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White Rogers 16E09-101 to the boiler TT wires

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JaymeHart
JaymeHart Member Posts: 60
in Strictly Steam

sorry to repost from my other thread.

How do I wire the White Rogers 16E09-101 to the boiler TT wires?

I have the previous old aquastat wired inline with the Boiler TT wires (managed by a Taco SR503-EXP-4 panel), so it only fires when the Taco is asking for heat AND the boiler temp is low. (If the boiler temp is OK, the Taco just runs the pump, no call for boiler fire).

Do I wire the boiler TT as the Load? And use a separate 24V transformer for power (or run additional wires from the boiler 24V transformer)?

1000010937.png

Comments

  • JaymeHart
    JaymeHart Member Posts: 60
    edited January 18

    Nevermind. Wired it up with a 24V transformer to TH and TR terminals.

    The Line and Load can then be used as dry contacts for the boiler trigger.

    Super easy.

    1000010941.jpg
  • 109A_5
    109A_5 Member Posts: 3,684
    edited January 19

    9.98 Ohms is not a reading I would expect from good contacts, ever. Less than an Ohm (Closed ) or infinite (Open). Seems there is a resistor in there for power stealing mode.

    image.png

    Maybe try the 24 VAC (Non Power Stealing) Non PS Mode switch setting.

    image.png

    I would try something like this.

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • JaymeHart
    JaymeHart Member Posts: 60

    Thats just my multimeter being flukey. pun intended. :)

    I have it set to non-Power stealing.

    with a 10W resistor in series.

    1000010942.jpg

    with just the 10W resistor

    1000010943.jpg
  • 109A_5
    109A_5 Member Posts: 3,684

    Is that 10W resistor also about 1.69 Ohms ? I did not see the resistor in the other picture. Assuming the contacts being less than an Ohm and the meter read 9.98 Ohms. WoW if my Fluke did that it would drive me nuts, I'd be finding out why. Bad test leads, maybe ?

    Anyway, as long as you are happy. . .

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • JaymeHart
    JaymeHart Member Posts: 60

    It is a 10R resistor. Measuring a bit high at 11.65R.

    I have had this experience before with this multimeter. It doesnt read short/closed as 0R, but gives me a varing resistance somewhere in 1R to 10R range.

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