HVAC Excellence Oil Heat Certification study plan

Map the full oil heat system from tank to chimney: identify fill and vent, tank, oil filter, primary safety control, burner, combustion chamber, heat exchanger, and flue path on a blank diagram you draw yourself.

Explain in writing why oil must be atomized and vaporized before ignition, and describe what happens to combustion efficiency when atomization is poor.

Define and correctly use the terms ignition transformer, electrode gap, nozzle, retention head, blower wheel, cad cell, and stack relay in your own notes.

List the three legs of the combustion triangle and state how excess air, draft, and turbulence each affect flame quality.

Describe the oil burner sequence of operations step by step, from thermostat call through prepurge, ignition, oil valve opening, flame proving, and run.

Explain the safety role of the primary control and the cad cell, including what happens on flame failure and why lockout timing matters.

Identify the components inside a typical retention-head burner and state the function of each.

Trace the fuel path and the air path separately and note where each can be restricted.

Classify oil nozzles by pattern, spray angle, and flow rate, and match a nozzle choice to a combustion chamber shape and firing rate.

Explain how pump pressure changes nozzle flow rate and calculate flow at a pressure other than the rated 100 psi using the square-root rule.

Describe the function of the oil pump, its cutoff, and the symptoms of a failing pump or a leaking pump seal.

Explain electrode adjustment: gap, spacing from the nozzle, and how misalignment causes delayed ignition or nuisance lockout.

Perform and interpret combustion analysis: measure smoke, CO2 or O2, stack temperature, and draft, then compute steady-state efficiency.

Explain why smoke and efficiency trade off, and state a defensible target for smoke number and excess air on a residential oil appliance.

Diagnose common combustion faults from readings alone: too much draft, too little draft, overfiring, underfiring, and a fouled heat exchanger.

Describe the correct order of burner adjustments and why each adjustment invalidates the previous readings.

Describe the fuel oil supply systems you may encounter: single-pipe gravity, two-pipe, and lift or vacuum arrangements, and state when each is required.

Explain tank installation and safety requirements in concept: fill and vent sizing, tank support, clearance from ignition sources, and protection against corrosion.

Identify the causes and fixes for the common fuel-side failures: air lock, clogged filter, gelled or cold oil, plugged vent, and a leaking suction line.

Explain oil filter selection and placement and the difference between a pump strainer and an inline filter.

Explain the electrical control circuit around a typical oil burner: thermostat, limit, primary control, transformer, cad cell, and oil valve.

Read a schematic and describe what a jumper or open safety would do to the sequence, without relying on the physical layout of the panel.

Describe safe electrical test procedure with a multimeter for the transformer, cad cell resistance, and the primary control.

Explain why a jumped or bypassed safety control is a serious hazard and how you would document it.

Build a complete annual service routine for an oil-fired appliance, from isolation and inspection through cleaning, adjustment, and final combustion test.

Describe heat exchanger cleaning, chamber inspection, flue and barometric damper checks, and what condition each inspection is looking for.

Explain preventive maintenance items the homeowner controls: filter changes, tank water removal, and watching for leaks or soot.

State the safety checks required before leaving a job, including draft verification, CO testing, and confirming the primary control will lock out.

Diagnose a full set of integrated fault scenarios that combine combustion, fuel delivery, and electrical symptoms.

Explain the interaction between draft, chamber condition, and flame shape, and how a single fault can present as two different symptoms.

Review every weak area from your earlier deliverables and rewrite the notes you got wrong.

Practice explaining a repair recommendation to a customer in plain language, including why the safety control must not be bypassed.