An HVAC system having a diagnostics controller associated therewith

(19)

(11)

EP 2 816 295 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.01.2015 Bulletin 2015/03

(43)	Date of publication A2:
	24.12.2014 Bulletin 2014/52

(21)	Application number: 14160363.9

(22)	Date of filing: 17.03.2014

(51)

International Patent Classification (IPC):

F24F 11/00^(2006.01)

F24F 1/00^(2011.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

(30)

Priority:

17.06.2013 US 201313919590

(71)	Applicant: Lennox Industries Inc.
	Richardson, TX 75080 (US)

(72)	Inventors:
	Douglas, Jonathan Richardson, TX 75080 (US) Thomas, Herman M. Richardson, TX 75080 (US)

(74)	Representative: Williams, David John
	Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)

(54)	An HVAC system having a diagnostics controller associated therewith

(57) In one aspect, the present disclosure provides a controller for a HVAC system having an economizer with a damper and pressure sensors on opposing sides of the economizer. The controller comprise a diagnostics controller having a program configured to use pressure difference sensor data to determine if a pressure difference across the economizer is outside an operational design parameter of the HVAC system, and generate an error signal when the pressure difference is outside the operational design parameter.

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