Navien NFC-250/175H Installation Manual page 116

When Installing the Cascade System
When using the recirculation feature in the cascade
system, you can choose commands in the menu
to preheat according to the set DHW temperature.
(Refer to "8.2 Cascade System - Recirculation System
Application Example" for details on installing.)
For water heater(s) that are connected to
Note
the recirculation line, each unit must be
set to the proper recirculation mode.
Item
Set to repeat DHW Recirculation
1. Always On
(default).
The user can choose commands
for DHW Recirculation on a weekly
basis.
1. 1 Day: Schedule a command
for the week.
2. Weekly*
2. 3 Day: Schedule commands
for Weekdays, Saturdays, and
Sundays.
3. 7 Day: Schedule commands for
each day of the week.
* To choose this option you must set up the Time setting in
the Configuration menu.
116 Operating the Boiler
Description
Set the Weekly Schedule
When setting up the Weekly option, select 'Weekly, '
and select between 1 Day, 3 Day, and 7 Day to go to
the Schedule menu.
Working
Rotate the Command dial (
scheduled time. You can choose the time in 30
minutes intervals. To finalize the weekly schedule
settings, press and hold the Command dial (
more than 2 seconds.
11.5.4 Viewing Error History
To view the error history, press the Menu button
( ), and then select "4. Error History".
A list of 10 recent errors are displayed on the screen,
with the most recent error displayed at the top of
the list.
Not working
) to choose the
) for