US 2013/0158717 A1 · HVAC CONTROLLER WITH DELTA-T BASED DIAGNOSTICS

Abstract

An HVAC controller may store a delta T limit. The delta T limit may be, or may include, a maximum and/or a minimum delta T limit. The HVAC controller may compare a measured delta T value against a delta T limit to determine if the delta T limit has been violated. If the HVAC controller determines that a delta T limit has been violated, the HVAC Controller may log the violation, and in some cases, display a user alert on a display of the HVAC controller. In some cases, different delta T limits may be stored for each operating mode (e.g. heating and cooling), and in some cases, for each stage combination within an operating mode, where appropriate.

Claims20

Dependent claims

An HVAC controller configured to control one or more components of an HVAC

system, the HVAC controller comprising;
a user interface including a display;
a memory;
an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system;
and
a controller coupled to the memory, the user interface and the I/O block, the controller programmed to accept a delta T limit via the user interface of the HVAC controller;
the controller further configured to monitor one or more signals received via the I/O block to determine if the delta T limit has been violated, indicating a delta T fault, and to display on the display of the HVAC controller a user alert for at least some detected delta T faults.

4 more elements

Dependencies are inferred from the claim text.

Hvac controller with delta-t based diagnostics

Life of this patent

Hvac controller with delta-t based diagnostics

Life of this patent

Abstract

Claims20