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AAON CF Series Heat Pump Maintenance

The AAON CF Series Heat Pump Maintenance is a standard procedure that checks the operation quality of the machines components. Be sure to follow the safety steps provided to avoid any accidents.
MaintainX
04/26/2021

AAON CF Series Heat Pump Maintenance

83 steps
The AAON CF Series Heat Pump Maintenance is a standard procedure that checks the operation quality of the machines components. Be sure to follow the safety steps provided to avoid any accidents.
  • Compressors

  • Refrigerant Filter Driers

  • Table 6 - Max Filter Drier Pressure Drops

  • Adjusting Refrigerant Charge

  • CAUTION! COMPRESSOR LUBRICANT 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.

  • CAUTION! CLEAN AIR ACT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC’s and HCFC’s) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for non-co

  • Before Charging

  • Checking Liquid Sub-cooling

  • Table 7 - Acceptable Refrigeration Circuit Values

  • Notes

  • Checking Evaporator Superheat

  • CAUTION! EXPANSION VALVE ADJUSTMENT Thermal expansion valves must be adjusted to approximately 8-15°F of suction superheat. Failure to have sufficient superheat will damage the compressor and void the warranty.

  • Adjusting Sub-cooling and Superheat Temperatures

  • CAUTION! DO NOT OVERCHARGE! Refrigerant overcharging leads to excess refrigerant in the condenser coils resulting in elevated compressor discharge pressure.

  • Special Low Ambient Option Charging Instructions

  • For units equipped with low ambient control (LAC) refrigerant flood back option being charged when the ambient temperature is warm:

  • For units equipped with low ambient refrigerant flood back option being charged when the ambient temperature is cold:

  • Oil Level

  • Table 8 - R-410A Refrigerant Temperature-Pressure Chart

  • Lubrication

  • Condenser Tube Inspection

  • Maintenance Recommendations

  • Fan Motor Maintenance

  • Cleaning -: Remove

  • Labeled Motors - It is imperative for repair of a motor with Underwriters’ Laboratories label that original clearances be held

  • Access Doors

  • Propeller Fans and Motors

  • Recommended Annual Inspection

  • Air-Cooled Condenser

  • E-Coated Coil Cleaning

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

  • CAUTION! PRESSURE CLEANING High velocity water from a pressure washer or compressed air should only be used at a very low pressure to prevent fin and/or coil damages. The force of the water or air jet may bend the fin edges and increase airside pressure d

  • Quarterly cleaning is essential to extend the life of an e-coated coil and is required to maintain coating warranty coverage.

  • CAUTION! COIL CLEANERS 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. I

  • Recommended Coil Cleaner

  • The following cleaning agent, assuming it is used in accordance with the manufacturer’s directions on the container for proper mixing (4:1 condensers & 8:1 evaporators) and cleaning, has been approved for use on ecoated coils to remove

  • Enviro-Coil Concentrate, Part Number HEC01.

  • Recommended Chloride Remover

  • Service

  • Warranties

  • Replacement Parts

  • NOTE: Before calling, technician should have model and serial number of the unit available for the customer service department to help answer questions regarding the unit.

Source: Aaon

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