Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
36 Cards in this Set
- Front
- Back
|
Two types of components used for ignition systems in oil burners are |
The ignition transformer The solid state igniter |
|
|
Ignition transformer steps up voltage to have an output of what |
10000 volts |
|
|
The solid-state ignitor produces an electrical output of |
14000 - 20000 volts peak |
|
|
Oil burners use one of two types of electric ignition control systems |
Interrupted ignition Intermittent ignition |
|
|
The ignition spark remains on for only a short time at the beginning of each burner cycle when using |
Interrupted ignition |
|
|
The spark that ignites the oil vapors remains on as long as the burner runs when using |
Intermittent ignition |
|
|
6 advantages that interrupted ignition has over intermittent ignition |
Increased electrode life
Increased igniter or ignition transformer life
Decreased electrical consumption
Decreased operational noise
Does not hide combustion problems
Nitrogen oxide emissions are lower
|
|
|
What's the definition of an AC transformer |
A device that receives electricity at one voltage and delivers it at another voltage either higher or lower |
|
|
In a transformer the winding that receives the electrical energy from the power source is called |
The primary |
|
|
In a transformer the winding that delivers electrical energy is called |
The secondary |
|
|
If the secondary winding delivers voltage that is higher than the primary then it is known as a |
Step up transformer |
|
|
What is the factor that determines whether transformer is a step up or step down |
The relative number of turns in the primary and in the secondary windings |
|
|
Transformers that are used for ignition purposes in oil burners are |
Step up transformers |
|
|
Generally ignition transformers will be made up of a turn ratio of what |
90 to 1 |
|
|
A transformer is filled full of what substance |
Tar |
|
|
What substance is a solid state igniter filled with |
Epoxy |
|
|
When ordering replacement transformers what must you look out for 6 items |
1: the size of the mounting base and location of mounting holes 2: the position of terminals 3: the style of transformer high tension clips 4: secondary coil voltage 5: primary coil voltage 6: transformer body size |
|
|
Primary controls with three wires in the back( white, black, orange) is always |
Intermittent ignition |
|
|
Primary controls with four wires in the back can be hooked up either |
Intermittent or interrupted ignition |
|
|
The formula for spark heat energy is |
Voltage times current |
|
|
You must provide temperatures between what Fahrenheit to ignite atomized number 2 fuel oil |
Between 600 and 700 degrees Fahrenheit |
|
|
Iron core ignition transformers are sensitive to voltage |
Drop |
|
|
Four drawbacks of the ignition transformers |
They're insulated with tar Their windings are susceptible to moisture They use 80 to 100 watts of electricity They deteriorate over time |
|
|
Igniters use a solid state printed board with what is called |
Tank mechanism |
|
|
igniters have a more constant output if input voltage decrease |
True |
|
|
If an ignitor is tested by bringing the secondary terminals together, how far apart should they be |
1/2 inch to three quarters of an inch |
|
|
Electrical consumption from an igniter is |
30 to 50 watts |
|
|
The first basic test for igniters is to place an ohmmeter across the igniter output terminals with the power off and measure resistance from each ignitor to ground. What should the difference in resistance from each post to ground be |
No more than 10% between posts |
|
|
Resistance testing of the transformer across the primary windings . Attach the test leads from your ohm meter to the primary leads of the transformer what should you be reading |
3 ohms plus or minus 10% |
|
|
To test the secondary side of the transformer touch one of your ohmmeter leads to a secondary terminal and the other to a mounting screw or ground what should your readings be |
12000 ohm plus or minus 10% |
|
|
What three ways may be used to transport high voltage of the secondary terminals of the ignition transformer |
The ignition cable
Buss bars
Spring type conductors |
|
|
The outstanding feature of ignition cables is |
Flexibility |
|
|
Describe bus bars |
Non-insulated heavy gauge strips of metal |
|
|
Spring clips are simular to the bus bars except that contact of the transformer is maintained by |
Spring tension |
|
|
Electrode tip should never be permitted to touch or extend into |
The oil spray because it will cause a carbon bridge to build up |
|
|
The general settings for electrodes should be |
5/32 gap. 5/16 above center. 1/16 in front of nozzle |
