Viewing Basic Information; Setting The Operation Mode - Navien NPE Installation & Operation Manual

6.2.1 Using Commercial Mode
To use water above 140 °F (60 °C) (up to 182 °F (83 °C)), you can use
Commercial Mode.
To enter Commercial Mode: Press the Up [+] and Down [-]
buttons simultaneously for 10 seconds. "HIGH" appears on the
display.
To exit Commercial Mode: Press the Up [+] and Down [-] buttons
simultaneously for 10 seconds. "LoW" appears on the display.
To adjust the temperature, press the Up [+] button
Note
for 5 seconds to adjust in 10 °F (5 °C) increments.
Commercial Warranty applies when this mode is
used. Refer to the Warranty for more details.

6.3 Viewing Basic Information

To view information about the water heater, press the Information
button.
Press the Up [+] or Down [-] button to switch between the
information types.
Display
To exit information mode, press the Reset button.
64 Operating the Water Heater
Description
Flow rate in gallons per minute
(GPM).
Hot water outlet temperature (OUT).
Cold water inlet temperature (IN).

6.4 Setting the Operation Mode

1. Using the Front Panel, press and hold the Diagnostics button
for over 5 seconds until "1.TST" is displayed.
2. Press the Up [+] button once to change the display to "2.OPR".
3. Press the Information button once to access the Operation
Mode menu.
4. Press the Up [+] button once to set the water heater to operate
at 1-stage MIN ("MIN.1").
5. To set the water heater to operate at 2-stage MAX (1-stage
MAX for NPE-150S), press the Up [+] button 3 times or until
"MAX.2 (MAX.1 for NPE-150S)" is displayed.
6. To exit the Operation Mode and return the water heater to
normal operation, press the Reset button twice.
Diagnostics
Information
Reset