May 2018
Updated technical support contact information.
June 2018
Updated E-coated coil cleaning procedure. Added split system evacuation procedure for low
ambient and modulating hot gas reheat.
November 2018
Added Feature Options N = ECM Condenser Fan Head Pressure Control + Low Sound Condenser
Fan & S to Feature 13. Added Standard Evacuation Instructions & Low Ambient & Modulating
Reheat System Evacuation Instructions to Installation section. Updated Special Low Ambient
Option Charging Instructions and the LAC Valve Piping Schematic figure.
February 2019
Changed WattMaster to Orion. Added Do Not Overcharge note to Acceptable Refrigeration
Circuit Values table.
May 2019
Added the minimum/maximum voltage range table in the Electrical section.
July 2019
Removed most references to PVE oils except in the caution boxes.
October 2019
Updated mounting section to clarify spring isolation mounting instructions.
April 2020
Minor changes to wording for print.
August 2020
Revised compressor cycling to 3 minute minimum off time. Revised measurement of suction line
temperature and pressure to be taken at the evaporator. Revised wording for oil return line.
Updated the Nameplate Voltage Markings and Tolerance table. Updated phase imbalance
example. Revised the e-coated coil cleaning section. Added Voltage check to the startup form.
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
run. Added Enviro-Coil Cleaner.
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