Red Seal Oil Heat System Technician flashcards
Red Seal Oil Heat System Technician · Build recall with a focused review session.
25 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Firing specification
- The defined burner and appliance arrangement, including the required nozzle, pressure, geometry and operating conditions used to establish approved performance.
- Gauge pressure
- A pressure measurement relative to the stated atmospheric reference, which differs from a measurement referenced to a complete vacuum.
- Input rate
- The fuel energy supplied per unit time on a stated basis, calculated from compatible flow and energy-per-volume information.
- Useful efficiency
- The useful energy output divided by the corresponding energy input under the stated test conditions and measurement basis.
- Test condition
- The actual equipment state, load, location and reference under which a measurement is taken and must be interpreted.
- Static head
- The pressure contribution associated with the vertical position of liquid relative to a reference point in the connected system.
- Suction lift
- The vertical lifting requirement when a fuel unit draws oil from a lower source, considered together with friction and equipment limits.
- Loss of prime
- Loss of the fuel-filled condition needed for the intended pump operation, potentially associated with air ingress, drain-back or supply faults.
- Return line
- The specified route carrying excess oil from a fuel unit back through the intended system in an arrangement designed to use it.
- Bypass provision
- An internal fuel-unit configuration feature that must match the manufacturer’s specified supply and return arrangement for correct hydraulic operation.
- Atomization
- The preparation of liquid fuel as a controlled spray of small droplets that supports evaporation, air mixing and the intended combustion process.
- Spray pattern
- The distribution of fuel within a nozzle’s spray cone, distinct from its nominal flow and cone angle and important to burner matching.
- Spray angle
- The specified geometric spread of a nozzle spray under its stated conditions, selected to suit the burner and combustion chamber arrangement.
- Nozzle afterdrip
- Oil emerging from the nozzle after intended fuel cutoff, which can involve hydraulic, trapped-air or thermal effects needing proper diagnosis.
- Overfire draft
- The pressure condition measured at the specified combustion-area test point, which is not automatically identical to a breech draft reading.
- Cad cell
- A photoconductive flame detector whose resistance changes with the light it receives, used by a compatible oil primary control for flame supervision.
- Primary safety control
- The control supervising the specified oil-burner sequence and responding to missing or inappropriate flame proof under its designed operating logic.
- Interrupted ignition
- An ignition arrangement in which the ignition source stops after the specified establishment period rather than necessarily remaining energized through firing.
- Post-purge
- A designed airflow period following fuel cutoff, used by the particular appliance and control arrangement rather than assumed for every burner.
- Lockout
- A protective control state restricting further burner operation until the specified response is completed, distinct from unrestricted permission to keep resetting.
- Temperature rise
- The outlet temperature minus the inlet temperature for the stated heat-delivery path, interpreted together with input, flow and measurement conditions.
- Hydronic distribution
- A heating arrangement that uses a circulating liquid to transfer heat between an appliance and the intended emitters or loads.
- Expansion vessel
- A component providing the designed accommodation for liquid volume change in a closed system, separate from normal demand and relief functions.
- Zone end switch
- A contact associated with a zone device that provides the specified control signal when its required position or condition has been reached.
- Decommissioning
- Taking equipment or a system section out of service using the required isolation, closure, identification and environmental handling process.