flue fan control device???

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    • #278244
      MasterPlumbers
      Keymaster

      I have a gas water heater located in the garage mounted on a regulation stand. A flue fan is needed because the deck out back prevents the flue from going up the back wall of the house. The fan runs 24/7 and the thermocouple line is wired thru a temperature switch mounted on the flue hood.
      Problem: The fans burn out after a couple of years due to running 24/7.
      ??? Is there a “gas flow control device” that could detect an increase in gas flow and signal the fan to start? Also, why is it ok to cook 3 turkeys in your gas oven with no special vent but you need to have the water heater blowing all day?
      (before you say to hire a plumber, the gas company put the first install in, then Sears replaced the old one against code and the guy who came to add the table and flue fan smelled just a bit like Jack Daniels!!)
      I appreciate any info on this problem.

    • #298087
      bozo
      Participant

      All you need is a power vent installed to come on when the heater kicks on .Not a big dealI think what you are calling a flue fan is the same as a pwer vent ,it needs to be wired into the gas valve.Call an electrican.

    • #298088
      Selgas
      Participant

      The fan should not be running 24/7 as not only does it increase the usage of electrical power and cosequently increase your operating costs, it also draws a cold draught up through the water heater up along the flue and increases the cooling effect on the cylinder walls through the flue baffle area in the cylinder – which in turns causes the gas thermostat to react more often than would normally be required as it thinks the water neads heating.
      Have a sparkie wire up the flue fan to the switch on the flue terminal outlet vent – this will only allow the fan to operate when the main burner is on. Will also reduce your running costs both on gas and electricity. Hope this helps.



      Selgas Services Ltd
      Craftsman Gasfitters, Plumbers, Electrical Service Technicians

    • #298089
      prole111
      Participant

      There is a kit available that interlocks with a pressure switch to the main gas tube under control on water heater that will operate fan only when needed(when pressure is detected at main gas tube)

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