AAON RN Series Installation Operation & Maintenance
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AAON RN Series Installation Operation & Maintenance

AAON RN Series Installation Operation & Maintenance

Packaged rooftop units & outdoor air handling units
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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.
Packaged Rooftop Units
& 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
E Cabinet
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.
(75-140 tons)

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Summary of Contents for AAON RN Series

  • Page 1 RN Series E Cabinet (75-140 tons) Packaged Rooftop Units & 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 E Cabinet Features and Options Introduction ..........7 Safety .............................. 8 RN Series E Cabinet Feature String Nomenclature ..............16 General Information ........................27 Receiving Unit .......................... 28 Codes and Ordinances ......................28 Storage ............................
  • Page 4 ............................... 93 Appendix A - Heat Exchanger Corrosion Resistance ..............94 Appendix B - Thermistor Temperature vs. Resistance Values ............. 96 RN Series E Cabinet Startup Form ....................97 Maintenance Log ........................101 Maintenance Log (E-Coated Coil) ....................103 Literature Change History......................104...
  • Page 5 Table 1 - RN Series E Cabinet Unit Clearances ................30 Table 2 - Nameplate Voltage Markings & Tolerances ..............34 Table 3 - RN Series E Cabinet 75-145 ton Dual Point Power Methods ........35 Table 4 – 35 KAIC Fuse Sizing ....................37 Table 5 - RN Series E Cabinet Variable Speed Compressor VFD Frequency Range ....
  • Page 6 Figure 18 - Defrost Timer ......................75 Figure 19 - Temperature Dial ....................... 75 Figure 20 - RN Series E Cabinet Gas Heat Exchanger ..............76 Figure 21 - Example and 75-140 ton for across the Roof Gas Piping .......... 81 Figure 22 - Gas Heater Instructions ....................

  • Page 7: Aaon ® Rn Series E Cabinet Features And Options Introduction

    ® AAON RN Series E Cabinet Features and Options Introduction Energy Efficiency Safety Continued Direct Drive Backward Curved Plenum Supply/Return Firestats • • Supply Fans Variable Speed Scroll Compressors Installation and Maintenance • Airside Economizers Clogged Filter Switch • •...

  • Page 8: 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 9 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 10 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 code requirements.
  • Page 11 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 12 Failure of the condenser as a result of motors/compressors have adjustable chemical corrosion is excluded from overload settings. These are set by coverage under AAON Inc. warranties the AAON factory for the protection of heat exchanger these motors/compressors and must manufacturer’s warranties.
  • Page 13 WARNING WARNING Only auxiliary devices approved by manufacturer or declared suitable with This appliance contains a flammable the refrigerant may be installed in refrigerant. Minimum floor area on nameplate is based on factory charge ductwork. at a ceiling/release height of 2.2 m (7.2 ft).
  • Page 14 WARNING WARNING Ensure that there are no live electrical Do not use torch or other potential components or wiring exposed when ignition source to detect refrigerant adjusting charge, recovering charge, leaks. Use only electronic detector or purging the system. Ensure that suitable for the refrigerant, or bubble earthing continuity is unbroken.
  • Page 15 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 16: Rn Series E Cabinet Feature String Nomenclature

    RN Series E Cabinet Feature String Nomenclature - 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...
  • Page 17 RN Series E Cabinet Feature String Nomenclature 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 0 : A 0 - A...
  • Page 18 RN Series E Cabinet Feature String Nomenclature A M 0 L RN A - 105 - E - 0 - 3 - C A A 0 A - 0 0 0 0 0 : A 0 - A 0 0 - 0 0 0 0 0 - 0 0 0 0 0 - 0 A - 0 0 0 0...
  • Page 19 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...
  • Page 20 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...
  • Page 21 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...
  • Page 22 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...
  • Page 23 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...
  • Page 24 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...
  • Page 25 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...
  • Page 26 - 0 0 - 0 0 - B - 0 0 0 - 0 0 - B A 0 B - 0 0 - 0 0 0 - A 0 0 0 0 0 - E 0 0 0 0 0 - 0 0 0 0 0 0 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...

  • Page 27: General Information

    Certification of Steam or Hot Water Heat Models WARNING a. Certified as a forced air heating system with or without cooling. b. RN Series E Cabinet hot water coils are Improper installation, adjustment, designed for operation with no more than alteration, service, or maintenance 82.2°C (180°F) water at a 1034.2 kpa...

  • Page 28: Receiving Unit

    RN Series E Cabinet chilled water coils Codes and Ordinances are designed for 1034.2 kpa (150 psig) The RN Series E Cabinet has been tested and working pressure. certified by Intertek (ETL) to the following Receiving Unit safety standards: When received, check the unit for damage ANSI Z21.47-2016/CSA 2.3-2016...

  • Page 29: Storage

    Installation AAON equipment has been designed for Vent opening must not be blocked by snow. quick and easy installation. 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.

  • Page 30: Setting The Curb

    Local codes may supersede or further place restrictions on vent termination locations. CAUTION Table 1 - RN Series E Cabinet Unit Clearances Where the supply or warm air duct Unit Size passes through a combustible roof, a...

  • Page 31: Lifting The Unit

    Before lifting unit, be sure that all shipping CAUTION material has been removed from unit. Secure hooks and cables at all lifting points / lugs Incorrect lifting can cause damage to provided on the unit. the unit. Hoist unit to a point directly above the curb and duct openings.

  • Page 32: Duct Connection

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

  • Page 33: Outside Air Rain Hood

    Figure 5 - 75-140 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.

  • Page 34: Electrical

    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.

  • Page 35: Table 3 - Rn Series E Cabinet 75-145 Ton Dual Point Power Methods

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

  • Page 36: Figure 8 - 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 37: Variable Speed Compressors

    CAUTION Variable Speed Compressors Variable speed compressors with VFD speed Scroll compressors are directional control are available on all RN Series E and will be damaged by operation in Cabinet units. Variable speed compressors the wrong direction. Low pressure must not be operated outside the factory...

  • Page 38: Condensate Drain Piping

    Table 6 - Control Wiring Condensate Drain Piping RN Series E Cabinet units are equipped with Wire Size (Stranded) Total Wire Distance two condensate drain connections, one on the - Copper Conductors Allowable left side of the unit and one on the right side Only of the unit.

  • Page 39: Draw-Through Coils

    Condensate drain trapping and piping must Table 7 - Draw-Through Drain Trap conform to all applicable governing codes. Dimensions (Metric) Draw-Through Draw-Through Coils Drain Pan Pressure Trap Dimensions Negative Static (mmHg) (millimeters) (millimeters) -0.93 38.1 19.1 -1.87 50.8 25.4 -2.80 63.5 31.8 -3.74...

  • Page 40: Startup

    Supply Fans This includes checking the air flow, air RN Series E Cabinet units are equipped with filters, condenser water flow, dampers, direct drive backward curved plenum fan heaters, and refrigerant charge.

  • Page 41: Adjusting Refrigerant Charge

    frequency drives. Field airflow adjustment CAUTION may be required at startup. Before completing startup and leaving Air Flow Adjustment the unit a complete operating cycle For single set screw applications, tighten the must be observed to verify that all set screw to the required torque setting components are functioning properly.

  • Page 42: Checking Liquid Sub-Cooling

    After adding or removing charge the system Compare calculated superheat to the tables must be allowed to stabilize, typically 10-15 below for the appropriate coil and system minutes, before making other type and options. adjustments. CAUTION The type of unit and options determine the ranges for liquid sub-cooling and evaporator Expansion valve must be adjusted to superheat.

  • Page 43: Table 12 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Metric)

    Table 12 - 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 44: 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 45: Table 14 - Minimum Airflow And Room Areas

    Table 14 – Minimum Airflow and Room Areas Minimum Room Area in m Charge in Min Airflow in 1.8 m (6 ft) 2.2 m (7.2 3 m (10 ft) 3.7 m (12 kg (oz) /h (CFM) release ft) release release ft) release height height...
  • Page 46 Table 14 – Minimum Airflow and Room Areas (continued) Minimum Room Area in m Charge of Largest Min Airflow in 2.2 m (7.2 ft) 3 m (10 ft) 1.8 m (6 ft) 3.7 m (12 ft) Circuit in kg /h (CFM) release release release...

  • Page 47: Table 15 - R-454B Refrigerant Temperature-Pressure Chart (Metric)

    Table 15 - R-454B Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C 1348.0 38.3 2034.6 -6.7 484.5 843.3 23.3 53.3 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 48: Table 16 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)

    Table 16 - 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 49: Condenser Fan Electronically Commutated Motor (Ecm) Startup

    High voltage wires out of the motor: With Customer Provided Unit Controls Black & Brown - 1 Phase Line Voltage AAON Condenser Head Pressure Module is Green - Ground used for variable speed control of the motor to maintain a head pressure. The motor is...

  • Page 50: Operation

    Operation Thermostat Operation Heating Thermostat system switch - "Heat" Unit operations must be controlled with Thermostat fan switch - "Auto" or "On" thermostat, or unit controller, never at the Thermostat temperature set to desired point. main power supply, except for servicing, emergency, or complete shutdown of the Cooling unit.

  • Page 51: Packaged Dx Cooling Operation And Control

    an auxiliary limit mounted in the supply fan compartment. WARNING Refrigerant sensors are located near the gas heat section to detect leaked refrigerant. In COMPRESSOR CYCLING the event of a refrigerant leak, the gas heat operation is disabled until the leak is cleared. 3 MINUTE MINIMUM OFF TIME prevent motor...

  • Page 52: Dx Cooling

    CHEVRON OIL - SRI No. 2 warranty coverage for fin and tube and TEXACO INC. - PREMIUM RB microchannel coils. AAON E-Coated Coil Maintenance Record sheet. DX Cooling Set unit controls to cooling mode of operation with supply fans on. Check the fan for correct WARNING operating direction, amperage and voltage.
  • Page 53 High velocity water from a pressure washer or compressed air must only be used at a very low pressure to GulfClean ™ Coil Cleaner; AAON PN: prevent fin and/or coil damages. The G074480 force of the water or air jet may bend...

  • Page 54: Microchannel Coil Cleaning

    10 minutes. Then move on to the exterior performance and safety and are the only using the same method. chemicals that AAON will warrant as correct for cleaning microchannel coils. Rinse - Using pressurized potable water such as a garden hose, (< 689.5 kpa [100 psi]),...
  • Page 55 #1 Simple Green Application Examples Simple Green is available from AAON Parts The two procedures can be used to clean Supply (Part# T10701) microchannel coils. They will fit with the biodegradable with a neutral 6.5 pH A 4 to 1 application depending on the area.

  • Page 56: Refrigerant Removal And Evacuation

    of the chemicals on the roof coating is will adequately disperse refrigerant to avoid recommended. concentration above flammable levels. Commercial roofing material manufacturers Refrigerant must be recovered into the using PVC and EPDM have been contacted correct recovery cylinders in accordance with and indicate that there should be no problem local and national regulations.

  • Page 57: Options

    remain within the lubricant. Do not heat the compressor body by using an open flame or WARNING other ignition sources to accelerate this process. Remove any drained oil safely. Piping, pressure limiting devices, backflow preventers and all other Options safety requirements shall (See back of the manual for maintenance log) accordance with national and local...

  • Page 58: Chilled Water Coil

    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 21 - Chilled Water Coil Connection Sizes Coil Chilled Water Coil Model (RNA-)
  • Page 59 builds up, oil is washed out of the CAUTION compressor, leaving it starved for lubrication. CRANKCASE HEATER The compressor life will be seriously shorted OPERATION by reduced lubrication and the pumping of excessive amounts of liquid oil and Some units equipped with refrigerant.

  • Page 60: Evaporator Coil

    Evaporator Coil Remove screws attaching access side, back, and top blank-off panels to the evaporator WARNING coil and the unit. Electric shock hazard. Shut off all Angle the coil so that it fits through the door electrical power to the unit to avoid opening.

  • Page 61: Suction Filter

    In an effort to help protect the compressors can be lifted off the unit. 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)

  • Page 62: Suction Filter Removal Instructions

    8. Open both shut-off valves reclaimed/evacuated. Energy Recovery Units Suction Filter Removal Instructions Some RN Series E Cabinet units have been 1. Shut down operation of the unit equipped with an energy recovery wheel. 2. Close both shut-off valves to isolate...

  • Page 63: Aluminum Energy Recovery Wheel

    Initial Mechanical Check and Setup 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.

  • Page 64: Figure 15 - Aluminum Erw Purge Sector Location

    Figure 15 - 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 65: Polymer Energy Recovery Wheel

    on the profile. In order to adjust their position individual segments is enough to restore unscrew them and place properly. functionality. Please follow the instructions below, presenting proper way of replacing Aluminum Wheel Purge Sector segments or increasing belt tension. Purge sectors are maintenance-free but their condition, rigidness and cleanliness must be 1.

  • Page 66: Figure 16 - 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 67 1. Loosen the three purge adjusting Polymer Wheel Air Seal Adjustments screws. Pile type air seals across both sides of the 2. Adjust purge sector to the specified energy wheel diameter are factory adjusted to angle. provide close clearance between the air seal and wheel.
  • Page 68 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 69 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 70: Figure 17 - 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 71 Segment Installation 3. Holding segment by the two outer corners, press the segment towards the Segment Retainer center of the wheel and inwards against To install wheel segments follow the steps the spoke flanges. If hand pressure does below. Reverse procedure for segment not fully seat the segment, insert the flat removal.

  • Page 72: 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 73: Table 23 - Energy Recovery Wheel Cleaning Frequency

    of the Air Seals and Wheel Drive Class contaminant Components. concentration with inoffensive odor and sensory irritation intensity. Cleaning the energy transfer media will help Class 2 air has moderate contaminant maintain optimal performance. concentration, with mildly offensive odors or frequency of cleaning is largely dependent on sensory-irritation intensity.
  • Page 74 The need for periodic cleaning of the energy To clean, gain access to the aluminum energy recovery wheel will be a function of recovery wheel then use the following operating schedule, climate and contaminants methods: in the indoor air being exhausted and the •...

  • Page 75: Energy Recovery Wheel Defrost Timer Setting

    Energy Recovery Wheel Defrost Timer Setting Set Mode to D T1 is the on time • Set T1 range to 10m (10 minutes) • The scale should show 0-6 on the dial • Set T1 dial to 3 which equals 30 minutes of run time Figure 19 - Temperature Dial T2 is the off time...

  • Page 76: Gas Heating

    If you do not follow these instructions 304.8 m (1,000 ft.) exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. Figure 20 - RN Series E Cabinet Gas Heat Exchanger...

  • Page 77: Table 26- (Metric) Natural Gas Maximum Piping Capacities (M 3 /Hr)

    Table 26- (Metric) Natural Gas Maximum Piping Capacities (m /hr) - Specific Gravity = 0.6, Supply Pressure ≤ 3.5 kpa, Pressure Drop = 0.93 mmHg Length of Pipe Pipe Size (mm) 6.1 m 15.2 m 30.4 m 45.6 m 60.8 m 12.7 25.4 31.75...

  • Page 78: Piping Sizing Examples

    Table 29 – (Imperial) Propane (kBtu/hr) Maximum Piping Capacities Specific Gravity = 1.52, Supply Pressure = 11” w.c., Pressure Drop, 0.5” w.c. Length of Pipe Pipe Size 20 ft 50 ft. 100 ft. 150 ft. 200 ft. 1/2” 3/4” 1” 1-1/4”...

  • Page 79: Piping Supports

    Table 30 - Gas Piping Supports (Metric) AAON gas fired heat exchangers are Pipe Size (mm) Support Intervals designed to be non-condensing. These heat 12.7 to 19.1 Every 1.8 m...
  • Page 80 outside air being introduced to the unit. This freezing for multiple consecutive days) the condensate is generally between a 2.9 and 4 internal and external drain lines for the unit pH level. will need to be heat traced to prevent freezing.

  • Page 81: Figure 21 - Example And 75-140 Ton For Across The Roof Gas Piping

    Figure 21 - Example and 75-140 ton for across the Roof Gas Piping Note: There will be two gas connections, one on each side of the unit...

  • Page 82: 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 83: Gas Heater Operating Instructions

    Gas Heater Operating Instructions Figure 22 - Gas Heater Instructions...

  • Page 84: 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 85: Gas Heat Exchanger Removal

    Gas Heat Exchanger Removal WARNING Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts. DANGER LEAK CHECK GAS PIPE Figure 23 - Gas Heat Exchanger The gas pipe in the unit shall be Attach the heat exchanger to the bulkhead checked for leaks before operation using the holes around the perimeter.

  • Page 86: 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 87 Screens Average Voltage Screen Manufacturer’s Screen VAvg 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 88: Uv Lights

    UV Lights WARNING Some units include UV lights for airstream disinfection. The UV fixture is installed UV LIGHTS directly downstream of cooling coil. Door interlock switches are provided with this Never expose eyes or skin to UVC option. UV lamps ship loose in the vestibule light from any source, as personal and require installation during startup.

  • Page 89: Table 34 - 90-140 Ton Pre Filters

    Table 34 - 90-140 ton Pre Filters Feature Option Quantity / Size Type No Pre Filters 21 / 20” x 24” x 2” & B,C,D Pleated, MERV 8 7 / 16” x 20” x 2” B,G,H,J 28 / 20” x 20” x 1” Metal Mesh, Outside Air Table 35 - 75 ton Unit Filters Feature 9A...

  • Page 90: Figure 24 - Rn Series E Cabinet Standard Filter Layouts

    90-140 ton Units, 2” Filters 90-140 ton Units, 4” Filters Figure 24 - RN Series E Cabinet Standard Filter Layouts All dimensions are in inches and are height x length. Layouts are viewed from the upstream side of the cooling coil.

  • Page 91: 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 94: 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 95 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 96: 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 97: Rn Series E Cabinet Startup Form

    RN Series E Cabinet 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 98 Alignment Check Rotation Nameplate Amps________ Number Band Size_____________________ VAV Controls_________________ VFD Frequency________________ 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...
  • Page 99 Compressors / DX Cooling Head Suction Crankcase Pressure Pressure Heater Number/stage KPA/PSIG KPA/PSIG Amps 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...
  • Page 100 Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 3 – Heating Mode (Heat Pump only) Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 4 – Heating Mode (Heat Pump only) Saturated Line Pressure Sub-cooling Superheat...

  • Page 101: 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 103: Maintenance Log (E-Coated Coil)

    Maintenance Log (E-Coated Coil)

  • Page 104: Literature Change History

    Literature Change History April 2021 Original RN Series E Cabinet IOM. May 2021 Updated the feature options in the feature string nomenclature. January 2022 Updated the unit clearances picture and table. Added sections on UV air disinfection and airflow monitoring. Changed the LEAK CHECK GAS PIPE Danger wording from must to shall.
  • Page 108 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...

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