Certified Employee Training Program: Placing Vapor Distribution Systems and Appliances into Operation

These flashcards cover key terminology and concepts related to placing vapor distribution systems and appliances into operation, as outlined in the training program.

Vapor Distribution System

A system that delivers propane vapor from containers to appliances for combustion.

Purging

The process of removing air or inert gases from a propane piping system before placing it in operation.

Lock-Up Test

A test to measure the pressure at which a regulator will shut off the flow of propane when there is no demand.

Flow Pressure

The pressure at which propane gas is delivered to appliances during operation.

NFPA 54

National Fuel Gas Code which provides guidelines for the installation and operation of gas appliances.

100% Safety Shutoff Valve

A device that automatically stops gas flow to the appliance’s combustion chamber when there is no ignition source.

Flame Rectification

A principle used in electronic ignition systems to ensure that the gas is only allowed to flow when a flame is detected.

Appliance Controls

Devices that manage gas flow, temperature, and ignition in gas appliances.

Natural Draft Venting

A venting system that relies on the natural rise of heated gases to expel combustion products outside.

Oxygen Depletion Sensor (ODS)

A safety device that detects low oxygen levels and shuts off gas supply to prevent dangerous conditions.

Flame Rollout

A hazardous condition where flames spill out of the combustion chamber due to insufficient combustion air.

Safety Devices

Components that protect against faults in gas appliances, such as high-limit switches and oxygen depletion sensors.

Combustion Air

Air needed for complete burning of fuel; must be supplied adequately to gas appliances to ensure proper operation.

Leak Check

A procedure to test for leaks in a gas system by applying pressure.

Specific Gravity

A measure of the density of a gas relative to air; propane vapor is heavier than air.

Appliance Categories

Classification of appliances based on use, such as dedicated, convertible, vented, and unvented.

Test-Block Gauge

A device used to measure the pressure in a gas system, typically used during leak checks.

Vent Connector

A pipe or duct that connects an appliance to the venting system.

Direct Venting

A venting method that uses air from outside for combustion and expels exhaust to the outside.