Author Question: When is the igniter energized on an induced draft furnace that uses hot surface ignition? A) At ... (Read 64 times)

NguyenJ · **on:** Jul 24, 2018

When is the igniter energized on an induced draft furnace that uses hot surface ignition?

A) At the same time the induced draft blower is energized
B) After the draft switch closes to prove the draft
C) At the same time the gas valve is energized
D) On the initial call for heat

Question 2

Industry associations that establish national standards for the HVACR industry include:

A) ARI, ASHRAE, and UL.
B) AC Standards Association and the Heating Standards Symposium.
C) DOT, MSHA, and CE.
D) EPA, OSHA, and DOE.