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National Radiator Company - Natural Gas Boiler

zeekthegeek
zeekthegeek Member Posts: 1
in Gas Heating

Hello -

We have a boiler and this was my grandmother's house before she passed and none of us know anything about boiler heating systems. She knew how to get it started and knew when something was not right.

The boiler is: National Radiator Company, we believe from 1958 or 1959. The house was built in 1959 and was installed then.

We have set the thermostat to 65 degrees and the boiler will not kick on, the pilot light is on.

IMG_1696.JPG

I believe this switch might be the issue but not sure.

IMG_1700.PNG

Pressure gauge in case that is needed:

IMG_1695.JPG

I have included a couple of pictures, I believe that this black plate, I want to call it a toggle switch might be the issue. I press that down and the boiler will kick on and if I release it the boiler will shut off - See video below:

https://youtube.com/shorts/8w5-sc0qNkM?feature=share

There is a red button which I believe to be a reset button. In the lighting instructions below, would I press the red button and that black toggle switch to get the boiler to stay lit as outlined in No 4?

I do not understand what Nos 5 & 6 mean.

IMG_1701.PNG

Thank you in advance for all of the help. 😁

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,990
    edited December 2024

    Sounds like the "Black Toggle" which is a relay is not working.

    Make sure the thermostat is turned up.

    At the top of the control are terminals T & T Find a scrap piece of wire and hold a jumper between T & T (if you feel comfortable doing that). T & T are just low voltage 24 volt so you will not get hurt but there is also 120 volt power in that relay box.

    Between terminals #1 &#2 there should be 120 volt power at all times.

    Terminals X & X probably start the burner they are just contacts the power comes from the boiler thermopile and is probably millivolts

    Terminal #3 should be live 120 volt which is powered from terminal #1 When the relay pulls in it powers terminal 4 internally from terminal 3. Terminal 4 I would guess powers the boiler circulator pump.

    If the relay pulls in when you jump T & T the problem is in the thermostat or thermostat wiring.

    zeekthegeek

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