Title: Lab Assignment
Course: HET 130 Heating Residential Appliances > Section: HET 130 Heating Residential Appliances

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Lab Assignment

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Week 14 Lab Assignment: HVAC Maintenance

Recommended Materials

1. PPE
2. Hand Tools
3. Notepad
4. Clean and Check analysis form
5. Pencil
6. Gas Force-Air Furnace
7. VOM
8. Clamp-on ammeter

Scope

The student will develop skills in preventive maintenance. The student will start up and test a gas forced-air system to learn how to perform the task of testing a furnace to determine the corrective needs. The student will make and fill out a checklist form and make recommendations to the customer.

Procedures

1. Locate a gas furnace.
2. Turn the power source on.
3. Turn the thermostat above the room temperature.
4. As the furnace starts, record the sequence of operation.
5. Check the line and control voltage.
6. Check the igniter. (Record the Voltage)
7. Check the micro-amps of the flame sensor. (Record the micro-amps)
8. Check the pressure for the induced draft system. (Record the static pressure reading)
9. Check the high limit switch. (Record the tripping temperature)
10. Check the gas valve voltage and gas pressure. (Record the voltage and the gas pressure)
11. Check the temperature rise of the system.  (Record the temperature)
12. Check the blower motor amperage. (Record the amps)
13. Check the filter.

Research Questions

1. After making a chart with all your readings on it, what problems do you recognize?
2. What can you do to correct the problems?
3. What type of heating system did you test?
4. Will it make a difference in testing the furnace if it was a different type of furnace?
5. What recommendations can you make to help the system to run more efficiently?

Click on the file below to download the Lab Assignment
- HET 130 Wk 14 Lab.docx (17 KB)