Herzing College Skilled Trades
Gas Technician 2 Training

In this module, students will work with various piping & tubing systems. Based on the size of the system, they will explore topics such as number of appliances, specific gravity, allowable pressure drop, proper fitting etc. They will perform various duties such as welding, marking, preparing pipe, cutting, grinding, and testing. They will explore welding certification requirements and procedures to ensure safe handling and operating applications. Other topics include maintenance and repair, review codes, types of valves etc.

In this module, students will examine various concepts associated with electricity. Some of these include amperes, various fuses & breakers, current GFCI’s etc. Students will work with various types of gauges of wires; how to conductors are sized to carry different maximum currents. Based on the application, students will determine the type of insulation required on a conductor. Students will examine various diagrams & schematics representing an electrical application. Students will select the appropriate testing & measuring equipment based on various setups & conditions.

In this module, students will work with both electrical & mechanical controls. They will explore fundamental concepts of each, identify various components, functions, types, and operations. They will employ various troubleshooting techniques to identify, test, diagnose, recommend and replace effective components in electrical and mechanical circuits.

In this module, students will explain the key components of the building as a system and how they impact on heat, moisture and air flow. They will describe building science principles as they relate to heat, moisture and air flow in the building. Students will explain ways of incorporating energy conservation measures into building construction and renovation. In addition, students will explain how mechanical systems affect heat, moisture, and air flows of a building.

Students will install and service various ranges, clothes dryers and barbeques. They will review code related to the proper hook-up of gas piping to gas ranges. Students will test operating and supply pressures, follow manufacturer’s specifications for service. Describe and identify the operating parameters and controls, interpret wiring and schematic diagrams. Students will select appropriate testing equipment for each application.

Students will operate on cylinders, tanks, gas meters, pressure regulators, and relief valves. They will explain the purpose of propane and natural gas regulators, describe types of pressure regulators, and determine sizing requirements and venting procedures. Students will use appropriate testing equipment to test for leaks and malfunctions. They will perform installation procedures according to code and to the manufacturer’s specifications.

Students will describe the fundamentals of operation of propane/natural gas refrigerators. They will review manufacturer’s instructions and review code requirements. They will name the 3 main elements and the 3 distinct fluid circuits in a gas and propane refrigerator. Students will describe proper air circulation and interpret troubleshooting charts. They will describe possible causes of malfunction, the installation procedures, and describe cleaning and annual servicing procedures.

Students will determine if conversion is possible, according to boiler and furnace type. They will describe the methods to check for air, fuel, gas and water leaks using appropriate sealant. They will clean both the boiler and the furnace. They will describe the theory of combustion and identify the factors that affect combustion such as dirty heat exchangers, excess air supply, and draft conditions and overfiring the appliance.

Students will examine various types of water heaters and combination heating systems. They will describe and identify the different components of a water heater and combination system and describe testing procedures. Students will apply various electrical troubleshooting techniques to determine the integrity and operation of electrical and mechanical controls and components.

Students will install forced air furnaces. They will apply all local by-laws, permits, codes etc. to complete the installation. They will demonstrate electrical procedures, sheet metal procedures, set-up and activate appliance “mid or high” furnace, describe the mechanical and electrical components of forced air heating systems, service a fan assembly, demonstrate the use of diagnostic equipment and perform mechanical tests.

Students will replace/install and activate a hydronic heating system. The student will be required to prepare the site, use appropriate code and follow manufacturer’s instructions to correctly replace and/or install a hydronic boiler, connect boiler to an existing gas and water system, make proper venting connection and activate the system. Students will also apply troubleshooting techniques to determine electrical and mechanical pump malfunctions.

Students will define procedures, dismantle and reassemble space heating and decorative appliances. They will describe flame adjustments, flame characteristics, troubleshoot electrical systems and meters and insert electrical faults in space heater or decorative appliances.

Students will examine and identify each sample of approved venting material using the labels and course reference material. In addition, the student will install the vent connector for a draft hood vent appliance. Students will install the vent system for a power vented water heater, install the vent system for a category 1 furnace, category 3 furnace, and assemble vent system components for a side wall vented appliance.

Students will measure the return air ductwork both horizontally and vertically, determine the overall dimensions of the accessory device to be installed, and determine the dimension between the supply and return plenum. The students will be provide with a particular appliance, tape measure, installation instructions for the air cleaner, the appliance manufacturers’ electrical drawing for the forced air furnace, and the tools necessary to install the electronic air cleaner. The student must shoe knowledge of the component parts, explain their purpose, and determine if the electronic air cleaner is producing the correct output voltage.

Students will check the air temperature and air flow across an air handler. They will use a temperature measure device, air flow measuring device and a manometer, values for temperature rise and air flow quantities will be determined. Students will be able to identify any restriction points by a visual inspection of the appliance any add-on devices as well. They will assess existing ductwork, air filtration device, humidifier and sheet metal components to determine furnace removal requirements.