Electronic Ignition Systems Flashcards
Interrupted Pilot Ignition System
The main burner and pilot are off during standby
Intermittent Pilot Ignition System
The pilot is on when the main burner is on
Difference between a dual rod and single rod burner ignition system
Dual Rod: has one rod for ignition and one rod for flame sensing
Single Rod: One rod is the ignitor and the flame sensor
Recommended spark gap?
1/8”
What are two types of HSI?
Silicone Carbide & Silicon Nitride
What is the downside of using flame conductivity as a flame sensor?
Can not tell the difference between a flame or a short circuit.
Yellow Tip Flame - Cause
Not enough air/airflow
Lifting Flame - Cause
Too high velocity
Waving Blue Flame - Cause
Drafts/ Air blowing on burner/ Cracked Heat Exchanger
Flashback - Cause
Not Enough Gas Pressure
Main Burner Flame too large - Cause
too much gas
Noisy Flame - Cause
Too high velocity
CO ppm allowed exposure in 8 hrs
50
CO ppm fatal in less than one hour
4000+
Blower fan speed for heat
Medium/Low
Combination Gas Valve includes what 3 components
Solenoid Valve, a diaphragm valve & a pressure regulator
What’s included in Connection Wiring diagrams
Colour of the wires, location of components, location of wires
What’s included in schematic/ladder wiring diagrams
How the appliance works, helpful when troubleshooting
What type of control retries ignition more than once
Recycling control
Yellow Tip Flame - Reason
Little primary air, blocked flue/ burner port, dirty orifice, misaligned orifice, orifice too large
Lifting Flame - Reason
Too much primary air, burners overfired, orifice too large
Waving Blue Flame - Reason
Excessive draft around the burner, cracked heat exchanger
Flashback - Reason
Too much primary air, burners underfired, orifice to large or to small, gas valve leaking
Main Burner flame too large - Reason
Burners overfired, defective regulator, burner orifice too large
