Operating The Boiler; Using The Front Panel - Navien NCB300-28K Installation & Operation Manual

10. Operating the Boiler

10.1 Using the Front Panel

The front panel allows you to adjust the temperature and view the operating status or error codes. Remove the protective sheet from the
front panel before using it.
10.1.1 Icons and Digital Display
The icons and digital display on the front panel provide important
information required for the boiler's operation. Refer to the following
table for detailed information.
a
c
e
48 Operating the Boiler
Outdoor temperature
compensation (OTC)
Displayed when the outdoor
temperature compensation (OTC) is
enabled.
System fault
Displayed when a system fault is
detected.
DHW demand
Indicates that DHW demand is
present.
c
b
a
Combustion
b
Displayed when the burner is
combusting.
DHW preheat
d
Displayed when the DHW preheat
feature is enabled.
Central heating demand
f
Indicates the central heating demand
is present.
d
e
f
g