The Front Panel - Navien NFB-175H User's Information Manual

2.3 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.
2.3.1 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
g
i
k
Outdoor reset
Displayed when the Outdoor
Reset feature is enabled.
System check or error
Displayed when an error is
detected or a system check is
needed due to service alarm
overtime.
Cascade/Main mode
Flashes when configuring a
cascade system. Turns on solid
if the boiler is set as the Main
unit in a cascade system.
AHU connection
Displayed when the AHU
connection settings are
enabled. If there is a problem
or a connection is being
made, this icon will blink.
DHW demand
Indicates that DHW
demand is present.
System pressure
Displays the internal water
pressure of the boiler
system.
Space heating
temperature
Displays the set and
current space heating
temperature.
c
b
a
l
k
j
Combustion
b
Displayed when the burner is
combusting.
Anti-freeze
Displayed when the boiler
is operating in anti-freeze
d mode.
Auto air purge
Displayed when an auto air
purge is being performed.
DHW priority
f
Displayed when the DHW
Priority feature is enabled.
DHW temperature
h
Displays the set and current
DHW temperature.
Outdoor temperature
j
Displays the outdoor
temperature.
Space heating demand
Indicates the space heating
l
demands from thermostats
1, 2, and 3.
d
e
f
g
h
i
About the Boiler 7