HVAC-R Service Calls Volume 3- An Interactive Training Series on CD-ROM and Networks

HVAC-R Service Calls Volume 3
Interactive Training Series

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Audience:
Anyone interested in pursuing a career or furthering their career as an HVAC-R Technician.

Average
Training Time:

2 to 3 hours per volume NOTE

Format/
Product Code:
CD-ROM (MPEG Video)/ DLMRHVC

Produced by:
Delmar Thompson Learning

TOPICS
This volume presents interactive instruction covering the following topical areas:

Electric Heat Service Calls

Intro to Electric Heat Service Calls
Electric Heat System Components
Relay Contactors and Sequencers
Troubleshooting Steps: Bad time delay relay
Troubleshooting Steps: Bad fuses

Gas Heat Service Calls

Intro to Gas Heat Service Calls
Gas Heating System Basics
Troubleshooting Steps: Short cycling
Troubleshooting Steps: Not working

Heat Pump Service Calls

Intro to Heat Pump Service Calls
Troubleshooting Steps: Not enough heat
Troubleshooting Steps: Heating instead of cooling

Oil Heat Service Calls

Intro to Oil Heat Service Calls
Troubleshooting Oil Furnace Problems
Troubleshooting Steps: No heat
Troubleshooting Steps: Not heating

PERFORMANCE OBJECTIVES
This course will measure mastery on each of the following performance objectives. Upon completion, workers will be able to...

Troubleshoot Electric Heat Furnace Problems

Explain which speeds the furnace blower is designed to run on during heating and cooling.
Recall how many BTUs are generated by one watt of electrical energy.
Identify the control that shuts off the heating element if it gets too hot.
Identify the safety device that shuts off the heating elements if the fan switch should fail.
Explain how the heating elements are energized.
Explain how the relays are energized.
Explain how the blower is energized.
Explain how the sequencers are energized.
Recall how many CFM of air are required for heating and air conditioning.

Troubleshoot Gas Heat Furnace Problems

Recall that older gas furnaces used standing pilot systems.
Explain how the heat anticipator works.
Explain how the heating circuit can be energized.
Explain how the temperature rise of the furnace is determined.
Identify the formula to check for proper air flow.
Recall how many times a gas furnace with an HIS system will try to ignition before locking out.
Identify the first component to be energized on a furnace that has an HIS system.
Explain how the combustion chamber is purged.
Recall when the main gas valve is energized.

Troubleshoot Heat Pump Problems

Identify the reversing valve.
Recall where the discharge gas is sent during the heating mode.
Recall where the discharge gas is sent during the cooling mode.
Identify where the liquid refrigerant is metered during the heating mode.
Identify where the liquid refrigerant is metered to during the cooling mode.
Explain why heat pumps require a defrosting cycle.
Explain how the refrigerant changes in the outdoor coil.

Troubleshoot Oil Heat Furnace Problems

Identify the control that proves combustion of oil has taken place.
Recall the resistance value of a good cad cell.
Recall that the primary control provides 24 volts across the T-T terminals.
Describe a primary control that has interrupted ignition.
Explain how the burner motor and ignition transformer are energized.
Explain how the primary control works.
Recall that the cad cell lead wires are wired to the F-F terminals of the primary control.
Explain how the safety switch of the primary control works.
Recall when the primary control safety switch will trip reset button.