User Guide

21
1. High limit setpoint
The High Limit Setpoint is user adjustable by
turning the top knob labeled “BOILER TEMP”.
Adjustment range is 140°F to 220°F. During
normal operation the LED display will show boiler
temperature. When a change is made to the setpoint
knob the display will brighten and show the setpoint.
Factory programmed with High Limit Setpoint of
140°F.
2. Outdoor Reset Differential Setpoint (when outdoor
sensor installed)
The Outdoor Reset Differential Setpoint is user
adjustable by turning the bottom knob labeled
“OUTDOOR RESET DIFF”. Adjustment range is
0°F to 50°F. When no outdoor sensor is present, the
IBC uses the user setpoint as the operating setpoint.
When an outdoor temperature sensor is attached,
the IBC adjusts the Conditioned space demand
operating setpoint based on outdoor temperature.
See graph below.
130
140
150
160
170
180
190
-10 0 10 20 30 40 50 60 70 80
Boiler Operating Setpoint (°F)
Outdoor Temperature (°F)
Outdoor Reset
25°F (default)
0°F Diff. Setting