Navien NFC-175 Installation & Operation Manual page 100

11.4.7 Setting the Special Operation Modes
To operate the boiler in special operation modes, press the Back
button ( ) and the Menu button (
3 seconds, and then select "7. Special Operations".
Rotate the Command dial (
modes. Press the Command dial (
The boiler resumes operation in normal operation mode if no input
is detected for 3 hours.
Press the Back button (
menu.
Item
1. Normal
2. 1st MIN
3. DHW 1st MAX
4. 2nd MIN
5. DHW 2nd MAX
6. SH 1st MAX
7. SH 2nd MAX
100 Operating the Boiler
) simultaneously for
) to switch between the operation
) to select an operation mode.
) to return to the previous screen or
Description
Set the boiler to run in Normal
operation mode.
Set the boiler to run in 1st stage
minimum operation mode.
Set the boiler to run in DHW 1st
maximum operation mode.
Set the boiler to run in 2nd stage
minimum operation mode.
Set the boiler to run in DHW 2nd
maximum operation mode.
Set the boiler to run in SH 1st maximum
operation mode.
Set the boiler to run in SH 2nd
maximum operation mode.
11.4.8 Operating in Air Purge Mode
To operate the boiler in air purge mode, press the Back button
( ) and the Menu button (
then select "8. Air Purge Mode".
Rotate the Command dial (
Press the Command dial ( ) to run an air purge.
The boiler resumes operation in normal operation mode if no input
is detected for 15 minutes.
Press the Back button ( ) to return to the previous screen or
menu.
Item
Run an air purge on the space heating
1. SH pipe air purge
pipe.
) simultaneously for 3 seconds, and
) to switch between the parameters.
Description