Navien NHB-055, Service Manual

Page: 37 / 147

NHB Service Manual 37 Version 1.0
NOTE
●
The Outdoor Reset Control will take precedence over this
temperature setting.
●
In case of outdoor reset sensor malfunction, the boiler will
operate at this set temperature.
●
Take note of the original heating temperature in case you
want to restore it to the default.
●
The default space heating supply water temperature range
is 104°F (40°C, Absolute MIN) to 180°F (82°C, Absolute MAX).
●
The default space heating return water temperature range
is 86°F (30°C, Absolute MIN) to 149°F (65°C, Absolute MAX).
●
You can adjust the temperature range in the parameter
settings menu.
●
The boiler will retain your settings during a power outage.
4.4.7 Adjusting the DHW Temperature
WARNING
Be carefully before adjusting the water temperature. Water
above 120°F (52°C) can cause instant scalding, severe burns, or
death.
To adjust the water temperature:
1. Press the Mode button twice. The DHW mode icon turns on.
2. Press + (Up) or – (Down) buttons until the desired temperature
appears on the display.
MODE
You can adjust the temperature while the display is flashing. Once
the display stops flashing, the temperature setting is stored.
NOTE
●
Take note of the original DHW temperature in case you
want to restore it to the default.
●
The default DHW temperature range is 104°F (40°C,
Absolute MIN) to 180°F (82°C, Absolute MAX).
●
You can adjust the temperature range in the parameter
settings menu.
●
The boiler will retain your settings during a power outage.