Back

AAON RN Series 6 - 140 tons Outdoor Heat Pump Yearly Maintenance

The AAON RN Series 6 - 140 tons Outdoor Heat Pump Yearly Maintenance emphasizes safety on all steps when maintenance is being conducted on the machine. Finishing this lenghty procedure ensures that the quality of performance does not drop.
MaintainX
04/26/2021

AAON RN Series 6 - 140 tons Outdoor Heat Pump Yearly Maintenance

151 steps
The AAON RN Series 6 - 140 tons Outdoor Heat Pump Yearly Maintenance emphasizes safety on all steps when maintenance is being conducted on the machine. Finishing this lenghty procedure ensures that the quality of performance does not drop.
  • At least once each year, a trained, qualified service technician should check out the unit. Fans, evaporator coils, and filters should be inspected at least monthly.

  • Gas Heating

  • WARNING! Once a year, before the unit is in operation for the heating season, a qualified service technician should inspect all flue product carrying areas of the furnace and main burners for continued safe operation.

  • DANGER! LEAK CHECK GAS PIPE The gas pipe in the unit should be checked for leaks before startup. Leak checking is the responsibility of the installing contractor. All connections should be checked for leaks annually after installation. Failure to leak che

  • 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 The gas pipe in the unit should be checked for leaks before startup. Leak checking is the responsibility of the installing contractor. All connections should be checked for leaks annually after installation. Failure to leak ch

  • Removal

  • Reinstallation

  • Figure 51 - Gas Heat Exchanger

  • DX Cooling

  • Condenser Fans (6-25 and 30 ton)

  • Condenser fans and motors can be removed and reinstalled as individual assemblies.

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

  • WARNING! Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Startup and service must be performed by a Factory Trained Service Technician.

  • Removal

  • Figure 52 - Removal of a Condenser Fan Assembly

  • Reinstallation

  • Condensate Drain Pans

  • Evaporator Coil (6-25 and 30 ton)

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

  • Removal

  • Figure 53 - Evaporator Coil Access

  • Reinstallation

  • Brazed Plate Heat Exchanger Cleaning

  • E-Coated Coil Cleaning

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

  • If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges bent over) if the tool is applied across the fins

  • CAUTION! Harsh chemicals, household bleach, or acid cleaners should not be used to clean outdoor or indoor e-coated coils. These cleaners can be very difficult to rinse out of the coil and can accelerate corrosion and attack the E-coating. If there is dir

  • Recommended Coil Cleaner – Step 1

  • GulfCoatTM Coil Cleaner, assuming it is used in accordance with the manufacturer's directions on the container for proper mixing and cleaning, has been approved for use on

  • Never use any cleaners that are not approved.

  • Recommended Chloride Remover – Step 2

  • Never use any chloride removers that are not approved.

  • Warranty Protection – Step 1

  • Complete the coil cleaning following these steps:

  • NOTE: Coils should always be cleaned / back flushed, opposite of airflow to prevent impacting the dirt into the coil.

  • Warranty Protection – Step 2 Complete the coil chloride (salt) removal following these steps:

  • Microchannel Coil Cleaning

  • Air-cooled heat exchangers may include microchannel coils

  • Allowed Chemical Cleaners and Procedures

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

  • Simple Green

  • Simple Green is available from AAON Parts and Supply (Part# T10701) and is biodegradable with a neutral 6.5 pH. Recommendation is to use it at a 4 to 1 mix. Use the following procedure.

  • Water Flush

  • This procedure can be used when the only material to cause the coil to need cleaning is debris from plant material that has impinged the coil face.

  • CAUTION! Use pressurized clean water, with pressure not to exceed 140 psi. Nozzle should be 6” and 80° to 90° from coil face. Failure to do so could result in coil damage.

  • Application Examples

  • Other Coil Cleaners

  • Roofing

  • Supply Fans

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

  • CAUTION! Blower wheels and bands must be inspected for excessive dust build up periodically and cleaned if required. Excessive dust build up on blower wheels may cause an unbalanced state; leading to vibration and/or component failure. Damages due to exce

  • Lubrication

  • Recommended greases are:

  • Removal (6-25 and 30 tons)

  • Figure 54 - 9-25 and 30 ton Supply Fan

  • Figure 55 - Bolts which Connect Motor Mount to Blower Fan

  • Power Exhaust Motor and Belt Removal

  • 21.PNG
  • 22.PNG
  • 23.PNG
  • Phase and Brownout Protection Module

  • DPM Setup Procedure

  • Recommended Default Set-up

  • 25.PNG
Source: Aaon

Please note that any procedure, checklist, or other document available in the MaintainX Global Procedure Library is provided for general education and information only and does not constitute legal, medical, or financial advice. MaintainX makes the materials available AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any such use, including compliance with applicable law and with meeting any conditions of product warranties.