Guardian PowerVent Training Manual SVC900; Rev 1
Page 7
Thermal Release Device – (TRD) Mechanism that detects and trips in the presence of high heat
inside the combustion chamber. This higher than normal heat could mean a flammable vapor
incident or the creation of carbon monoxide.
Temperature and Pressure Relief Valve – Safety device that vents extreme pressure and
exceedingly hot water outside the tank to prevent tank rupture and explosion. Commonly called
the T&P valve, it is designed to operate at approximately 150 PSI or 210
0
F.
Vacuum Switch – Safety device that will allow power to the gas control module. Senses the
presence of vacuum from the blower motor to verify proper venting before it opens the gas
valve.
Figure 1 – Components of
Guardian PowerVent
Burner Assembly
Propane Natural
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