The typical start up sequence for a hot surface ignition system is
A) Combustion blower, indoor blower, igniter, and gas valve all energized simultaneously
B) Combustion blower energized, igniter energized and gas valve energized, flames sensed, indoor blower energized after time delay
C) Combustion blower pre-purge, igniter energized after a delay, gas valve energized after a delay, flames sensed, indoor blower energized after time delay
D) Gas valve and igniter energized, flames sensed, combustion blower and indoor blower energized after time delay
C
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a. del conducto de suministro b. de la unidad de manejo de aire c. del aire circundante d. ideal del aire circundante
Materials that absorb fluids are permeable.
Answer the following statement true (T) or false (F)
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A) Technician A B) Technician B C) Both technicians D) Neither technician
Drainback systems can use either unpressurized or pressurized thermal storage tanks.?
Answer the following statement true (T) or false (F)