Glossary - Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual

• ANSI - American National Standards Institute,
Inc. oversees creation and maintenance of voluntary
consensus standards, including ANSI Z21.13/CSA 4.9: Gas-
Fired Low Pressure Steam and Hot Water Boilers.
• 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
services. Known for their high technical quality and market
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
referred to as "final authority" for any matters relating
to LIFE SAFETY and BUILDING CONSTRUCTION within a
community.
• Btu - Abbreviation for British Thermal Unit. Quantity of heat
required to raise temperature of 1 pound of water 1°F.
• BURNER - Device for final conveyance of gas or mixture of
gas and air, to combustion zone.
• COMBUSTION - Rapid oxidation of fuel gases accompanied
by production of heat or heat and light. Complete combustion
of fuel is possible only in presence of adequate supply of
Oxygen.
• COMBUSTIBLE MATERIAL - Materials made of or surfaced
with wood, compressed paper, plant fibers, or other
materials capable of being ignited and burned. Such
material shall be considered combustible even though flame-
proofed, fire-retardant treated, or plastered.
• CONDENSATE - Liquid separated from flue gas due to
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.
• DRAFT - Pressure difference causes gases or air to flow
through a chimney, vent, flue or appliance.
• FLA - Full load amps.
• FLUE GASES - Products of combustion plus excess air in
appliance flues or heat exchanger.

15 - GLOSSARY

• HIGH-VOLTAGE - Circuit involving potential of not more
than 600 volts and having circuit characteristics in excess of
those of low-voltage circuit.
• 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.
• LOW WATER CUTOFF - Device constructed to automatically
cut off fuel supply when surface of water in boiler falls to
lowest safe water level.
• LOW-VOLTAGE - Circuit involving potential of not more
than 30 volts.
• METRIC GAS METERS
Natural Gas
MBH
For example: Gas Meter measures 0.1 cubic Meters in 100
MBH
Propane Gas (LP)
MBH =
• PRESSURE TEST - Operation performed to verify gas
tight integrity of gas piping following its installation or
modification.
71
127,116 x cu meters
=
Seconds
seconds
127,116 x 0.1
= = 127 MBH
100
383,482 x cu meters
Seconds
P/N 240011326, Rev. B [04/15/2016]