Installation / Operation Instruction Manual

02/04/2021 11 BI810
Hardware Setup
The boiler includes an outdoor sensor which is disconnected from the factory.
Based on the condition of this outdoor sensor upon boiler power-up (connected or disconnected), the
boiler will work to formulate its desired set point output temperature upon system thermostat demand in
one of two ways:
Connected:
If the outdoor sensor is connected upon system power-up, the boiler will enable its outdoor reset function.
This function allows the boiler to adjust its set point output water temperature based on the outdoor
temperature. This function can be further adjusted by using the display to adjust a software variable
known as “OT @ 0°F SP” (outdoor temperature at 0°F set point). This allows you to adjust the outdoor
reset curve to better meet you application.
NOTE: If sensor is connected upon system power-up, it must be located outside.
Disconnected:
If the outdoor sensor is not connected, the boiler will disable its outdoor reset function and operate based
on a fixed set point value. This fixed set point can be adjusted to better meet the application by using the
display and adjust a software variable known as “SET POINT”. This is the fixed output water
temperature the boiler will target when there is a heat demand from the system thermostat.