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Will an old Intelledyne HW+ work well with a new Burnham ESC

04090 Member Posts: 142
We're converting from oil to gas, and the old boiler has a well functioning Intelledyne HW+,

Willl this work successfully with a new model Burnham ESC, or will it conflict with the electronics?. 

If it will work, should it be installed in place of or in conjunction with the outdoor reset?


  • Tim McElwain
    Tim McElwain Member Posts: 4,506
    Answer from Burnham Rep

    Our stand on this is a definite NO. They would have to cut into the wiring harness to the gas valve and that is a no-no by code in case of a mis-wiring concern. They could accidentally send 24v to the gas valve and cause the boiler to run away. I would suggest an ODR card.

    Ron Beck

    Manager of Training

    Phone 717-545-4067

    Fax 610-340-2354
  • 04090
    04090 Member Posts: 142
    edited November 2011

    That's perhaps the most definative "no" I've seen on this site.  Thanks for the warning. 

    The device has greatly reduced the operating expense of the old boiler.  As I understand it, the ODR monitors only the outside temperature and regulates the temperature of the circulating water.  The Intellecon monitored the return temperature of the circulating water, and held the burner back from starting until the water temeprature had significantly dropped.  Both are out to save fuel by different means.

    Is there something similar to the Intellecon that will work in conjuction with the ODR?

    (I haven't studied the schematic for the ESC, but envisioned the Intellecon cutting power to the boiler, not the valve.  Would also like to know how the circulator control can be bypassed to allow the circulators to always run - something we've done to prevent lines from freezing when it goes below 0F.)
  • Steamhead
    Steamhead Member Posts: 15,330
    edited November 2011
    Take Ron's advice

    and get the outdoor-reset (ODR) card that plugs into the boiler. It comes with the outdoor sensor which is installed on the north side of the building, above the maximum snow line. These work quite well- here's one where we installed it on an ES-2:

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • Mike Kusiak_2
    Mike Kusiak_2 Member Posts: 604
    Post purge setting

    The ESC also has a post purge feature, which allows you to remove residual heat from the boiler after the call for heat ends. Although not quite the same as what the Intellidyne does, it will however reclaim some of the heat left in the boiler after the burner shuts down, pumping it into the priority zone. Together with the outdoor reset card, the combination can result in significant energy savings.

    The setting is called "pump overrun time" in the IQ control menu, and can be programmed from zero to 10 minutes after the call for heat ends.
  • 04090
    04090 Member Posts: 142
    edited November 2011

    Have been told the post purge feature is not compatible with the Taco 504-EXP board by the installer.

    The ODR sounds like a great feature for a place that's typically occupied.  This new heating system is in a part of the house which is only occupied for an hour in the morning and an hour in the evening, at which times the thermostat is set to 70.  For the other 22 hours of the day, it's set to 52, so the Intelledyne seems a good device to have.  This wonderful old house was miserably transformed to a multi-family years ago, we're using it as originally built as a single family, and multiple heating systems remain.

    Never envisioned cutting into the wires within the boiler.  The 504-EXP has a terminal labeled XX which leads to TT on boiler, and it powers the circulators independently (or so it seems) making the Intelledyne seem easy to hook up between XX and TT.  I don't know the schematics of the device, if a relay would be required or how to connect it, or even if it's compatible.  Guidance appreciated.

    504-EXP:  http://www.taco-hvac.com/uploads/FileLibrary/SR504-EXP%28102-087%29.pdf
  • Tim McElwain
    Tim McElwain Member Posts: 4,506
    edited November 2011
    You seem to have it all

    figured out so you are on your own. I would however strongly suggest you get in touch with Burnham before you do anything to change the configuration.

    The info I gave you came from one of the top trainers on these systems in the country who works directly for Burnham. If any one knows what can and can't be done he does.

    Why not call Ron Beck and talk to him direct.
  • CMadatMe
    CMadatMe Member Posts: 3,086
    edited November 2011

    Taco makes a very inexpensive post purge card that plugs into the power port of the zone control. Use it all the time.


    Your better off using the ODR card then you are using this. I think you should also takes Tims advice.
    "The bitter taste of a poor installation remains much longer than the sweet taste of the lowest price."
  • 04090
    04090 Member Posts: 142

    Went with just the ODR afterall.  Cutting into the boiler's circuitry just didn't sound like a good thing to do, although combining the devices still sounds good  in theory.

    Thanks for steering me in the right direction.
This discussion has been closed.