Glossary - Pentair Pool Products MiniMax NT Series Service Manual

Glossary

1. BURNER: A device for the final conveyance of gas,
or a mixture of gas and air, to the combustion zone.
2. BUTANE: A hydrocarbon fuel gas heavier than
methane and propane and a major constituent of
liquefied petroleum gases.
3. CIRCUIT BOARD: Interprets signals from
potentiometers and thermistor.
4. COMBUSTION: The rapid oxidation of fuel gases
accompanied by the production of heat or heat and
light.
5. COMBUSTION AIR: Air supplied in an appliance
specifically for the combustion of a fuel gas.
6. CUBIC FOOT OF GAS: (Standard Conditions).
The amount of gas which will occupy 1 cubic foot
when at a temperature of 60° F. and under a pressure
equivalent to that of 30 inches of mercury.
7. DRAFT HOOD: (Draft Diverter). A device built
into an appliance, or made part of a vent connector
from an appliance, which is designed to: (1) assure
the ready escape of the products of combustion in
the event of no draft, backdraft, or stoppage beyond
the draft hood; (2) prevent backdraft from entering
the appliance; and (3) neutralize the effect of stack
action of a chimney or gas vent upon the operation
of the appliance.
8. DOWNDRAFT: Excessive high air pressure
existing at the outlet of chimney or stack which
tends to make gases flow downward in the stack.
9. FLASHBACK: An undesirable flame characteristic
in which burner flames strike back into a burner to
burn there or to create a pop after the gas supply has
been turned off.
10. FLUE GASES, FLUE PRODUCTS: Products of
combustion and excess air in appliance flues or heat
exchangers before the draft hood.
11. GAS VALVE: A device that allows gas to flow
from the gas supply line into the pilot assembly and
into the main burners after receiving voltage from
the module.
12. HEAT EXCHANGER: Any device for transferring
heat from one fluid to another.
13. HIGH LIMITS: Devices installed into the outlet
side of the inlet/outlet header, designed to shut
heater off when water temperature reaches 150° F.
14. LIQUEFIED PETROLEUM GASES: The terms
"Liquefied Petroleum Gases" "LPG" and "LP Gas"
mean and include any fuel gas which is composed
Rev. B 2-11-04
predominantly of any of the following hydrocarbons,
or mixtures of them: propane, propylene, normal
butane or isobutane and butylenes.
15. MANIFOLD: The conduit of an appliance which
supplies gas to the individual burners.
16. MODULE: Device that sends signals to the pilot
ignitor and gas valve. The module starts the pilot
spark and main burner sequence.
17. NATURAL GAS: Any gas found in the earth, as
opposed to gases which are manufactured.
18. ORIFICE: An opening in an orifice cap (hood),
orifice spud or other device through which gas is
discharged, and whereby the flow of gas is limited
and/or controlled.
19. POTENTIOMETER: Registers desired
temperature setting on circuit board.
20. PRESSURE SWITCH: A normally open switch
that closes with adequate water pressure.
21. PRIMARY AIR: The combustion air introduced
into a burner which mixes with the gas before it
reaches the port. Usually expressed as a percentage
of air required for complete combustion of the gas.
22. PROPANE: A hydrocarbon gas heavier than
methane but lighter than butane. It is used as a fuel
gas alone, mixed with air or as a major constituent
of liquefied petroleum gases.
23. SOOT: A black substance, mostly consisting of
small particles of carbon, which can result from
incomplete combustion and appear as smoke.
24. TRANSFORMER: A coil device that changes high
voltage to low voltage.
25. THERM: A unit of heat energy equal to 100,000 Btu.
26. THERMAL CUT OFF: A one shot soldered pill
type fuse that melts and interrupts power to the
controls if the temperature becomes to high in the
gas valve area.
27. THERMISTOR: Installed in the inlet/outlet header,
senses water temperature and tells circuit board
when to shut heater off.
28. VENT: A device, such as a pipe, to transmit flue
products from an appliance to the outdoors. This
term also is used to designate a small hole or
opening for the escape of a fluid (such as in a gas
control).
29. WATER COLUMN: Abbreviated as W.C. A unit
used for expressing pressure.
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