Literature Change History
July 2015
Initial version
March 2016
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.
Added double riser schematics and discussion for heat pump operation. Added a section on
compressor lockouts. Included heat pump charging guidelines in the Acceptable Refrigeration
Circuit Values Table. Added Special Low Ambient Option Charging Instructions. Added A/C
with LAC Piping to show low ambient piping which is internal to the condensing unit.
March 2017
Updated Piping Diagrams because receivers are now factory installed in CF 2-7 tons.
April 2017
Updated service clearances tables and added a table for coil pull. Updated orientation of the CF
9-70 ton. Added a note that AAON does not allow underground refrigerant lines. Added
clarification to the liquid line solenoid valve recommendation. Added a double suction risers
figure. Removed solenoid valve recommendation on the heat pump double risers and updated the
figures. Added a suction line traps section. Changed the suction flow minimum velocity for
variable compressors. Changed the caution note by removing the variable capacity compressor
wording. Added discharge line sizing guidelines. Removed the hot gas bypass piping
considerations for evaporator below condensing unit since they are the same as for evaporator
above condensing unit. Added a figure for oil return line. Changed the maximum hot gas
maximum velocity from 4,000 fpm to 3,500 fpm. Changed the sub-cooling values in the
Acceptable Refrigeration Circuit Values table. Updated heat pump piping diagrams to include
suction/discharge line traps in suction down diagrams. Added all the LAC piping diagrams.
October 2017
Updated digital compressor discharge up minimum velocity. Updated charge information.
Updated phase imbalance example. Added Air Cooled Condenser Option in A1 Compressor Style.
Added No Cooling Option in A5 Staging. Added Orion VCCX.
March 2018
Added AAON Touchscreen Controller feature 8B. Updated Refrigerant Piping section to match
the DX Handbook. Added note about running variable capacity compressors at 100% for 1 minute
when starting. Updated Acceptable Refrigeration Circuit Values Table and notes. Updated piping
diagrams with 3-way reheat valve.
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