Utica Boilers

I want access to my specification Utica boiler in my house I can not seem to find my model's manual filling and emptying 30,000 BTU gas furnace natural More then likely 15-20 years

contact the manufacturer.

http://www.uticaboilers.com/product_lite ...

This should put you there and if you can not find your specific model, then simply throw away a letter and request a manual - odds are they can help you.