Flammable Vapour Sensor Resistance

Checking a vapor sensor on ao smith water heaters.

Flammable vapour sensor resistance.

The proprietary conductive polymer sensing film expands in the presence of flammable vapors significantly changing sensor resistance. A higher sensor resistance and vice versa. Rheem ap13447 3 water heater oem replacement flammable vapor sensor 4 5 out of 5 stars 62. The 25vs chemi resistive flammable vapor sensor is an integral part of the flammable vapor ignition resistance fvir systems offered by the north american water heater manufactures on residential power vent and high efficiency atmospheric models.

Most people don t have a 30 kohm resistor at home to use as a temporary fix. Elegoo 17 values 1 resistor kit assortment 0 ohm 1m ohm pack of 525 rohs compliant for electronic projects 4 7 out of 5 stars 660. I was able to test the resistance of my fvs using a multimeter and mine was somewhere around 196 000 kilo ohms. Mega amounts of resistance indicates a bad vapor sensor.

Flammable vapor sensor chemi resistive fl ammable vapor sensor therm o disc s 25vs chemi resistive fl ammable vapor sensor was custom designed for the water heater industry joint research and development consortium to meet flammable vapor ignition resistance fvir requirements of ansi z21 94 csa 6 31 standard. Certain rheem water gas water heater models feature electronic controls with a flammable vapor sensor installed on the bottom portion of the water heater unit. Unlike active sensors that typically utilize metal oxide or infrared technologies the 25vs does not require an external power source to detect flammable. The sensor has a resistance of about 10 50 kohms when it has not been exposed to natural gas or splashed with water during cleaning.

This sensor is designed to shut off your water heater system to prevent fires in case flammable vapors are present within the area. I describe how i permanently fixed a faulty flammable vapor sensor on a water heater. Unique benefits the therm o disc 25vs flammable vapor sensor yields several unique benefits when compared with other vapor sensing technologies. Hot water tank flammable vapor sensor lockout a o.

Only 7 left in stock order soon. Clearly the fvs had simply gone bad.