ECR International 075 97gb, Installation, Operation & Maintenance Manual

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15 - GLOSSARY
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 "fi nal 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
water1°F.
BURNER • - Device for fi nal 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 fi bers, or other
materials capable of being ignited and burned. Such
material shall be considered combustible even though
fl ame-proofed, fi re-retardant treated, or plastered.
CONDENSATE • - Liquid separated from fl ue 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 fl ow
through a chimney, vent , fl ue or appliance.
FLA • - Full load amps.
FLUE GASES • - Products of combustion plus excess air in
appliance fl ues 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
modifi cation.
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 •