Oil Burner Operation

Question 0

In low pressure oil burners the oil and air mixture is delivered to the nozzle at a pressure from?

Answer 0

1 to 15 psi

Question 1

What are the two principal elements of fuel oil?

Answer 1

Carbon and Hydrogen

Question 2

The air that contacts the oil prior to its leaving the nozzle is referred to as?

Answer 2

Primary air

Question 3

The introduction of air from the blower or fan into the combustion chamber after the oil has left the nozzle is referred to as?

Answer 3

Secondary Air

Question 4

Oil burners require approximately how many cubic feet of air per gallon of oil consumed?

Answer 4

2000 cubic ft of air

Question 5

A correctly adjusted oil burner flame will have an?

Answer 5

orange colored flame body with small red tips

Question 6

A red, smoky flame is an indication of?

Answer 6

a lack or air

Question 7

A white, almost dazzling flame is an indication of?

Answer 7

a great amount of excess air

Question 8

An insufficient air supply is one cause of?

Answer 8

dense, black smoke and soot

Question 9

an excessive air supply can?

Answer 9

blow out the flame

Question 10

Describe six conditions that will lead to improper operation of the oil burner system and to dangerous situations?

Answer 10

1. A defective oil cut-off valve can lead to after-drip. This is a very common condition. The oil drips into the combustion chamber when the burner is off, and the excessive oil is absorbed by the combustion chamber floor and walls. This cause the burner to be unusually noisy when it starts up or shuts down. It will eventually lead to a carbon deposit build-up and to a less efficient operation of the burner. After-drip is also dangerous in that it may lead to fire on the floor in front of the heating unit.
2. A leaking seal on the oil pump shaft bearing may also cause oil to leak on the floor in front of the heating unit. The leaked oil could become ignited also.
3. Dirty or damaged nozzles or rotary cups can cause improper atomization. This will eventually lead to a carbon deposit build-up in the combustion chamber. Nozzles in the no. 6 oil burner should be cleaned at least once a day.
4. Blockage in the chimney or flue passage will cause the cellar or boiler room to become filled with smoke.
5. Water in the fuel oil or the wrong grade of fuel oil will cause improper atomization.
6. The protective relay is supported to shut down the oil burner if a flame is not established quickly. A delay in ignition is the most common cause for burner puff-back. Puff-back can cause the boiler door to blow open and the smoke pipe to fall down.