We recently moved into our new house and have a Navien NPE tankless water heater. This is our first experience with a tankless system - so far very happy with it. The factory default setting for the temperature is 120 degrees. By the time the water gets to the various faucets in the house, the water temp is more like 115 - 117 degrees. I don't want to waste energy or money (we use propane so more expensive than natural gas) but the water temp just feels a bit chilly to me. I am trying to resist bumping it up to 125 degrees (it only changes in 5 degree increments).
What do you have your tankless water heater set to?
3.1 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.
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Operating the Water Heater
3.2 Adjusting the Water Temperature
WARNING
Before adjusting the water temperature, read "To prevent
burns:" on page 4 carefully. Water 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.
If a hot water faucet is open, you can adjust the
Note
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.
The water heater will retain your settings during
Note
a power outage.
You can adjust the temperature by the below 10-degree
increments, depending on the temperature range:
Temperature range
98°F-120°F (Fahrenheit mode)
36°C-50°C (Celsius mode)
120°F-140°F (Fahrenheit mode)
50°C-60°C (Celsius mode)
The water heater will not provide hot water instantly at the hot
water faucet unless a recirculation line has been installed from the
furthest fixture back to the water heater. For "A" models, the unit
must be set to "external recirculation" mode.
Adjusting the water
temperature
1°F or 0.5°C increments
Press for 2 seconds to adjust in
5°F or 2°C increments
6. Select the recirculation mode.
A2-Type:
●
– Int.Recir (Always On/Intelligent/Weekly)
– Ext.Recir (Always On/Intelligent/Weekly/
HotButton)
S2-Type:
●
– Ext.Recir (Always On/Intelligent/Weekly/
HotButton)
If the weekly recirculation mode is
Note
selected, confirm all daily time settings,
then press and hold the OK button
(
) for more than 2 seconds to
complete the setup wizard.
7. Setup Summary
Once the Setup Wizard is finished, a summary
of the settings will be displayed. Press the OK
button (
) at each summary screen until the
main screen is displayed. Settings made in the
Setup Wizard can be adjusted from the Main
Menu and Installer Menu as described in Section
6.4 and 6.5.
6.3 Adjusting the Water
Temperature
WARNING
Before adjusting the water temperature, read
"To prevent burns:" on page 5 carefully.
Water 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.
If a hot water faucet is open, you can
Note
adjust the temperature only from 97 -
110 °F (36 - 43 °C).
2. Press the Up button (
(
) 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.
The water heater will retain your
Note
settings during a power outage.
You can adjust the temperature by 1 degree
increments as shown below, depending on the
temperature range:
Temperature range
97 °F - 120 °F (Fahrenheit mode)
36 °C - 50 °C (Celsius mode)
120 °F - 140 °F (Fahrenheit
mode)
50 °C - 60 °C (Celsius mode)
The water heater will not provide hot water instantly
through the hot water faucet unless a recirculation
line has been installed from the furthest fixture back
to the water heater. For "A2" models, the unit must
be set to "external recirculation" mode.
) or the Down button
Adjusting the water
temperature
1 °F or 0.5 °C
increments
1 °F or 0.5 °C
increments
Operating the Water Heater
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