hit counter script
AAON RN Series Installation Operation & Maintenance
  1. Manuals
  2. Brands
  3. AAON Manuals
  4. Heating System
  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,
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
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.
(11-70 tons)
WARNING

Advertisement

Table of Contents
loading

Related Manuals for AAON RN Series

Summary of Contents for AAON RN Series

  • Page 1 RN Series Next Gen RN (11-70 tons) Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units Installation, Operation, & Maintenance 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 .......................27 Codes and Ordinances......................27 Receiving Unit........................28 Storage ..........................28 Wiring Diagrams ........................28 Installation ..........................29...
  • Page 4 Supply Fans........................59 Power Exhaust Motor and Belt Removal ................60 DX Cooling ........................61 Condensate Drain Pans .......................61 Brazed Plate Heat Exchanger Cleaning ................61 E-Coated Coil Cleaning ......................62 Microchannel Coil Cleaning....................63 Options ..........................65 Heating Coils........................65 Chilled Water Coil ......................66 Packaged Direct Expansion (DX) Units ................67 Variable Capacity Compressor Controller ................68 Evaporator Coil (11-25 and 30 ton) ..................70 Condenser Fans (11-25 and 30 ton) ..................70...
  • Page 5 Table 30 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Unit Filters ........ 104 Table 31 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Energy Recovery Wheel Filters .. 105 Table 32 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Final Filters ....... 105 Table 33 - RN Series D Cabinet 26, 31, and 40 ton Pre Filters ..........
  • Page 6 Figure 2 - RN Series C Cabinet, ....................29 Figure 3 - RN Series D Cabinet, ....................30 Figure 4 - RN Series 26, 31-50, 60, and 70 ton Unit Isolator Locations ........31 Figure 5 - Steel Mounting ......................31 Figure 6 - Forklifting an RN Series C Cabinet, 11, 13 and 16-30 tons ........32 Figure 7 - Lifting Details of a 11-25 and 30 ton Standard or Power Exhaust Unit ......33...
  • Page 7 Figure 45 - Temperature Dial ....................88 Figure 46 - Preheat Controller ....................90 Figure 47 - RN Series Gas Heat Exchanger ................94 Figure 48 - Example 11-50, 60 & 70 ton through the Base Gas Piping ........97 Figure 49 - Gas Heater Instructions ..................99 Figure 50 - Gas Heat Exchanger....................

  • 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 Failure of the condenser as a result of 2. Use only with type of the gas approved chemical corrosion is excluded from for the furnace. Refer to the furnace rating coverage under AAON Inc. warranties plate. heat exchanger manufacturer’s warranties.
  • Page 14 6. The supply and return air ducts must be 8. Every unit has a unique equipment derived from the same space. It is nameplate with electrical, operational, recommended ducts be provided with and unit clearance specifications. Always access panels to allow inspection for duct refer to the unit nameplate for specific tightness.

  • 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 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 - 0 A...
  • Page 18 RN Series - Next Gen RN Feature String Nomenclature G 0 K - E 0 RN A - 030 - C - 0 - 3 - C A B 0 A - 0 0 0 0 0 : 0 1 - 0 A...
  • Page 19 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...
  • 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...
  • 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 - C A - 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: General Information

    These units must not be used for heating or cooling at any time during Codes and Ordinances any phase of construction. Very low RN Series units have been tested and return temperatures, harmful certified, by ETL, in accordance with UL vapors, and misplacement of the Safety Standard 1995/CSA C22.2 No.

  • Page 28: Receiving Unit

    B52. All appliances must be electrically grounded in accordance with local codes, or warranty. Contact the AAON Warranty in the absence of local codes, the current Department for assistance with handling National Electric Code, ANSI/NFPA 70 or...

  • Page 29: Installation

    Unit must also be installed so that the flow of combustion intake air is not Figure 2 - RN Series C Cabinet, obstructed from reaching the furnace. 11, 13, 16-25 and 30 Vent opening must not be blocked by snow.

  • Page 30: Setting The Curb

    Right Side Front Be careful to install the provided neoprene Figure 3 - RN Series D Cabinet, isolator according to the following figure 26, 31-50, 60 and 70 tons prior to setting the unit on the curb. Setting the Curb...

  • Page 31: Figure 4 - Rn Series 26, 31-50, 60, And 70 Ton Unit Isolator Locations

    Figure 4 - RN Series 26, 31-50, 60, and 70 ton Unit Isolator Locations...

  • Page 32: Forklifting The Unit (11, 13 And 16-30 Ton)

    (right) side. Forks Figure 6 - Forklifting an RN Series C Cabinet, 11, 13 and 16-30 tons Before lifting unit, be sure that all shipping Lifting the Unit If cables or chains are used to hoist the unit material has been removed from unit.

  • Page 33: Figure 7 - 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 7 - Lifting Details of a 11-25 and 30 ton Standard or Power Exhaust Unit Figure 8 - Lifting Details of a 11-25 and 30 ton Energy Recovery Wheel or Power Return Unit...

  • Page 34: Figure 9 - Lifting Details Of A 26, 31-50, 60 And 70 Ton Unit

    Figure 9 - Lifting Details of a 26, 31-50, 60 and 70 ton Unit...

  • Page 35: Duct Connection

    Duct Connection CAUTION There must be a minimum of a 12” straight duct off of the supply duct with no size Do not drill or punch holes in the base reduction and then a limitation of no more of the unit, from inside the unit or from than a 45...

  • Page 36: 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 37: Figure 11 - Solid Bottom Seismic Curb With Filters

    Figure 11 - Solid Bottom Seismic Curb with Filters...

  • Page 38: Figure 12 - Seismic Solid Bottom Curb Without Filters Cross Section

    Figure 12 - Seismic Solid Bottom Curb without Filters Cross Section Figure 13 - Seismic Solid Bottom Curb without Filters Detail A Figure 14 - Seismic Solid Bottom Curb without Filters Detail B Figure 15 - Seismic Rigid Mount Curb...

  • Page 39: Outside Air Rain Hood

    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. 11, 13 and 16-30 ton Units Remove the two screws at the bottom of the rain hood that secure it in the shipping position.

  • Page 40: Metal Mesh Filters

    Metal Mesh Filters Metal mesh outside air filters require Clips which hold the metal mesh filters in the installation of the filter rack on the intake of filter rack face outward. the rain hood. Figure 19 - Rain Hood with Metal Mesh Filter Rack Installation Electrical Verify the unit nameplate agrees with power supply.

  • Page 41: Figure 20 - Unit Utility Entry

    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. WARNING Electric shock hazard. Before attempting to perform any installation, service, or maintenance, shut off all Figure 20 - Unit Utility Entry electrical power to the unit at the disconnect switches.
  • Page 42 Note: All units are factory wired for 208V, Check voltage imbalance at the unit 230V, 380V, 460V, 575V. disconnect switch and at the compressor transformer configuration must be checked terminal. Contact your local power company by a qualified technician prior to service, for line voltage corrections.

  • Page 43: Variable Speed Compressors

    Variable Speed Compressors minimum of 21 VAC. To assure proper Variable speed compressors with VFD speed wiring use the following chart to determine control are available on most size units. the allowable wiring distances. Variable speed compressors must not be operated outside the factory determined Table 5 - Control Wiring turndown ratio or frequency range.

  • Page 44: Draw-Through Coils

    connections, one on the left side of the unit Draw-Through Coils 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.

  • Page 45: Startup

    Startup Table 6 - Draw-Through Drain Trap (See back of the manual for startup form.) Dimensions Draw-Through WARNING Drain Pan Pressure Trap Dimensions Negative Static (inches of water) (inch) (inch) Improper installation, adjustment, -0.50 1.50 0.75 alteration, service or maintenance can -1.00 2.00 1.00...

  • Page 46: Supply Fans

    Use fan program in AAON ECat to determine Supply Fans RN Series units are equipped with direct the new band size for the required cfm and drive backward curved plenum static pressure. assemblies that are selected to deliver the air...

  • Page 47: Table 7 - Plenum Fan Set Screw Specifications

    Figure 23 - Supply Fan Banding For single set screw applications, tighten the set screw to the required torque setting (Table 7) using a calibrated torque wrench. For double set screw applications, tighten one set screw to half of the required torque setting (Table 7) using a calibrated torque wrench.

  • Page 48: Power Return Axial Flow Fans (16-25 And 30 Tons)

    Step 1: Determine the new required pitch for inlet side of the fan. the fan blades Use the fan program in AAON ECat. Location B is with the bushing mount on air discharge side of the fan. Step 2: Maintain the balance of fan...

  • Page 49: 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 50: Figure 29 - Assembled Fan

    Mark the location of any balancing weight. Balancing weight will be on the outer bolt circle, in the form of washers, and/or longer Pin Groove bolts, or an additional balancing nut. Number the blades and blade sockets, so that they can be replaced into their original positions.

  • Page 51: Adjusting Refrigerant Charge

    previous locations. Tighten bolts in a cross Units equipped with heat pump options must pattern to 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 52: Table 10 - Acceptable Fin & Tube Air-Cooled Condenser Coil Refrigeration Circuit Values

    Convert the pressure obtained to a saturated Table 10 - Acceptable Fin & Tube Air- temperature using the appropriate refrigerant Cooled Condenser Coil Refrigeration Circuit temperature-pressure chart. Values Subtract the saturated temperature from the Air-Cooled Cond./Air-Source Heat measured suction line temperature Pump determine the evaporator superheat.

  • Page 53: Adjusting Sub-Cooling And Superheat Temperatures

    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 within temperature range as shown in the table above (high superheat results in increased sub-cooling).

  • Page 54: Table 13 - R-410A Refrigerant Temperature-Pressure Chart

    Table 13 - R-410A Refrigerant Temperature-Pressure Chart PSIG PSIG PSIG PSIG PSIG (F) R-410A (F) R-410A (F) R-410A (F) R-410A (F) R-410A 78.3 142.2 234.9 364.1 540.1 80.0 144.8 238.6 369.1 547.0 81.8 147.4 242.3 374.2 553.9 83.6 150.1 246.0 379.4 560.9 85.4...

  • Page 55: 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 14) on the motor thus (https://www.aaon.com/Controls) cycling between two preset speeds based upon discharge pressure of the unit.

  • Page 56: Adjustable Fan Cycling Switch Procedure

    Adjustable Fan Cycling Switch Procedure Recommended Settings The switch will come factory set to cut-in at 425psi (+/– 5psi) and a differential of 155psi (or open at 270psi (+/– 5psi)). To adjust the fan cycle switch you will need a flathead screwdriver.
  • Page 57 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 58: 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 59: Electric Heating Operation

    Electric Heating Operation Maintenance 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 60: 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 61: 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 62: E-Coated Coil Cleaning

    AAON be used at a very low pressure to E-Coated Coil Maintenance Record sheet. prevent fin and/or coil damages. The force of the water or air jet may bend...

  • Page 63: Microchannel Coil Cleaning

    Enviro-Coil Cleaner: AAON PN: V82540 GulfClean ™ Coil Cleaner; AAON PN: Continue until all coil areas on the inside of the unit have been rinsed. Note: Coils must G074480 always be cleaned / back flushed, opposite...
  • Page 64 AAON will warrant as correct the coil face. for cleaning microchannel coils. 1. Rinse the coil completely with water.

  • Page 65: Options

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

  • Page 66: Chilled Water Coil

    Table 15 - Steam Coil Connection Sizes Steam Coil Coil Model (RNA-) Connection Connection Size Quantity* 2 1/8” 011, 013, 016, 018, 020, 025, 030 2” MPT 026, 031, 040, 050, 060, 070 * In/Out Connections Table 16 - Hot Water Coil Connection Sizes Coil Hot Water Coil Model (RNA-)

  • Page 67: Packaged Direct Expansion (Dx) Units

    cool down and liquid refrigerant may Packaged Direct Expansion (DX) Units 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 68: Variable Capacity Compressor Controller

    CAUTION Polyolester (POE) and Polyvinylether (PVE) oils are two types of lubricants used in hydrofluorocarbon (HFC) refrigeration systems. Refer to the compressor label for the proper compressor lubricant type. Note: Multiple Units with Multiple Thermostats Figure 36 - Variable Capacity Compressor Controller When several heating and cooling units are used to condition a space all unit thermostat...

  • Page 69: Table 18 - Demand Signal Vs. Compressor Capacity Modulation

    demand signal and compressor capacity modulation. compressor controller protects compressor against high discharge temperature. Refer to Appendix B for the relationship between thermistor temperature readings and resistance values. Table 18 - Demand Signal vs. Compressor Capacity Modulation Demand Time % Compressor Loaded % Unloaded % Time Loaded...

  • Page 70: Evaporator Coil (11-25 And 30 Ton)

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

  • Page 71: Refrigerant-To-Water Heat Exchanger

    Reinstallation WARNING Set the condenser fan, motor and orifice assembly back into the condenser assembly Improper installation, adjustment, with the motor wires on the side closest to the alteration, service, or maintenance control panel. can cause property damage, personal injury, or loss of life. Startup and Attach the orifice to the condenser assembly service must be performed by a using all of the points where screws were...

  • Page 72: Freezing Water In The Heat Exchanger

    A coverage under AAON warranties and the refrigerant-to-water heat exchanger contains heat exchanger manufacturer warranties. refrigerant in one passage and water in another passage. Water is subject to freezing Failure of the condenser will allow water to at 32°F.

  • Page 73: Water Piping

    WARNING under AAON warranties and the heat exchanger manufacturer warranties. WATER PRESSURE Unit is capable of operating with Entering Prior to connection of condensing Water Temperatures (EWT) as low as 57°F,...

  • Page 74: Table 20 - Standard Brazed Plate Heat Exchanger Water Connections

    Table 20 - Standard Brazed Plate Heat CAUTION Exchanger Water Connections Supply and Return Model (RNA-) WATER PIPING Connection Size 011, 013, 015, 016, 1 1/2” NPT Follow national and local codes when 018, 020 installing water piping. Connections to 2”...

  • Page 75: Energy Recovery Units

    Energy Recovery Units CAUTION Some RN units have been equipped with an energy recovery wheel. AAON provides options for either an aluminum energy Each heat exchanger recovery wheel or a polymer energy recovery equipped with a refrigerant pressure wheel. Follow the instructions for the...

  • Page 76: Aluminum Energy Recovery Wheel

    delivery system optimal performance. 1. Monolith energy recovery wheel 2. Purge Sector 3. Profile Controls variety controls electrical 4. Motor accessories may be provided with the 5. Brush Plate equipment. Identify the controls on each unit 6. Rotor Hub by consulting appropriate submittal, or order 7.

  • Page 77: Figure 41 - Aluminum Erw Purge Sector Location

    Figure 41 - 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 78: Polymer Energy Recovery Wheel

    cleaning properties and it will be necessary to individual segments is enough to restore replace them or simply change their position functionality. Please follow the instructions on the profile. In order to adjust their position below, presenting proper way of replacing unscrew them and place properly.

  • Page 79: Figure 42 - 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 80 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 81 to provide slip fit clearance when the wheel Bearing beams shown Frame racked is rotated by hand. 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 82 wheel rotation. Wheel rotates clockwise Polymer Wheel Routine Maintenance and (as viewed from the pulley side). Handling If wheel has difficulty starting, turn Handle cassettes with care. Lift all cassettes power off and inspect for excessive by the bearing support beam. Holes are interference between the wheel surface provided on both sides of the bearing support and each of the four (4) diameter seals.

  • Page 83: Figure 43 - Wheel Segment Removal Pattern

    Adjust seals towards wheel surface until a removing opposing segments for even weight slight friction on the feeler gauge (paper) is distribution. Failure to maintain control of detected when gauge is moved along the the wheel rotation while removing length of the spoke. Retighten adjusting installing all segments could cause severe screws and recheck clearance with “feeler”...
  • Page 84 To install wheel segments follow the steps the third segment is installed. Rotate the below. Reverse procedure for segment wheel 180º again to install the fourth removal. segment opposite the third. Repeat this sequence with the remaining four Disconnect power from the wheel. segments.

  • Page 85: Energy Recovery Wheel General Cleaning

    Note: Slight hand pressure against wheel rim will lift weight of wheel from inner race of bearing to assist bearing removal and installation. CAUTION Protect hands and belt from possible sharp edges of hole in Bearing Support Beam. 5. Loop the trailing end of the belt over the shaft (belt is partially through the Belt Replacement...

  • Page 86: Table 21 - Energy Recovery Wheel Cleaning Frequency

    Table 21 - Energy Recovery Wheel Cleaning Frequency Class of Air Examples Cleaning Frequency  Offices  Classrooms Class 1 Every 8-10 years  Assembly rooms Clean Air  Churches  Restrooms  Swimming pools Class 2  Dining rooms Moderately Clean Every 4-6 years ...

  • Page 87: Energy Recovery Wheel Defrost Timer Setting

    may be necessary to maintain latent transfer to performance). Before removing, rapidly efficiency. Proper cleaning of the energy run finger across surface of segment to recovery wheel will restore latent separate polymer strips for better cleaning effectiveness to near original performance. action.

  • Page 88: Gas Or Electric Heating

    Gas or Electric Heating The unit is designed to heat a given amount of air while operating. If this amount of air is greatly reduced, approximately 1/3 during the heating season, the gas heat exchanger or electric heating coil may overheat, and may cut the burner or heater off entirely by action of the safety high temperature limit devices which are factory mounted at the heat...

  • Page 89: Table 22 - Electric And Gas Heating Capacities

    Table 22 - Electric and Gas Heating Capacities Gas Heat Electric Heat Input Output Capacity RN Unit Model Capacity Capacity Size Option B3 kW (230V, 380V 460V, (208V) 575V) 1 = Heat 1 270.0 218.7 15.0 20.0 Horizontal 2 = Heat 2 405.0 328.1 30.0...

  • Page 90: Electric Preheat

    Electric Preheat Flash Code LED Screen Controller Buttons Figure 46 - 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 91: 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 92: 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 93: Operation

    9 = Short or overload on the 0-10VDC controlled and staged electric preheat. Both analog signal output setpoints are set with push button LCD 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.

  • Page 94: Table 24 -11, 13, 16-25 And 30 Ton Gas Connections

    Option Quantity Size 1-1/2” 1200 Figure 47 - RN Series Gas Heat Exchanger Table 26 - Natural Gas (ft /hr) Maximum Piping Capacities Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.5” w.c. Length of Pipe...

  • Page 95: Piping Sizing Examples

    manifold pressure of 3.5” w.c. for natural gas, Do not use gas piping smaller than unit gas or 10.5” w.c. for propane. connections. Natural gas pipe runs longer than 20 feet and propane gas pipe runs longer than 50 feet may require a larger supply pipe CAUTION than the unit connection size.

  • Page 96: Additional Gas Piping Considerations

    (below freezing for multiple consecutive days) the AAON gas fired heat exchangers are internal and external drain lines for the unit designed to be non-condensing. These heat will need to be heat traced to prevent exchangers are mounted downstream of the freezing.

  • Page 97: Figure 48 - Example 11-50, 60 & 70 Ton Through The Base Gas Piping

    condensate neutralizer vessel connecting tubing can be added to the equipment if required. For below freezing ambient temperature applications neutralizer, connecting tubing and drain lines will require heat tracing prevent condensate freezing. These components are the responsibility of the installer. Figure 48 - Example 11-50, 60 &...

  • Page 98: Leak Testing

    Leak Testing All components of gas supply system, CAUTION including manual shut off valves and the piping in the interior of the unit, shall be leak Some soaps used for leak detection tested with a soap solution before operating can be corrosive to certain metals. the appliance and at least on an annual basis Rinse piping thoroughly after leak test thereafter.

  • Page 99: Gas Heater Operating Instructions

    Gas Heater Operating Instructions Figure 49 - Gas Heater Instructions...

  • Page 100: 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.

  • Page 101: Figure 50 - Gas Heat Exchanger

    Attach the heat exchanger to the bulkhead DANGER using the holes around the perimeter. LEAK CHECK GAS PIPE Connect flex gas lines to the piping on the heat exchanger. If flexible gas piping in the The gas pipe in the unit shall be unit must be replaced connectors cannot be checked for leaks before startup.

  • Page 102: Phase And Brownout Protection Module

    the setpoint parameters and the left arrow to Phase and Brownout Protection Module 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 103 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 104: Filter Replacement

    (RAB = Return Air Bypass, PE = Power Exhaust, PR = Power Return) Table 29 - RN Series C Horizontal 11, 13, 16-25 and 30 ton Pre Filters Feature 9A Quantity / Size...

  • Page 105: Table 31 - Rn Series C Horizontal 11, 13, 16-25 And 30 Ton Energy Recovery Wheel Filters

    Table 31 - 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 106: Table 34 - Rn Series D Cabinet 50, 60, And 70 Ton Pre Filters

    Table 34 - 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 with RAB, Feature 8 = G,J,L Pleated MERV 8 16 / 12”...

  • Page 107: Replacement Parts

    Table 37 - RN Series D Cabinet 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters Feature 4C Quantity / Size Type With Energy Recovery Wheel Exhaust Air Filters J,K,N,P OA - 8 / 24” x 18” x 2”...

  • Page 108: 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 109 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 110: 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 111: 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 112 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 ________°F Ambient Wet Bulb Temperature ________°F Unit Configuration...
  • Page 113 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 114 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 115: 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 116: Maintenance Log (E-Coated Coil)

    Maintenance Log (E-Coated Coil)

  • Page 117: Literature Change History

    Literature Change History January 2022 New Manual for Next Gen RN Series...
  • Page 120 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:

Next gen rnRna-011Rna-013Rna-016Rna-018Rna-020 ... Show all

Table of Contents

Save PDF