AAON RN Series Air Handling Units

Specifications

• Product Name: RN Series E Cabinet
• Cooling Capacity: 75-140 tons
• Type: Packaged Rooftop Units & Outdoor Air Handling Units
• Certification: UL-1995

Product Information

The RN Series E Cabinet is a high-capacity cooling system designed for commercial and industrial applications. With a cooling capacity ranging from 75 to 140 tons, this unit is suitable for large spaces that require efficient temperature control. It is a packaged rooftop unit combined with an outdoor air handling unit, providing comprehensive climate control solutions.

Installation Instructions:

1. Ensure to read and understand the installation manual thoroughly before proceeding.
2. Installation must be carried out by qualified personnel to prevent any risks of injury, death, or property damage.
3. Keep a copy of the Installation, Operation, and Maintenance (IOM) manual with the unit at all times.

Operation Guidelines:

1. Only authorized personnel should operate the unit.
2. Regularly inspect the unit for any signs of damage or wear and tear.
3. Follow the recommended maintenance schedule provided in the manual to ensure optimal performance.

Maintenance Procedures:

1. Before servicing, disconnect all electrical power to the unit to avoid electric shock hazards.
2. Label and disconnect all wires correctly when servicing controls. Reconnect wires accurately after servicing.
3. Verify proper operation of the unit after servicing and secure all doors with key-lock or nut and bolt.

Safety Precautions:

1. Do not store gasoline or other flammable materials near the unit to prevent fire hazards.
2. If you smell gas, do not try to operate the unit. Shut off the main gas supply and follow safety instructions provided.
3. Startup and service must only be performed by a Factory Trained Service Technician to ensure safe operation.

FAQs

Q: What should I do if I smell gas near the unit?

A: If you detect a gas odor, do not operate the unit. Shut off the main gas supply, avoid using electrical switches or phones, and leave the building immediately. Contact your gas supplier or the fire department for assistance.

RN Series
E Cabinet
(75-140 tons)
Packaged Rooftop Units & Outdoor Air Handling Units

Installation

, Operation, & Maintenance

UL-1995
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 must be kept with the unit.

WARNING
o Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance
o WHAT 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.
o Startup and service must be performed by a Factory Trained Service Technician.
5

AAON® RN Series E Cabinet Features and Options Introduction

Energy Efficiency · Direct Drive Backward Curved Plenum
Supply Fans · Variable Speed Scroll Compressors · Airside Economizers · Factory Installed AAONAIRE® Energy
Recovery Wheels · Double Wall Rigid Polyurethane Foam
Panel Construction, R-13 Insulation · Modulating Natural Gas Heaters · Modulating/SCR Electric Heaters · Premium Efficiency Motors · Variable Speed Supply/Return/Exhaust
Fans
Indoor Air Quality · 100% Outside Air · Outside Airflow Monitoring · Constant Volume Outside Air Control · Economizer CO2 Override · High Efficiency Filtration · UV Lights for Single Pass 90% Air
Disinfection · Double Wall Rigid Polyurethane Foam
Panel Construction, R-13 Insulation · Interior Corrosion Protection
Humidity Control · High Capacity Cooling Coils · Variable Speed Compressors · Factory Installed AAONAIRE Total
Energy Recovery Wheels · Mixed/Return Air Bypass · Modulating Hot Gas Reheat
Safety · Burglar Bars · Freeze Stats · Hot Water/Steam Preheat Coils · Electric Preheat · Phase and Brown Out Protection · Supply/Return Smoke Detectors

Safety Continued · Supply/Return Firestats
Installation and Maintenance · Clogged Filter Switch · Color Coded Wiring Diagram · Compressors in Isolated Compartment · Compressor Isolation Valves · Convenience Outlet · Direct Drive Supply Fans · Hinged Access Doors with Lockable
Handles · Magnehelic Gauge · Service Lights · Sight Glass
System Integration · Chilled Water Cooling Coils · Third-party Controls · Electric/Natural Gas/LP Heating · Hot Water/Steam Heating Coil · Non- Compressorized DX Coils
Environmentally Friendly · Airside Economizers · Factory Installed AAONAIRE Energy
Recovery Wheels · Mixed/Return Air Bypass · R-410A Refrigerant
Extended Life · 2, 5, or 10 Year Parts Warranty Options · 5 Year Compressor Warranty · 15 Year Aluminized Steel Heat
Exchanger Warranty · 25 Year Stainless Steel Heat Exchanger
Warranty · Condenser Coil Guards · Interior Corrosion Protection · Coil Polymer E-Coating – 5 Year Coating
Warranty · Stainless Steel Coil Casing · Stainless Steel Drain Pans

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.

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.

7

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
CARBON MONOXIDE POISONING HAZARD
Failure to follow instructions could result in severe personal injury or death due to carbon-monoxide poisoning, if combustion products infiltrate into the building.
Check that all openings in the outside wall around the vent (and air intake) pipe(s) are sealed to prevent infiltration of combustion products into the building.
Check that furnance vent (and air intake) terminal(s) are not obstructed in any way during all seasons.

WARNING
During installation, testing, servicing, and troubleshooting of the equipment it may be necessary to work with live electrical components. Only a qualified licensed electrician or individual properly trained in handling live electrical components shall perform these tasks.
Standard NFPA-70E, an OSHA regulation requiring an Arc Flash Boundary to be field established and marked for identification of where appropriate Personal Protective Equipment (PPE) be worn, must be followed.
CAUTION
Unit power supply wire must be only copper or aluminum.
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.

8

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 61 cm (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

must be checked for proper operation.

Alterations must 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.

9

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 must 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.
CAUTION
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.
10

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.
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 around this appliance.

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 refrigerantto-water heat exchanger. Care must 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
3 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 3 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 7 starts per hour.

WARNING

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
Do not use torch or other potential ignition source to detect refrigerant leaks. Use only electronic detector suitable for the refrigerant, or bubble method with chlorine free detergent.

WARNING
Only auxiliary devices approved by manufacturer or declared suitable with the refrigerant may be installed in ductwork.

11

WARNING
Connected ductwork must be free of potential ignition sources, such as hot surfaces above 700 ºC (1292 ºF) or electrical devices prone to arcing or sparking. Potential ignition sources within the ductwork may only be allowed if the minimum air velocity across these components is above 1 m/s (200 ft/min) during any point which the component can function.
CAUTION
Disconnect power to the unit before servicing UV-C lamps
CAUTION
Doors and panels with access to UVC lamps, with possible spectral irradiance exceeding 1.7 W/cm2 are provided with an interlock switch. Do not over-ride.

WARNING
Do not operate UV-C lamps outside of the unit.
WARNING
Units containing UV-C Germicidal lamps should not be operated with damage to the cabinet of the unit. UVC radiation may, even in small doses, cause harm to the eyes and skin.

12

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. 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 must 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.

13

9 D

3 7

RN Series E Cabinet Feature String Nomenclature

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VLT

MNREV

SERIES

GEN MJREV SIZ E

8

7

2

1

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

MODEL OPTIONS
SERIES AND GENERATION RN
MAJOR REVISION A
UNIT SIZE 075 = 75 ton Capacity 090 = 90 ton Capacity 105 = 105 ton Capacity 120 = 120 ton Capacity 130 = 130 ton Capacity 140 = 140 ton Capacity
SERIES E = 75-140 ton units
MINOR REVISION 0
VOLTAGE 2 = 230V/3/60Hz 3 = 460V/3/60Hz 4 = 575V/3/60Hz 8 = 208V/3/60Hz
Model Option A: COOLING/HEAT PUMP
A1: COMPRESSOR STYLE 0 = No Compressor C = R-410A Variable Speed Scroll Compressor H = R-454B Variable Speed Scroll Compressor
A2: CONDENSER STYLE 0 = No Condenser A = Microchannel Air-Cooled Condenser N = DX Air Handling Unit

A3: INdOOR COIL CONFIGURATION 0 = No Cooling Coil A = 4 Row Standard Evaporator B = 6 Row Evaporator E = 4 Row Chilled Water Coil F = 6 Row Chilled Water Coil
A4: COOLING HEAT EXCHANGER CONSTRUCTION 0 = Standard A = Polymer E-Coated Cooling Coil B = Stainless Steel Cooling Coil Casing D = Stainless Steel Cooling Coil Casing + Polymer
E-Coated Cooling Coil E = Polymer E-Coated Cond. Coil J = Polymer E-Coated Evap. And Cond. Coil T = Stainless Steel Cooling Coil Casing + Polymer E-
Coated Evap. And Cond. Coil
A5: COOLING STAGING 0 = No Cooling A = Full Face Variable Capacity + Tandem On/Off
Refrigeration Systems F = Single Serpentine 8 FPI G = Half Serpentine 8 FPI H = Single Serpentine 10 FPI J = Half Serpentine 10 FPI K = Single Serpentine 12 FPI L = Half Serpentine 12 FPI N = DX Air Handling Unit with 2 Refrigeration Circuits

14

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

Model Option B: HEATING
B1: HEAT TYPE 0 = No Heat A = Electric Heat C = Natural Gas F = LP Gas J = Hot Water Coil L = Steam Distributing Coil
B2: HEAT CONSTRUCTION 0 = Standard B = Stainless Steel Heat Exchanger D = High Altitude Stainless Steel Heat Exchanger G = Polymer E-Coated Heating Coil
B3: HEAT DESIGNATION 0 = No Heat 1 = Heat 1 2 = Heat 2 3 = Heat 3 4 = Heat 4 5 = Heat 5 6 = Heat 6 7 = Heat 7 A = 1 Row E = 2 Row
B4: HEAT STAGING 0 = No Heat B = 2 Stage C = 3 Stage D = 4 Stage E = 5 Stage F = 6 Stage K = Modulating Gas Heat Temp Control L = High Turndown Modulating Gas Heat ­
Temperature Control M = Modulating SCR with Temperature Control N = Modulating SCR with External 0-10 VDC P = Single Serpentine 8 FPI Q = Half Serpentine 8 FPI

B4: HEAT STAGING (Continued) R = Single Serpentine 10 FPI S = Half Serpentine 10 FPI T = Single Serpentine 12 FPI U = Half Serpentine 12 FPI
B5: HEAT PUMP AUX HEATING 0 = No Heat Pump
1: UNIT ORIENTATION
A = Draw Through Compact Supply Fan, End Compressor Compartment, Both Side Access
D = Draw Through Compact Supply Fan, NonCompressorized, End Control Panel, Both Side Access
2: SUPPLY & RETURN LOCATIONS
0 = Bottom Supply–Bottom Return A = Bottom Supply–No Return B = Bottom Supply–Left Return C = Bottom Supply–Right Return D = Bottom Supply–End Return F = Left Supply–Bottom Return G = Left Supply–Left Return H = Left Supply–Right Return J = Left Supply–End Return L = Right Supply–Bottom Return M = Right Supply–Left Return N = Right Supply–Right Return P = Right Supply–End Return R = Top Supply–Bottom Return S = Top Supply–Left Return T = Top Supply–Right Return U = Top Supply–End Return
Feature 3: SUPPLY FAN OPTIONS
3A: SUPPLY FAN QUANTITY 0 = 1 Fan A = 2 Fans

15

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

3B: SUPPLY FAN CONFIGURATION 0 = No VFDs + Full Width Fan A = 1 Fan per VFD + Full Width Fan B = 2 Fans per VFD + Full Width Fan E = No VFDs + Narrow Width Fan F = 1 Fan per VFD + Narrow Width Fan G = 2 Fans per VFD + Narrow Width Fan K = Option 0 + Inlet Backdraft Dampers L = Option A + Inlet Backdraft Dampers M = Option B + Inlet Backdraft Dampers Q = Option E + Inlet Backdraft Dampers R = Option F + Inlet Backdraft Dampers S = Option G + Inlet Backdraft Dampers
3C: SUPPLY FAN SIZE 0 = 13.5″ Direct Drive Backward Curved Plenum
Aluminum F = 24″ Direct Drive Backward Curved Plenum
Aluminum G = 27″ Direct Drive Backward Curved Plenum
Aluminum H = 30″ Direct Drive Backward Curved Plenum
Aluminum J = 30″ Direct Drive Backward Curved Plenum Steel K = 33″ Direct Drive Backward Curved Plenum Steel L = 36.5″ Direct Drive Backward Curved Plenum
Aluminum M = 42.5″ Direct Drive Backward Curved Plenum
Aluminum
3D: SUPPLY FAN MOTOR TYPE 0 = High Efficiency Open Motor
(1200 nominal rpm) A = High Efficiency Open Motor
(1800 nominal rpm) B = High Efficiency Open Motor
(3600 nominal rpm) C = Perm Magnet AC Open Motor (1200 nominal
rpm) D = Perm Magnet AC Open Motor (1800 nominal
rpm) E = Perm Magnet AC Open Motor (3600 nominal
rpm)
16

3D: SUPPLY FAN MOTOR TYPE (continued) F = ECM Motor (1200 nominal rpm) G = ECM Motor (1800 nominal rpm) H = ECM Motor (3600 nominal rpm) J = ECM Motor Packaged with Fan K = High Efficiency Totally Enclosed Motor
(1200 nominal rpm) L = High Efficiency Totally Enclosed Motor
(1800 nominal rpm) M = High Efficiency Totally Enclosed Motor
(3600 nominal rpm) N = Perm Magnet AC Totally Enclosed Motor (1200
nominal rpm) P = Perm Magnet AC Totally Enclosed Motor (1800
nominal rpm) Q = Perm Magnet AC Totally Enclosed Motor (3600
nominal rpm)
3E: SUPPLY FAN MOTOR SIZE D = 1 hp F = 2 hp G = 3 hp H = 5 hp J = 7.5 hp K = 10 hp L = 15 hp M = 20 hp N = 25 hp P = 30 hp Q = 40 hp R = 50 hp
Feature 4: RETURN/OUTSIDE AIR OPTIONS
4A: OUTSIDE AIR SECTION 0 = 100% Outside Air A = 100% Outside Air with Motorized Dampers B = Manual Outside Air + Return Air Opening C = Motorized Outside Air Dampers + Return Air
Opening D = 100% Return Air E = Economizer G = Econ + Power Exhaust (Plenum Fans)

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

4A: OUTSIDE AIR SECTION (continued) J = Econ + Power Return (Plenum Fans) Q = Econ + Energy Recovery + Bypass Damper
4B: ENERGY RECOVERY TYPE 0 = No Energy Recovery A = Polymer Energy Recovery Wheel B = Polymer Energy Recovery Wheel + 1% Purge C = Aluminum Energy Recovery Wheel D = Aluminum Energy Recovery Wheel + 1% Purge
4C: ENERGY RECOVERY SIZE 0 = No Energy Recovery A = Low CFM Enthalpy B = High CFM Enthalpy E = Low CFM Sensible F = High CFM Sensible J = Low CFM Enthalpy + Exhaust Filters K = High CFM Enthalpy + Exhaust Filters N = Low CFM Sensible + Exhaust Filters P = High CFM Sensible + Exhaust Filters
Feature 5: RETURN FAN OPTIONS
5A: RETURN FAN QUANTITY 0 = No Return Fan A = 1 Fan B = 2 Fans
5B: RETURN FAN CONFIGURATION 0 = No Return Fan A = No VFDs + Full Width Fan B = 1 Fan per VFD + Full Width Fan C = 2 Fans per VFD + Full Width Fan F = No VFDs + Narrow Width Fan G = 1 Fan per VFD + Narrow Width Fan H = 2 Fans per VFD + Narrow Width Fan L = Option A + Inlet Backdraft Dampers M = Option B + Inlet Backdraft Dampers N = Option C + Inlet Backdraft Dampers R = Option F + Inlet Backdraft Dampers S = Option G + Inlet Backdraft Dampers T = Option H + Inlet Backdraft Dampers

5C: RETURN FAN SIZE 0 = No Return Fan M = 24″ Direct Drive Backward Curved Plenum
Aluminum N = 27″ Direct Drive Backward Curved Plenum
Aluminum P = 30″ Direct Drive Backward Curved Plenum
Aluminum Q = 30″ Direct Drive Backward Curved Plenum Steel R = 33″ Direct Drive Backward Curved Plenum Steel S = 36.5″ Direct Drive Backward Curved Plenum
Aluminum
5D: RETURN FAN MOTOR TYPE 0 = No Return Fan A = High Efficiency Open Motor
(1170 nominal rpm) B = High Efficiency Open Motor
(1760 nominal rpm) L = High Efficiency Totally Enclosed Motor
(1170 nominal rpm) M = High Efficiency Totally Enclosed Motor
(1760 nominal rpm) A = High Efficiency Open Motor
(1200 nominal rpm) B = High Efficiency Open Motor
(1800 nominal rpm) C = High Efficiency Open Motor
(3600 nominal rpm) D = Perm Magnet AC Open Motor (1200 nominal
rpm) E = Perm Magnet AC Open Motor (1800 nominal
rpm) F = Perm Magnet AC Open Motor (3600 nominal
rpm) G = ECM Motor (1200 nominal rpm) H = ECM Motor (1800 nominal rpm) J = ECM Motor (3600 nominal rpm) K = ECM Motor Packaged with Fan L = High Efficiency Totally Enclosed Motor
(1200 nominal rpm) M = High Efficiency Totally Enclosed Motor
(1800 nominal rpm)
17

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

5D: RETURN FAN MOTOR TYPE (continued) N = High Efficiency Totally Enclosed Motor
(3600 nominal rpm) P = Perm Magnet AC Totally Enclosed Motor (1200
nominal rpm) Q = Perm Magnet AC Totally Enclosed Motor (1800
nominal rpm) R = Perm Magnet AC Totally Enclosed Motor (3600
nominal rpm)
5E: RETURN MOTOR SIZE 0 = No Return Fan E = 1 hp F = 1.5 hp G = 2 ph H = 3 hp J = 5 hp K = 7.5 hp L = 10 hp M = 15 hp N = 20 hp P = 25 hp Q = 30 hp R = 40 hp S = 50 hp
Feature 6: EXHAUST FAN OPTIONS
6A: EXHAUST FAN QUANTITY 0 = No Exhaust Fan A = 1 Fan B = 2 Fans
6B: EXHAUST FAN CONFIGURATION 0 = No Exhaust Fan A = No VFDs + Full Width Fan B = 1 Fan per VFD + Full Width Fan C = 2 Fans per VFD + Full Width Fan F = No VFDs + Narrow Width Fan G = 1 Fan per VFD + Narrow Width Fan H = 2 Fans per VFD + Narrow Width Fan L = Option A + Inlet Backdraft Dampers M = Option B + Inlet Backdraft Dampers N = Option C + Inlet Backdraft Dampers
18

6B: EXHAUST FAN CONFIGURATION (cont) R = Option F + Inlet Backdraft Dampers S = Option G + Inlet Backdraft Dampers T = Option H + Inlet Backdraft Dampers
6C: EXHAUST FAN SIZE 0 = No Exhaust Fan M = 24″ Direct Drive Backward Curved Plenum
Aluminum N = 27″ Direct Drive Backward Curved Plenum
Aluminum P = 30″ Direct Drive Backward Curved Plenum
Aluminum Q = 30″ Direct Drive Backward Curved Plenum Steel R = 33″ Direct Drive Backward Curved Plenum Steel S = 36.5″ Direct Drive Backward Curved Plenum
Aluminum T = 42.5″ Direct Drive Backward Curved Plenum
Aluminum 6D: EXHAUST FAN MOTOR TYPE 0 = No Exhaust Fan A = High Efficiency Open Motor
(1200 nominal rpm) B = High Efficiency Open Motor
(1800 nominal rpm) C = High Efficiency Open Motor
(3600 nominal rpm) D = Perm Magnet AC Open Motor (1200 nominal
rpm) E = Perm Magnet AC Open Motor (1800 nominal
rpm) F = Perm Magnet AC Open Motor (3600 nominal
rpm) G = ECM Motor (1200 nominal rpm) H = ECM Motor (1800 nominal rpm) J = ECM Motor (3600 nominal rpm) K = ECM Motor Packaged with Fan L = High Efficiency Totally Enclosed Motor
(1200 nominal rpm) M = High Efficiency Totally Enclosed Motor
(1800 nominal rpm) N = High Efficiency Totally Enclosed Motor
(3600 nominal rpm

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

6D: EXHAUST FAN MOTOR TYPE (continued) P = Perm Magnet AC Totally Enclosed Motor (1200
nominal rpm) Q = Perm Magnet AC Totally Enclosed Motor (1800
nominal rpm) R = Perm Magnet AC Totally Enclosed Motor (3600
nominal rpm)
6E: EXHAUST MOTOR SIZE 0 = No Return Fan E = 1 hp G = 2 ph H = 3 hp J = 5 hp K = 7.5 hp L = 10 hp M = 15 hp N = 20 hp P = 25 hp Q = 30 hp R = 40 hp S = 50 hp
7: O/A CONTROL
0 = Standard (No Actuator) C = Fully Modulating Actuator – Sensible Limit D = Fully Modulating Actuator – Enthalpy Limit E = DDC Actuator P = Option C + CO2 Override Q = Option D + CO2 Override R = Option E + CO2 Override U = 2 Position Actuator V = Fault Detection and Diagnostics Controller
(FDD) Sensible Limit W = FDD Enthalpy Limit Y = Option V + CO2 Override Z = Option W + CO2 Override
8: RETURN & EXHAUST OPTIONS
0 = No Return Opening A = Standard Return Opening without EA Dampers C = Standard Return Opening + Barometric Relief
Dampers

8: RETURN & EXHAUST OPTIONS (continued)
E = Standard Return Opening + Motorized EA Dampers
Feature 9: FILTER OPTIONS
9A: UNIT FILTER TYPE 0 = 2″ Pleated MERV 8 A = 4″ Pleated MERV 8 B = 2″ Pleated MERV 8 + 4″ Pleated MERV 11 C = 2″ Pleated MERV 8 + 4″ Pleated MERV 13 D = 2″ Pleated MERV 8 + 4″ Pleated MERV 14
9B: UNIT FILTER BOX SIZE/LOCATION 0 = Standard Filters in Standard Position B = High Eff Filters in Standard Position
9C: FINAL FILTER TYPE 0 = No Final Filters A = 12″ Cartridge MERV 13 D = 12″ Cartridge MERV 14 U = 4″ Pleated MERV 13 Y = 4″ Pleated MERV 14
9D: FILTER OPTIONS 0 = None A = Clogged Filter Switch – Unit Filters E = Magnehelic Gauge – Unit Filters J = CFS + Magnehelic Gauge – Unit Filters
Feature 10: REFRIGERATION CONTROL
10A: REFRIGERATION CONTROL 0 = None E = Freeze Stats (each circuit)
10B: BLANK 0 = None
19

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

Feature 11: REFRIGERATION OPTIONS
11A: REFRIGERATION OPTIONS 0 = None D = Hot Gas Bypass Non-Variable Compressor
Circuits (HGBNV) M = HGBNV + Parallel Modulating Hot Gas Reheat
-Lag Circuit W = HGBNV + Parallel Modulating Hot Gas Reheat
-Lag Circuit – Polymer E-Coated
11B: BLANK 0 = None
12: REFRIGERATION ACCESSORIES 0 = None B = Compressor Isolation Valves C = Sight Glass + Option B F = Option B +Variable Circuits -20°F Low Ambient G = Sight Glass + Option F K = Option B + Tandem Circuit -20°F Low Ambient L = Sight Glass + Option K P = Option B + All Circuits -20°F Low Ambient Q = Sight Glass + Option P
Feature 13: POWER OPTIONS
13A: UNIT DISCONNECT TYPE 0 = Single Point Power – Standard Power Block A = Single Point Power – Non-fused Disconnect
Power Switch B = Single Point Power – Circuit Breaker C = Dual Point Power – Standard Power Block ­
Method #1 D = Dual Point Power – Non-fused Disconnect Power
Switch ­ Method #1 E = Dual Point Power ­ Circuit Breaker ­ Method #1 F = Dual Point Power – Standard Power Block ­
Method #2 G = Dual Point Power – Non-fused Disconnect Power
Switch ­ Method #2 H = Dual Point Power ­ Circuit Breaker ­ Method #2 J = Dual Point Power – Standard Power Block ­
Method #3

13A: UNIT DISCONNECT TYPE (continued) K = Dual Point Power – Non-fused Disconnect Power
Switch ­ Method #3 L = Dual Point Power ­ Circuit Breaker ­ Method #3 M = Dual Point Power – Standard Power Block ­
Method #4 N = Dual Point Power – Non-fused Disconnect Power
Switch ­ Method #4 P = Dual Point Power ­ Circuit Breaker ­ Method #4
13B: DISCONNECT 1 SIZE 0 = Power Block A = 15 amps B = 20 amps C = 25 amps D = 30 amps E = 35 amps F = 40 amps G = 45 amps H = 50 amps J = 60 amps K = 70 amps L = 80 amps M = 90 amps N = 100 amps P = 110 amps Q = 125 amps R = 150 amps S = 175 amps T = 200 amps U = 225 amps V = 250 amps W = 300 amps Y = 350 amps Z = 400 amps 1 = 450 amps 2 = 500 amps 3 = 600 amps 4 = 700 amps 5 = 800 amps 6 = 1000 amps 7 = 1200 amps

20

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

13C: Disconnect 2 Size 0 = None A = 15 amps B = 20 amps C = 25 amps D = 30 amps E = 35 amps F = 40 amps G = 45 amps H = 50 amps J = 60 amps K = 70 amps L = 80 amps M = 90 amps N = 100 amps P = 110 amps Q = 125 amps R = 150 amps S = 175 amps T = 200 amps U = 225 amps V = 250 amps W = 300 amps Y = 350 amps Z = 400 amps 1 = 450 amps 2 = 500 amps 3 = 600 amps 4 = 700 amps 5 = 800 amps 6 = 1000 amps 7 = 1200 amps
14: SAFETY OPTIONS
0 = None A = RA & SA Firestat B = RA Smoke Detector C = SA Smoke Detector D = High Supply Air Static Pressure Switch E = Remote Safety Shutdown Terminals F = Option A + B G = Option A + C H = Option A + D

14: SAFETY OPTIONS (continued)
J = Option A + E K = Option B + C L = Option B + D M = Option B + E N = Option C + D P = Option C + E Q = Option D + E R = Option A + B + C S = Option A + B

• D T = Option A + B + E U = Option A + C + D V = Option A + C + E W = Option A + D + E Y = Option B + C + D Z = Option B + C + E 1 = Option B + D + E 2 = Option C + D + E 3 = Option A + B + C + D 4 = Option A + B + C + E 5 = Option A + B + D + E 6 = Option A + C + D + E 7 = Option B + C + D + E 8 = Option A + B + C + D + E
  15: ACCESSORIES
  0 = None A = Low Limit Control B = Phase & Brown Out Protection C = Air Disinfection UV Lights E = Compressor Sound Blankets F = Option A + B G = Option A + C J = Option A + E K = Option B + C M = Option B + E P = Option C + E R = Option A + B + C T = Option A + B + E V = Option A + C + E Z = Option B
• C + E 4 = Option A + B + C + E
  21

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0 B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

Feature 16:

UNIT CONTROLS

16A: CONTROL SEQUENCE 0 = Standard Terminal Block for Thermostat A = Terminal Block for Thermostat + Isolation
Relays B = Single Zone VAV Unit Controller – VAV Cool +
CAV Heat D = VAV Unit Controller – VAV Cool + CAV Heat E = Constant Air Volume Unit Controller – CAV
Cool + CAV Heat F = Makeup Air Unit Controller M = Field Installed DDC Controls by Others N = Field Installed DDC Controls + Isolation Relays P = Factory Installed DDC Controls by Others +
Isolation Relays
16B: CONTROL SUPPLIER 0 = None A = AAON Controls C = AAON Controls Supervisory
16C: CONTROL SUPPLIER OPTIONS 0 = None
16D: BMS CONNECTION & DIAGNOSTICS 0 = None B = BACnet MSTP K = BACnet MSTP with Diagnostics
Feature 17: PREHEAT OPTIONS
17A: PREHEAT CONFIGURATION 0 = Standard – None
17B: PREHEAT SIZING 0 = Standard – None
Feature 18: OPTION BOXES
18A: BOX LOCATION 0 = None A = 20″ Cabinet Extension After Return B = 20″ Cabinet Extension After Pre-Filter C = 20″ Cabinet Extension After Cooling

18B: BOX SIZE 0 = None A = 20″ Cabinet Extension
18C: BOX ACCESSORIES 0 = None A = 20″ Drain Pan in First Box
19: OUTSIDE AIR ACCESSORIES
0 = No Outside Air Hood – 100% Return Air A = Outside Air Hood B = Outside Air Hood with Metal Mesh Filters C = Option A + Air Flow Measuring Station Size A D = Option A + Air Flow Measuring Station Size B E = Option A + Air Flow Measuring Station Size C G = Option B + Air Flow Measuring Station Size A H = Option B + Air Flow Measuring Station Size B J = Option B + Air Flow Measuring Station Size C
20: CABINET OPTIONS
0 = None B = SA & RA Burglar Bars
21: ACCESSORIES
0 = None C = Supply Fan Air Flow Measuring D = Return Fan Air Flow Measuring N = Option C + D
22: MAINTENANCE ACCESSORIES
0 = None A = Factory Wired 115V Convenience Outlet B = Field Wired 115V Convenience Outlet C = Control Panel LED Service Lights and Marine Lights D = Remote Start/Stop Contacts E = Supply Fan Auxiliary Contacts F = Option A + C G = Option A + D H = Option A + E J = Option B + C K = Option B + D L = Option B + E

22

RN Series E Cabinet Feature String Nomenclature

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E0 0 0 0 0 – 0 0 0 0 0 0B

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

MAINTENANCE

ACCESSORIES (cont.)
M = Option C + D N = Option C + E P = Option D + E Q = Option A + C + D R = Option A + C + E S = Option A + D + E T = Option B + C + D U = Option B + C + E V = Option B + D + E W = Option C + D + E Y = Option A + C+ D + E Z = Option B + C + D + E
23: CODE OPTIONS
0 = Standard – ETL U.S.A. Listing A = Chicago Code B = ETL U.S.A. + Canada Listing
24: SHIPPING SPLITS
0 = Standard
25: AIR COOLED CONDENSER ACESSORIES
0 = Standard E = VFD Condenser Fan Head Pressure Control K = Low Sound Condenser Fan Head Pressure
Control
26: Evap-Cooled Condenser Accessories
0 = None
27: WATER – COOLED CONDENSER ACCESSORIES
0 = None (No Water Condenser)
28: ENERGY RECOVERY WHEEL ACCESSORIES
0 = None A = Energy Recovery Wheel Defrost – Start/Stop B = Energy Recovery Wheel Rotation Detection

28: ENERGY RECOVERY WHEEL ACCESSORIES (continued)
E = VFD for Heat Wheel Motor (Field Control) F = Option A + B M = Option B + E
29: VFD Options
0 = None A = Shaft Grounding kit on all SA, RA, EA motors C = BACNet VFD on all Motors G = Option A + C
30: Miscellaneous Options
0 = Standard A = High Condensate Level Switch
31: BLANK
0 = Standard A = Removable Doors (Pin Hinges)
32: BLANK
0 = Standard
33: BLANK
0 = Standard
34: BLANK
0 = Standard
35: WARRANTY
0 = Standard Warranty A = 2 Year Parts Warranty B = 5 Year Parts Warranty C = 10 Year Parts Warranty
36: CABINET MATERIAL
0 = Galvanized Cabinet – Double Wall + R-13 Foam Insulation

23

9 D

9 C

9 B

9 A

6 E

6 D

6 C

6 B

6 A

5 E

5 D

5 C

5 B

5 A

4 C

4 B

4 A

3 E

3 D

3 C

3 B

3 A

B 5

B 4

B 3

B 2

B 1

A 5

A 4

A 3

A 2

A 1

VL T

MNREV

SERIES

GE N MJREV SIZE

8

7

2

1

3 7

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

18C

18B

18A

17B

17A

16D

16C

16B

16A

1 5

1 4

13C

13B

13A

1 2

11B

11A

10B

10A

RN Series E Cabinet Feature String Nomenclature
RN A – 105 – E – 0 – 3 – C A A 0 A – 0 0 0 0 0 : A 0 – A A M 0 L – B 0 0 – 0 0 0 0 0 – 0 0 0 0 0 – 0 A – 0 0 0 0 – 0 0 – 0 0 – B – 0 0 0 – 0 0 – BA 0 B – 0 0 – 0 0 0 – A0 0 0 0 0 – E 0 0 0 0 0 – 0 0 0 0 0 0B
37: SPECIALS & PAINT
B = Premium AAON Gray Paint Exterior C = Premium AAON Gray Paint Exterior Paint +
Interior Corrosion Protection F = Premium Gray Paint Exterior Paint + Interior
Corrosion Protection + Shrink Wrap X = SPA + Premium AAON Gray Paint Exterior Y = SPA + Premium AAON Gray Paint Exterior
Paint + Interior Corrosion Protection 2 = SPA + Premium AAON Gray Paint Exterior
Paint + Interior Corrosion Protection + Shrink Wrap 4 = SPA + Special Exterior Paint Color 5 = SPA + Special Exterior Paint Color + Interior Corrosion Protection 8 = SPA + Special Exterior Paint Color + Interior Corrosion Protection + Shrink Wrap
24

General Information

RN Series E Cabinet packaged rooftop and outdoor air handling units are for outdoor installation only. A minimum of 12″ high curb is required for installation on combustible roofs.
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 must 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. The RN Series E Cabinet gas heat
exchangers have been certified as a Category III forced air furnace for use with or without cooling, located downstream of the indoor coil. b. AAON gas heat exchangers operate for a minimum of 10,000 cycles. c. Individual RN Series E Cabinet gas heat exchangers are designed for 400 MBH

input rates and can be configured for up to a 2400 MBH total gas input rating (maximum input rates vary by selected heating feature).
d. Modulating gas heat exchangers are designed for 3:1 turndown of the 320 MBH input rate available on the first stage of heating.
Certification of Steam or Hot Water Heat Models a. Certified as a forced air heating system
with or without cooling. b. RN Series E Cabinet hot water coils are
designed for operation with no more than 82.2°C (180°F) water at a 1034.2 kpa (150 psig) working pressure. c. RN Series E Cabinet steam coils are designed for 1034.2 kpa (150 psig) working pressure.
Certification of Electric Heat Models a. RN Series E Cabinet electric warm air
furnaces have been certified for use with or without cooling, located downstream of the indoor coil. b. RN Series E Cabinet electric warm air furnaces are designed with individual 40 KW electric heating elements that can be configured for up to 320 KW of electric heat (maximum output varies by selected heating features). c. Modulating electric heat exchangers are equipped with Silicon Control Rectifiers (SCR) on the first stage of heating.
Certification of Cooling Models a. RN Series E Cabinet R-410A refrigerant
systems have been certified as commercial central air conditioners with or without electrically operated compressors.

25

b. RN Series E Cabinet chilled water coils are designed for 1034.2 kpa (150 psig) working pressure.
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. Nameplate must 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, 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 Warranty Department for assistance with handling damaged goods, repairs, and freight claims: 918-382-6450.
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 must secure all doors with locks or nuts and bolts to prevent unauthorized access.

Codes and Ordinances The RN Series E Cabinet has been tested and certified by Intertek (ETL) to the following safety standards:
ANSI Z21.47-2016/CSA 2.3-2016 Gas-Fired Central Furnaces
ANSI Z83.8-2016/CSA 2.6-2016 Gas unit heaters, gas packaged heaters, gas utility heaters and gas-fired duct furnaces
UL 1995 5th Edition Safety standard for Heating and Cooling Equipment
System must be sized in accordance with practices described in the American Society of Heating, Refrigeration, and Air Conditioning Engineers Handbooks.
AAON equipment must be installed in accordance with this manual and the International Code Council (ICC) requirements.
Installation of RN Series E Cabinet units must conform to the International Code Council (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 current National Fuel Code ANSI Z223.1/NFPA 54 or the National Gas & Propane Installation Code CSA B149.1, and CSA B52 Mechanical Refrigeration Code. All appliances must be electrically grounded in accordance with local codes, or in the absence of local codes, the National Electric Code, ANSI/NFPA 70, and/or the Canadian Electrical Code CSA C22.1.

Figure 1 – Lockable Handle 26

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.
WARNING
Failure to observe the following instructions will result in premature failure of your system and possible voiding of the warranty.
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. Unit must be stored in accordance with ASHRAE 15 requirements for machine rooms.
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.

Locating Units The curb must 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. If unit is to be installed indoors, or in areas without sufficient ventilation, provide venting from all pressure relief outlets to outdoors in accordance with ASHRAE 15 requirements.
WARNING
When locating gas fired units, it is recommended the unit be installed so that the flue discharge vents are located at least 305 cm (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 must 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 30.5 cm (12″) curb must be used or the vent outlet shall be greater than 30.5 cm (12″) off the ground/roof.

27

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 1.8m (6ft). 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 1 – RN Series E Cabinet Unit

Clearances

Location

Unit Size 75-140 tons

Discharge (Controls Side)

152cm (60″)

254cm (100″)

Intake – (Outside Air) from end of the

unit

Left Side

254cm (100″)

Right Side

254cm (100″)

Top

Unobstructed

Left Side

Controls

OA

must be level in both horizontal axes to support the unit and reduce noise and vibration.
CAUTION
All roofing work must be performed by competent roofing contractors to avoid any possible leakage.
CAUTION
Where the supply or warm air duct passes through a combustible roof, a clearance of 2.54cm (1 inch) must be maintained between the outside edges of the duct and combustible material in accordance with National Fire Protection Association Standard No. 90A. Provide flashings or enclosure between structure and roof and all joints must be sealed with mastic roofing to ensure a watertight seal.
Be careful to install the provided neoprene isolator according to the following figure prior to setting the unit on the curb.

Figure 2 – RN Series E Cabinet, 75-140 tons
Setting the Curb Make openings in roof decking large enough to allow for duct penetration and workspace only. Do not make openings larger than necessary. Set the curb to coincide with the openings. Make sure the curb is level. Unit

CAUTION
Neoprene isolator for unit vibration isolation is provided in the cabinet and must be installed according to installation manual.

28

CAUTION
Incorrect lifting can cause damage to the unit.
Lifting the Unit If cables or chains are used to hoist the unit they must be the same length. Minimum cable length is 488 cm (192″) and spreader bars are required for 75-140 ton units. Care must be taken to prevent damage to the cabinet, coils, and condenser fans.
It is recommended to lift the unit with the outside air hood in the downward shipping position. However, the unit may be lifted with the outside air hood in the open position.

Before lifting unit, be sure that all shipping material has been removed from unit. Secure hooks and cables at all lifting points / lugs provided on the unit.
Hoist unit to a point directly above the curb and duct openings. Be sure that the gasket material has been applied to curb.
Carefully lower and align the unit with utility and duct openings. Lower the unit until the unit skirt fits around the curb. Some units are designed to overhang the curb. Take care that any recessed base rails fit around the curb. Make sure the unit is properly seated on the curb and is level.

Figure 3 – Lifting Details of a 75-140 ton Unit 29

Duct Connection Note: RN Series E cabinet (75-140 tons) units include base insulation standard.

CAUTION
Do not drill or punch holes in the base of the unit, from inside the unit or from below the unit to attach ductwork. Leaking may occur if unit base is punctured.

Figure 4 – Duct Connection 30

Outside Air Rain Hood Rain hood must be opened before startup of the unit. Fresh air intake adjustments must be made according to building ventilation of local code requirements.
75-140 ton Units Remove the shipping screws from each side of the closed hood.
Lift hood outward and attach the sides of the hood to the side of the unit.
Apply butyl caulking along the top and both sides of the rain hood. Take care to seal the top corners where the rain hood attaches to the unit.
Figure 5 – 55-140 ton Open Rain Hood
End Flashing Installation RN Series E cabinet units are 360.7 cm (142″) wide and the cabinet width will overhang the shipping trailer on each side.
In order to secure and protect the unit during transit the sheet metal end flashings have been removed from the unit. The slot created at the base of each end of the unit allows the unit to set firmly on the trailer deck.
Sheet metal flashings are shipped loose with the unit and once the unit is set into place the flashings must be installed on each end of the

unit to complete the finished seal at the base. The flashings are unit specific and designed to cover the slot at each end of the unit to prevent water run-off into the curb. Failure to attach and seal the end of unit with the flashings may result in water leakage into the curb.
Figure 6 – Factory Supplied End Flashings
CAUTION
In order to prevent water leakage into the roof curb, the factory provided sheet metal flashings MUST BE attached to the unit base to cover the shipping slots at both ends of the unit.
31

Motorized Exhaust & Rain Hood
The RNE unit will arrive with the motorized exhaust already in place. The rain hood ships inside of the return air section and must be field installed. After screwing the rain hood over the motorized exhaust with sheet metal screws, apply a sealant of butyl caulking.

Figure 7 – Motorized Exhaust Electrical For units not equipped with incoming power disconnect, means for all pole disconnection must be provided in the fixed wiring in accordance with local or national electrical codes. Verify the unit nameplate agrees with power supply. Connect power and control wiring to the unit as shown in Figure 8, and in the unit specific wiring diagram, which shows factory and field wiring and is attached to the inside of the door of the controls compartment. Route power and control wiring, separately, through the utility entry in the base of the unit. Do not run power and signal wires in the same conduit.

Table 2 – Nameplate Voltage Markings & Tolerances

Hz

Nameplate Voltage

Nominal System Voltage

Operating Voltage Range 1

Min

Max

Acceptable Performance Range2

Min

Max

115

120

104

127

108

126

208/230

208/240

187

254

187

252

208

208

187

228

187

228

60

230

240

208

254

216

252

265

277

240

293

249

291

460

480

416

508

432

504

575

600

520

635

540

630

230

230

50

400

400

198

254

208

254

344

440

360

440

Notes:

1. Operating voltage is the min and max voltage for which the unit can function. Never

operate outside of this min and max voltage.

2. The Acceptable Performance Range is the min and max voltage for which the unit

performance is designed and rated to give acceptable performance.

32

Heat Wheel Motor
Vestibule Heater
Sump Heater
Control Circuit
Electric Preheat
Electric Heat
Combustion Motor
Return Fans
Exhaust Fans
Supply Fans Condenser
Pumps Condenser
Fans Compressors

Table 3 – RN Series E Cabinet 75-145 ton Dual Point Power Methods Component Power Allocation by Dual Point Power Method (Feature 13A)

Feature Disconnect

13A

1

XX X

X

C-E

2

X

1

XX X

F-H

2

X X

1

XX X

X

J-L

2

X

1

XX XX

M-P

2

X

WARNING
Electric shock hazard. Before attempting to perform any installation, service, or maintenance, shut off all electrical power to the unit at the disconnect switches. Unit may have multiple power supplies. Failure to disconnect power could result in dangerous operation, serious injury, death, or property damage.

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

on 75-140 ton units is located in the controls and compressor section of the unit. See unit drawing for specific location.

CAUTION
Proper sealing of the electrical and gas entries into the unit must be performed. Failure to seal the entries may result in damage to the unit and property

WARNING
Ensure that there are no live electrical components or wiring exposed when adjusting charge, recovering charge, or purging the system. Ensure that earthing continuity is unbroken.
Route power and control wiring, separately, through the utility entry in the base of the unit. Do not run power and control signal wires in the same conduit. The utility entry

Size supply conductors based on the unit MCA rating. Supply conductors must be rated a minimum of 75°C (167°F).
Protect the branch circuit in accordance with code requirements. The unit 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.

33

Utility Entry
Figure 8 – Back View of Utility Entry and Power Switch from Control Compartment
(75-140 ton Units)
Note: All units are factory wired for 208V, 230V, 380V, 460V, or 575V. The transformer configuration must be checked by a qualified technician prior to service, especially if unit is to be connected to a 208V or 230V supply. For 208V service interchange the yellow and red conductor on the low voltage control transformer.
Red-Black for 208V Yellow-Black for 230V
Wire power leads to the unit’s terminal block or main disconnect. All wiring beyond this point has been completed by the manufacturer and cannot be modified without effecting the unit’s agency/safety certification.
Supply voltage must be within the min/max range shown on the unit nameplate. Available short circuit current must not exceed the short circuit current rating (SCCR) shown on the unit nameplate.

CAUTION
Three phase voltage imbalance will cause motor overheating and premature failure.
Three phase voltage imbalance will cause motor overheating and premature failure. The maximum allowable imbalance is 2%.
Voltage imbalance is defined as 100 times the maximum deviation from the average voltage divided by the average voltage.
Example: (221V+230V+227V)/3 = 226V, then 100*(226V-221V)/226V = 2.2%, which exceeds the allowable imbalance.
Check voltage imbalance at the unit disconnect switch and at the compressor terminal. Contact your local power company for line voltage corrections.
Installing contractor must check for proper motor rotation and check blower motor amperage listed on the motor nameplate is not exceeded. Motor overload protection may be a function of the variable frequency drive and must not be bypassed.
CAUTION
Rotation must be checked on all MOTORS AND COMPRESSORS of three phase units. Supply fan, exhaust fan, return fan, and condenser fan motors must all be checked by a qualified service technician at startup and any wiring alteration must only be made at the unit power connection.

34

CAUTION
Scroll compressors are directional and will be damaged by operation in the wrong direction. Low pressure switches on compressors have been disconnected after factory testing. Rotation must be checked by a qualified service technician at startup using suction and discharge pressure gauges and any wiring alteration must only be made at the unit power connection.

Wire control signals to the unit’s low voltage terminal block located in the controls compartment.

Fuses and Circuit Breakers The interrupting rating of fuses and circuit breakers is to be determined based on the KAIC rating of the unit. Refer to the wiring diagram for fuse sizing.

Table 4 ­ 35 KAIC Fuse Sizing

KAIC Construction

Component

Description

Interrupting Rating (kA)

Fuse

Class CC, 600V, 0.5A – 30A

200

Fuse

Class J, 600V, 35A – 600A

200

Disconnect

3P, 600V, 15A 600A

35

Table 4 ­ 35 KAIC Fuse Sizing

65 KAIC Construction

Component Fuse Fuse
Disconnect

Description
Class CC, 600V, 0.5A – 30A Class J, 600V, 35A – 600A 3P, 600V, 15A – 600A

Interrupting Rating (kA)
200
200
65

Variable Speed Compressors Variable speed compressors with VFD speed control are available on all RN Series E Cabinet units. Variable speed compressors must not be operated outside the factory determined turndown ratio or frequency range. The factory determined compressor VFD ranges are given in the following tables.

Table 5 – RN Series E Cabinet Variable

Speed Compressor VFD Frequency Range

Model (RNA-)

Compressor VFD Range (Hz)

75

25-94 Hz

90

25-85 Hz

105

25-100 Hz

120

25-100 Hz

130

25-88 Hz

140

25-100 Hz

CAUTION
No variable speed compressor shall operate below 35 Hz. Operating variable speed compressors outside the frequency range specified in this manual voids all warranties and may result in compressor failure.

Thermostat Control Wiring If a thermostat is used for unit control, locate the thermostat on an inside wall 1.2-1.5 meters (4-5 feet) above the floor where it will not be subjected to drafts, sun exposure, or heat from electrical fixtures of appliances. Control wiring must deliver adequate voltage to components to assure proper operation. Control voltage returning from controller circuit must be a minimum of 21 VAC. To assure proper wiring use the following chart to determine the allowable wiring distances.

35

Table 6 – Control Wiring

Wire Size (Stranded) Total Wire Distance – Copper Conductors Allowable Only

20 AWG

60.96 m

18 AWG

106.7 m

16 AWG

152.4 m

14 AWG

228.6 m

12 AWG

381.0 m

Total Wire Distance Allowable =

(Quantity of Control Wires) x

(Control Wire Distance)

200 ft 350 ft 500 ft 750 ft 1250 ft

Take the total wire distance allowable and divide by the quantity of wires to be connected. This indicates the distance allowable for that size wire. The wiring to the unit must not exceed the total wire distance allowable. If the voltage at the connectors is less than 21 VAC, isolation relays must be installed. If under external control 21 VAC must be field verified.

All external devices must be powered via a separate external power supply.

Example: A total of 8 wires must be pulled 75ft to a control the unit. What size wire must be used?

According to the Table 6, 16 AWG allows for 63ft (500 ft/8 wires) and 14 AWG allows for 94ft (750 ft/8 wires). Thus, 14 AWG must be used.

CAUTION
Ensure that wires are protected from damage and wear caused by normal operation of unit and environmental factors.

Condensate Drain Piping RN Series E Cabinet units are equipped with two condensate drain connections, one on the left side of the unit and one on the right side of the unit. P-traps must be field provided and installed.
All drain connections must be used and individually trapped to ensure a minimum amount of condensate accumulation in the drain pans. Use ABS type cement to join the drain pipe connections.
Note: The drain pan connections are 38 mm (1.5″) MPT fitting.
Drainage of condensate directly onto the roof may be acceptable in certain areas, refer to local codes. If condensate is to drain directly onto the roof, place a small drip pad below the drain to protect the roof from possible damage.
If condensate is piped into the building drainage system, the drain pipe must penetrate the roof external to the unit itself. The drain line must be pitched away from the unit at least 3.2mm (1/8 inch) per foot. On longer runs an air break must be used to ensure proper drainage.
CAUTION
Unit must not be operated without a ptrap. Failure to install a p-trap may result in overflow of condensate water into the unit.
Draw-through cooling coils will have a negative static pressure in the drain pan area. This will cause an un-trapped drain to back up due to air being pulled up through the condensate drain piping.

36

Condensate drain trapping and piping must conform to all applicable governing codes.
Draw-Through Coils
Figure 9 – Draw-Through Drain Trap
The X dimension on the draw-through trap must be at least equal to the absolute value of the negative static pressure in the drain pan plus one inch. To calculate the static pressure at the drain pan add the pressure drops of all components upstream of the drain pan, including the cooling coil, and add the return duct static pressure. Include the dirt allowance pressure drop for the filters to account for the worst-case scenario.
The height from top of the bottom bend of the trap to the bottom of the leaving pipe must be at least equal to one half of the X dimension. This ensures that enough water is stored in the trap to prevent losing the drain seal during unit startup
Note: The absolute value of the fan inlet pressure will always be greater than or equal to the absolute value of the static pressure in the drain pan on draw-through units, so the fan inlet pressure is a safe value to use for the drain pan static pressure.

Table 7 – Draw-Through Drain Trap Dimensions (Metric)

Draw-Through

Drain Pan Pressure

Trap Dimensions

Negative Static

X

X/2

(mmHg)

(millimeters) (millimeters)

-0.93

38.1

19.1

-1.87

50.8

25.4

-2.80

63.5

31.8

-3.74

76.2

38.1

-4.67

88.9

44.5

-5.60

101.6

50.8

-6.54

114.3

57.2

-7.47

127

63.5

-8.41

139.7

69.9

-9.34

152.4

76.2

-10.28

165.1

82.6

-11.21

177.8

88.9

-12.14

190.5

95.3

-13.08

203.2

101.6

-14.01

215.9

108.0

-14.95

228.6

114.3

Note: 1 mm = 0.1 cm

Table 8 – Draw-Through Drain Trap

Dimensions (Imperial)

Draw-Through

Drain Pan Pressure

Trap Dimensions

Negative Static

X

X/2

(inches of water)

(inch)

(inch)

-0.50

1.50

0.75

-1.00

2.00

1.00

-1.50

2.50

1.25

-2.00

3.00

1.50

-2.50

3.50

1.75

-3.00

4.00

2.00

-3.50

4.50

2.25

-4.00

5.00

2.50

-4.50

5.50

2.75

-5.00

6.00

3.00

-5.50

6.50

3.25

-6.00

7.00

3.50

-6.50

7.50

3.75

-7.00

8.00

4.00

-7.50

8.50

4.25

-8.00

9.00

4.50

37

CAUTION
All condensate drains must be trapped individually before they are connected to a common line.
CAUTION
All condensate drain connections must be used. Drain pans are sloped towards connections.
Startup
(See back of the manual for startup form.)
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.
WARNING
Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.
During startup, it is necessary to perform routine checks on the performance of the unit. This includes checking the air flow, air filters, condenser water flow, dampers, heaters, and refrigerant charge.

Filters Do not operate the unit without filters in place. Check the unit for correct filter placement during startup. Operation of the equipment without filters will result in a clogged evaporator coil.
Metal Mesh Filters Metal mesh filters are washable expanded aluminum mesh filters that are mounted over the outside air intake. These filters are normally located on the outside air hood. These filters are commonly used to prevent moisture carryover from the outside. An access panel is provided to slide out the filters for cleaning.
Airflow Balancing and Checking High performance systems commonly have complex air distribution and fan systems. Unqualified personnel must not attempt to adjust fan operation, or air circulation, as all systems have unique operations characteristics. Professional air balance specialists must be employed to establish actual operating conditions, and to configure the air delivery system for optimal performance.
Air Flow Monitoring Some units include an air flow monitoring device. Air flow can be measured either at the outside air opening, supply fans and/or return fans. Outside air uses a measuring grid and the fans use a piezo ring on their inlets to collect this information. A singular processor located in the vestibule handles all of these different readings.
Supply Fans RN Series E Cabinet units are equipped with direct drive backward curved plenum fan assemblies that are selected to deliver the air volume specified according to unit size and job requirements. This is done with variable

38

frequency drives. Field airflow adjustment may be required at startup.

Air Flow Adjustment For single set screw applications, tighten the set screw to the required torque setting (Table 9) using a calibrated torque wrench. For double set screw applications, tighten one set screw to half of the required torque setting (Table 9) using a calibrated torque wrench. Tighten the second set screw to the full required torque setting then tighten the first set screw to the full required torque setting.

Table 9 – Plenum Fan Set Screw

Specifications

SET SCREW DIAMETER

TORQUE (Nm [IN-LBS])

6.4 mm (1/4″)

9 [80]

7.9 mm (5/16″)

14.2 [126]

9.5 mm (3/8″)

27.12 [240]

The gap tolerances that are allowed between the blower and the inlet cone for the plenum fan blowers are shown in Figure 10. The inlet cone can be moved as necessary to center the cone in relation to the blower. The blower can be moved on the motor shaft to set the correct overlap. These tolerances are critical to the performance of the blower.

Figure 10 – Plenum Fan Gap Tolerances

CAUTION
Before completing startup and leaving the unit a complete operating cycle must be observed to verify that all components are functioning properly.
Adjusting Refrigerant Charge Adjusting the charge of a system in the field must be based on determination of liquid subcooling and evaporator superheat. On a system with an expansion valve liquid subcooling is more representative of the charge than evaporator superheat but both measurements must be taken.
CAUTION
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC’s and HCFC’s) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for non- compliance.
Before Charging Unit being charged must be at or near full load conditions before adjusting the charge. Units equipped with hot gas reheat must be charged with the hot gas reheat valves closed while the unit is in cooling mode to get the proper charge. After charging, operate the unit in reheat (dehumidification) mode to check for correct operation.
Units equipped with heat pump options must be charged in heating mode to get the proper charge. After charging, operate the unit in cooling mode to check for correct charge. Charge may need to be adjusted for cooling mode. If adjustments are made in the cooling mode heating mode must be rerun to verify proper operation.
39

After adding or removing charge the system must be allowed to stabilize, typically 10-15 minutes, before making any other adjustments.
The type of unit and options determine the ranges for liquid sub-cooling and evaporator superheat. Refer to the table below when determining the proper sub-cooling.
Checking Liquid Sub-Cooling Measure the temperature of the liquid line as it leaves the condenser coil.
Read the gauge pressure at the liquid line close to the point where the temperature was taken. You must use liquid line pressure as it will vary from discharge pressure due to condenser coil pressure drop.
Convert the pressure obtained to a saturated temperature using the appropriate refrigerant temperature-pressure chart.
Subtract the measured liquid line temperature from the saturated temperature to determine the liquid sub-cooling. Compare calculated sub-cooling to the tables below for the appropriate coil and system type and options.
Checking Evaporator Superheat Measure the temperature of the suction line close to the compressor. Read gauge pressure at the suction line close to the compressor.
Convert the pressure obtained to a saturated temperature using the appropriate refrigerant temperature-pressure chart.
Subtract the saturated temperature from the measured suction line temperature to determine the evaporator superheat.

Compare calculated superheat to the tables below for the appropriate coil and system type and options.
CAUTION
Expansion valve must be adjusted to approximately 4.4-8.3°C (8-15°F) of suction superheat. Failure to have sufficient superheat will damage the compressor and void the warranty.

Table 10 – Acceptable Fin & Tube AirCooled Condenser Coil Refrigeration Circuit
Values (Metric)

Air-Cooled Cond./Air-Source Heat

Pump

In Cooling Mode

Sub-Cooling

4.4-8.3°C

Sub-Cooling

with Hot Gas

4.4-8.3°C

Reheat

Superheat

4.4-8.3°C

Table 11 – Acceptable Fin & Tube Air-

Cooled Condenser Coil Refrigeration Circuit

Values (Imperial)

Air-Cooled Cond.

In Cooling Mode

Sub-Cooling

8-15°F

Sub-Cooling

with Hot Gas

8-15°F

Reheat

Superheat

8-15°F

40

Ambient (°C)
19.4 22.2 27.8 35.0 40.6 46.1

Table 12 – Acceptable Microchannel Air-Cooled Condenser Coil Liquid SubCooling Values (Metric)

4.4 5.0 – 7.8 5.6 – 8.3 5.6 – 8.3 5.6 – 8.3 6.1 – 8.9 5.6 – 8.3

Cooling Mode Liquid Sub-Cooling Values(°C)

Evaporator Coil Saturation Temperature (°C)

7.2

8.9

10.0

4.4 – 7.2

4.4 – 7.2

3.9 – 6.7

5.0 – 7.8

5.0 – 7.8

4.4 – 7.2

5.6 – 8.3

5.6 – 8.3

5.0 – 7.8

5.6 – 8.3

5.6 – 8.3

5.0 – 7.8

6.1 – 8.9

5.6 – 8.3

5.6 – 8.3

6.1 – 8.9

6.1 – 8.9

6.1 – 8.9

12.8 2.8 – 5.6 3.9 – 6.7 3.9 – 6.7 4.4 – 7.2 4.4 – 7.2 5.0 – 7.8

Table 13 – Acceptable Microchannel Air-Cooled Condenser Coil Liquid SubCooling Values (Imperial)

Ambient (°F)

Cooling Mode Liquid Sub-Cooling Values(°F)

Evaporator Coil Saturation Temperature (°F)

40

45

48

50

55

67

9 – 14

8 – 13

8 – 13

7 – 12

5 – 10

72

10 – 15

9 – 14

9 – 14

8 – 13

7 – 12

82

10 – 15

10 – 15

10 – 15

9 – 14

7 – 12

95

10 – 15

10 – 15

10 – 15

9 – 14

8 – 13

105

11 – 16

11 – 16

10 – 15

10 – 15

8 – 13

115

10 – 15

11 – 16

11 – 16

11 – 16

9 – 14

Notes: 1. Microchannel condenser coils are more sensitive to charge. The system must

be running in cooling mode with compressor, supply airflow & condenser fan

speed at full load. The sub-cooling value changes depending on the ambient

temperature reading and the microchannel evaporator coil saturation

temperature. To find the correct sub-cooling value, find the ambient

temperature on the first column and follow that across to the SST (4.4-12.8°C

[40-55°F]).

2. Superheat for Microchannel condenser coils must be between 4.4 and 8.3°C

(8 – 15°F)

41

Adjusting Sub-cooling and Superheat Temperatures The system is overcharged if the sub-cooling temperature is too high and the evaporator is fully loaded (low loads on the evaporator result in increased sub-cooling) and the evaporator superheat is within the temperature range as shown in Table 12 and Table 13 above (high superheat results in increased sub-cooling).
Correct an overcharged system by reducing the amount of refrigerant in the system to lower the sub-cooling.
CAUTION
DO NOT OVERCHARGE!
Refrigerant overcharging leads to excess refrigerant in the condenser coils resulting in elevated compressor discharge pressure. Maximum allowable charge of any single circuit is 133 kg (4700 oz).
The system is undercharged if the superheat is too high and the sub-cooling is too low.
Correct an undercharged system by adding refrigerant to the system to reduce superheat and raise sub-cooling.
If the sub-cooling is correct and the superheat is too high, the expansion valve may need adjustment to correct the superheat.

Freeze Stat Startup Freeze Stat is an adjustable temperature sensor (-23.3°C to 21.1°C [-10 to 70°F]) mounted on the tubing of the first cooling circuit and wired to de-energize all cooling circuits if tubing temperature falls below setpoint. Option is used to prevent freezing of evaporator coil.
Recommended Setting: 0°C to 1.7°C (32° F to 35º F)

42

Table 14 ­ R-410A Refrigerant Temperature-Pressure Chart (Metric)
°C KPA °C KPA °C KPA °C KPA °C KPA -6.7 539.9 8.3 928.8 23.3 1473.5 38.3 2213.3 53.3 3193.8 -6.1 551.6 8.9 946.0 23.9 1496.9 38.9 2245.0 53.9 3235.8 -5.6 564.0 9.4 963.2 24.4 1521.0 39.4 2276.7 54.4 3277.9 -5.0 576.4 10.0 980.5 25.0 1545.2 40.0 2309.1 55.0 3320.6 -4.4 588.8 10.6 998.4 25.6 1570.0 40.6 2341.5 55.6 3363.4 -3.9 601.2 11.1 1016.3 26.1 1594.8 41.1 2374.6 56.1 3406.8 -3.3 614.3 11.7 1034.9 26.7 1619.6 41.7 2408.4 56.7 3450.9 -2.8 627.4 12.2 1053.6 27.2 1645.1 42.2 2442.2 57.2 3495.1 -2.2 640.5 12.8 1072.2 27.8 1670.7 42.8 2476.0 57.8 3539.9 -1.7 654.3 13.3 1090.8 28.3 1696.2 43.3 2510.5 58.3 3585.4 -1.1 667.4 13.9 1110.1 28.9 1722.4 43.9 2544.9 58.9 3630.9 -0.6 681.2 14.4 1129.4 29.4 1749.3 44.4 2580.1 59.4 3677.1 0.0 695.7 15.0 1149.4 30.0 1775.5 45.0 2616.0 60.0 3724.0 0.6 709.5 15.6 1169.4 30.6 1802.4 45.6 2651.8 60.6 3771.6 1.1 724.0 16.1 1189.4 31.1 1829.9 46.1 2688.4 61.1 3819.1 1.7 738.5 16.7 1209.4 31.7 1857.5 46.7 2724.9 61.7 3867.4 2.2 752.9 17.2 1230.1 32.2 1885.8 47.2 2761.4 62.2 3915.7 2.8 768.1 17.8 1251.4 32.8 1914.1 47.8 2798.7 62.8 3965.3 3.3 783.3 18.3 1272.1 33.3 1942.3 48.3 2836.6 63.3 4015.0 3.9 798.4 18.9 1293.5 33.9 1971.3 48.9 2874.5 63.9 4065.3 4.4 814.3 19.4 1314.9 34.4 2000.2 49.4 2913.1 64.4 4115.6 5.0 829.5 20.0 1336.9 35.0 2029.9 50.0 2952.4 65.0 4167.3 5.6 846.0 20.6 1359.0 35.6 2059.5 50.6 2991.7 65.6 4219.1 6.1 861.9 21.1 1381.8 36.1 2089.2 51.1 3031.0 6.7 878.4 21.7 1403.8 36.7 2120.2 51.7 3071.0 7.2 895.0 22.2 1427.3 37.2 2150.6 52.2 3111.7 7.8 911.5 22.8 1450.0 37.8 2181.6 52.8 3153.1
43

Table 15 – R-410A Refrigerant Temperature-Pressure Chart (Imperial)
°F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 20 78.3 47 134.7 74 213.7 101 321.0 128 463.2 21 80.0 48 137.2 75 217.1 102 325.6 129 469.3 22 81.8 49 139.7 76 220.6 103 330.2 130 475.4 23 83.6 50 142.2 77 224.1 104 334.9 131 481.6 24 85.4 51 144.8 78 227.7 105 339.6 132 487.8 25 87.2 52 147.4 79 231.3 106 344.4 133 494.1 26 89.1 53 150.1 80 234.9 107 349.3 134 500.5 27 91.0 54 152.8 81 238.6 108 354.2 135 506.9 28 92.9 55 155.5 82 242.3 109 359.1 136 513.4 29 94.9 56 158.2 83 246.0 110 364.1 137 520.0 30 96.8 57 161.0 84 249.8 111 369.1 138 526.6 31 98.8 58 163.8 85 253.7 112 374.2 139 533.3 32 100.9 59 166.7 86 257.5 113 379.4 140 540.1 33 102.9 60 169.6 87 261.4 114 384.6 141 547.0 34 105.0 61 172.5 88 265.4 115 389.9 142 553.9 35 107.1 62 175.4 89 269.4 116 395.2 143 560.9 36 109.2 63 178.4 90 273.5 117 400.5 144 567.9 37 111.4 64 181.5 91 277.6 118 405.9 145 575.1 38 113.6 65 184.5 92 281.7 119 411.4 146 582.3 39 115.8 66 187.6 93 285.9 120 416.9 147 589.6 40 118.1 67 190.7 94 290.1 121 422.5 148 596.9 41 120.3 68 193.9 95 294.4 122 428.2 149 604.4 42 122.7 69 197.1 96 298.7 123 433.9 150 611.9 43 125.0 70 200.4 97 303.0 124 439.6 44 127.4 71 203.6 98 307.5 125 445.4 45 129.8 72 207.0 99 311.9 126 451.3 46 132.2 73 210.3 100 316.4 127 457.3
44

Condenser Fan Electronically Commutated Motor (ECM) Startup With Customer Provided Unit Controls AAON Condenser Head Pressure Module is used for variable speed control of the motor to maintain a head pressure. The motor is factory wired to the PWM outputs of the AAON Condenser Head Pressure Module.

See AAON literature for further information. (https://www.aaon.com/Controls) Note High voltage wires out of the motor: Black & Brown – 1 Phase Line Voltage Green – Ground
Low control voltage wires out of the motor: Blue – Common Yellow – Variable Speed Control

Color
Black
Brown Green Blue Yellow White Orange

Table 16 – ECM Condenser Fan Cycling Options

Customer

Terminal Connection Option 1 Option 2 Option 3

208-230 208-230 208-230

0.50 BWS

L1

VAC

VAC

VAC

208-230 208-230 208-230

0.50 BWS

L2

VAC

VAC

VAC

10 EYELET Ground

GND

GND

GND

0.50 BWS Common Common 24 VAC 24 VAC

0.50 BWS

Signal

PWM

24 VAC

0.50 BWS

Signal

0.50 BWS

Signal

24 VAC

RPM 300-1100 300

500

Rotation CCW

CCW

CCW

ECM Toolbox ID Variable Speed 4 Speed 3

20% PWM RPM 300

100% PWM RPM 1100

Option 4 208-230
VAC 208-230
VAC GND 24 VAC
24 VAC 24 VAC
850 CCW Speed 2

Option 5 208-230
VAC 208-230
VAC GND 24 VAC 24 VAC 24 VAC
1100 CCW Speed 1

VFD Controlled Condenser Fan Startup With Customer Provided Unit Controls the VFD’s are factory provided and factory programmed. VFD’s receives input from pressure transducers on each refrigerant circuit and vary the fan speed based on the pressure inputs to maintain a discharge (head) pressure. Standard pressure setpoint is 2.38 MPa (340 psi) for standard air-cooled systems and 2.76 MPa (400 psi) for modulating hot gas reheat air-cooled systems.

With the AAON Condenser Head Pressure Module is used to maintain a discharge pressure. The VFD is factory wired to the outputs of the AAON Condenser Head Pressure Module. See AAON literature for additional information. (https://www.aaon.com/products/controls).

45

Operation

Unit operations must be controlled with thermostat, or unit controller, never at the main power supply, except for servicing, emergency, or complete shutdown of the unit.
Thermostat Operation Heating Thermostat system switch – “Heat” Thermostat fan switch – “Auto” or “On” Thermostat temperature set to desired point.
Cooling Thermostat system switch – “Cool” Thermostat fan switch – “Auto” or “On” Thermostat temperature set to desired point.
Air Circulation Thermostat system switch – “Off” Thermostat fan switch – “Auto” or “On” No change of the thermostat temperature. With these settings, the supply blower will run continuously but the supply air will not be heated, cooled, or dehumidified.
System Off Thermostat system switch – “Off” Thermostat fan switch – “Auto” No change of the thermostat temperature. With these settings the system is shut down, with the exception of control system power.
Night and Weekend Unoccupied Operation To reduce the operating time of the unit when the space is unoccupied, such as nights and weekends, it is recommended that the temperature setting be raised about 5°F while unoccupied during the cooling season and lowered about -12.2°C (10°F) during the heating season.
46

WARNING
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 3 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 7 starts per hour.
Packaged DX Cooling Operation and Control When a call for cooling (G and Y1, Y2, etc.) is made the supply blower motors and compressors will energize.
Note: When using field controls any variable capacity compressors must run at 100% for 1 minute when starting.
Gas Heater Operation When heat (G and W1, W2, etc.) is called for the combustion motor starts and the ignition control is energized. The control sends 24 VAC to the main gas valve and high voltage to the igniter. If a burner flame has been detected within 10 seconds, the spark is extinguished and the flame continues. If a flame has not been detected after 10 seconds, the gas valve closes, the spark ceases and the induced draft blower continues to purge the heat exchanger. After 45 seconds of purge, the ignition system will attempt to light the burners again. Should no flame be detected after 3 tries, the ignition control will lock out the system. Power to the ignition control must be cycled to reset the heater control.
On a fault the gas train is shut down by a main limit located in the heat exchanger area or by

an auxiliary limit mounted in the supply fan compartment.

Electric Heating Operation When a call for heating (G and W1, W2, etc.) is made the supply blower motors and electric resistance heaters will energize. Heating is accomplished by passing electrical current through a specified amount of resistance heaters which will produce the required heat.

On a fault condition the main limit located in the supply air or the auxiliary limit located downstream the supply blower will remove power from all contactors.

Steam or Hot Water Preheating and Heating Operation Valve control for steam and hot water heating coils are by others. Heating is accomplished by passing steam or hot water through the steam or hot water coil assembly.

Chilled Water or Non-Compressorized DX Cooling Operation Controls for chilled water cooling coils and non-compressorized DX coil are by others.

Maintenance
(See back of the manual for maintenance log)

At least once each year, a trained, qualified service technician must check out the unit. Fans, evaporator coils, and filters must be inspected at least monthly.

Supply Fans

WARNING

Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.

CAUTION
Blower wheels and bands must be inspected for excessive dust build up periodically and cleaned if required. Excessive dust build up on blower wheels may cause an unbalanced state; leading to vibration and/or component failure. Damages due to excessive dust build up will not be covered under factory warranty.
Lubrication All original fan motors and bearings are furnished with factory lubrication. Some applications will require that bearings be relubricated periodically. The schedule will depend on the operating duty, temperature variations or other severe atmospheric conditions.
Re-lubricate bearings when at normal operating temperatures, but not running. Rotate the fan shaft by hand and add only enough grease to purge the seals. DO NOT OVERLUBRICATE.
Recommended greases are: SHELL OIL – DOLIUM R CHEVRON OIL – SRI No. 2 TEXACO INC. – PREMIUM RB
DX Cooling Set unit controls to cooling mode of operation with supply fans on. Check the fan for correct operating direction, amperage and voltage. Check compressor operation, rotation, amperage and voltage to the unit nameplate (check the amperage on the load side of the compressor contactor).
Condensate Drain Pans Drain pans will have moisture present and require periodic cleaning to prevent microbial growth. Cleaning of the drain pans will also prevent any possible plugging of the drain lines and overflow of the pan itself. Cleaning of the drain pans and inside of the
47

unit must be done only by qualified service technician.
Brazed Plate Heat Exchanger Cleaning Because of a normally high degree of turbulence in brazed plate heat exchangers, for many applications the heat exchanger channels are self cleaning. For applications that are not self cleaning (i.e. hard water at high temperatures, etc.) or applications where additional cleaning is desired, it is possible to clean the brazed plate heat exchanger by circulating a cleaning liquid.
Use a tank with weak acid, 5% phosphoric acid (H3PO4) or, if the exchanger is frequently cleaned, 5% oxalic acid (H2C2O4). Pump the cleaning liquid through the exchanger. For optimum cleaning, the cleaning solution flow rate must be a minimum of 1.5 times the normal flow rate, preferably in a back-flush mode. After cleaning, the heat exchanger must be rinsed with clean water. A solution of 1-2% sodium hydroxide (NaOH) or sodium bicarbonate (NaHCO) before the last rinse ensures that all acid is neutralized.
E-Coated Coil Cleaning Documented routine cleaning of e-coated coils is required to maintain coating warranty coverage for fin and tube and microchannel coils. See the AAON E-Coated Coil Maintenance Record sheet.
WARNING
Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.
Surface loaded fibers or dirt must be removed prior to water rinse to prevent restriction of airflow. If unable to back wash the side of the coil opposite of the coils entering air side, then surface loaded fibers
48

or dirt must be removed with a vacuum cleaner. If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool must be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges bent over) if the tool is applied across the fins.
Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibers and dirt into the coil. This will make cleaning efforts more difficult. Surface loaded fibers must be completely removed prior to using low velocity clean water rinse.
A monthly clean water rinse is recommended for coils that are applied in coastal or industrial environments to help to remove chlorides, dirt, and debris. It is very important when rinsing, that water temperature is less than 54.4°C (130°F) and pressure is less than 689.5 kpa (100 psig) to avoid damaging the fin edges. An elevated water temperature (not to exceed 54.4°C [130°F]) will reduce surface tension, increasing the ability to remove chlorides and dirt.
CAUTION
High velocity water from a pressure washer or compressed air must only be used at a very low pressure to prevent fin and/or coil damages. The force of the water or air jet may bend the fin edges and increase airside pressure drop. Reduced unit performance or nuisance unit shutdowns may occur.
Quarterly cleaning is essential to extend the life of an e-coated coil and is required to maintain coating warranty coverage. Coil cleaning shall be part of the unit’s regularly scheduled maintenance procedures. Failure to clean an e-coated coil will void the warranty and may result in reduced efficiency and durability.

CAUTION
Harsh chemicals, household bleach, or acid cleaners must not be used to clean outdoor or indoor e-coated coils. These cleaners can be very difficult to rinse out of the coil and can accelerate corrosion and attack the e-coating. If there is dirt below the surface of the coil, use the recommended coil cleaners.
For routine quarterly cleaning, first clean the coil with the below approved coil cleaner. After cleaning the coils with the approved cleaning agent, use the approved chloride remover to remove soluble salts and revitalize the unit.
Recommended Coil Cleaner The following cleaning agent, when used in accordance with the manufacturer’s directions on the container for proper mixing and cleaning, has been approved for use on e-coated coils to remove mold, mildew, dust, soot, greasy residue, lint, and other particulate:
Enviro-Coil Cleaner: AAON PN: V82540
GulfClean TM Coil Cleaner; AAON PN: G074480
Recommended Chloride Remover GulfClean Salt ReducerTM; AAON PN: G074490
GulfClean Salt ReducerTM is used to remove soluble salts from the e-coated coil, follow the manufacturer’s instructions. This product is not intended for use as a degreaser. Any grease or oil film must first be removed with GulfClean TM Coil Cleaner.
Remove Barrier – First ensure the power to the unit is off and locked out. Clean the area

around the unit if needed to ensure leaves, grass or loose debris will not be blown into the coil. Soluble salts adhere themselves to the substrate. For the effective use of this product, the product must be able to come in contact with the salts. These salts may be beneath any soils, grease or dirt; therefore, these barriers must be removed prior to application of this product. As in all surface preparation, the best work yields the best results.
Application – Apply GulfClean TM Coil Cleaner directly onto the substrate. Sufficient product must be applied uniformly across the substrate to thoroughly wet out surface, with no areas missed. This may be accomplished by use of a pump-up sprayer or conventional spray gun. Apply the cleaner to unit interior air exiting side coil surfaces first. Work in sections/panels moving side to side and from top to bottom. Allow the cleaning solution to soak for 5 to 10 minutes. Then move on to the exterior using the same method.
Rinse – Using pressurized potable water such as a garden hose, (< 689.5 kpa [100 psi]), rinse the coils and continue to always work in sections/panels.
Continue until all coil areas on the inside of the unit have been rinsed. Note: Coils must always be cleaned / back flushed, opposite of airflow to prevent impacting the dirt into the coil.
Repeat these steps with GulfClean TM Salt Reducer. When finished replace all panels and tops that were removed.
Microchannel Coil Cleaning Cleaning microchannel coils is necessary in all locations. In some locations it may be necessary to clean the coils more or less often than recommended. Condenser coil must be cleaned at a minimum of once a year. In locations where there is commonly debris or
49

a condition that causes dirt/grease build up it may be necessary to clean the coils more often. Proper procedure must be followed at every cleaning interval. Using improper cleaning technique or incorrect chemicals will result in coil damage, system performance fall off, and potentially leaks requiring coil replacement.
Documented routine cleaning of microchannel coils with factory provided ecoating is required to maintain coating warranty coverage. Use the E-Coated Coil Cleaning section for details on cleaning ecoated coils.
Field applied coil coatings are not recommended with microchannel coils.
Allowed Chemical Cleaners and Procedures AAON recommends certain chemicals that can be used to remove buildup of grime and debris on the surface of microchannel coils. These chemicals have been tested for performance and safety and are the only chemicals that AAON will warrant as correct for cleaning microchannel coils.
There are two procedures that are outlined below that will clean the coils effectively without damage to the coils. Use of any other procedure or chemical may void the warranty to the unit where the coil is installed. With all procedures make sure the unit is off before starting.
WARNING
Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.
The water pressure used to clean must not exceed 100 psi, from no closer than 6 inches from the coils, and with the water aimed perpendicular to the coils.
50

1 Simple Green Simple Green is available from AAON Parts and Supply (Part

T10701) and is biodegradable with a neutral 6.5 pH A 4 to 1 solution is recommended. Use the following procedure.
1. Rinse the coil completely with water. Use a hard spray but be careful not to bend or damage the fins. A spray that is too hard will bend the fins. Spray from the fan side of the coil.
2. With a pump sprayer filled with a mix of 4 parts water to one part Simple Green spray the air inlet face of the coil. Be sure to cover all areas of the face of the coil.
3. Allow the coil to soak for 10-15 minutes.
4. Rinse the coil with water as in step one. 5. Repeat as necessary.

2 Water Flush This procedure can be used when the only material to cause the

coil to need cleaning is debris from plant material that has impinged the coil face.
1. Rinse the coil completely with water. Use a hard spray but be careful not to bend or damage the fins. A spray that is too hard will bend the fins. Spray from the fan side of the coil.
2. Spray and rinse the coil from the face.
CAUTION
Use pressurized clean water, with pressure not to exceed 689.5 kpa (100 psi). Nozzle must be 15.25 centimeters (6″) and perpendicular to the coil face. Failure to do so could result in coil damage.

Application Examples The two procedures can be used to clean microchannel coils. They will fit with the application depending on the area. In some areas where the spring/summer has a large cottonwood bloom #2 might work fine if the unit is installed on an office building and no other environmental factors apply.
Generally the best and broadest based procedure is #1. The grease cutting effect of the Simple Green is good for restaurant applications.
Other Coil Cleaners There are many cleaners on the market for condenser coils. Before using any cleaner that is not covered in this section you must get written approval from the AAON warranty and service department. Use of unapproved chemicals will void the warranty.
AAON testing has determined that unless a chemical has a neutral pH (6-8) it must not be used.
Beware of any product that claims to be a foaming cleaner. The foam that is generated is caused by a chemical reaction to the aluminum fin material on tube and fin coils and with the fin, tube, and coating material on microchannel coils.
Microchannel coils are robust in many ways, but like any component they must be treated correctly. This includes cleaning the coils correctly to give optimal performance over many years.
Roofing The cleaning procedures outlined here use relatively benign ingredients. When working with a rooftop unit care must be taken to make sure the chemicals will not adversely affect the roof coating. Checking with the roofing supplier/manufacturer is the best way to proceed. If the roofing supplier/manufacturer is not available testing

of the chemicals on the roof coating is recommended.
Commercial roofing material manufacturers using PVC and EPDM have been contacted and indicate that there should be no problem with any of the procedures outlined above.
Refrigerant Removal and Evacuation If removal of refrigerant is required for any maintenance or servicing, conventional procedures must be used and removal of refrigerant must be in accordance with local and national regulations.
Refrigerant must be recovered into the correct recovery cylinders in accordance with local and national regulations. Recovery cylinders must be labeled properly. Ensure that the correct number of cylinders are available for holding the entire charge of the system. Cylinders must have pressure relief and shut-off valves that are in proper working order. Fully evacuate a recovery cylinder before use.
The recovery equipment must be in good working order with a set of instructions concerning the equipment that is at hand. Ensure that equipment is suitable for the recovery of flammable refrigerant used. If in doubt, the manufacturer should be consulted. In addition, a set of calibrated weighing scales must be available and in good working order. Ensure hoses are complete with leakfree disconnect couplings and in good condition.
When removing refrigerant to open the system, evacuate the system and flush or purge the system continuously with an inert gas when using a flame to open the circuit. The system must be purged with oxygen-free nitrogen to render the appliance safe for flammable refrigerant. Compressed air or oxygen must not be used. When pulling a vacuum, ensure that the outlet of the vacuum pump is not near any potential ignition source and in a well ventilated area.
51

The recovered refrigerant is to be processed according to local legislation in the correct recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. Do not heat the compressor body by using an open flame or other ignition sources to accelerate this process. Remove any drained oil safely.
Options
(See back of the manual for maintenance log)
Heating Coils One or two row hot water and steam heating and preheating coils can be factory installed. All valve controls for heating operation are field supplied and field installed. Hot water and steam coil connections are spun copper tube.

Water coils must not be subjected to entering air temperatures below 3.3°C (38°F) to prevent coil freeze-up. If air temperature across the coil is going to be below this value, use a glycol solution to match the coldest air expected.
WARNING
Piping, pressure limiting devices, backflow preventers and all other safety requirements shall be in accordance with national and local codes.
CAUTION
The unit shall have proper sealing of the water piping entries into the unit. Failure to seal the entries may result in damage to the unit and property.

Table 17 – Hot Water Coil & Steam Coil Connection Sizes

Model (RNA-) 075, 090, 105, 120, 130, 140

Hot Water Coil

Steam Coil

Connection Size Connection Size

Coil Connection Quantity*

2-1/8″

2-1/8″

2/2

Note: 2 1/8″ = 54 mm

• In/Out Connections

Table 18 – Preheat Hot Water Coil Connection Sizes

Model (RNA-)
075 090, 105, 120, 130, 140

Preheat Hot Water Coil Connection Coil Connection

Size

Quantity*

1-3/8″ 1-3/8″
Note: 1 3/8″ = 35 mm

2/2 4/4

• In/Out Connections

52

Table 19 – Preheat Steam Coil Connection Sizes

Model (RNA-)
075 090, 105, 120, 130, 140

Preheat Steam Coil Connection Size

Coil Connection Quantity*

2-1/8″ 2-1/8″
Note: 2 1/8″ = 54 mm

4/4 4/4

• In/Out Connections

Chilled Water Coil Four or six row chilled water cooling coils can be factory installed. All valve controls for cooling operation are field supplied and field installed. Chilled water coil connections are spun copper tube.

Table 20 – Chilled Water Coil Connection Sizes

Model (RNA-)

Chilled Water Coil Connection Size

Coil Connection Quantity*

055, 065, 075

2 1/8″

2/2

090, 105, 120, 130, 140

2 1/8″
Note: 2 1/8″ = 54 mm

4/4

• In/Out Connections

Table 21 – Min and Max Water Pressures and Temps

Min. Entering Air Max Entering Air Min. Entering Water Max Entering Water Min. Water Pressure Max Water Pressure

Chilled Water

Hot Water

15.6°C (60°F)

4.4 °C (40°F)

37.8°C (100°F)

26.7°C (80°F)

1.7°C (35°F)

60°C (140°F)

18.3°C (65°F)

93.3°C (200°F)

0 kpa (15 psig)

2068kpa (300 psig)

53

Packaged Direct Expansion (DX) Units
WARNING
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 3 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 7 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, expansion valves and scroll compressors.
CAUTION

CRANKCASE HEATER OPERATION

Some units are equipped with compressor crankcase heaters, which must 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
54

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.
Note: Low Ambient Operation Air-cooled DX units without a low ambient option, such as condenser fan cycling or the -17.8°C (0°F) low ambient option, will not operate in the cooling mode of operation properly when the outdoor temperature is below 12.8°C (55°F). Low ambient and/or economizer options are recommended if cooling operation below 12.8°C (55°F) is expected.

CAUTION
Polyester (POE) and Polyvinyl ether (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: 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 must be switched off at the thermostat during the heating season.
Evaporator Coil
WARNING
Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.
Removal Isolate the evaporator section and recover the refrigerant in that section. Make sure to weigh the amount of refrigerant recovered.
Remove the expansion valve bulbs and/or the valve controller from the suction lines.
Disconnect the suction and liquid line copper connections to the evaporator coil.
Depending on the configuration, remove additional components such as filters, reheat coils or UV lights to allow the coil to be removed.

Figure 11 – Evaporator Coil Access
Remove the screws attaching the filter rack to the evaporator coil blank-off panels at the door opening and along the top of the coil.
Remove the screws attaching the filter rack to the back wall. Angle filter rack away from coil so it fits through the door opening. It may be necessary to remove economizer damper assembly.
Remove screws attaching access side, back, and top blank-off panels to the evaporator coil and the unit.
Angle the coil so that it fits through the door opening.
Remove the evaporator coil.
Reinstallation Install the coil in the unit drain pan. There should be about a 6.4 mm (1/4″) gap between the upstream side of the coil and the back of the drain pan.
Secure the coil to the back wall of the unit with the blank-off panel. Attach the top and access side blank-off panels to the coil.
Attach the filter rack to the back, top, and access side coil blank-off panels upstream of the coil. Reinstall economizer damper assembly if necessary.

55

Connect the suction and liquid copper connections to the evaporator coil. Reinstall the expansion valve bulbs on the suction lines.
Depending on the configuration, additional components might need to be reinstalled.
Evacuate the refrigerant systems. Weigh in the nameplate refrigerant charge.
See Adjusting Refrigerant Charge section to check for proper sub-cooling and superheat of the refrigerant systems.
Condenser Fans Condenser fans and motors can be removed and reinstalled as individual assemblies.
WARNING
Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.
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.
Removal Take off the fan grill by removing the screws that attach it to the orifice.
The condenser fan motor wires can then be accessed and disconnected.
Remove the screws that attach the orifice to the condenser assembly. The screws are
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located on the top of the orifice around the perimeter, and in some cases, through the side of the condenser assembly into the orifice. With the wires disconnected and the screws removed, the fan, motor and orifice assembly can be lifted off the unit.
Figure 12 – Removal of a Condenser Fan Assembly
Reinstallation Set the condenser fan, motor and orifice assembly back into the condenser assembly with the motor wires on the side closest to the control panel. Attach the orifice to the condenser assembly using all of the points where screws were removed. Reconnect the fan motor wires. Attach the fan grill at all of the points where screws were removed. Suction Filter In an effort to help protect the compressors from contaminants during testing and startup, AAON is now factory installing pleated

replaceable core suction line filters on the RN Series E Cabinet products (75-140 tons)

Figure 13 – RPE-48-BD filter element
One month after startup, remove the RPE-48BD filter element for the lowest possible pressure drop. Removing the suction line filter will improve the efficiency and capacity of the unit. AAON installs isolation ball valves on both sides of the suction line filter so the complete system will not have to be reclaimed/evacuated.
Suction Filter Removal Instructions 1. Shut down operation of the unit 2. Close both shut-off valves to isolate the suction filter 3. Reclaim the refrigerant from the suction filter section
4. Remove the bolts from the suction filter end plate
5. Remove the pleated filter assembly

6. Replace the suction filter end plate and bolts
7. Evacuate the suction filter assembly to 300 microns
8. Open both shut-off valves
Energy Recovery Units Some RN Series E Cabinet units have been equipped with an energy recovery wheel. AAON provides options for either an aluminum energy recovery wheel or a polymer energy recovery wheel. Follow the instructions for the specific type of energy recovery wheel in your installed equipment.
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.
Initial Mechanical Check and Setup
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Outdoor units equipped with outside air intake will have an outside air hood. The outside air hood must be opened prior to unit operation.
Outdoor air intake adjustments must be made according to building ventilation, or local code requirements.
After the unit installation is complete, open the cassette access door and determine that the energy wheel rotates freely when turned by hand. Apply power and observe that the wheel rotates. If the wheel does not rotate when power is applied, it may be necessary to readjust the “diameter air seals”.
Controls A variety of controls and electrical accessories may be provided with the equipment. Identify the controls on each unit by consulting appropriate submittal, or order documents, and operate according to the control manufacturer’s instructions. If you cannot locate installation, operation, or maintenance information for the specific controls, then contact your sales representative, or the control manufacturer for assistance.
WARNING
Do not alter factory wiring. Deviation from the supplied wiring diagram will void all warranties, and may result in equipment damage or personal injury. Contact the factory with wiring discrepancies.
Aluminum Energy Recovery Wheel This section is provided to assure the energy recovery feature will be properly setup to perform in accordance with the job specifications for your particular application.

Figure 14 – Aluminum Energy Recovery Wheel
1. Monolith energy recovery wheel 2. Purge Sector 3. Profile 4. Motor 5. Brush Plate 6. Rotor Hub 7. Casing
Aluminum Wheel Check Purge Location The purge sector is an optional element so it may not be installed on some units. Ensure the purge sector is mounted in the correct location. Purge sector must be located on the fresh supply air side. Based on the airflow and the wheel rotation in the following illustrations, notice the correct locations for the purge sector.

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Figure 15 – Aluminum ERW Purge Sector Location
Aluminum Wheel Air Seals Both non-contact sealing on wheel peripheries and brush sealing middle beam are maintenance-free but their condition must be checked every year. During the inspection, check their tightness and overall visual condition. Non-contact seals must not be flipped, rolled or pierced at any place
If seals are damaged, please contact our technical support immediately. A damaged seal may cause efficiency deterioration, mixing of an air flows and unwanted leakages in the system, especially in environments with hygienic requirements.
Aluminum Wheel Brush Plate Brushes are located on both upper sides of the profiles. Inspect their condition and whether they adhere to the surface of the wheel matrix. Over time, the brushes may lose their cleaning properties and it will be necessary to replace them or simply chan

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