How do you reset the FVS on a AO Smith water heater?

1. Manual reset is accomplished by first, turning off power to the water heater for 10. seconds.
2. Restore the power to the water heater.
3. Within 10 seconds of restoring power, press the two temperature adjust buttons.

What causes vapor sensor lockout?

What is a Flammable Vapor (FV) Sensor? FV Sensors are safety devices on select models of water heaters, which cause a soft lockout (a.k.a. the unit shuts down) when flammable vapors are detected near the unit, to prevent the possibility of their ignition.

What is lockout on water heater?

When the unit goes into a “System Lock Out” there could be one of several faults: Gas supply is off of too low to operate. The Hot surface ignitor is not positioned correctly. Low voltage supply to the water heater. The voltage supply has reverse polarity.

Is the fvir water heater required to be elevated?

This makes elevation of the water heater unnecessary, and the code exempts FVIR water heaters from being elevated like the one on the plywood platform in the photo at the top of this page. The code states that “elevation of the ignition source is not required for appliances that are listed as flammable-vapor-ignition-resistant.

When do water heaters need to be raised off the floor?

It is not necessary for electric water heaters or gas water heaters manufactured after mid-2003. The code states that “appliances having an ignition source shall be elevated not less than 18 inches (457 mm) above the floor in garages,” and the purpose of this stipulation is fire safety.

Where is the FV sensor on my hot water tank?

Please ensure your basement/mechanical room is well ventilated during this process. Use at own risk. -Locate the FV sensor at the bottom of the tank located inside grey plastic clip box. -Turn power off to hot water tank.

What kind of flooring does a hydronic heating system use?

The sub-floor and tubing is covered by concrete, gypcrete, or dry-tamped mortar, providing a solid seal. These materials hold heat, allowing it to radiate evenly whether the system is running or not. In most cases, the floor is finished using ceramic floor tiles, as these also hold heat well.