AAON RN Series Installation Operation & Maintenance
  1. Manuals
  2. Brands
  3. AAON Manuals
  4. Air Handlers
  5. RN Series
  6. Installation operation & maintenance

AAON RN Series Installation Operation & Maintenance

Packaged rooftop units, heat pumps, & outdoor air handling units
Hide thumbs Also See for RN Series:
Table of Contents

Advertisement

Quick Links

Packaged Rooftop Units, Heat Pumps,
Installation, Operation,
UL-60335
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.
& Outdoor Air Handling Units
& Maintenance
o Do not store gasoline or other flammable
o WHAT TO DO IF YOU SMELL GAS
o Startup and service must be performed by a
RN Series
Next Gen RN
WARNING
vapors and liquids in the vicinity of this or any
other appliance
 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.
Factory Trained Service Technician.
(11-140 tons)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the RN Series and is the answer not in the manual?

Questions and answers

Eric Otto
February 17, 2025

What is the lifting weight of an "RNA-060" rooftop Unit

0

Subscribe to Our Youtube Channel

Related Manuals for AAON RN Series

Summary of Contents for AAON RN Series

  • Page 1 RN Series Next Gen RN (11-140 tons) Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units Installation, Operation, & Maintenance UL-60335 WARNING WARNING o Do not store gasoline or other flammable FIRE OR EXPLOSION HAZARD vapors and liquids in the vicinity of this or any...

  • Page 3: Table Of Contents

    Table of Contents AAON® RN Series Next Gen RN Features and Options Introduction .......... 8 Safety .............................. 9 RN Series - Next Gen RN Feature String Nomenclature ............. 15 General Information ........................29 Codes and Ordinances ......................29 Receiving Unit .......................... 30 Storage ............................
  • Page 4 Maintenance ..........................68 Supply Fans ..........................68 Power Exhaust Motor and Belt Removal ................. 69 DX Cooling ..........................70 Condensate Drain Pans ......................70 Brazed Plate Heat Exchanger Cleaning ..................70 E-Coated Coil Cleaning ......................71 Microchannel Coil Cleaning ..................... 72 Options ............................
  • Page 5 Table 3 – E Cabinet Unit Clearances .................... 32 Table 4 - Nameplate Voltage Markings & Tolerances ..............44 Table 5 - RN Series E Cabinet 55, 65, and 75-145 ton Dual Point Power Methods ....44 Table 6 – 35 KAIC Fuse Sizing ....................47 Table 7 –...
  • Page 6 Table 42 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Unit Filters ......... 116 Table 43 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Energy Recovery Wheel Filters . 117 Table 44 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Final Filters ........ 117 Table 45 - RN Series D Cabinet 26, 31, and 40 ton Pre Filters ..........
  • Page 7 Figure 50 - Temperature Dial ....................... 98 Figure 51 - Preheat Controller ....................100 Figure 52 - RN Series Gas Heat Exchanger ................104 Figure 53 - Example 11-50, 60 & 70 ton through the Base Gas Piping ........108 Figure 54 - Example 55, 65 and 75-140 ton for across the Roof Gas Piping ......

  • Page 8: Aaon® Rn Series Next Gen Rn Features And Options Introduction

    AAON® RN Series Next Gen RN Features and Options Introduction Energy Efficiency Safety Continued Direct Drive Backward Curved Plenum Supply/Return Firestats • • Supply Fans Two-Step, Variable Capacity and Installation and Maintenance • Variable Speed R-410A Scroll Clogged Filter Switch •...

  • Page 9: Safety

    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.
  • Page 10 WARNING WARNING FIRE, EXPLOSION OR CARBON During installation, testing, servicing, MONOXIDE POISONING HAZARD and troubleshooting of the equipment it may be necessary to work with live Failure to replace proper controls electrical components. Only could result in fire, explosion, or qualified licensed electrician...
  • Page 11 WARNING WARNING GROUNDING REQUIRED UNIT HANDLING All field installed wiring must be To prevent injury or death lifting completed by qualified personnel. equipment capacity shall exceed unit Field installed wiring must comply with weight by an adequate safety factor. NEC/CEC, local and state electrical Always test-lift unit not more than 24 code requirements.
  • Page 12 WARNING WARNING WATER PRESSURE Some chemical coil cleaning compounds are caustic or toxic. Use Prior to connection of condensing these substances only in accordance water supply, verify water pressure is with manufacturer’s usage less than maximum pressure shown instructions. Failure follow on unit nameplate.
  • Page 13 AAON Inc. warranties overload settings. These are set by the AAON factory for the protection of heat exchanger these motors/compressors and must manufacturer’s warranties. not be adjusted over this factory setpoint or bypassed.
  • Page 14 5. Always install and operate furnace within WARNING the intended temperature rise range and duct system external static pressure (ESP) as specified on the unit nameplate. Do not operate UV-C lamps outside of the unit. 6. The supply and return air ducts must be derived from the same space.

  • Page 15: Rn Series - Next Gen Rn Feature String Nomenclature

    RN Series - Next Gen RN Feature String Nomenclature A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 16 RN Series - Next Gen RN Feature String Nomenclature 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 17 RN Series - Next Gen RN Feature String Nomenclature 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0 0 0 : 0 1 -...
  • Page 18 RN Series - Next Gen RN Feature String Nomenclature 0 A G 0 K - RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 -...
  • Page 19 RN Series - Next Gen RN Feature String Nomenclature - E 0 0 - 0 0 RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0...
  • Page 20 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0...
  • Page 21 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0...
  • Page 22 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 -...
  • Page 23 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 24 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 25 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 26 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 27 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...
  • Page 28 RN Series - Next Gen RN Feature String Nomenclature RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A G 0 K - E 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - C A - 0 0 0 0...

  • Page 29: General Information

    Codes and Ordinances efficiency. RN Series units have been tested and certified, by ETL, in accordance with UL Certification of Gas Heat Models Safety Standard 60335-2-40 4th Edition/CSA a.

  • Page 30: Receiving Unit

    Contact the AAON Warranty National Electric Code, ANSI/NFPA 70 or Department for assistance with handling the current Canadian Electrical Code CSA damaged goods, repairs, and freight claims: C22.1.

  • Page 31: Wiring Diagrams

    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 Figure 2 - RN Series C Cabinet, 11, 13, 16-25 and 30...

  • Page 32: Setting The Curb

    Where the supply or warm air duct Right Side Front passes through a combustible roof, a clearance of 2.54cm (1 inch) must be Figure 3 - RN Series D Cabinet, maintained between outside 26, 31-50, 60 and 70 tons edges of the duct and combustible material in accordance with National Table 3 –...

  • Page 33: Figure 5 - Rn Series 26, 31-50, 60, And 70 Ton Unit Isolator Locations

    Figure 5 - RN Series 26, 31-50, 60, and 70 ton Unit Isolator Locations...

  • Page 34: Figure 6 - Steel Mounting

    Figure 6 - Steel Mounting...

  • Page 35: Forklifting The Unit (11, 13 And 16-30 Ton)

    (right) side. Forks Figure 7 - Forklifting an RN Series C Cabinet, 11, 13 and 16-30 tons Lifting the Unit Before lifting unit, be sure that all shipping If cables or chains are used to hoist the unit material has been removed from unit.

  • Page 36: Figure 8 - Lifting Details Of A 11-25 And 30 Ton Standard Or Power Exhaust Unit

    Make sure the unit is properly seated on the curb and is level. Figure 8 - Lifting Details of a 11-25 and 30 ton Standard or Power Exhaust Unit Figure 9 - Lifting Details of a 11-25 and 30 ton Energy Recovery Wheel or Power Return Unit...

  • Page 37: Figure 10 - Lifting Details Of A 26, 31-50, 60 And 70 Ton Unit

    Figure 10 - Lifting Details of a 26, 31-50, 60 and 70 ton Unit Figure 11 - Lifting Details of a 55, 65 and 75-140 ton Unit...

  • Page 38: Duct Connection

    Duct Connection 140 tons) units include base insulation There must be a minimum of a 30.5 cm (12”) standard. straight duct off of the supply duct with no size reduction and then a limitation of no more than a 45° transition for the next 61cm (24”), this is to insure proper performance of the heaters.

  • Page 39: Seismic Curb Installation

    All mounting details listed must be followed to Structural engineer of record must approve achieve seismic certification. The AAON field provided building anchorage to unit or unit must be certified to ICC-ES AC156 curb in compliance with OSP-0180-10. Use...

  • Page 40: Figure 13 - Solid Bottom Seismic Curb With Filters

    Figure 13 – Solid Bottom Seismic Curb with Filters...

  • Page 41: Outside Air Rain Hood

    Figure 14 - Seismic Solid Bottom Curb without Filters Cross Section Figure 15 - Seismic Solid Bottom Curb without Filters Detail A Figure 16 - Seismic Solid Bottom Curb without Filters Detail B Figure 17 - Seismic Rigid Mount Curb Outside Air Rain Hood position.

  • Page 42: Figure 18 - 11, 13 And 16-30 Ton Closed Rain Hood

    Attach the side pieces to the top of the hood 26 and 31-70 ton Units using the provided screws and attached the Remove the shipping screws from each side side pieces to the end of the unit through the of the closed hood. flange.

  • Page 43: End Flashing Installation

    End Flashing Installation The flashings are unit specific and designed On RN Series E cabinet units that are 3.6 m to cover the slot at each end of the unit to (142”) wide (RN-55, 65, 75, 90, 105, 120, prevent water run-off into the curb.

  • Page 44: Electrical

    2. The Acceptable Performance Range is the min and max voltage for which the unit performance is designed and rated to give acceptable performance. Table 5 - RN Series E Cabinet 55, 65, and 75-145 ton Dual Point Power Methods Component Power Allocation by Dual Point Power Method (Feature 13A)

  • Page 45: Figure 23 - Unit Utility Entry

    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.

  • Page 46: Figure 25 - Back View Of Utility Entry And Power Switch From Control Compartment

    CAUTION Three phase voltage imbalance will cause motor overheating 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.

  • Page 47: Variable Speed Compressors

    Table 7 – 65 KAIC Fuse Sizing CAUTION 65 KAIC Construction Interrupting Scroll compressors are directional Component Description Rating (kA) and will be damaged by operation in Class CC, the wrong direction. Low pressure Fuse 600V, 0.5A - 30A switches on compressors have been Class J, Fuse disconnected after factory testing.

  • Page 48: Thermostat Control Wiring

    installed. If under external control 21 VAC CAUTION must be field verified. All external devices must be powered via a No variable speed compressor shall separate external power supply. operate below 35 Hz. Operating variable speed compressors outside the frequency range specified in this Example: A total of 8 wires must be pulled 75ft to a manual voids all warranties and may...

  • Page 49: Draw-Through Coils

    penetrate the roof external to the unit itself. duct static pressure. Include the dirt The drain line must be pitched away from the allowance pressure drop for the filters to unit at least 3.2mm (1/8 inch) per meter account for the worst-case scenario. (foot).

  • Page 50: Startup

    Startup Table 11 - Draw-Through Drain Trap Dimensions (Imperial) (See back of the manual for startup form.) Draw-Through Drain Pan Pressure Trap Dimensions WARNING Negative Static (inches of water) (inch) (inch) -0.50 1.50 0.75 Improper installation, adjustment, -1.00 2.00 1.00 alteration, service or maintenance can -1.50 2.50...

  • Page 51: Supply Fans

    Supply Fans RN Series units are equipped with direct The following photos of a wheel are provided drive backward curved plenum for practical guidelines only in order to assemblies that are selected to deliver the air identify the air band location in the wheel.

  • Page 52: Table 12 - Plenum Fan Set Screw Specifications

    Figure 27 - Supply Fan Banding For single set screw applications, tighten the The gap tolerances that are allowed between set screw to the required torque setting (Table the blower and the inlet cone for the plenum 11) using a calibrated torque wrench. For fan blowers are shown in Figure 28.

  • Page 53: Power Return Axial Flow Fans (16-25 And 30 Tons)

    Step 1: Determine the new required pitch for or a center-tapered hole where the bushing the fan blades inserts. Use the fan program in AAON ECat. Location A is with the bushing mount on air Step 2: Maintain the balance of fan inlet side of the fan.

  • Page 54: Power Return And Exhaust Axial Flow Fans (26 And 31-70 Tons)

    HUB Use the fan program in AAON ECat. Contact and RET and to replace any balancing the AAON parts department to acquire the weights in their previous locations.

  • Page 55: Figure 33 - Assembled Fan

    Mark the hub plate castings across a single joint, so the fan can be reassembled in the same orientation. Pin Groove Mark the location of any balancing weight. Balancing weight will be on the outer bolt circle, in the form of washers, and/or longer bolts, or an additional balancing nut.

  • Page 56: Adjusting Refrigerant Charge

    previous locations. Tighten bolts in a cross Units equipped with heat pump options must pattern to 9.1 Nm (6.7 ft-lbs.) of torque. be charged in heating mode to get the proper charge. After charging, operate the unit in Step 6: Install the fan in the unit. cooling mode to check for correct charge.

  • Page 57: Table 15 - Acceptable Fin & Tube Air-Cooled Condenser Coil Refrigeration Circuit Values

    Convert the pressure obtained to a saturated temperature using the appropriate refrigerant Table 16 - Acceptable Fin & Tube Air- temperature-pressure chart. Cooled Condenser Coil Refrigeration Circuit Values (Imperial) Subtract the saturated temperature from the Air-Cooled Cond./Air-Source Heat measured suction line temperature Pump...

  • Page 58: Table 19 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Metric)

    Table 19 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Metric) Cooling Mode Liquid Sub-Cooling Values(°C) Evaporator Coil Saturation Temperature (°C) Ambient (°C) 10.0 12.8 5.0 - 7.8 4.4 - 7.2 4.4 - 7.2 3.9 - 6.7 2.8 - 5.6 19.4 5.6 - 8.3 5.0 - 7.8...

  • Page 59: Adjusting Sub-Cooling And Superheat Temperatures

    Adjusting Sub-cooling and Superheat Freeze Stat Startup Temperatures Freeze Stat is an adjustable temperature The system is overcharged if the sub-cooling sensor (-23.3°C to 21.1°C [-10 to 70°F]) temperature is too high and the evaporator is mounted on the tubing of the first cooling fully loaded (low loads on the evaporator circuit and wired to de-energize all cooling result in increased sub-cooling) and the...

  • Page 60: Table 21 - R-410A Refrigerant Temperature-Pressure Chart (Metric)

    Table 21 - R-410A Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C -6.7 539.9 928.8 23.3 1473.5 38.3 2213.3 53.3 3193.8 -6.1 23.9 38.9 53.9 551.6 946.0 1496.9 2245.0 3235.8 -5.6 564.0 963.2 24.4 1521.0 39.4 2276.7 54.4 3277.9 -5.0 576.4 10.0...

  • Page 61: Table 22 - R-410A Refrigerant Temperature-Pressure Chart (Imperial)

    Table 22 – R-410A Refrigerant Temperature-Pressure Chart (Imperial) °F °F °F °F °F PSIG PSIG PSIG PSIG PSIG 78.3 134.7 213.7 321.0 463.2 80.0 137.2 217.1 325.6 469.3 81.8 139.7 220.6 330.2 475.4 83.6 142.2 224.1 334.9 481.6 85.4 144.8 227.7 339.6 487.8...

  • Page 62: Table 23 - R-454B Refrigerant Temperature-Pressure Chart (Metric)

    Table 23 - R-454B Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C 1348.0 38.3 2034.6 -6.7 23.3 53.3 484.5 843.3 2946.9 1370.0 38.9 2064.1 -6.1 23.9 53.9 495.6 859.3 2985.7 1392.2 39.4 2093.9 -5.6 506.9 875.3 24.4 54.4 3024.9 1414.6 40.0 2123.9 55.0 -5.0...

  • Page 63: Table 24 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)

    Table 24 - R-454B Refrigerant Temperature-Pressure Chart (Imperial) °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 427.4 70.3 122.3 195.5 295.1 433.0 71.9 124.6 198.7 299.4 73.5 127.0 201.9 303.7 438.7 75.2 129.3 205.2 308.0 444.5 76.8 131.7 208.5 312.5 450.3...

  • Page 64: Condenser Fan Electronically Commutated Motor (Ecm) Startup

    The fan cycling option uses a fan cycle switch AAON Condenser Head Pressure Module. to switch between one of the discrete speed See AAON literature for further information. inputs (see Table 24) on the motor thus (https://www.aaon.com/Controls) cycling between two preset speeds based upon discharge pressure of the unit.

  • Page 65: Adjustable Fan Cycling Switch Procedure

    Adjustable Fan Cycling Switch Procedure Recommended Settings The switch will come factory set to cut-in at 2.93 Mpa [425psi] (+/– 5psi) and a differential of 1.69 Mpa [155psi] (or open at 1.86 Mpa [270psi] (+/– 5psi)). Note: 5 psi = 34.5 kpa To adjust the fan cycle switch you will need a flathead screwdriver.
  • Page 66 Cut In Gauge Cut In Gauge To lower the pressure set point for the CUT To raise the pressure set point for the CUT IN IN gauge, turn the adjustable screw gauge, turn the adjustable screw counter clockwise. clockwise. Differential Differential Gauge Gauge...

  • Page 67: Operation

    Operation WARNING Unit operations must be controlled with COMPRESSOR CYCLING thermostat, or unit controller, never at the main power supply, except for servicing, 3 MINUTE MINIMUM OFF TIME emergency, or complete shutdown of the prevent motor overheating unit. compressors must cycle off for a minimum of 3 minutes.

  • Page 68: Electric Heating Operation

    Maintenance Electric Heating Operation When a call for heating (G and W1, W2, etc.) (See back of the manual for maintenance log) is made the supply blower motors and electric resistance heaters will energize. Heating is At least once each year, a trained, qualified accomplished by passing electrical current service technician must check out the unit.

  • Page 69: Power Exhaust Motor And Belt Removal

    Recommended greases are: Slide the motor mount back away from the air SHELL OIL - DOLIUM R inlet, so that the blower wheel is clear of the CHEVRON OIL - SRI No. 2 inlet. A screw driver or crowbar can be used TEXACO INC.

  • Page 70: Dx Cooling

    3. At this point the motor mount can be slid toward the wheel, and the belt can be removed. 4. Once the belt is removed the motor and mount can be lifted out. Make sure the wires to the motor are loose. DX Cooling Set unit controls to cooling mode of operation with supply fans on.

  • Page 71: E-Coated Coil Cleaning

    High velocity water from a pressure microchannel coils. AAON washer or compressed air must only E-Coated Coil Maintenance Record sheet. be used at a very low pressure to prevent fin and/or coil damages. The...

  • Page 72: Microchannel Coil Cleaning

    Enviro-Coil Cleaner: AAON PN: V82540 Continue until all coil areas on the inside of GulfClean ™ Coil Cleaner; AAON PN: the unit have been rinsed. Note: Coils must G074480 always be cleaned / back flushed, opposite of airflow to prevent impacting the dirt into Recommended Chloride Remover the coil.
  • Page 73 #2 Water Flush performance and safety and are the only This procedure can be used when the only chemicals that AAON will warrant as correct material to cause the coil to need cleaning is for cleaning microchannel coils. debris from plant material that has impinged the coil face.

  • Page 74: Options

    (See back of the manual for maintenance log) AAON testing has determined that unless a Heating Coils chemical has a neutral pH (6-8) it must not be One or two row hot water and steam heating used.

  • Page 75: Chilled Water Coil

    Table 26 - Steam Coil Connection Sizes Steam Coil Coil Model (RNA-) Connection Connection Size [mm (in)] Quantity* 54 (2 1/8) 011, 013, 016, 018, 020, 025, 030 026, 031, 040, 050, 060, 070 51 (2) MPT 055, 065, 075, 090, 105, 120, 130, 140 51 (2) MPT * In/Out Connections Table 27 - Hot Water Coil Connection Sizes...

  • Page 76: Packaged Direct Expansion (Dx) Units

    Packaged Direct Expansion (DX) Units cool down and liquid refrigerant may accumulate compressor. WARNING compressor is designed to pump refrigerant gas and damage may occur when power is COMPRESSOR CYCLING restored. 3 MINUTE MINIMUM OFF TIME If power to the unit must be off for more than prevent motor overheating...

  • Page 77: Variable Capacity Compressor Controller

    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 Figure 40 - Variable Capacity Compressor Controller When several heating and cooling units are used to condition a space all unit thermostat...

  • Page 78: Table 30 - Demand Signal Vs. Compressor Capacity Modulation

    The compressor controller modulates the modulation. The compressor controller compressor unloader solenoid in an on/off protects compressor against high pattern according to the capacity demand discharge temperature. Refer to Appendix B signal of the system. The following table for the relationship between thermistor shows the linear relationship between the temperature readings and resistance values.

  • Page 79: Evaporator Coil (11-25 And 30 Ton)

    Evaporator Coil (11-25 and 30 ton) Reinstallation Install the coil in the unit drain pan. There WARNING should be about a 0.7 centimeter (1/4”) gap between the upstream side of the coil and the Electric shock hazard. Shut off all back of the drain pan.

  • Page 80: Suction Filter (55, 65 And 75-140 Ton)

    BD filter element for the lowest possible pressure drop. Removing the suction line filter will improve the efficiency and capacity Figure 43 - Removal of a Condenser Fan of the unit. AAON installs isolation ball Assembly valves on both sides of the suction line filter...

  • Page 81: Suction Filter Removal Instructions

    so the complete system will not have to be Refrigerant-to-Water Heat Exchanger reclaimed/evacuated. Condenser water pump, condenser water piping, cooling tower or geothermal loop, Suction Filter Removal Instructions pressure gauges, strainers, piping insulation 1. Shut down operation of the unit and all components of the waterside piping 2.

  • Page 82: Freezing Water In The Heat Exchanger

    Exchanger Corrosion Resistance for Failure of the condenser as a result of more information. chemical corrosion excluded from coverage under AAON warranties and the heat exchanger manufacturer warranties. Freezing Water in the Heat Exchanger This product contains more Failure of the condenser will allow water to refrigerant-to-water heat exchangers.

  • Page 83: Water Piping

    AAON warranties and the heat WARNING exchanger manufacturer warranties. WATER PRESSURE Unit is capable of operating with Entering Water Temperatures (EWT) as low as 13.9°C...

  • Page 84: Table 32 - Standard Brazed Plate Heat Exchanger Water Connections

    Table 32 - Standard Brazed Plate Heat CAUTION Exchanger Water Connections Supply and Return WATER PIPING Model (RNA-) Connection Size [mm (in)] Follow national and local codes when 011, 013, 015, 016, 38 (1 ½) NPT installing water piping. Connections to 018, 020 the unit must incorporate vibration 025, 030...

  • Page 85: Energy Recovery Units

    Energy Recovery Units Some RN units have been equipped with an Each heat exchanger energy recovery wheel. AAON provides equipped with a refrigerant pressure options for either an aluminum energy relief device to relieve pressure recovery wheel or a polymer energy recovery...

  • Page 86: Aluminum Energy Recovery Wheel

    actual operating conditions, and to configure delivery system optimal performance. Controls variety controls 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 Figure 45 - Aluminum Energy Recovery Wheel maintenance information for the specific...

  • Page 87: Figure 46 - Aluminum Erw Purge Sector Location

    Figure 46 - Aluminum ERW Purge Sector Location Aluminum Wheel Air Seals Both non-contact sealing 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.

  • Page 88: Polymer Energy Recovery Wheel

    on the profile. In order to adjust their position below, presenting proper way of replacing unscrew them and place properly. segments or increasing belt tension. Aluminum Wheel Purge Sector 1. Unclip the belt using pliers. Grab the Purge sectors are maintenance-free but their protruding tongue of the segment to condition, rigidness and cleanliness must be remove and twist it to release the...

  • Page 89: Figure 47 - Polymer Energy Recovery Wheel

    warm, moist air stream to the cooler and/or drier air stream. The initial setup and servicing of the energy recovery wheel is very important to maintain proper operation efficiency and building occupant comfort. Normal maintenance requires periodic inspection of filters, the cassette wheel, drive belts, air seals, wheel drive motor, and its electrical connections.
  • Page 90 2. Adjust purge sector to the specified Polymer Wheel Air Seal Adjustments angle. Pile type air seals across both sides of the energy wheel diameter are factory adjusted to provide close clearance between the air seal and wheel. Racking of the unit or cassette during installation, and/or mounting of the unit on a non-level support or in other than the factory orientation can change seal...
  • Page 91 to provide slip fit clearance when the wheel Frame Bearing beams shown is rotated by hand. racked Confirm that the wheel rotates freely. Apply power to the unit and confirm rotation. Wheel Visually inspect the belt and ensure the belt is tracking near the center of the rim.
  • Page 92 With hands and objects away from moving parts, activate unit and confirm wheel rotation. Wheel rotates clockwise (as viewed from the pulley side). If wheel has difficulty starting, turn power off and inspect for excessive interference between the wheel surface and each of the four (4) diameter seals.

  • Page 93: Figure 48 - Wheel Segment Removal Pattern

    Polymer Wheel Air Seals Polymer Wheel Service Four adjustable diameter seals are provided CAUTION on each cassette to minimize transfer of air between the counter flowing airstreams. Disconnect electrical power before servicing energy recovery cassette. To adjust diameter seals, loosen diameter seal Always keep hands...
  • Page 94 Segment Installation 3. Holding segment by the two outer corners, press the segment towards the Segment Retainer center of the wheel and inwards against the spoke flanges. If hand pressure does To install wheel segments follow the steps not fully seat the segment, insert the flat below.

  • Page 95: Energy Recovery Wheel General Cleaning

    4. While supporting weight of drive motor 5. Loop the trailing end of the belt over the in one hand, loosen and remove (4) shaft (belt is partially through the mounting bolts. opening). 5. Install replacement motor with hardware 6. Reinstall the bearing onto the wheel shaft, kit supplied.

  • Page 96: Table 33 - Energy Recovery Wheel Cleaning Frequency

    of the Air Seals and Wheel Drive Class 3 air has significant contaminant Components. concentration and significant offensive odor or sensory-irritation intensity. Cleaning the energy transfer media will help Class 4 air has highly objectionable fumes or maintain optimal performance. gases and potentially contains dangerous frequency of cleaning is largely dependent on particles, bio-aerosols, or gases at a...
  • Page 97 ventilation of machine shop areas for CAUTION example, annual washing of energy transfer may be necessary to maintain latent transfer Disconnect electrical power before efficiency. Proper cleaning of the energy servicing energy recovery cassette. recovery wheel will restore latent Always keep hands away...

  • Page 98: Energy Recovery Wheel Defrost Timer Setting

    Soak in the solution until grease and tar deposits are loosened (Note: some staining of the desiccant may remain and is not harmful to performance). Before removing, rapidly run finger across surface of segment to separate polymer strips for better cleaning action.

  • Page 99: Gas Or Electric Heating

    Gas or Electric Heating Should overheating occur with a gas heat The unit is designed to heat a given amount exchanger, or the gas supply fail to shut off, of air while operating. If this amount of air is shut off the manual gas valve to the furnace greatly reduced, approximately 1/3 during before shutting off the electrical supply.

  • Page 100: Electric Preheat

    Electric Preheat Flash Code LED Screen Controller Buttons Figure 51 - Preheat Controller The electric preheat controller is factory 4. RESETset - "Reset" air temperature (°F) installed within the preheat cabinet. The control setpoint. following details are for EHC1 version 1.10 of the preheat controller.

  • Page 101: System Setting Screens

    8. Stage - Current operating stage 1-6. 1. StartDly - Seconds of delay after the MOD - Modulation rate % being applied 'Enable' call before heating starts. This is to stage one heat strip SCR. to allow the Supply Fan to come up to speed.

  • Page 102: Led Flash Alarm Codes

    4. LATset - Leaving air temperature LED Flash Alarm Codes setpoint. Range = 35°F-80°F, and the The flashing red LED will be to the right of default is 50°F. the screen. The number of blinks is described below. The LCD screen will also display the screens.

  • Page 103: Operation

    interface on the preheat controller. Outside air temperature sensors and preheat discharge supply air temperature sensors are factory installed and wired to the preheat controller. Operation Electric preheat has maximum operating Controller receives 24VAC preheat enable outside air temperature of 15.6°C (60°F) and maximum preheat discharge...

  • Page 104: Table 36 -11 - 70 Ton Gas Connections

    Above 609.6 m (2,000 ft)., the input rate is adjusted 4% for every 304.8 m Figure 52 - RN Series Gas Heat Exchanger (1,000 ft). Table 37 - Natural Gas (m...

  • Page 105: Piping Sizing Examples

    Table 38 - Propane (kW [kBtu/hr]) Maximum Piping Capacities Specific Gravity = 1.52, Supply Pressure = 20.6 mmHg (11” w.c.), Pressure Drop, .93 mmHg (0.5” w.c). Pipe Size Length of Pipe (m [ft]) (mm [in.]) 6.1 (20) 15.2 (50) 30.4 (100). 45.6 (150) 60.8 (200) 12.7 (1/2”)

  • Page 106: Piping Supports

    Every 2.4 m evaporator condensate drain, if code allows. 44.5 or Larger Every 3 m (Horizontal) AAON gas fired heat exchangers are 31.8 or Larger Every Floor designed to be non-condensing. These heat exchangers are mounted downstream of the Table 40 – Gas Piping Supports (Imperial) cooling coils.
  • Page 107 freezing for multiple consecutive days) the temperatures above dew point (about 54.4°C internal and external drain lines for the unit [130⁰F]) which can cause condensation in the will need to be heat traced to prevent heat exchanger. freezing. Heat traced internal drain lines are required and a factory provided standard Staged or modulated heat exchangers may feature on the condensate drain with the high...

  • Page 108: Figure 53 - Example 11-50, 60 & 70 Ton Through The Base Gas Piping

    Figure 53 - Example 11-50, 60 & 70 ton through the Base Gas Piping...

  • Page 109: Figure 54 - Example 55, 65 And 75-140 Ton For Across The Roof Gas Piping

    Figure 54 - Example 75-140 ton for across the Roof Gas Piping Note: There will be two gas connections, one on each side of the unit...

  • Page 110: Leak Testing

    Leak Testing DANGER All components of gas supply system, including manual shut off valves and the Do not use open flame or other source piping in the interior of the unit, must be leak of ignition for leak testing. Fire or tested.

  • Page 111: Figure 55 - Gas Heater Instructions

    Gas Heater Operating Instructions Figure 55 - Gas Heater Instructions...

  • Page 112: Gas Heating Maintenance

    Cleaning shall only be done by a to the heating mode of operation. qualified service agency and only after consultation with AAON service The combustion ventilation motor will representative. enable. The control will automatically supply energy to the igniter and the gas valve after If induced draft blower/motor assembly has the heating call is made.

  • Page 113: Gas Heat Exchanger Removal

    Gas Heat Exchanger Removal DANGER WARNING LEAK CHECK GAS PIPE Electric shock hazard. Shut off all The gas pipe in the unit shall be electrical power to the unit to avoid checked for leaks before operation shock hazard or injury from rotating and startup.

  • Page 114: Phase And Brownout Protection Module

    Phase and Brownout Protection Module the setpoint parameters and the left arrow to backup if needed. When each parameter is displayed use the up/down keys to change and set the parameter. After adjustments are made or if no adjustments are made it will take 2 to 4 minutes before the DPM energizes the output relay unless there is an out of tolerance issue with the incoming line voltage.
  • Page 115 Average Voltage Screen Screens VAvg Manufacturer’s Screen R-K Electronics DPM v0.0.00 Default – the default screen shows the real time voltage detected in each of the 3 phases: A-B B-C C-A Voltage Selection Screen (Vertical Format) Default = 460V, 3Ø 200, 1Ø;...

  • Page 116: Filter Replacement

    (RAB = Return Air Bypass, PE = Power Exhaust, PR = Power Return) Table 41 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Pre Filters Feature 9A Quantity / Size...

  • Page 117: Table 43 - Rn Series C Horizontal 11, 13, 16-25 And 30 Ton Energy Recovery Wheel Filters

    Table 43 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Energy Recovery Wheel Filters Feature 4C Quantity / Size Type With Energy Recovery Wheel Exhaust Air Filters J,K,N,P OA - 6 / 20” x 16” x 2”...

  • Page 118: Table 46 - Rn Series D Cabinet 50, 60, And 70 Ton Pre Filters

    Table 46 - RN Series D Cabinet 50, 60, and 70 ton Pre Filters Feature 9A Quantity / Size Type No Pre Filters 24 / 12” x 24” x 2” B,C,D Pleated MERV 8 with RAB, Feature 8 = G,J,L 16 / 12”...

  • Page 119: Table 49 - 55, 65, And 75 Ton Unit Filters

    21 / 20” x 24” x 4” & Pleated, MERV 13 7 / 16” x 20” x 4” Pleated, MERV 14 Table 51 - RN Series D Cabinet 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters Feature 4C Quantity / Size Type...

  • Page 120: Table 52 - 55, 65, And 75-140 Ton Energy Recovery Wheel Filters

    Table 52 - 55, 65, and 75-140 ton Energy Recovery Wheel Filters Feature 4C Quantity / Size Type 10 / 24” x 24” x 2” With Energy Recovery Wheel Exhaust Air Filters, Feature 6A - D, F, G, H, J, Q, R, S, T F, G, H OA - 10 / 24”...

  • Page 121: Replacement Parts

    Replacement Parts Parts for AAON equipment may be obtained from your local AAON representative. Reference the unit serial number and part number when ordering parts. AAON Warranty, Service and Parts Department 2425 S. Yukon Ave. Tulsa, OK 74107 Ph: 918-382-6450 techsupport@aaon.com...

  • Page 124: Appendix A - Heat Exchanger Corrosion Resistance

    Appendix A - Heat Exchanger Corrosion Resistance Corrosion Resistance of Copper and Stainless Steel in Brazed Plate Heat Exchangers - Points to Measure and Check in a Water Analysis The resistance guide provides the corrosion resistance of stainless steel type AISI 316 and pure Copper (99.9%) in water, to a number of important chemical factors.
  • Page 125 Water Concentration Time Limits - AISI Copper Nickel Containing (mg/l or ppm) Analyze Before Alloy Alloy Total Hardness 4.0-8.5 No Limit (°dH) < 100 Nitrate (NO No Limit > 100 < 0.2 Iron (Fe) No Limit > 0.2 < 0.2 Aluminum (Al) No Limit >...

  • Page 126: Appendix B - Thermistor Temperature Vs. Resistance Values

    Appendix B - Thermistor Temperature vs. Resistance Values Deg C Deg F Resistance (kOhms) Deg C Deg F Resistance (kOhms) 2889.6 15.07 2087.22 12.73 1522.20 10.79 1121.44 9.20 834.72 7.87 627.28 6.77 475.74 5.85 363.99 5.09 280.82 4.45 218.41 3.87 171.17 3.35 135.14...

  • Page 127: Rna Series Startup Form

    RNA Series Startup Form Date:______________ Job Name:___________________________________________________________________ Address:_____________________________________________________________________ ___________________________________________________________________________ Model Number:_______________________________________________________________ Serial Number:__________________________________________ Tag:_______________ Startup Contractor:____________________________________________________________ Address:_______________________________________________ Phone:_____________ ______________________________________________________ Pre Startup Checklist Installing contractor must verify the following items. 1. Is there any visible shipping damage? 2. Is the unit level? 3.
  • Page 128 Energy Recovery Wheel Assembly Wheel(s) Spin Freely Check Rotation FLA____________ Number Power Return/Exhaust Assembly Alignment Check Rotation Nameplate Amps________ Number Outside Air/Economizer Dampers Operation Check Damper Actuator Type: Economizer Changeover Type and Operations: Damper Wiring Check Gears Check Ambient Temperature Ambient Dry Bulb Temperature ______°C/°F Ambient Wet Bulb Temperature ______°C/°F Unit Configuration...
  • Page 129 Refrigeration System 1 – Cooling Mode Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 2 – Cooling Mode Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 3 – Cooling Mode Saturated Line Pressure Sub-cooling Superheat...
  • Page 130 Refrigeration System 4 – Heating Mode (Heat Pump only) Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Air-Cooled Condenser Alignment Check Rotation Nameplate Amps________ Number Water/Glycol System 1. Has the entire system been flushed and pressure checked? 2. Has the entire system been filled with fluid? 3.

  • Page 131: Maintenance Log

    This log must be kept with the unit. It is the responsibility of the owner and/or maintenance/service contractor to document any service, repair or adjustments. AAON Service and Warranty Departments are available to advise and provide phone help for proper operation and replacement parts.

  • Page 132: Maintenance Log (E-Coated Coil)

    Maintenance Log (E-Coated Coil)

  • Page 133: Literature Change History

    Literature Change History January 2022 New Manual for Next Gen RN Series June 2022 Updated the descriptions in Model Option A1 and added option E = 4-circuit variable capacity scroll compressor. Added Model Option A2 option J = Air-Source Heat Pump and L=Water- Source Heat Pump.

  • Page 136: V03830 · Rev. A · 231215

    Parts: For replacement parts please contact your local AAON Representative. It is the intent of AAON to provide accurate and current product information. However, in the interest of product improvement, AAON reserves the right to change pricing, specifications, and/or design of its...

This manual is also suitable for:

RncRnd

Table of Contents

Save PDF