Trane International Inc.

James T Schaefer, Jr

Alan Dale Marble

Kevin B Mercer

Robert Wayne Helt

Jonathan David Douglas

Timothy Wayne Storm

Gordon Jeffrey Hugghins

John Raymond Edens

Jie Song

Steven A Tice

John Tanner Taylor

Gary Lee Sapp

Stephen Kowalski

Kristen L Schaefer

W Randall Erwin

Bruce David Montgomery

A system and a method are provided for returning oil in a heating, ventilation, and air conditioning (HVAC) system by determining when an ambient zone temperature is equal to or less than a temperature limit and reversing a direction of refrigerant flow of the HVAC system based on the length of time. Also, a system and a method are provided for monitoring the length of operation in a first and a second heating mode and for reversing a direction of refrigerant flow based on the length of time operation occurs in the first and second heating modes. A system and a method having a first compressor, a first heating mode, a second heating mode, a defrost mode, and a controller is disclosed. The controller selectively controls initiation of the defrost mode in response to an HVAC system operating in a heating mode of operation for a predetermined amount of time.

System and method for oil return in an HVAC system

HVAC apparatus is configured to include a control system with a controller which may be connected directly to a personality module for transferring information stored in the controller related to historic operating conditions of the apparatus to the module, or information may be transferred to the controller from the module to configure the controller for operation of the apparatus at selected operating conditions of temperature, pressure and blower motor speed, for example. The personality module includes a memory circuit and a connector for releasably connecting the module to the control system of the apparatus for transferring information between the module and the controller.

Device and method for recording air conditioning system information

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Tyler, TX, United States of America

James T Schaefer, Jr