IBC SL Series Installation & Operating Manual page 120

The following message is relevant to users in the USA:
Important
This Boiler is equipped with a feature that saves energy by reducing the boiler water
temperature as the heating load decreases. This feature is equipped with an override
which is provided primarily to permit the use of an external energy management system
that serves the same function. THIS OVERRIDE MUST NOT BE USED UNLESS AT
LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE: An external energy
management system is installed that reduces the boiler water temperature as the heating
load decreases. This boiler is not used for any space heating. This boiler is part of a
modular or multiple boiler system having a total input of 300,000 BTU/hr or greater. This
boiler is equipped with a tankless coil (not applicable to these boilers). US installers
should contact IBC for any further information required.