Side)	48”
	(Controls Side)
	Back - (Outside Air)	48”
	*Left Side	*6”
	Right Side	48”
	Top	Unobstructed

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