Unit 32 oil heat

an upflow furnace

has the return air at the bottom

of the six regular grades of oil fuel the grade most commonly used in residential and Light commercial heating systems is number

2

how much heat is produced when two gallons of number 2 fuel are burned

140000 BTU

assuming 50% excess air is being provided how many cubic feet of air will be supplied to a oil burner to burn 1 lb of fuel oil

288 cubic feet

if oil is broken up to farm tiny droplets it is called

atomization

the motor on a residential gun type oil burner is usually a ___________ motor

split phase multi horsepower

the pump on a residential gun type oil burner is a ____________ pump

single stage or two stage

the fuel oil enters the orifice nozzle through the

swirl chamber

the circular direction of air in the air tube is in _______ direction as the fuel oil motion

the opposite

the ignition Transformer steps up the 120v residential voltage to approximately____________ v

10000

the stack switch or relay

shuts down the burner if it does not sense heat in the flue products

the cad cell is a safety device that

senses light in the combustion chamber

a booster pump is often needed when oil supply tank is ________below the oil burner

15 ft or more

and oil deaerator

allows a one pipeline oil delivery system to operate as a to pipeline oil delivery system

a flu Line Filter is located between

Supply tank and the pump

the heat exchanger in a forced air oil fired furnace

transfers heat from the flue gases to the air to be heated and circulated and keeps them separate

a condensing oil furnace achieves part of its higher efficiency because of a______ Exchange

latent heat

excess air supplied at the burner to ensure that there will be

enough hydrocarbons for complete combustion

how much excess air is supplied to the system to ensure that complete combustion

50%

to perform combustion efficiency tests a hole must be made

in the flu on the furnace side of the draft regulator

the net stack temperature is

the difference between the flu temperature in the temperature of the air surrounding the furnace

a air temperature rise check is performed to determine

whether or not the airflow is correct across the heat exchanger

what hydrocarbons unite rapidly with oxygen it is called

combustion

assuming perfect combustion how many pounds of oxygen are required to burn 1 pound of fuel oil

3.00lb

the cad cell is often coupled with a

triac