10) GLOSSARY
B-VENTED SYSTEM
A venting system using only approved double wall pipe and approved
CONTINUITY TEST
By using a multimeter set on OHMS, is determined if the circuit is complete, or continuous (no break in the circuit).
DIRECT VENT SYSTEM
A venting system sealed from the structure for both the exhaust gases and fresh air supply.
ELECTRODE (ignition)
Receives spark from the piezo ignitor to light the pilot.
IGNITOR (piezo)
A component used to create an electrical spark to the electrode to light the pilot.
IMPINGEMENT
When flame comes in contact with physical components. Impingement can cause incomplete combustion resulting in carbon monoxide production as well as soot.
MANOMETER
Instrument used to measure gas pressure.
MILLIVOLT
One
MULTIMETER
Instrument used to measure Volts. Amps, Ohms, (Volts DC, AC)
ORIFICE
A component that controls gas flow through the burners.
PILOT INJECTOR
A component that directs gas flow through the pilot assembly.
PRESSURE REGULATOR
A device used to maintain downstream gas pressure.
RATING PLATE
A plate in the appliance which shows all certifications and what type of fuel and what the appliance is rated for (example: BTU’s, gas type, serial#, etc.).
SOOTING
Carbon build up produced by incomplete combustion of the fuel being used.
SPILLAGE
When flue products do not properly exit the structure through the venting system.
SPILL SWITCH
A temperature sensitive switch designed to shut the appliance off in the case of improper venting action.
THERMOCOUPLE
A device used to generate power with heat from the pilot, up to 25mV DC.
THERMOPILE
A device used to generate power with heat from the pilot, up to 750mV DC.
VENTURI
Where gas and air are mixed before entering the burner tube.
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| Sherwood Industries Ltd. | ENVIRO | PAGE 23 |
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