77 Ill. Adm. Code 205.1530
Steam and Hot Water Systems
Section 205
Section 205.1530Â Steam and
Hot Water Systems
a)Â Â Â Â Â Â Â Â Boilers and/or hot water heaters shall have the capacity,
based upon the net ratings published by the Hydronics Institute, to supply the
normal requirements of all the systems and equipment.
b)Â Â Â Â Â Â Â Â Supply and return mains and risers of space heating and process
steam systems shall be valved to isolate the various sections of each system.
Each piece of equipment shall be valved at the supply and return ends.