Oil Burner study guide with complete solutions

What is a cad cell? - Answer- Visual flame detector What does "in-step" mean? - Answer- The primary control start circuit is closed What is the voltage found at the TT terminals? - Answer- 24 volts What are the 8 steps on a no heat call? - Answer- Main fuse, oil burner fuse, customer emergency switch, oil tank, oil valves, high limit, thermostat, primary control. How much air is necessary to burn a gallon of #2 fuel oil? - Answer- 1540 cubic ft What is the normal pump pressure? - Answer- 100 psi How is combustion achieved? - Answer- Proper amount of oil, air, and ignition What is primary air? - Answer- Air mixed with oil before the nozzle. It is the atomizing air found on in low pressure burners. What is secondary air? - Answer- Fan air Does firbebrick come in different heat ratings? - Answer- Yes How should an oil tank be supported? - Answer- Rigid, non-combustable supports What is the wire gauged used on oil burner circuits? - Answer- 14 gauge min How is an oil burner wired? - Answer- Series; intermittent or interrupted. What does intermittent mean? - Answer- The transformers stays on throughout the burner cycle What does interrupted mean? - Answer- The transformer drops out after flame is established. Who approves oil burners in MA? - Answer- Any approved national testing lab What does the term Marshall mean? - Answer- State Fire Marshall What size vent pipe is required with a 2 inch fill pipe? - Answer- 2" min Can a vent pipe on an oil tank be smaller than the fill? - Answer- No, it can be larger but not smaller What is the minimum size of vent and fill pipes? - Answer- 1 1/4" Explain interrupted ignition - Answer- Transformer drops out after the flame is established What permits are available? - Answer- Install, store oil, and tank removal What are the elements found in fuel oil? - Answer- 85% Carbon and 15% Hydrogen What is fuel oil? - Answer- Hydro-carbon How must fuel oil be prepared for combustion? - Answer- It is atomized or vaporized and mixed with air What is a BTU? - Answer- The amount of heat necessary to rain 1 lb of water 1 degree Fahrenheit How many BTU's are in a gallon of #2 fuel oil? - Answer- 140,000 What determines the GPH of a nozzle? - Answer- The orifice What is a series circuit? - Answer- the current has only one path to travel What is a degree day? - Answer- 65 degrees F minus the daily average temp What is the flash point of #2 fuel oil? - Answer- 110 degrees Fahrenheit Can materials other than steel be used for fuel oil tanks? - Answer- Yes, if approved What does the word "approved" mean? - Answer- Accepted b y the Marshall of by the laboratory which is accepted by the Marshall When is a combustion efficiency test required by law? - Answer- After installs and routine maintenances What control shorts off the oil burner in the event of excessive temp in the appliance - Answer- High limit Name 3 functions of an oil pump? - Answer- Pick-up, pressurize, and strain oil How is an oil burner wired - Answer- Intermittent or interrupted How is an oil burner circuit wired? - Answer- Series When does an oil line have to be sleeved? - Answer- When it is buried or in contact with earth or cement What is the exception to overhead fireproofing? - Answer- Any AFUE (annualized fuel utilization efficiency) rated appliance What does "in-step" mean? - Answer- The primary control start circuit is closed What is the minimum size oil lines for residential burners - Answer- 3/8" OD, 3/8" IPS Is a permit required for the removal of an oil tank? - Answer- Yes Cross connections between two supply tanks shall not exceed ____________ gallons total. - Answer- 660 How is safety timing checked on a stack switch? - Answer- Remove the switch from its holder or disconnect terminal three, fire unit, and time its lockout. What is safety lockout timing firing under 3 GPHV ? - Answer- 15 seconds maximum. Is a combustion test required for tank replacement? - Answer- No Where should a thermal valve be installed on a supply line from the tank? - Answer- Connected at the bottom of the supply tank. What is a cadmium sulfide cell? - Answer- A resistor which changes its characteristics of conductivity in a direct proportion to the light striking it. What is the minimum size pipe that can be used for residential oil lines, and can right and left couplings be used? - Answer- 3/8" OD and 3/8" IPS minimum and right and left couplings are forbidden. What safety devices are found on a rotary burner? - Answer- A constant level valve and a solenoid valve. How is the oil flow regulated on a rotary burner? - Answer- The constant level valve When is a vent alarm used? - Answer- When gauge is not visible from fill When is a vent pipe required - Answer- All tanks that are larger than 10 gallons What must be done after an installation has been completed? - Answer- Submit a certificate of completion. When should your oil burner install certificate of completion be submitted? - Answer- Local fire department What is the time limit for submitting certificates of completion? - Answer- 72 hrs, excluding Saturday, Sunday, and all holidays. What is a confined space? - Answer- Less than 50 cu. ft. per 1,000 BTU's What is a gallon? - Answer- 231 cu. in. at a temp of 60 degrees Fahrenheit What are the element in air? - Answer- Nitrogen 80% or 79% Oxygen 20% or 21% How much air is required to burn a gallon of #2 fuel oil and why? - Answer- 1540 cu. ft.; This is the most amount of air needed to burn all the oil most efficiently. What kind of counts are used on oil tank installs? - Answer- Swing joints What are swing joints used on oil tanks? - Answer- To allow for movement or settlings without pipe or tank damage, and to enable piping to pitch back to tanks. What is the minimum distance that a burner must be from a tank? - Answer- 5' How many gallons of oil may be stored without a permit? - Answer- 10 gallons How much outside or replacement air is needed in a confined space - Answer- 140 sq." top and bottom per gallon per hour 1 sq." per 1000 BTU's How much outside or replacement air is needed in a boiler room of tight construction? - Answer- 28 sq." per gallon per hour 1 sq." per 5,000 BTU's What is a flame detector? - Answer- A device that sense flame thermally or visually What is a cad cell? - Answer- A visual flame sensor What is a purpose of a heat anticipator? - Answer- Prevents overheating Explain the differentials in a thermostat. - Answer- Mechanical - the operation of the helix; turns the appliance on and off Electrical - operation of the anticipator; prevents overheating What are the parts of an ignition assembly? - Answer- High voltage transformer, buss bars or high tension leads, insulators, and electrodes.