Turning The Water Heater On Or Off; Adjusting The Water Temperature - Navien NPE-180A Service Manual

4.7.1 Turning the Water Heater On or Off

To turn the water heater on or off, press the Power button.
When the power is on, the temperature will appear on the front
panel display.

4.7.2 Adjusting the Water Temperature

WARNING
Before adjusting the water temperature, read "HOT WATER
TEMPERATURE SETTING" on page 40 carefully. Water
temperatures above 120°F can cause instant scalding, severe
burns, or death.
The water heater is set to 120°F (49°C) by default. To adjust the
water temperature:
1. Make sure that all hot water faucets are closed, and ensure that
the internal circulator and any external circulating pumps are
off.
NOTE
If a hot water faucet is open, you can adjust the temperature
only from 98-110°F (37-43°C).
2. Press the + (Up) or – (Down) buttons until the desired
temperature appears on the display. You can adjust the
temperature while the display is flashing. Once the display
stops flashing, the temperature setting is stored.
NOTE
The water heater will retain your settings during a power
outage.
System Details 35