Dunkirk DCBF-125 - 14 Glossary

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• APPLIANCE - Device to convert gas into energy; term
includes any component, control, wiring, piping or tubing

• ANSI - American National Standards Institute, Inc. over
see's creation and maintenance of voluntary consensus
standards, including ANSI Z21.13/CSA 4.9: Gas-Fired Low
Pressure Steam and Hot Water Boilers.
• ASME - Association of Mechanical Engineers
Establishes rules of safety governing the design, fabrication,
and inspection of boilers and pressure vessels, determining
the MAWP of such vessels.
• ASTM - American Society for Testing and Materials.
ASTM International is one of largest voluntary standards
development organizations in world trusted source for
technical standards for materials, products, systems, and

relevancy, ASTM International standards have important
role in information infrastructure that guides design,
manufacturing and trade in the global economy.
• AUTHORITY HAVING JURISDICTION - Individual or
organization adopting and enforcing codes, rules, and by-
laws governing various concerns of community. Commonly

to LIFE SAFETY and BUILDING CONSTRUCTION within a
community.
• BOILER
heating, processing or power purposes.
• BTU - Abbreviation for British Thermal Unit. Quantity of heat

• BURNER 
gas and air, to combustion zone.
• CALIBRATE 
intervals for optimal measuring.
• COAXIAL VENTING Sharing the same center.
• COMBUSTION - Rapid oxidation of fuel gases accompanied
by production of heat or heat and light. Complete combustion

Oxygen.
• COMBUSTIBLE MATERIAL - Materials made of or surfaced

materials capable of being ignited and burned. Such


• COMBUSTION AIR - Air that is drawn into an appliance to
mix with fuel and support combustion.
• CONDENSATE 
reduction in temperature.
• DIRECT VENT BOILER - Boiler constructed and installed so
all combustion air is derived directly from outdoors and all
vent gases are discharged to outdoors.
• DOMESTIC - Relating to household usage as opposed to
commercial usage.
• DOMESTIC WATER - Potable drinking water - tap water.
• DRAFT 

• FLA - Full load amps.
• FLUE - Enclosed passageway for conveying combustion
gases.
• FLUE GASES - Products of combustion plus excess air in

• GAS SUPPLIER - Party that sells commodity of Natural Gas
(Gas A) or LPG (Gas E).
• HIGH-VOLTAGE - Circuit involving potential of not more
than 600 volts and having circuit characteristics in excess of
those of low-voltage circuit.
• HYSTERESIS (DIFFERENTIAL) -

temperature at which it switches on again.
• IGNITER - Device utilizing electrical energy to ignite gas at
main burner.
• LEAK CHECK - Operation performed on gas piping system
to verify system does not leak.
• LICENSED QUALIFIED INSTALLER / SERVICE
TECHNICIAN -
company that either directly or through a representative is
engaged in the installation, replacement, repair or servicing
of gas piping, venting systems, appliances, components,

experienced and trained, in such work and has complied

• LOW WATER CUTOFF - Device constructed to automatically

lowest safe water level.
• LOW-VOLTAGE - Circuit involving potential of not more
than 30 volts.
14 - GLOSSARY
240012564 REV A, [05/15/2019]