Gas Furnace Operation and Components

This HVACR training video covers the intermittent pilot ignition system on a gas furnace. It explains the operation of the system, including flame ignition, voltage and pressure measurements, and troubleshooting steps. The video also details the flame rectification process and provides guidance on adjusting and measuring gas pressure. Additional resources and learning materials are available for further study.

What is the primary function of a digital water column manometer in the context of a gas furnace?

• To measure humidity levels

• To measure temperature

• To measure electrical resistance

• To measure outlet gas pressure

Which component is responsible for controlling the ignition process in a gas furnace?

• Intermittent pilot ignition control module

• Multimeter

• Digital water column manometer

• Thermostat

What is the purpose of the flame rollout switch in a gas furnace?

• To measure gas pressure

• To prevent gas leaks

• To detect flame presence

• To cut off power if flame rolls out

What should be checked first if there is no flame but a call for heat is present?

• Gas pressure

• Voltage at the control module

• Thermostat settings

• Pilot tube alignment

What is the role of the spark rod in the flame rectification process?

• To measure gas pressure

• To control the thermostat

• To adjust the pilot flame

• To act as a flame sensor

Why is it important to keep metal surfaces clean in the ignition system?

• To reduce noise

• To ensure proper electrical conductivity

• To improve airflow

• To prevent gas leaks

What could cause the pilot ignition gas valve to keep trying to ignite the pilot even if it is already lit?

• Clogged burner tube

• Faulty thermostat

• Low gas pressure

• Inability to prove flame presence

What tool is used to adjust the pilot flame if it does not envelop the rod properly?

• Ratcheting surface wrench

• Digital water column manometer

• Flathead screwdriver

• Multimeter

What is the correct pressure range for the outlet of a propane gas valve?

• 14 to 16 inches of water column

• 11 to 13 inches of water column

• 8 to 10 inches of water column

• 5 to 7 inches of water column

What might be the issue if the flame rollout switch trips?

• Incorrect thermostat settings

• Bad draft or cracked heat exchanger

• High gas pressure

• Faulty multimeter