ECR 075 97gb Installation, Operation And Maintanance Manual - page 58
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16 - 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. over-
sees creation and maintenance of voluntary consen-
sus 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 devel-
opment organizations in world trusted source for technical
standards for materials, products, systems, and services.
Known for their high technical quality and market relevan-
cy, ASTM International standards have important role in
information infrastructure that guides design, manufactur-
ing and trade in the global economy.
AUTHORITY HAVING JURISDICTION -
•
Individual or orga-
nization 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 ma-
terial shall be considered combustible even though fl ame-
proofed, fi re-retardant treated, or plastered.
CONDENSATE
•
- Liquid separated from fl ue gas due to re-
duction 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.
FLUE GASES
•
- Products of combustion plus excess air in
appliance fl ues or heat exchanger.
GAS PIPE SIZES
•
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 automati-
cally 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 dis-
sipation of any unburned gas or residual products of
combustion.
QUALIFIED AGENCY
•
- Any individual, fi rm, corporation, or
company engaged in and responsible for:
Installation, testing, or replacement of gas piping,
•
or connection, installation, testing, repair or
servicing of appliances and equipment.
Experienced in such work.
•
Familiar with all precautions required.
•
Complies with all requirement of authority having
•
jurisdictions.
SAFETY RELIEF VALVE
•
- Valve designed to relieve
pressure, in hot water supply system, when pressure
exceeds pressure capability of equipment.
SAFETY SHUTOFF DEVICE
•
- Device that will shut off gas
supply to controlled burner in event source of ignition
fails.
SEDIMENT TRAP
•
- Gas piping arrangement designed to
collect any liquid or solid contaminant before reaching
gas valve.
VENT
•
- Passageway used to convey fl ue gases from
appliance vent connector to outdoors.
VENTING SYSTEM
•
- Continuous open passageway from
of appliance vent connector to outdoors for purpose of
removing fl ue or vent gases.