The control board was called ICECON, and from what little I recall the software was of the same name, but it came on an unmarked CD. You have to contact ICE for it. These low temp rise units were Canadian made vs. the U.S. made high temp. rise units.
Issues were the temperature sensor location, the set points which are factory set on the board according to the model, the Johnson modulating gas valve, and the feedback signal to the board on the combustion fan. Don't know if the low rise units are listed as condensing, but as far as I am concerned, they're real close to it. Can't explain the two condensate drains they have any other way. The U.S. high rise version does not have them.