Dunkirk Helix VX Vertical Laser Tube Wall Hung Stainless Steel Modulating Condensing Boiler - Manual (Page 68)

68
NATURAL GAS
Length of Pipe
- Ft.
Pipe Capacity - BTU Per Hour Input Includes Fittings
1/2” 3/4” 1” 1 1/4”
20 92,000 190,000 350,000 625,000
40 63,000 130,000 245,000 445,000
60 50,000 105,000 195,000 365,000
PROPANE GAS
Length of Pipe
- Ft.
Pipe Capacity - BTU Per Hour Input Includes Fittings
Copper Tubing
(Outside Diameter)
Iron Pipe
5/8” 3/4” 1/2” 3/4”
20 131,000 216,000 189,000 393,000
40 90,000 145,000 129,000 267,000
60 72,000 121,000 103,000 217,000
• 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.
• 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
MBH =
127,116 x cu meters
Seconds
For example: Gas Meter measures 0.1 cubic Meters in 100
seconds
MBH =
127,116 x 0.1
= 127 MBH
100
• PRESSURE TEST - Operation performed to verify gas
tight integrity of gas piping following its installation or
modification.
• PURGE - To free gas conduit of air or gas, or mixture of
gas and air.
• PURGE TIME - Period of time intended to allow for
dissipation of any unburned gas or residual products of
combustion.
• GAS PIPE SIZES - Table 14
15 - GLOSSARY