Navien NPE-180A Installation Manual page 43

5.1.1 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 acess the Operation
Mode menu.
4. Press the + (Up) button once to set the water heater to
opearate at 1-stage MIN ("MIN.1").
5. To set the water heater to operate at 2-stage MAX, press the +
(Up) button 3 times or until "MAX.2" is displayed.
6. To exit the Operation Mode and return the water heater to
normal operation, press the Reset button twice.
Diagnostics
Information
Reset
Appendixes 43