AAON RQ SERIES Installation Operation & Maintenance
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AAON RQ SERIES Installation Operation & Maintenance

Packaged rooftop units, heat pumps, & outdoor air handling units
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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 should 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
RQ SERIES
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.

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  • Page 1 RQ SERIES 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® RQ Series Features and Options Introduction ..............7 Safety .............................. 8 RQ Series Feature String Nomenclature ..................13 General Information ........................22 Codes and Ordinances ......................22 Receiving Unit .......................... 23 Packaged Direct Expansion (DX) Units ................... 24 Gas or Electric Heating ......................
  • Page 4 Replacement Parts ........................86 Appendix A - Heat Exchanger Corrosion Resistance ..............87 Appendix B - Thermistor Temperature vs. Resistance Values ............. 89 RQ Series Startup Form ........................ 90 Maintenance Log .......................... 94 Literature Change History......................95 R94490 · Rev. F · 170925...
  • Page 5 Table 19 - Demand Signal vs. Compressor Capacity Modulation ..........84 Table 20 - RQ Series 2-6 ton Pre Filters ..................85 Table 21 - RQ Series 2-6 ton Unit Filters ..................86 Table 22 - RQ Series 2-6 ton Energy Recovery Wheel Filters ............. 86...
  • Page 6 Figure 2 - RQ Series Orientation ....................27 Figure 3 - RQ Cabinet Standard and Power Exhaust Gasket Locations ........29 Figure 4 - Forklifting an RQ Series Unit from the Side ............... 30 Figure 5 - Forklifting an RQ Series Unit from the Front .............. 30 Figure 6 - Lifting Details of a 2-6 ton Standard or Power Exhaust Unit ........

  • Page 7: Aaon® Rq Series Features And Options Introduction

    AAON® RQ Series Features and Options Introduction Energy Efficiency  Direct Drive Backward Curved Plenum Installation and Maintenance Supply Fans Clogged Filter Switch  Variable Capacity R-410A Scroll   Color Coded Wiring Diagram Compressors  Compressors in Isolated Compartment ...

  • Page 8: Safety

    Safety Attention should be paid to the following statements: NOTE - Notes are intended to clarify the unit installation, operation and maintenance. CAUTION - Caution statements are given to prevent actions that may result in equipment damage, property damage, or personal injury. WARNING - Warning statements are given to prevent actions that could result in equipment damage, property damage, personal injury or death.
  • 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 UNIT HANDLING WATER PRESSURE To prevent injury or death lifting Prior to connection of condensing equipment capacity shall exceed unit water supply, verify water pressure is weight by an adequate safety factor. less than maximum pressure shown Always test-lift unit not more than 24 on unit nameplate.
  • Page 11 Failure of the condenser as a result with manufacturer’s usage of chemical corrosion is excluded instructions. Failure follow from coverage under AAON Inc. instructions may result in equipment warranties and the heat exchanger manufacturer’s warranties. damage, injury or death. CAUTION WARNING Door...
  • Page 12 1. Startup and service must be performed is used with electric heat, the exhaust Factory Trained Service duct should be an L shaped duct. Technician. 7. Clean furnace, duct and components 2. Use only with type of the gas approved upon completion of the construction for the furnace.

  • Page 13: Rq Series Feature String Nomenclature

    RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 14 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 15 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 16 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - O D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 17 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 18 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 19 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 20 RQ Series Feature String Nomenclature Model Options Unit Feature Options R Q - 0 0 5 - 3 - V - B B 0 1 - 3 3 4 : A 0 0 0 - D 0 B - P J C - 0 B A - 0 D 0 0 0 0 L - 0 0 - 0 0 B 0 0 0 0 0 B...
  • Page 21 Feature 23: TYPE B = Standard - AAON Gray Paint U = Special Pricing Authorization + Special Paint X = Special Pricing Authorization + AAON Gray Paint 4 = Standard Paint + 5 Year Parts Only Warranty 9 = Standard Paint + 10 Year Parts Only Warranty...

  • Page 22: General Information

    Codes and Ordinances RQ Series units have been tested and Certification of Gas Heat Models certified, by ETL, in accordance with UL a. AAON heat...

  • Page 23: Receiving Unit

    Installation of RQ Series units must conform transit. If damage is found it should be noted on the carrier’s freight bill. A request for to the ICC standards of the International inspection by carrier’s agent should be made Mechanical Code, the International Building Code, and local building, plumbing and in writing at once.

  • Page 24: Packaged Direct Expansion (Dx) Units

    compressor is designed to pump refrigerant Storage If installation will not occur immediately gas and damage may occur when power is following delivery, store equipment in a dry restored. protected area away from construction traffic and in the proper orientation as CAUTION marked on the packaging with all internal packaging in place.

  • Page 25: Gas Or Electric Heating

    Note: Low Ambient Operation electric heating coil may overheat, and may Air-cooled DX units without a low ambient cut the burner or heater off entirely by action option, such as condenser fan cycling, ECM of the safety high temperature limit devices driven condenser fans or the 0°F low which are factory mounted at the heat ambient option, will not operate in the...

  • Page 26: Wiring Diagrams

    Table 2 - Auxiliary Electric Heating Capacities Feature 3 kW (208V) kW (230V, 380V 460V, 575V) *K = Heat K 10.0 *L = Heat L 15.0 20.0 *M = Heat M 22.5 30.0 *N = Heat N 30.0 40.0 Wiring Diagrams Unit specific wiring diagrams are laminated and affixed inside the compressor and control compartment door.

  • Page 27: Installation

    Unit should also be installed so that the flow of combustion intake air is not Figure 2 - RQ Series Orientation obstructed from reaching the furnace. Vent opening must not be blocked by snow.
  • Page 28 only. Do not make openings larger than necessary. Set the curb to coincide with the openings. Make sure the curb is level. Unit must be level in both horizontal axes to support the unit and reduce noise and vibration. CAUTION All roofing work should be performed by competent roofing contractors to avoid any possible leakage.

  • Page 29: Figure 3 - Rq Cabinet Standard And Power Exhaust Gasket Locations

    Figure 3 - RQ Cabinet Standard and Power Exhaust Gasket Locations...

  • Page 30: Forklifting The Unit

    44” under the unit. lifting from either side, the forks must extend through to the opposite side of the Forks Figure 4 - Forklifting an RQ Series Unit from the Side Figure 5 - Forklifting an RQ Series Unit from the Front...

  • Page 31: Lifting The Unit

    However, the unit may be lifted Lifting the Unit The RQ Series units must be lifted using the with the outside air hood in the open lifting points in the side base rails. position. spreader bar must be used to prevent the lifting straps from damaging the unit.

  • Page 32: Vertical Duct Connection

    Vertical Duct Connection CAUTION Note: If outside air will be in contact with the air tunnel base the unit should include Do not drill or punch holes in the the base insulation option or the base must base of the unit, from inside the unit be field insulated.

  • Page 33: Seismic Curb Installation

    All mounting details listed must be followed to Structural engineer of record must approve achieve seismic certification. The AAON building anchorage to unit or curb in unit must be certified to ICC-ES AC156...

  • Page 34: Figure 10 - Seismic Solid Bottom Curb Without Filters Cross Section

    Figure 10 - Seismic Solid Bottom Curb without Filters Cross Section Figure 11 - Seismic Solid Bottom Curb without Filters Detail A Figure 12 - Seismic Solid Bottom Curb without Filters Detail B...

  • Page 35: Horizontal Duct Connection

    Figure 13 - Seismic Rigid Mount Curb Cross Section Remove the two screws at the bottom of the Horizontal Duct Connection Note: If outside air will be in contact with rain hood that secure it in the shipping the air tunnel base the unit should include position.

  • Page 36: Metal Mesh Filters

    Figure 16 - RQ Series unit Open Rain Hood Figure 15 - RQ Series unit Closed Rain Hood Metal Mesh Filters Clips which hold the metal mesh filters in Metal mesh outside air filters require the filter rack should face outward.

  • Page 37: Electrical

    compartment). See unit drawing for specific Electrical Verify the unit nameplate agrees with power location. supply. Connect power and control wiring to the unit as shown in Figure 12 and in the CAUTION unit specific wiring diagram, which shows factory and field wiring and is attached to Installing Contractor is responsible the inside of the door of the control for proper sealing of the electrical...
  • Page 38 Size supply conductors based on the unit Voltage imbalance is defined as 100 times MCA rating. Supply conductors must be the maximum deviation from the average rated a minimum of 75°C. voltage divided by the average voltage. Protect the branch circuit in accordance with Example: code requirements.

  • Page 39: Variable Speed Compressors

    following chart to determine the allowable CAUTION wiring distances. Scroll compressors are directional Table 5 - Control Wiring and will be damaged by operation in Wire Size (Stranded) Total Wire Distance the wrong direction. Low pressure - Copper Conductors Allowable switches on compressors have been Only disconnected after factory testing.

  • Page 40: Gas Heating

    Fuel & Propane Installation Code CSA B149.1 or B149.2. Figure 20 - RQ Series Gas Heat Exchanger Maximum Piping Capacities Table 7 - Natural Gas (ft /hr) - Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.5” w.c.

  • Page 41: Piping Sizing Examples

    Table 8 - Propane (kBtu/hr) - 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” 1496 1-1/2” 2299 1417 2”...

  • Page 42: Gas Pressure Regulator & Overpressure Protection Device

    Gas Pressure Regulator & Overpressure Table 9 - Gas Piping Supports Protection Device Pipe Size Support Intervals 1/2” to 3/4” A gas pressure regulator must be installed if Every 6 ft 3/4” to 1” natural gas supply pressure to the unit is Every 8 ft greater than 10.5”...

  • Page 43: Figure 21 - Example 2-6 Ton Through The Base Gas Piping

    Figure 21 - Example 2-6 ton through the Base Gas Piping...

  • Page 44: Leak Testing

    Leak Testing performing the initial startup at the jobsite, it All components of gas supply system, is highly recommended that people or any including manual shut off valves and the other living animals, which may be sensitive piping in the interior of the unit, should be to the residual odors or gases, NOT be leak tested with a soap solution before present in the conditioned space during the...

  • Page 45: Open Loop Applications

    AAON warranties and the another passage. Water is subject to freezing heat exchanger manufacturer warranties. at 32°F. When water freezes in a heat exchanger significant forces are exerted on...

  • Page 46: Water Piping

    AAON warranties and the Water loop piping that runs through heat exchanger manufacturer warranties. unheated areas or outside the building should be insulated. Unit is capable of operating with Entering Water Temperatures (EWT) as low as 57°F, Water Piping...
  • Page 47 condenser inlet to prevent condenser fouling CAUTION and internal tube damage. PVC (Polyvinyl Chloride) and CPVC Mineral content of the condenser water must (Chlorinated Polyvinyl Chloride) are be controlled. All make-up water has vulnerable attack certain minerals in it and as the water is evaporated chemicals.

  • Page 48: Condensate Drain Piping

    for mixing and temperature stabilization, CAUTION wells in the water piping should extend at least ½ pipe diameter into the pipe. Unit should not be operated without a p-trap. Failure to install a p-trap may CAUTION result in overflow of condensate water into the unit.

  • Page 49: Figure 22 - Post Corner Hole Location

    Figure 22 - Post Corner Hole Location Figure 23 - Post Back Hole Location...

  • Page 50: Figure 24 - Post Corner Hole Piping

    Figure 24 - Post Corner Hole Piping Figure 25 - Post Back Hole Piping...

  • Page 51: Heating Coils

    Table 14 - Chilled Water Coil Connection Heating Coils One or two row hot water and steam heating Sizes and preheating coils can be factory installed. Chilled Water Coil Model (RQ-) All valve controls for heating operation are Connection Size 7/8”...

  • Page 52: Electric Preheat

    Electric Preheat Flash Code LED Screen Controller Buttons Figure 26 - Preheat Controller The electric preheat controller is factory 3. LATset - Leaving air temperature (°F) installed within the preheat cabinet. The control setpoint. following details are for EHC1 version 1.10 of the preheat controller.

  • Page 53: System Setting Screens

    “Low Limit Time” 6. LLTset 11. LATB Leaving probe "B" temperature (°F) setpoint. this temperature (°F). temperature is not reached at full output, relay will pull in. 12. ManSTG - Manual override stage for system testing. override automatically cancels after ten minutes; 7.

  • Page 54: Table 15 - Stages Of Electric Preheat

    “Low Limit Time” 2. BelowLLT - "Below Low Limit Time". 6. LLTset Range = 10sec-1800sec, and the default temperature setpoint. Range = 35°F- is 10sec. If ‘LLTset’ temperature is not 50°F, and the default is 35°F. If reached within ‘BelowLLT’ after ‘LLTSet’...

  • Page 55: Led Flash Alarm Codes

    LED Flash Alarm Codes 7 = Stage 1 only recovery after The flashing red LED will be to the right of mechanical limit the screen. The number of blinks is described below. The LCD screen will also display the screens. 1 = LATA probe open/short 8 = Shutdown after too many hi limit events...

  • Page 56: Energy Recovery Units

    Energy Recovery Units The modulating electric preheat option is WARNING designed to temper the incoming outside air to the unit based on an enable control signal and the outside air conditions. Improper installation, adjustment, A 24VAC enable signal must be provided to alteration, service or maintenance the [PHE] terminal to enable the operation cause...
  • Page 57 proper operation efficiency and building to provide close clearance between the air occupant comfort. seal and wheel. Normal maintenance requires periodic inspection of filters, the cassette wheel, drive belts, air seals, wheel drive motor, and its electrical connections. Wiring diagrams are provided with each motor.
  • Page 58 at a time to provide slip fit clearance when rigging shown following the wheel is rotated by hand. illustration. Confirm that the wheel rotates freely. Apply Routine maintenance Energy power to the unit and confirm rotation. Recovery Cassettes includes periodic cleaning of the Energy Recovery Wheel as Airflow Balancing and Checking well as inspection of the Air Seals and...
  • Page 59 A characteristic of all dry desiccants, such to separate polymer strips for better cleaning films can close off micron sized pores at the action. Rinse dirty solution from segment surface of the desiccant material, reducing and remove excess water before reinstalling the efficiency by which the desiccant can in wheel.
  • Page 60 Installation Considerations Frame Bearing beams shown racked Energy recovery cassettes are incorporated within the design of packaged units, packaged air handlers and energy recovery ventilators. In each case, it is recommended Wheel that following considerations addressed: Bearing beams Accessibility The cassette and all its operative parts; i.e.: motor, belt, pulley, bearings, seals and Flat surface energy transfer segments must be accessible...
  • Page 61 and diameter seals, as shown in hub seal Service adjustment diagram. CAUTION 5. Start and stop wheel several times to confirm seal adjustment and to confirm belt Disconnect electrical power before tracking properly wheel servicing energy recovery cassette. (approximately 1/4” from outer edge of Always keep hands...
  • Page 62 4. While supporting weight of drive motor in one hand, loosen and remove (4) mounting bolts. 5. Install replacement motor with hardware kit supplied. 6. Install pulley to dimension as shown and secure set screw to drive shaft. 7. Stretch belt over pulley and engage in groove.
  • Page 63 6. Reinstall the bearing onto the wheel shaft, being careful to engage the two locating pins into the holes in the bearing support beam. Secure the bearing with two self-locking nuts. 7. Install the belts around the wheel and pulley according to the instructions provided with the belt.

  • Page 64: Startup

    Adjusting Refrigerant Charge Startup Adjusting the charge of a system in the field (See back of the manual for startup form.) must be based on determination of liquid sub-cooling and evaporator superheat. On a system with a TXV liquid sub-cooling is WARNING more representative of the charge than evaporator superheat but both measurements...

  • Page 65: Checking Liquid Sub-Cooling

    The type of unit and options determine the Table 16 - Acceptable Refrigeration Circuit ranges for liquid sub-cooling and evaporator Values superheat. Refer to Table 13 below when Air-Cooled Cond./Air-Source Heat Pump determining the proper sub-cooling. Sub-Cooling 8-15°F Sub-Cooling with 8-15°F Checking Liquid Sub-Cooling Hot Gas Reheat...

  • Page 66: Table 17 - R-410A Refrigerant Temperature-Pressure Chart

    The system is undercharged if the superheat If the sub-cooling is correct and the is too high and the sub-cooling is too low superheat is too high, the TXV may need adjustment to correct the superheat. Correct an undercharged system by adding refrigerant to the system to reduce superheat and raise sub-cooling.

  • Page 67: Gas Heater Instructions

    Gas Heater Instructions Figure 27 - Gas Heater Instructions...

  • Page 68: Freeze Stat Startup

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

  • Page 69: Condenser Fan Ec Motor Startup

    8 & 16. If a potentiometer is installed If the following troubleshooting suggestions in the unit, the 10VDC output of the motor do not solve the issue, contact AAON for electronics will be wired through the assistance. potentiometer and then back into pin 8 & 16 speed control.

  • Page 70: Table 18 - Ec Condenser Fan Cycling Options

    Table 18 - EC Condenser Fan Cycling Options Customer Color Terminal Connection Option 1 Option 2 Option 3 Option 4 Option 5 Black 0.50 BWS 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC Brown 0.50 BWS 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC...

  • Page 71: 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 72 Cut In Gauge Cut In Gauge To lower the pressure set point for the CUT IN To raise the pressure set point for the CUT IN gauge, turn the adjustable screw clockwise. gauge, turn the adjustable screw counter clockwise. Differential Differential Gauge Gauge...

  • Page 73: Operation

    Packaged DX Cooling Operation and Operation Control When a call for cooling (G and Y1, Y2, etc.) is made the supply blower motors and Unit operations should be controlled with compressors will energize. thermostat, or unit controller, never at the main power supply, except for servicing, emergency, or complete shutdown of the WARNING...

  • Page 74: Electric Heating Operation

    Gas Heating Electric Heating Operation WARNING When a call for heating (G and W1, W2, etc.) is made the supply blower motors and Once a year, before the unit is in electric resistance heaters will energize. operation for the heating season, a Heating is accomplished by passing qualified service technician should electrical current through a specified amount...

  • Page 75: Gas Heat Exchanger Removal

    Ensure that the neoprene isolator is installed qualified service agency and only after around the perimeter of the heat exchanger. consultation with AAON service representative. Insert heat exchanger into opening so that If induced draft blower/motor assembly has the back of the main plate is against the unit to be replaced, care must be taken to provide bulkhead.

  • Page 76: Dx Cooling

    WARNING Improper installation, adjustment, alteration, service, or maintenance cause property damage, personal injury, or loss of life. Startup and service must be performed by a Factory Trained Service Technician. Removal Take off the fan grill by removing the Figure 29 - Gas Heat Exchanger screws that attach it to the top of the unit.

  • Page 77: Evaporator Coil

    will also prevent any possible plugging of the drain lines and overflow of the pan itself. Reinstallation Cleaning of the drain pans and inside of the Slide the new coil into the unit through the unit should be done only by qualified notch cut in the front of the drain pan.
  • Page 78 CAUTION Use of a water stream, such as a garden hose, against a surface loaded coil will drive Harsh chemicals, household bleach, the fibers and dirt into the coil. This will or acid cleaners should not be used make cleaning efforts more difficult. Surface to clean outdoor or indoor e-coated loaded fibers must be completely removed coils.

  • Page 79: Microchannel Coil Cleaning

    #1 Simple Green Proper procedure should be followed at Simple Green is available from AAON Parts every cleaning interval. Using improper Supply (Part# T10701) cleaning technique or incorrect chemicals biodegradable with a neutral 6.5 pH.
  • Page 80 4. Rinse the coil with water as in step one. warranty. 5. Repeat as necessary. AAON testing has determined that unless a chemical has a neutral pH (6-8) it should not #2 Water Flush This procedure can be used when the only be used.

  • Page 81: Supply Fan

    Supply Fan WARNING Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts. CAUTION Blower wheels and bands must be inspected for excessive dust build up Figure 32 - 2-6 ton Supply Fan periodically and cleaned if required.

  • Page 82: Figure 34 - Rq Supply Fan Removal Slide

    sheet-metal slide) out of unit through blower the output contacts will be activated. If the access opening (see Figure 34). line voltages fall outside setup parameters, the output relay will be de- energized after the trip delay. Once the line voltages recover, the DPM will re-energize the output relay after the restart time delay.
  • Page 83 Screens Manufacturer’s Screen R-K Electronics DPM v0.0.00 Average Voltage Screen VAvg 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 84: Variable Capacity Compressor Controller

    Variable Capacity Compressor Controller Low Voltage Terminals 24COM Module Common Units with variable capacity scroll 24VAC Module Power compressors may include the following C1 & C2 Demand Input compressor controller. The following is an Pressure Common explanation terminals Pressure Input troubleshooting alert flash codes of the Pressure Power 5VDC controller.

  • Page 85: Filter Replacement

    (PE = shock hazard or injury from rotating Power Exhaust) parts. Table 20 - RQ Series 2-6 ton Pre Filters Feature 6A Quantity / Size Type No Pre Filters 2 / 20”...

  • Page 86: Replacement Parts

    Pleated, 65% Eff, MERV 11 2 / 20” x 20” x 4” Pleated, 85% Eff, MERV 13 Pleated, 95% Eff, MERV 14 Table 22 - RQ Series 2-6 ton Energy Recovery Wheel Filters Feature 1A Quantity / Size Type 1 / 16” x 16” x 2”...

  • Page 87: Appendix A - Heat Exchanger Corrosion Resistance

    Appendix A - Heat Exchanger Corrosion Resistance 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. The actual corrosion is a very complex process influenced by many different factors in combination. Explanations: + Good resistance under normal conditions 0 Corrosion problems may occur especially when more factors are valued 0 - Use is not recommended...
  • Page 88 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 89: 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 90: Rq Series Startup Form

    RQ Series Startup Form Job Name:_______________________________________________ Date:______________ Address:______________________________________________________________________ ______________________________________________________________________________ Model Number:_________________________________________________________________ Serial Number:_____________________________________________ Tag:_______________ Startup Contractor:______________________________________________________________ Address:______________________________________________________________________ _______________________________________________________ Phone:______________ Pre Startup Checklist Installing contractor should verify the following items. 1. Is there any visible shipping damage? 2. Is the unit level? 3.
  • Page 91 Supply Fan Assembly Alignment Check Rotation Nameplate Amps________ Number Band Size_____________________ VAV Controls_________________ VFD Frequency________________ Energy Recovery Wheel Assembly Wheel Spins Freely Check Rotation FLA ________ Number Power Exhaust Fan Assembly Alignment Check Rotation Nameplate Amps________ Number Band Size_____________________ VFD Frequency________________ Outside Air/Economizer Dampers Operation Check Damper Wiring Check...
  • Page 92 Compressors/DX Cooling Check Rotation Head Suction Number Pressure Pressure PSIG PSIG 1 - Full Capacity 1 - Reduced Capacity Refrigeration System 1 Full Capacity - Cooling Mode Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 1 Reduced Capacity - Cooling Mode Saturated Line Pressure...
  • Page 93 Water/Glycol System 1. Has the entire system been flushed and pressure checked? 2. Has the entire system been filled with fluid? 3. Has air been bled from the heat exchangers and piping? 4. Is the glycol the proper type and concentration (N/A if water)? 5.

  • Page 94: 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 95: Literature Change History

    Literature Change History February 2011 Added information regarding the charging of a heat pump and added additional information regarding freezing water in the heat exchanger. June 2011 Updated filter information. April 2012 Added chilled water, hot water, and steam coil connection sizes. August 2012 Added seismic curb installation instructions.
  • Page 96 Updated Phase and Brownout Protection Module section and added Freeze Stat Startup section. April 2016 Added Adjustable Fan Cycling Switch Procedure section. May 2016 Added AAON Touchscreen Controller. July 2016 Updated Neoprene statements and E-Coated Cleaning section. January 2017 Added Variable Speed Compressor option.
  • Page 100 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 product without notice, obligation, or liability.

This manual is also suitable for:

Rq seriesRq-002Rq-003Rq-004Rq-005Rq-006

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