CA2202227A1 - Fuel-fired modulating furnace calibration apparatus and methods - Google Patents

Fuel-fired modulating furnace calibration apparatus and methods

Info

Publication number
CA2202227A1
CA2202227A1 CA2202227A CA2202227A CA2202227A1 CA 2202227 A1 CA2202227 A1 CA 2202227A1 CA 2202227 A CA2202227 A CA 2202227A CA 2202227 A CA2202227 A CA 2202227A CA 2202227 A1 CA2202227 A1 CA 2202227A1
Authority
CA
Canada
Prior art keywords
gas valve
blower
heat exchanger
furnace
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2202227A
Other languages
French (fr)
Other versions
CA2202227C (en
Inventor
Dennis R. Maiello
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheem Manufacturing Co
Original Assignee
Rheem Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rheem Manufacturing Co filed Critical Rheem Manufacturing Co
Publication of CA2202227A1 publication Critical patent/CA2202227A1/en
Application granted granted Critical
Publication of CA2202227C publication Critical patent/CA2202227C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/14—Differentiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/13—Measuring temperature outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/10—Ventilators forcing air through heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves

Abstract

A gas-fired air heating furnace has a modulatable supply air blower and a modulatable gas valve operatively connected to the combustion air heat exchanger burner. A calibration sequence of a microprocessor-based control system is utilized to automatically determine the precise relationship between the gas valve setting and the actual heat transferred by the heat exchanger to air flowing through the furnace by measuring the actual air temperature rise across the heat exchanger obtained using initial calibration settings of the blower and gas valve. The microprocessor uses the results of its calibration sequence to establish an adjustment correlation between the blower and gas valve settings which the microprocessor subsequently utilizes to adjust the flow rates of the blower and the gas valve in a manner maintaining a predetermined, generally constant air temperature rise across the heat exchanger while the furnace alters its overall air heating output rate in response to changing heating demands from the conditioned space served by the furnace.
CA002202227A 1996-10-09 1997-04-09 Fuel-fired modulating furnace calibration apparatus and methods Expired - Fee Related CA2202227C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/727,884 1996-10-09
US08/727,884 US5865611A (en) 1996-10-09 1996-10-09 Fuel-fired modulating furnace calibration apparatus and methods

Publications (2)

Publication Number Publication Date
CA2202227A1 true CA2202227A1 (en) 1998-04-09
CA2202227C CA2202227C (en) 2000-06-27

Family

ID=24924485

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002202227A Expired - Fee Related CA2202227C (en) 1996-10-09 1997-04-09 Fuel-fired modulating furnace calibration apparatus and methods

Country Status (3)

Country Link
US (1) US5865611A (en)
CA (1) CA2202227C (en)
NZ (1) NZ314562A (en)

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US8672670B2 (en) * 2009-11-11 2014-03-18 Trane International Inc. System and method for controlling a furnace
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US9249988B2 (en) * 2010-11-24 2016-02-02 Grand Mate Co., Ted. Direct vent/power vent water heater and method of testing for safety thereof
US8560127B2 (en) 2011-01-13 2013-10-15 Honeywell International Inc. HVAC control with comfort/economy management
US9086068B2 (en) 2011-09-16 2015-07-21 Grand Mate Co., Ltd. Method of detecting safety of water heater
US8876524B2 (en) 2012-03-02 2014-11-04 Honeywell International Inc. Furnace with modulating firing rate adaptation
US9964304B2 (en) * 2012-07-24 2018-05-08 Lennox Industries Inc. Combustion acoustic noise prevention in a heating furnace
US10802459B2 (en) 2015-04-27 2020-10-13 Ademco Inc. Geo-fencing with advanced intelligent recovery
US11287128B2 (en) * 2019-01-03 2022-03-29 Carrier Corporation Inward fired low NOX premix burner
US11320213B2 (en) * 2019-05-01 2022-05-03 Johnson Controls Tyco IP Holdings LLP Furnace control systems and methods
US11486576B2 (en) * 2019-08-23 2022-11-01 Regal Beloit America, Inc. System and method for burner ignition using sensorless constant mass flow draft inducers
US11739983B1 (en) 2020-09-17 2023-08-29 Trane International Inc. Modulating gas furnace and associated method of control
CN114252475B (en) * 2020-09-22 2023-10-17 宝山钢铁股份有限公司 Method for verifying efficiency of heat exchanger

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Also Published As

Publication number Publication date
CA2202227C (en) 2000-06-27
NZ314562A (en) 1999-04-29
MX9704958A (en) 1998-05-31
AU711676B2 (en) 1999-10-21
US5865611A (en) 1999-02-02
AU3998797A (en) 1998-04-23

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Effective date: 20140409