Red Seal Oil Heat System Technician key terms

The defined burner and appliance arrangement, including the required nozzle, pressure, geometry and operating conditions used to establish approved performance.

A pressure measurement relative to the stated atmospheric reference, which differs from a measurement referenced to a complete vacuum.

The fuel energy supplied per unit time on a stated basis, calculated from compatible flow and energy-per-volume information.

The useful energy output divided by the corresponding energy input under the stated test conditions and measurement basis.

The actual equipment state, load, location and reference under which a measurement is taken and must be interpreted.

The pressure contribution associated with the vertical position of liquid relative to a reference point in the connected system.

The vertical lifting requirement when a fuel unit draws oil from a lower source, considered together with friction and equipment limits.

Loss of the fuel-filled condition needed for the intended pump operation, potentially associated with air ingress, drain-back or supply faults.

The specified route carrying excess oil from a fuel unit back through the intended system in an arrangement designed to use it.

An internal fuel-unit configuration feature that must match the manufacturer’s specified supply and return arrangement for correct hydraulic operation.

The preparation of liquid fuel as a controlled spray of small droplets that supports evaporation, air mixing and the intended combustion process.

The distribution of fuel within a nozzle’s spray cone, distinct from its nominal flow and cone angle and important to burner matching.

The specified geometric spread of a nozzle spray under its stated conditions, selected to suit the burner and combustion chamber arrangement.

Oil emerging from the nozzle after intended fuel cutoff, which can involve hydraulic, trapped-air or thermal effects needing proper diagnosis.

The pressure condition measured at the specified combustion-area test point, which is not automatically identical to a breech draft reading.

A photoconductive flame detector whose resistance changes with the light it receives, used by a compatible oil primary control for flame supervision.

The control supervising the specified oil-burner sequence and responding to missing or inappropriate flame proof under its designed operating logic.

An ignition arrangement in which the ignition source stops after the specified establishment period rather than necessarily remaining energized through firing.

A designed airflow period following fuel cutoff, used by the particular appliance and control arrangement rather than assumed for every burner.

A protective control state restricting further burner operation until the specified response is completed, distinct from unrestricted permission to keep resetting.

The outlet temperature minus the inlet temperature for the stated heat-delivery path, interpreted together with input, flow and measurement conditions.

A heating arrangement that uses a circulating liquid to transfer heat between an appliance and the intended emitters or loads.

A component providing the designed accommodation for liquid volume change in a closed system, separate from normal demand and relief functions.

A contact associated with a zone device that provides the specified control signal when its required position or condition has been reached.

Taking equipment or a system section out of service using the required isolation, closure, identification and environmental handling process.