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AAON CF Series Installation Operation & Maintenance

Condenser and condensing units
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Condenser and Condensing Units
UL-60335
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.
Keep a copy of this IOM with the
unit.
& Maintenance
o Do not store gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance
o WHAT TO DO IF YOU SMELL GAS
 Do not try to light any appliance.
 Do not touch any electrical switch; do not
 Leave the building immediately.
 Immediately call your gas supplier from a
 If you cannot reach your gas supplier, call
o Startup and service must be performed by a
Factory Trained Service Technician.
CF Series
WARNING
use any phone in your building.
phone remote from the building. Follow the
gas supplier's instructions.
the fire department.

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  • Page 1 CF Series Condenser and Condensing Units UL-60335 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 other appliance Failure to follow safety warnings...

  • Page 2: Table Of Contents

    Figure 2 - Forklifting a CF Series B and C Cabinet ..............17 Figure 3 - Lifting Details and Orientation of a CF Series 9-70 ton Condensing Unit ....18 Figure 4 - Orientation of Series 2-7 ton Condensing Unit ............18 Figure 5 - CU evacuation connections ..................
  • Page 3 Figure 16 - Ambient sensor cover ....................48 Figure 17 - A/C Split System Piping, Suction Down ..............57 Figure 18 - A/C Split System Piping, Suction Up ................ 58 Figure 19 - A/C with LAC Split System Piping, Suction Down ..........59 Figure 20 - A/C with LAC Split System Piping, Suction Up ............
  • Page 4 AAON CF Series Features and Options Introduction Energy Efficiency System Integration • Two-Stage, 10-100% Variable Capacity, • Complete Split System with AAON DX or Tandem R-410A Scroll Compressors Air Handling Units • Air-Source Heat Pump • Remote Air-Cooled Condenser Option •...
  • Page 5 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 6 WARNING WARNING FIRE, EXPLOSION OR CARBON GROUNDING REQUIRED MONOXIDE POISONING HAZARD All field installed wiring must be Failure to replace proper controls completed by qualified personnel. Field installed wiring must comply with could result in fire, explosion or NEC/CEC, local and state electrical carbon monoxide poisoning.
  • Page 7 CAUTION CAUTION VARIABLE FREQUENCY DRIVES DOOR LATCHES Door compartments containing Electric motor over-current protection hazardous voltage or rotating parts and overload protection may be a are equipped with door latches that function of the Variable Frequency allow locks. Door latches are shipped Drive to which the motors are wired.
  • Page 8 CAUTION CAUTION COMPRESSOR LUBRICANT COIL CLEANING Polyolester (POE) and Polyvinylether Do not clean DX refrigerant coils with (PVE) oils are two types of lubricants hot water or steam. The use of hot used in hydrofluorocarbon (HFC) water or steam on refrigerant coils will refrigeration systems.
  • Page 9 1. Startup and service must be performed by overload settings. These are set by a Factory Trained Service Technician. the AAON factory for the protection of these motors/compressors and must 2. The unit is for outdoor use only. See not be adjusted over this factory General Information section for more setpoint or bypassed.
  • Page 10 0 - A 0 - E 0 - C 0 - A J 0 - D - B A 0 0 - 0 0 A 0 E 0 0 0 0 0 0 0 D B MODEL OPTIONS CF Series Feature String No menclature A1: Compressor Style Series and Generation 0 = Air-Cooled Condenser - No Compressors...
  • Page 11 CF Series Feature String Nomenclature Model Options Unit Feature Options D E 0 0 - 0 0 A 0 E 0 0 CF A - 015 - B - 0 - 3 - D A 0 0 K : 0 - A 0 - E 0 - C 0 - A N 0 -...
  • Page 12 N = Options C + K (Obsolete) E = Orion VCC-X (Main Controller in Air Handling S = Options A + C + K (Obsolete) Unit) H = AAON Touchscreen Controller (Main Controller 14: Blank in Air Handling Unit) (Obsolete) 0 = Standard...
  • Page 13 D = Compressor Warranty - Years 2-5 22: Type B = Premium AAON Gray Paint Exterior E = Premium AAON Gray Paint Ext + Shrink Wrap X = SPA + Premium AAON Gray Paint Exterior 1 = SPA + Premium AAON Gray Paint Exterior +...
  • Page 14 When received, check the unit for damage Codes and Ordinances that might have occurred in transit. If damage CF Series units have been tested and is found it must be noted on the carrier’s certified, by ETL, in accordance with UL freight bill.
  • Page 15 Storage If installation will not occur immediately CAUTION following delivery, store equipment in a dry protected area away from construction traffic 3-PHASE ROTATION and in the proper orientation as marked on the packaging with all internal packaging in Rotation must be checked on all place.
  • Page 16 The compressor life will be seriously CAUTION shortened by reduced lubrication, and the pumping of excessive amounts of liquid oil COMPRESSOR ROTATION and liquid refrigerant. Scroll compressors are directional Wiring Diagrams and will be damaged by operation in Unit specific wiring diagrams are laminated the wrong direction.

  • Page 17: Figure 1 - Forklifting A Cf Series A Cabinet

    1.8 m (72”) in length. the forks are no more than 15.25 cm (6”) away from the edge of the unit. Figure 2 - Forklifting a CF Series B and C Figure 1 - Forklifting a CF Series A Cabinet Cabinet...

  • Page 18: Table 1 - Clearances For Proper Operation

    Minimum to vandalism or other causes. cable length is 251.5 cm (99”) for CF Series 9-70 ton units. CF Series 2-7 ton units do not The first clearance table below gives the include factory installed lifting lugs and must clearance values for proper unit operation.
  • Page 19 Do not chemicals. Polyolester (POE) oils place the unit under an overhang. CF Series used with R-410A other condensers and condensing units that have a...

  • Page 20: Figure 5 - Cu Evacuation Connections

    (not 8. The minimum micron level required shown). The vacuum pump must be by AAON is 350 microns for systems connected to the manifold set using a using POE oils. 9.5 mm (3/8”) vacuum rated hose.

  • Page 21: Figure 6 - Cu Evacuation Connections

    Low Ambient & Modulating Reheat and liquid line. Both circuits must be System Evacuation Instructions: evacuated separately. Proper system evacuation is critical to 6. FAILURE to connect to the liquid remove moisture and non-condensables from the system before charging the system with line service valve will result in the refrigerant.
  • Page 22 CLEAN AIR ACT 10. The minimum micron level required The Clean Air Act of 1990 bans the by AAON is 350 microns for systems intentional venting refrigerant using POE oils.

  • Page 23: Table 3 - Acceptable Fin & Tube Refrigeration Circuit Values

    Table 3 - Acceptable Fin & Tube Compare calculated sub-cooling to Table 3 Refrigeration Circuit Values for the appropriate unit type and options. Cooling Cooling Notes: Mode Liquid Mode Liquid 1. Must be charged with the hot gas valve Sub-Cooling Sub-Cooling closed.

  • Page 24: Table 4 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values

    Table 4 - 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 25 For refrigeration systems with tandem Adjusting Sub-cooling Superheat compressors, it is critical that the suction Temperatures superheat setpoint on the TXV is set with one The system is overcharged if the sub-cooling compressor running. The suction superheat temperature is too high compared to Table 3 must be 5.6-7.2°C (10-13-) with one and the evaporator is fully loaded (low loads on the evaporator result in increased sub-...

  • Page 26: Table 6 - R-410A Refrigerant Temperature-Pressure Chart (Metric)

    Table 6 - R-410A Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C -6.7 539.9 928.8 23.3 1473.5 38.3 2213.3 53.3 3193.8 -6.1 23.9 38.9 53.9 551.6 946.0 1496.9 2245.0 3235.8 -5.6 564.0 963.2 24.4 1521.0 39.4 2276.7 54.4 3277.9 -5.0 576.4 10.0...

  • Page 27: Table 7 - R-410A Refrigerant Temperature-Pressure Chart (Imperial)

    Table 7 - R-410A Refrigerant Temperature-Pressure Chart (Imperial) °F °F °F °F °F PSIG PSIG PSIG PSIG PSIG 78.3 134.7 213.7 321.0 463.2 80.0 137.2 217.1 325.6 469.3 81.8 139.7 220.6 330.2 475.4 83.6 142.2 224.1 334.9 481.6 85.4 144.8 227.7 339.6 487.8...

  • Page 28: Table 8 - R-454B Refrigerant Temperature-Pressure Chart (Metric)

    Table 8 - R-454B Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C 1348.0 38.3 2034.6 -6.7 23.3 53.3 484.5 843.3 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 29: Table 9 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)

    Table 9 - 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 30: F & Superheat=10

    The following table is available to help with estimating the initial charge to add based on refrigerant line lengths, however, final refrigerant charge must be based on the sub-cooling and superheat values as discussed in the prior section. Table 10 - Estimated R410A Refrigerant Charge per 1.5 meters Additional Additional Additional...

  • Page 31: Table 11 - Charge To Flood Fin And Tube Condenser Coil For Ambient Above 21.3°C (70°F)

    additional charge amount required for the 1. If the ambient is below 21°C (70°F), system when running in cold ambient charge to approximately 0.6-1.1°C (1- conditions. For units with Microchannel 2°F) of sub-cooling measured at the inlet Condenser coils, use Table 12 to find the to the expansion valve.

  • Page 32: Figure 7 - Adjustable Fan Cycling Switch

    Standard units can operate down to 12.8°C (55°F) ambient temperature. Figure 7 - Adjustable Fan Cycling Switch AAON condenser fan head pressure control Variable Speed Low Ambient units can operate down to 1.7°C (35°F) Variable speed condenser fan head pressure ambient temperature.

  • Page 33: Figure 8 - Lac Piping Example

    At the Figure 8 - LAC Piping Example same time the bypassed hot gas raises liquid pressure in the receiver, allowing the system to operate properly. CF Series condensers CAUTION and condensing units use an LAC valve for low ambient operation.
  • Page 34 Equivalent Line Length All line lengths discussed in this manual, All CF Series condensing units are provided unless specifically stated otherwise, are with in-line shutoff valves on both the liquid Equivalent Line Lengths. The frictional and suction lines.
  • Page 35 Liquid refrigerant traveling upwards in a riser minimum 1 inch thick Armaflex insulation, loses head pressure. If the evaporator is as this will prevent capacity loss during below the condenser, with the liquid line heating mode of operation. flowing down, the gravitational force will increase the pressure of the liquid refrigerant.

  • Page 36: Figure 9 - Double Suction Riser Construction

    standpoint. More care must be taken to large riser. At minimum capacity, refrigerant ensure that adequate velocity is achieved to velocity is not sufficient to carry oil up both return oil to the compressor at minimum risers, and it collects in the trap, effectively loading conditions.
  • Page 37 Suction Line Traps Include traps every 6.1 meters (20 feet) in In a fashion similar to the liquid line, a vertical suction riser sections for cooling only common guideline to consider is a system systems and every 3.7 meters (12 feet) for design with pressure losses due to friction heat pump systems.
  • Page 38 the suction line. Pressure loss in the risers, and it collects in the trap, effectively discharge line causes the compressors to closing off the larger diameter riser, and work harder and thus use more power. diverting refrigerant up the small riser where velocity of the refrigerant is sufficient to Discharge Line Routing maintain oil flow.

  • Page 39: Figure 10 - Heat Pump Piping Schematic Of Cooling Mode In Double Riser

    Figure 10 - Heat Pump Piping Schematic of Cooling Mode in Double Riser Figure 11 - Heat Pump Piping Schematic of Heating Mode in Double Riser...
  • Page 40 Discharge Line Traps corresponding -17.2 to -16.7°C (1-2°F) Include traps every 3.7 meters (12 feet) in change in saturation temperature. vertical discharge riser sections. Include a trap at the bottom of the vertical run. For split system piping with long horizontal runs and short vertical risers, a smaller pipe Discharge Line Insulation size can be used to provide sufficient velocity...

  • Page 41: Figure 12 - Oil Return Line

    Hot Gas Reheat point in the system. The oil drip line must be The AAON modulating hot gas reheat system vertical, its diameter must be the same as the diverts hot discharge gas from the condenser...

  • Page 42: Table 14 - Nameplate Voltage Markings & Tolerances

    Electrical The single point electrical power connections are made in the electrical control compartment. Verify the unit nameplate agrees with the power supply. Connect power and control field wiring as shown on the unit wiring diagram provided with the unit. Table 15 - Nameplate Voltage Markings &...
  • Page 43 Three phase voltage imbalance will cause motor overheating and premature failure. The CAUTION maximum allowable imbalance is 2%. 3-PHASE ROTATION Voltage imbalance is defined as 100 times the maximum deviation from the average voltage Rotation must be checked on all divided by the average voltage.

  • Page 44: Table 15 - 35 Kaic Fuse Sizing

    Fuses and Circuit Breakers WARNING The interrupting rating of fuses and circuit breakers is to be determined based on the QUALIFIED INSTALLER KAIC rating of the unit. Refer to the wiring diagram for fuse sizing. Improper installation, adjustment, alteration, service or maintenance can Table 16 –...

  • Page 45: Figure 13 - Variable Capacity Compressor Controller

    When all is running properly, place the a compressor call, but will lock out the controller in the Run mode and observe the compressors on the fifth high pressure trip. system until it reaches a steady state of After the first 15 minutes of operation, one operation.

  • Page 46: Table 17 - Demand Signal Vs. Compressor Capacity Modulation

    Pressure Output + T1 & T2 Discharge Temperature Sensor High Voltage Terminals A1 & A2 Alarm Relay Out The compressor controller modulates the M1 & M2 Contactor compressor unloader solenoid in an on/off Control Voltage N pattern according the capacity demand signal Control Voltage L of the system.

  • Page 47: Table 18 - Thermistor Temperature Vs. Resistance Values

    Figure 14 - Compressor Controller Flash Code Details Table 19 - Thermistor Temperature vs. Resistance Values °C °F kΩ °C °F kΩ 2889.60 12.73 2087.22 10.79 1522.20 9.20 1121.44 7.87 834.72 6.77 627.28 5.85 475.74 5.09 363.99 4.45 280.82 3.87 218.41 3.35 171.17...

  • Page 48: Figure 15 - Adjustable Compressor Lockout

    Compressor Lockouts Some units include adjustable compressor lockouts. The compressor lockout in the picture below can be set to any temperature between -23.3°C and 21.1°C (-10°F and 70°F). The ambient temperature sensor hangs right outside the unit with a cover. Figure 15 - Adjustable compressor lockout Heat pump units include a non-adjustable compressor lockout for the cooling mode set...

  • Page 49: Table 19 - Max Filter Drier Pressure Drops

    This the compressors. The oil is a POE type and includes reading recording is available from your AAON Representative condensing and suction pressures and under part number R63681. checking normal sub-cooling superheat.
  • Page 50 Condenser Coil Inspection The coils are leak tested at 4482 kPa (650 Air-Cooled Condenser psig), before shipment. AAON will not be The air-cooled condenser section rejects heat responsible for loss of refrigerant. It is the by passing outdoor air over the condenser...
  • Page 51 4. Rinse the coil with water as in step one. performance and safety and are the only 5. Repeat as necessary. chemicals that AAON will warrant as correct #2 Water Flush for cleaning microchannel coils. This procedure can be used when the only...
  • Page 52 Use of a water stream, such as a garden hose, against a surface loaded coil will drive the AAON testing has determined that unless a fibers, dirt and salts into the coil. This will chemical has a neutral pH (6-8) it must not be make cleaning efforts more difficult.
  • Page 53 Enviro-Coil Cleaner: AAON PN: V82540 rinse the coils and continue to always work in sections/panels. GulfClean ™ Coil Cleaner ; AAON PN: G074480 Continue until all coil areas on the inside of the unit have been rinsed. Note: Coils must...
  • Page 54 If assistance is required, the service technician must contact AAON. Warranties Please refer to the limitation of warranties in effect at the time of purchase. Replacement Parts Parts for AAON equipment may be obtained contacting your local AAON representative. When...

  • Page 57: Figure 17 - A/C Split System Piping, Suction Down

    Split System Refrigerant Piping Diagrams Figure 17 - A/C Split System Piping, Suction Down...

  • Page 58: Figure 18 - A/C Split System Piping, Suction Up

    Figure 18 - A/C Split System Piping, Suction Up...

  • Page 59: Figure 19 - A/C With Lac Split System Piping, Suction Down

    Figure 19 - A/C with LAC Split System Piping, Suction Down...

  • Page 60: Figure 20 - A/C With Lac Split System Piping, Suction Up

    Figure 20 - A/C with LAC Split System Piping, Suction Up...

  • Page 61: Figure 21 - A/C With Modulating Hot Gas Reheat Split System Piping, Suction Down

    Figure 21 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Down...

  • Page 62: Figure 22 - A/C With Modulating Hot Gas Reheat Split System Piping, Suction Up

    Figure 22 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Up...

  • Page 63: Figure 23 - A/C With Modulating Hot Gas Reheat Split + Lac System Piping, Suction Down

    Figure 23 - A/C with Modulating Hot Gas Reheat Split + LAC System Piping, Suction Down...

  • Page 64: Figure 24 - A/C With Modulating Hot Gas Reheat Split + Lac System Piping, Suction Up

    Figure 24 - A/C with Modulating Hot Gas Reheat Split + LAC System Piping, Suction Up...

  • Page 65: Figure 25 - A/C With Hot Gas Bypass Split System Piping, Suction Down

    Figure 25 - A/C with Hot Gas Bypass Split System Piping, Suction Down...

  • Page 66: Figure 26 - A/C With Hot Gas Bypass Split System Piping, Suction Up

    Figure 26 - A/C with Hot Gas Bypass Split System Piping, Suction Up...

  • Page 67: Figure 27 - A/C With Hot Gas Bypass + Lac Split System Piping, Suction Down

    Figure 27 - A/C with Hot Gas Bypass + LAC Split System Piping, Suction Down...

  • Page 68: Figure 28 - A/C With Hot Gas Bypass + Lac Split System Piping, Suction Up

    Figure 28 - A/C with Hot Gas Bypass + LAC Split System Piping, Suction Up...

  • Page 69: Figure 29 - A/C With Modulating Hot Gas Reheat And Hot Gas Bypass Split System Piping

    Figure 29 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Down...

  • Page 70: Figure 30 - A/C With Modulating Hot Gas Reheat And Hot Gas Bypass Split System Piping

    Figure 30 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Up...

  • Page 71: Figure 31 - A/C With Modulating Hot Gas Reheat And Hot Gas Bypass + Lac Split System Piping, Suction Down

    Figure 31 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass + LAC Split System Piping, Suction Down...

  • Page 72: Figure 32 - A/C With Modulating Hot Gas Reheat And Hot Gas Bypass + Lac Split System Piping, Suction Up

    Figure 32 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass + LAC Split System Piping, Suction Up...

  • Page 73: Figure 33 - Heat Pump Split System Piping, Suction Down

    Figure 33 - Heat Pump Split System Piping, Suction Down...

  • Page 74: Figure 34 - Heat Pump Split System Piping, Suction Up

    Figure 34 - Heat Pump Split System Piping, Suction Up...

  • Page 75: Figure 35 - Heat Pump With Modulating Hot Gas Reheat Split System Piping, Suction Down

    Figure 35 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Down...

  • Page 76: Figure 36 - Heat Pump With Modulating Hot Gas Reheat Split System Piping, Suction Up

    Figure 36 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Up...

  • Page 77: Figure 37 - Heat Pump With Hot Gas Bypass Split System Piping, Suction Down

    Figure 37 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Down...

  • Page 78: Figure 38 - Heat Pump With Hot Gas Bypass Split System Piping, Suction Up

    Figure 38 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Up...

  • Page 79: Figure 39 - Heat Pump With Modulating Hot Gas Reheat And Hot Gas Bypass Split System Piping, Suction Down

    Figure 39 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Down...

  • Page 80: Figure 40 - Heat Pump With Modulating Hot Gas Reheat And Hot Gas Bypass Split System Piping, Suction Up

    Figure 40 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Up...
  • Page 81 CF Series Startup Form Job Name:_____________________________________________ Date:_____________ 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 82 Compressors/DX Cooling Check Rotation Head Suction Crankcase Model Number Pressure Pressure Heater Volts/Amps Volts/Amps Volts/Amps 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...
  • Page 83 Refrigeration System 1 - Heating Mode (Heat Pump Only) Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 2 - Heating Mode (Heat Pump Only) Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 3 - Heating Mode (Heat Pump Only) Saturated Line Pressure...
  • Page 84 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 85 Maintenance Log (E-Coated Coil)
  • Page 86 Clarified forklift instructions and removed wording about curb mounting. June 2016 Updated CF Series Features and Options Introduction. Added Feature 17 Shipping Options in the Feature String Nomenclature. Added Storage information. Added Table for Service Clearances. Clarified Low Ambient section and added a picture of an adjustable fan cycle switch. Added guidelines for variable capacity compressors and tandem compressors in the line sizing section.
  • Page 87 Added the AAON E-Coated Coil Maintenance Record. August 2021 Added option J = AAON Refrigeration Systems Supervisory Controls under Feature 8B. Updated the suction line & discharge line traps to include wording for a trap at the bottom of the vertical...
  • Page 88 December 2021 Added microchannel condenser coil option to Feature A2. Added 10kAIC option to Feature 16. Added Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values table. Added microchannel cleaning section. Added Estimated R410A Refrigerant Charge per 5ft table to help with initial charge estimates based on refrigerant line lengths. Updated values in the Charge to Flood Condenser Coil for Ambient Above 70°F table and added a table for microchannel condenser coils.
  • Page 90 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.

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