HVA 140 RESIDENTIAL HEATING

Transcription

1 HVA 140 RESIDENTIAL HEATING PRESENTED AND APPROVED: AUGUST 9, 2012 EFFECTIVE: FALL

2 Prefix & Number HVA 140 Course Title: Residential Heating Purpose of this submission: New X Change/Updated Retire If this is a change, what is being changed? Update Prefix X Course Description (Check all that apply) Title Course Number Format Change Credits X Prerequisite Competencies Textbook/Reviewed Competencies-no changes needed Does this course require additional fees? X No Yes If so, please explain. Is there a similar course in the course bank? X No Yes (Please identify) Articulation: Is this course or an equivalent offered at other two and four-year universities in Arizona? X No Yes (Identify the college, subject, prefix, number and title: Is this course identified as a Writing Across the Curriculum course? X No Yes Course Textbook, Materials and Equipment Textbook(s) Title Refrigeration and Air Conditioning Technology, 7 th edition Author(s) Whitman, Johnson, Tomczyk Publisher Cengage ISBN Software/ Equipment Modality Check all that apply Title Author(s) Publisher ISBN N/A X On-ground On-line Hybrid ITV Web-enhanced Course Assessments Description of Possible Course Assessments: Exams standardized for this course? Midterm X Final X Other (Please specify): Weekly tests Where can faculty members locate or access the required standardized exams for this course? Student Outcomes: Identify the general education goals for student learning that is a component of this course. Quizzes, tests, written homework assignments, lab assignments, lab final examination and written final examination. Are exams required by the department? No X Yes If Yes, please specify: Lab and written final examination Ken Kramer, Instructor, BHC Campus 1. Learn to recognize, describe, and diagnose the most common residential

3 heating systems that are used in the different regions of the country. 2. Learn to analyze the use of those different systems in terms of installation and use costs, efficiency, and environmental impact. 3. Learn to electrically and mechanically troubleshoot electrical, gas, and heat pump 4. Learn how to analyze and understand the factors that contribute to indoor air quality as it relates to residential heating Check all that apply: 1. Communicate effectively. a. Read and comprehend at a college level. X b. Write effectively in a college setting. Method of Assessment Complete weekly reading assignments and then complete written homework assignments based on those reading assignments. 2. Demonstrate effective quantitative reasoning and problem solving skills. X Complete mathematical calculations to determine the quantity of BTUs per hour output and supply airflow of various types of heating 3. Demonstrate effective qualitative reasoning skills. X Complete analysis and troubleshooting procedures used to diagnose various types of heating 4. Apply effective methods of inquiry. a. Generate research paper by gathering information from varied sources, analyzing data and organizing information into a coherent structure. b. Employ the scientific method. 5. Demonstrate sensitivity to diversity a. Experience the creative products of humanity. b. Describe alternate historical, cultural, global perspectives. Office of Instruction Use only: CIP Code: ONET Code: Minimum Qualifications:

4 COURSE INFORMATION Initiator: Ken Kramer, Frank Port Date of proposal to Curriculum Sub-Committee: August 9, 2012 Effective Semester/Year Fall 2013 Prefix & Number: HVA 140 Full Title: Residential Heating Short Title: Heating Catalog Course Description: Focuses on the maintenance and repair of residential heating systems, including chimneys, vents, and flues. Troubleshooting procedures for gas-fired, electrical heating systems, heat pump systems, as well as the related control circuits and ducting systems will be emphasized. Alternative types of heating sources including solar, hydrothermic, and water-source heat pumps will also be discussed. SUN Course Number: Credit Hours: 2 Lecture Hours: 1 Lab Hours: 2 Prerequisite(s) Successful completion of HVA 105 or permission of academic chair Co-requisite(s) Intended Course Goals By the end of the semester, students will be able to: 1. Recognize, describe, and diagnose the most common residential heating systems that are used in the different regions of the country. 2. Analyze the use of those different systems in terms of installation and use costs, efficiency, and environmental impact. 3. Electrically and mechanically troubleshoot electric, gas and heat pump 4. Analyze and understand the factors that contribute to indoor air quality as it relates to residential heating

5 Course Competencies and Objectives By the end of the semester, students will be able to: Competency 1 Analyze the use of various electrical heating devices, including electrical furnaces, portable heating and radiant panels, baseboard heating, and electrical forced air heating systems, and demonstrate appropriate preventative maintenance and basic troubleshooting techniques for each type of system. Objective 1.1 Discuss and analyze the efficiency and relative operating costs of electric heat. Objective 1.2 List types of electric heaters and describe their uses. Objective 1.3 Describe how sequencers operate in electric forced-air furnaces. Objective 1.4 Demonstrate how to correctly trace the circuitry in a diagram of an electric forced-air furnace. Objective 1.5 Perform basic tests in troubleshooting electrical problems in an electric forced-air furnace. Objective 1.6 Describe typical preventive maintenance procedures used in electric heating units and Objective 1.7 Demonstrate the proper precautions that pertain to electrical safety required when servicing electrical heating Competency 2 Describe the different types of gas-fired heating systems, including gas fuels, properties of combustion, system components and air flow, and demonstrate appropriate preventative maintenance and basic troubleshooting techniques for gas fired furnace Objective 2.1 Describe each of the major components of a gas furnace and analyze their function. Objective 2.2 List the common fuels burned in gas furnaces and describe characteristics of each. Objective 2.3 Describe a multi-poise furnace and its safety devices, and analyze the advantages and disadvantages of the system. Objective 2.4 Describe the use of flame rollout switches, auxiliary limit switches, and draft safeguard switches. Demonstrate troubleshooting techniques for each Objective 2.5 Discuss gas-pressure measurement in inches of water column and describe how a manometer is used to make this measurement. Objective 2.6 Discuss gas combustion. Objective 2.7 Describe a solenoid, diaphragm, and heat-motor gas valve. Objective 2.8 List the functions of an automatic combination gas valve. Objective 2.9 Describe the function of a servo-operated gas pressure regulator. Objective 2.10 Discuss the meaning of a redundant gas valve. Objective 2.11 Discuss different gas burners and heat exchangers. Objective 2.12 Describe the difference between induced draft and forced draft Objective 2.13 Describe and discuss different ways of controlling the warm air fan. Objective 2.14 State the function of an off-delay timing device for a warm air fan control. Objective 2.15 Describe the standing pilot, intermittent pilot, direct spark, and hot surface ignition Objective 2.16 List three flame-proving devices and describe the operation of each. Objective 2.17 Discuss reasons and the systems used for the delay in starting and stopping the furnace fan. Objective 2.18 State the purpose of a limit switch. Objective 2.19 Describe flu-gas venting Objective 2.20 Discuss flame rectification and how it pertains to a local and remote flame sensing.

6 Objective 2.21 Apply flame rectification troubleshooting and maintenance procedures. Objective 2.22 Describe the anatomy of a high-efficiency gas furnace. Objective 2.23 Describe direct vented, non-direct vented, and positive pressure venting Objective 2.24 Explain dew point temperature as it applies to a high-efficiency condensing furnace. Objective 2.25 Discuss excess air, dilution air, combustion air, primary air and secondary air. Objective 2.26 Discuss the condensate disposal system of a high-efficiency condensing gas furnace. Objective 2.27 Identify furnace efficiency ratings. Objective 2.28 Describe electronic ignition modules and integrated furnace controllers (IFC). Objective 2.29 Describe a two-stage furnace, modulating gas furnace, and variable output thermostat. Objective 2.30 Discuss gas piping as it applies to gas furnaces. Objective 2.31 Interpret gas furnace wiring diagrams and troubleshooting flow charts or guides. Objective 2.32 Compare the designs of a high-efficiency gas furnace and conventional furnace. Objective 2.33 Describe procedures for taking flu-gas carbon dioxide and temperature readings. Objective 2.34 Describe typical preventive maintenance procedures. Competency 3 Discuss the physical characteristics of oil furnaces, including types of fuel, components of the oil burner, wiring diagrams, and safety controls. Objective 3.1 Describe how the fuel oil and air are prepared and mixed in the oil-burner unit for combustion. Objective 3.2 List the byproducts produced as a result of combustion of the fuel oil. Objective 3.3 List the components of gun-type oil burners. Objective 3.4 Describe basic service procedures for oil-burner components. Objective 3.5 Sketch wiring diagrams of the oil-burner primary control system and the fan circuit. Objective 3.6 Describe the testing procedures used to determine oil-burner efficiency. Objective 3.7 List and explain the corrective actions that may be taken to improve burner efficiency, as indicated from the results of each test. Objective 3.8 Describe preventive maintenance procedures. Objective 3.9 Demonstrate proper safety procedures when starting a burner. Competency 4 Describe and analyze the primary sources of indoor air pollution, including mold, and discuss the use of ventilation, ultraviolet light, filters, and other devices to control indoor air quality Objective 4.1 Discuss the primary sources of indoor air pollution, explain how health can be impacted by these sources. Objective 4.2 Describe procedures for eliminating contamination sources. Objective 4.3 Describe how molds reproduce. Objective 4.4 State two substances needed for mold to grow. Objective 4.5 Discuss ventilation as it applies to indoor air quality. Objective 4.6 Describe air cleaning devices Objective 4.7 Discuss reasons for cleaning air ducts. Objective 4.8 Explain relative humidity. Objective 4.9 State reasons for providing humidification in winter months. Objective 4.10 Describe various types of humidifiers.

7 Objective 4.11 State reasons for installing self-contained humidifiers. Objective 4.12 List general factors used when sizing humidifiers. Competency 5 Describe the use of reverse-cycle refrigeration and the four way valve for heating applications. Objective 5.1 Describe the function of a reverse-cycle heat pump. Objective 5.2 List the primary components of a reverse-cycle heat pump, and describe their purpose. Objective 5.3 Describe how a four-way valve is used in heat pump Objective 5.4 List and describe the primary sources utilized for heat pumps. Objective 5.5 Compare and contrast electric heat to a heat pump. Objective 5.6 Describe how heat pump efficiency is rated. Objective 5.7 Demonstrate the procedures for determining whether a heat pump is in cooling or heating modes. Objective 5.8 List and describe the basic components of heat pump Objective 5.9 Define coefficient of performance and analyze its importance. Objective 5.10 Explain the concept of auxiliary heat. Objective 5.11 Describe the control sequence used with air-to-air heat pumps. Objective 5.12 Describe and analyze new techniques being used to improve the efficiency of heat pump Objective 5.13 Discuss recommended preventive maintenance procedures for heat pump Objective 5.14 Demonstrate the use of proper Personal Protective Equipment when installing insulated ductwork or working around fiberglass. Competency 6 Describe the use of open and closed loop heat pump systems, and discuss the use of ground loop, geothermal and water wells. Objective 6.1 Describe an open- and closed-loop geothermal heat pump system. Objective 6.2 Explain how water quality affects an open-loop geothermal heat pump. Objective 6.3 Describe the use of ground-loop configurations for closed-loop geothermal heat pump Objective 6.4 Analyze the advantages and disadvantages of series and parallel flow configurations in geothermal heat pump Objective 6.5 List and describe the different system fluids and heat-exchanger materials. Objective 6.6 Describe different geothermal well types and water sources for heat pumps and analyze the advantages of each type. Objective 6.7 Explain some of the most common service problems encountered with geothermal heat pump Objective 6.8 Describe the use of the governing formula that calculates the amount of heat rejected or absorbed by the water side of a geothermal heat pump. Objective 6.9 Describe a waterless, earth-coupled, closed-loop geothermal heat pump system. Objective 6.10 Describe the proper PPE (personal protective equipment) required when working with geothermal heat pumps. Competency 7 Describe the basics of hydronic heating, including the components used Objective 7.1 Define and analyze the concept of hydronic heating. Objective 7.2 Describe the use of zones in hydronic heating Objective 7.3 List the heat sources used for hydronic systems and analyze their advantages and disadvantages Objective 7.4 Describe the use of limit controls, low-water cutoff devices, pressure relief valves, and expansion tanks.

8 Objective 7.5 Describe a finned-tube baseboard unit, a one-pipe and two pipe hydronic system, and a two-pipe reverse system. Objective 7.6 List and describe the preventative maintenance procedures required for hydronic systems Objective 7.7 Describe the appropriate safety precautions needed when servicing hydronic heating